gtk2/docs/gtk.texi

\input texinfo @c -*-texinfo-*-
@c Copyright (C) 1996 by Peter Mattis. All rights reserved.
@c Portions Copyright (C) 1998 Marius Vollmer
@c
@c %**start of header
@setfilename gtk.info
@settitle GTK
@setchapternewpage odd
@include macros.texi
@c %**end of header

@set edition 1.0
@set update-date 23 August 1998
@set update-month August 1998

@ifinfo
This file documents GTK, the GIMP Toolkit

Copyright (C) 1996 Peter Mattis
Copyright (C) 1997 Peter Mattis

Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
preserved on all copies

@ignore
Permission is granted to process this file through TeX and print the
results, provided the printed document carries copying permission notice
identical to this one except for the removal of this paragraph (this
paragraph not being relevant to the printed manual).

@end ignore
Permission is granted to copy and distribute modified versions of this
manual under the conditions for verbatim copying, provided that the
entire resulting derived work is distributed under the terms of a
permission notice identical to this one.

Permission is granted to copy and distribute translations of this manual
into another language, under the above conditions for modified versions,
except that this permission notice may be stated in a translation
approved by Peter Mattis.
@end ifinfo

@titlepage
@title The GIMP Toolkit
@subtitle Version @value{edition}
@subtitle @value{update-month}
@author by Peter Mattis and the GTK+ team

@page
@vskip 0pt plus 1filll
Copyright @copyright{} 1996 Peter Mattis
@vskip 0pt plus 1fill
Copyright @copyright{} 1997 Peter Mattis

Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are
preserved on all copies.

Permission is granted to copy and distribute modified versions of this
manual under the conditions for verbatim copying, provided that the
entire resulting derived work is distributed under the terms of a
permission notice identical to this one.

Permission is granted to copy and distribute translations of this manual
into another language, under the above conditions for modified versions,
except that this permission notice may be stated in a translation
approved by Peter Mattis.
@end titlepage

@dircategory User Interface Toolkit
@direntry
* GTK: (gtk).		The GIMP Toolkit
@end direntry

@node Top, Copying, (dir), (dir)
@top The GIMP Toolkit
@ifinfo
This is edition @value{edition} of the GTK documentation,
@w{@value{update-date}}.
@end ifinfo
@c FIXME: Do an introduction to the GTK?

@menu
* Copying::                     Your rights.
* Overview::                    What is GTK?
* Types::                       
* Objects::                     
* Signals::                     Signals overview.
* Widgets::                     Widget overview.
* Other Objects::               Utility objects.
* Miscellaneous::               Initialization, exit and other features.
* Examples::                    Using GTK.
* Object Implementation::       Object internals.
* Signal Implementation::       Signal internals.
* Widget Implementation::       Widget internals.
* Function Index::              Index of functions.
* Concept Index::               Index of concepts.
@end menu

@node Copying, Overview, Top, Top
@comment node-name, next, previous, up
@chapter Copying
@cindex Copying

GTK is @dfn{free}; this means that everyone is free to use it and free
to redistribute it on a free basis. GTK is not in the public domain; it
is copyrighted and there are restrictions on its distribution, but
these restrictions are designed to permit everything that a good
cooperating citizen would want to do. What is not allowed is to try to
prevent others from further sharing any version of GTK that they might
get from you.

Specifically, we want to make sure that you have the right to give away
copies of GTK, that you receive source code or else can get it if you
want it, that you can change GTK or use pieces of it in new free
programs, and that you know you can do these things.

To make sure that everyone has such rights, we have to forbid you to
deprive anyone else of these rights. For example, if you distribute
copies of GTK, you must give the recipients all the rights that you
have. You must make sure that they, too, receive or can get the source
code. And you must tell them their rights.

Also, for our own protection, we must make certain that everyone finds
out that there is no warranty for GTK. If GTK is modified by someone
else and passed on, we want their recipients to know that what they have
is not what we distributed, so that any problems introduced by others
will no reflect on our reputation.

The precise conditions of the licenses for GTK are found in the General
Public Licenses that accompany it.


@node Overview, Types, Copying, Top
@comment node-name, next, previous, up
@chapter What is GTK?
@cindex Overview

GTK is a library for creating graphical user interfaces similar to the
Motif ``look and feel''. It is designed to be small and efficient, but
still flexible enough to allow the programmer freedom in the interfaces
created. GTK allows the programmer to use a variety of standard user
interface widgets (@pxref{Widgets}) such as push, radio and check
buttons, menus, lists and frames. It also provides several ``container''
widgets which can be used to control the layout of the user interface
elements.

GTK provides some unique features. (At least, I know of no other widget
library which provides them). For example, a button does not contain a
label, it contains a child widget, which in most instances will be a
label. However, the child widget can also be a pixmap, image or any
combination possible the programmer desires. This flexibility is adhered
to throughout the library.

@c I think the next paragraph takes unproportionally much space for
@c the thing it wants to say (compared to the rest of this overview).
@c So Somebody please extend this overview with more generally interesting
@c stuff. - mvo

To make life easier for you, GTK presents this flexibility in a uniform
framework.  Specifically, it implements its own support for object
oriented programming that is well adapted to the purposes of a user
interface toolkit and it aims at providing a reasonable sane and
disciplined programming interface.  This uniformity and discipline is
intended to make it easy and reliable to access GTK from languages other
than C.  Especially more dynamic languages like Perl, Python or Scheme
will find amble support, and in fact, bindings to these languages
already exist.

@node Types, Objects, Overview, Top
@comment node-name, next, previous, up
@chapter Types
@cindex type
@cindex type system
@cindex class

@flushright
Other kid's games are all such a bore!
They've gotta have rules and they gotta keep score!
@*
-- Calvin about CalvinBall(tm)
@end flushright

GTK implements a semi-simple type system with an associated class
mechanism for widgets and several other useful objects.  This type
system is intended to be general enough to allow both a smooth binding
of dynamically typed languages to Gtk, as well as to serve for a
rigorous and formalistic definition of the larger part of the Gtk API.

@c  The GtkObject
@c  type is the root of the class hierarchy. It provides a few items needed
@c  by all classes, the foundation for the signal (@pxref{Signals})
@c  mechanism and the ``destroy'' method.

The classes for the individual widgets are by far the most important
part of this type system, but before we get to them, we describe the
basics of the type system itself.  This is mostly of interest for widget
writers and language binders, so you might want to skip ahead to the
next chapter, which talks about the object oriented stuff.

@menu
* Type introduction::           
* Basics::                      
* Simple types::                
* Enumerations and flags::      
* Strings::                     
* Boxed types::                 
* Callbacks::                   
* Composite types::             
@end menu

@node Type introduction, Basics, Types, Types
@section Introduction to the Type System

Gtk defines its own system of types, much like a computer language
defines what types it supports.  Of course, the Gtk type system is build
on top of the types that C provides, so it includes members like
@samp{int}, @samp{long} and @samp{float}.  But, compared to C, it allows
only few carefully selected types and specifies a lot of restrictions on
the way you can use values of these types.  For example, there is no
general facility for specifying @emph{pointer to X}.  Instead, we take a
more higher level approach and define such things as @samp{string},
which is just like a @code{char*} but with additional rules about how to
manage the memory that it points to.

The type system has two purposes: to define a formal system with which
to describe the various exported features of Gtk; and to implement this
system at run-time so that we get sound and flexible @dfn{dynamic} types
for the dynamic languages that want to interface with Gtk.

Let me restate this with different words, because I think it is
important to understand this idea.  We will see in a moment that the
type system is indeed well defined and all this detail is implemented
with functions and data structures in Gtk.  For example, every type (and
there can be any number of them) can be represented with a unique
integer and Gtk has support for the necessary bookkeeping for this.
Every type also has a name and there are functions for converting
between the name of a type and its unique number.  Maybe more useful,
there is a big discriminated union that can be used to pass around a
value of any representable type, together with its precise type.

This is the run-time or dynamic side of the type system.  Mostly, you do
not need to use it when you don't want to.  The compile-time or static
side of the type system can is used to statically define the programming
interface of Gtk.  For example, suppose there is function @code{gtk_foo}
in the Gtk API that has a prototype

@example
char *gtk_foo (char *);
@end example

This looks like it does something with strings.  But what does it do
with the memory of the string that has been passed in, and what are we
supposed or allowed to do with the memory that the returned pointer
points to?  The more restricted type @samp{string} from the Gtk type
system can be used to be more precise.  In fact, the definition of
@samp{string} below includes the rule that when a @samp{string} is
passed to a function, that function is not allowed to retain a pointer
into the string beyond the life time of that function call.  So we are
safe to deallocate it or override it when the function has returned.
Likewise, the definition specifies that the memory of a @samp{string}
that is returned from a function becomes the sole property of the
calling function.  The calling function is responsible for deallocating
it eventually and it can be sure that nobody else scribbles in it.  When
@samp{gtk_foo} really obeys these rules, we can say that it takes one
argument, which is a @samp{string}, and it returns a @samp{string}.

Now we can understand why it makes sense to have a more restrictive type
system than that of C.  With it, it is possible to be more precise and
we actually have a framework where we can be sure that as long as we
stay inside this framework we are not gratuitously causing trouble for
languages that are more disciplined than C.  Of course, you are not
restricted to making all your interfaces expressible within the
framework.  There are valid reasons for breaking it, for performance or
simply for convenience.  But please try to provide all the functionality
of your module in such a way that it can be described with this type
system and treat the non-conforming functions as additional goodies that
are nice to have but not essential.  The reward is an instant
accessibility of your code from a huge number of scripting and extension
languages such as Perl, Python, and Guile.

These formal specifications of the Gtk interface are contained in
special declarations in the header files of Gtk.  They are ignored by
the C compiler, but can be used by other language processors.  For extra
convenience, these declarations are also available in a more condensed
form that is easier to parse.  Tools for generating bindings of Gtk to
other languages can read these declarations and---because all the
important details are defined---automatically generate the bulk of the
needed glue code.  It is also possible to feed these declarations into a
running application (an interface builder, say) and thus make it aware of
new widgets and functions without recompiling anything.

The run-time side of the type system is also somewhat introspective.
This means that you can query Gtk about all the members of an
enumeration for example.  Gtk provides tools that help you provide this
introspection for your definitions also.

Types are not enough to completely specify an interface, so GTK also has
@dfn{modes}.  A mode specifies what happens to a value when it crosses a
module boundary; it can be @samp{in}, @samp{out}, or @samp{inout}.  Most
fundamental types (and their derived types) support only mode @samp{in}.
The modes @samp{out} and @samp{inout} can only be used with the
composite types: lists and vectors.  When argument of these types are
marked as @samp{out} or @samp{inout} it means that the called module is
allowed to change the contents of the composite value and that these
changes need to be propagated back to the originator of the value.  Mode
@samp{out} means that the argument has no meaningful value at the
beginning and should not be read.  Mode @samp{in} specifies that the
called module is not allowed to change the value in any way.

The type system allows for an unbounded number of types.  Every widget
is a type for example and you can add new widget types at any time
without confusing the run-time implementation of the type system.
Nevertheless, all types are derived from a certain @dfn{fundamental}
type, and there are only a small and finite number of fundamental types.
We only specify rules for the fundamental types and all other types
inherit these rules from their fundamental type.  For example,
@samp{int} is a fundamental type, as is @samp{GtkObject}.  All widgets
derive from @samp{GtkObject} and so the rules for @samp{GtkObject} apply
to all widgets as well.

This derivation defines a type hierarchy, but this hierarchy is not
completely general.  You can't derive from @samp{int} for example, and
you can only have one level of derivation from @samp{enum}.  The
fundamental type @samp{GtkObject}, however, is the basis for the large
and deep hierarchy of widget types.

The individual fundamental types are defined and explained in the
following sections.  Here is a complete list of them:

@table @samp
@item none
The not-a-value type, similar to @samp{void}.
@item char
A character.  Internationalization issues are still undecided.
@item bool
True or false.
@item byte, ubyte, int, uint, long, ulong, float, double
The usual assortment of scalar types.
@item string
A string.  Internationalization issues are still undecided.
@item enum, flags
Enumerations with a fixed set of literals.  Either used to express a
single choice from this set or to individually turn on and off several
flags.
@item boxed
A pointer to an opaque structure that can be copied and destroyed.
@item callback
A pointer to a function with enough extra information so that it can
also be used for functions written in languages completely different
from C.
@item GtkObject
A pointer to a GtkObject or derived type.  The fun starts here.
@item args, slist, dlist, cvec, tvec
An assortment of composite types like linked lists and counted or
zero-terminated arrays.
@item pointer, signal, c_callback
Obsolete types.
@end table

@node Basics, Simple types, Type introduction, Types
@section Basic Concepts

The basis for the type system are the fundamental types.  At run-time,
they are represented by members of the @code{GtkFundamentalType}
enumeration.  For the static declarations, they are identified with a
unique name.

@deftp {Enumeration} GtkFundamentalType
This enumeration contains a member for each defined fundamental type.
Most members are listed along with the description of their semantics,
but one is listed here:

@table @code
@item GTK_TYPE_INVALID
No valid type is derived from this.  Use @code{GTK_TYPE_INVALID} to
express exceptional situations.  This member does not really correspond
to a fundamental type and thus there is no name for it.
@end table
@end deftp

@deftp {Data type} GtkType
The type @code{GtkType} holds the run-time representation of a type.  It
is an integer of a certain size.  The follwing macros are defined to
access the basic properties of a @code{GtkType}:

@deftypefn {Macro} {unsigned int} GTK_TYPE_SEQNO (GtkType type)
Returns the sequence number of @var{type}.  The sequence numbers are
guaranteed to be dense, i.e., you can use them to index a table and the
table need not be much larger than the number of different GtkTypes that
you might encounter.
@end deftypefn

@deftypefn {Macro} GtkFundamentalType GTK_FUNDAMENTAL_TYPE (GtkType type)
Returns the fundamental type of @var{type}.
@end deftypefn

Both macros simply access different bit-fields of a @code{GtkType}, so
they are very efficient.
@end deftp

New types are registered with the @code{gtk_type_unique} function.  Any
kind oftype can be registered with @code{gtk_type_unique} but there are
convenience functions for most fundamental types.  Each fundamental type
has its own interpretation of the rules below and these convenience
functions should be used to automatically get the type registration
right.  So, don't be put off by the apparent complexity of the interface
to @code{gtk_type_unique}.  You will be using it only for new widgets,
and there the rules are simple.

The @code{GtkTypeInfo} structure is used to communicate information to
@code{gtk_type_unique} as opposed to passing in large numbers of
parameters.

@example
typedef struct _GtkTypeInfo GtkTypeInfo;

struct _GtkTypeInfo
@{
  gchar *type_name;
  guint object_size;
  guint class_size;
  GtkClassInitFunc class_init_func;
  GtkObjectInitFunc object_init_func;
  gpointer reserved_1;
  gpointer reserved_2;
  GtkClassInitFunc base_class_init_func;
@}
@end example

@itemize @bullet
@item
The @code{type_name} field refers to the name of the type.  This is the
same name that is used in the static definitions.  It is convention for
the type name to be closely related to the name of the underlying C
type. For example, the type name of the @code{GtkObject} structure is
``GtkObject'', and the name of the @code{GtkWindowType} enumeration is
``GtkWindowType''.  Note that the C type corresponding to ``GtkObject''
is really a pointer to a @code{GtkObject} struct, but the name has no
``*'' in it.

@item
The @code{object_size} field refers to the size in bytes of the C
structure for types that have such a structure. The easiest (and
portable) means of computing this size is by using the C @code{sizeof}
operator. For instance, the sizeof of the @code{GtkObject} structure is
computed by doing @code{sizeof (GtkObject)}.  When the type has no
associated structure or when you do not want to support the
@code{gtk_type_new} function for the new type, set @code{object_size} to
0.  Only types derived from GTK_TYPE_OBJECT can be handled by
@code{gtk_type_new}, anyway.

@item
The @code{class_size} field refers to the size in bytes of the C
structure for the class.  Again, the @code{sizeof} operator should be
used to compute this value.  If you don't want to have a class structure
for this type, set the field to 0.  @code{gtk_type_class} will then
always return @code{NULL}.

@item
The @code{class_init_func} and @code{base_class_init_func} fields are
callbacks which are used by the type mechanism to initialize class
specific fields. The single argument these functions take is a pointer to
a class structure.  When you do not need one or both of them, set the
corresponding field to @code{NULL}.  The @code{class_init_func} will be
called at most once, right after the class structure of size
@code{class_size} has been allocated.  The interaction between
@code{class_init_func} and @code{base_class_init_func} is only really
useful for the full-fledged object system.  It is described there
@pxref{Objects}.

@item
The @code{object_init_func} field is a callback which is used by the
type mechanism to initialize object specific fields for structures that
have been allocated via @code{gtk_type_new}. The single argument this
functions takes is a pointer to an object structure.  If you do not want
any special object initialization to take place, set this to
@code{NULL}.  All object initialization functions for all types that are
part of the inheritance chain are called, starting with the most basic
type.

@end itemize

@deftypefun guint gtk_type_unique (GtkType @var{parent_type}, GtkTypeInfo *@var{type_info})
The @var{parent_type} is simply the new types parent type. If
@var{parent_type} is GTK_TYPE_INVALID, then the new type is a new
fundamental type.  You should @b{never} register new fundamental types.
@var{type_info} is a pointer to a structure which contains necessary
information for construction of the new type.

You can only register a specific name once.
@end deftypefun

@deftypefun gchar* gtk_type_name (GtkType @var{type})
The returned string is the name of @var{type} as specified to
@code{gtk_type_unique}.
@end deftypefun

@deftypefun GtkType gtk_type_from_name (guchar *@var{name})
Return the type associated with @var{name}. If there is no type
associated with @var{name}, then GTK_TYPE_INVALID will be returned.
@end deftypefun

@deftypefun GtkType gtk_type_parent (GtkType @var{type})
Returns the parent type of @var{type} or GTK_TYPE_INVALID if @var{type}
is a fundamental type.
@end deftypefun

@deftypefun gpointer gtk_type_class (GtkType @var{type})
Returns the initialized class structure for @var{type}. The class
structure is actually created and initialized the first time it is
needed.  Refer to @pxref{Objects} for details on how this initialization works for GTK_TYPE_OBJECT derived types.

@c  If creation and initialization occurs, the @code{class_size}
@c  field of the @code{GtkTypeInfo} structure used to initialize this type
@c  is used to determine how large the class structure is. The
@c  @code{class_init_func} field from the @code{GtkTypeInfo} structure is
@c  called for all the members in the types ancestry, including the
@c  type. The order of this invocation proceeds from the root on down. For
@c  example, the @code{GtkWidgetClass} is first initialized as an
@c  @code{GtkObjectClass} by the object class initialization routine and
@c  then by the widget class initialization routine. This allows the widget
@c  class initialization routine to override values set by the object class
@c  initialization routine.

The returned structure is shared by all objects of @var{type} and, as
such, should not be modified.
@end deftypefun

@deftypefun gpointer gtk_type_new (GtkType @var{type})
Returns a new instance of an @var{type} object.  This works only for GTK_TYPE_OBJECT derived types.  Please see @pxref{Objects}.
@c  The @code{object_size}
@c  and @code{object_init_func} fields of the @code{GtkTypeInfo} structure
@c  are used to determine the objects allocated size and the object specific
@c  initialization routine. Similarly to the class initialization, all the
@c  object initialization routines from the root on down to the particular
@c  type being created are invoked.
@end deftypefun

@deftypefun void gtk_type_describe_heritage (GtkType @var{type})
Prints the type heritage for @var{type}. The heritage for a type
includes the type and all its parent types up the type tree.
@end deftypefun

@deftypefun void gtk_type_describe_tree (GtkType @var{type}, gboolean @var{show_size})
Prints the type tree which starts at @var{type}. @var{show_size} is a
boolean which determines whether type sizes are printed.
@end deftypefun

@deftypefun gboolean gtk_type_is_a (GtkType @var{type}, GtkType @var{is_a_type})
A predicate function which determines whether the relation @var{type}
is_a @var{is_a_type} is true.
@end deftypefun

@c  @deftypefun void gtk_type_get_arg (GtkObject *@var{object}, GtkType @var{type}, GtkArg *@var{arg}, guint @var{arg_id})
@c  @end deftypefun

@c  @deftypefun void gtk_type_set_arg (GtkObject *@var{object}, GtkType @var{type}, GtkArg *@var{arg}, guint @var{arg_id})
@c  @end deftypefun

Values of all types can be handled uniformly by storing them into a
@code{GtkArg} structure.  The @code{GtkArg} has the following fields:

@table @code
@item gchar *name
This can be used to give the value represented by this @code{GtkArg}
structure a name.  It is not used much.

@item GtkType type
The type of this value.

@item union d
A big union that has (at least conceptually) one member for each
fundamental type.  You should not access these members directly.
Rather, use the @code{GTK_VALUE_*} macros.  There is one macro for each
fundamental type, and its name is derived from the name of the
GtkFundamentalType enumeration members simply by replacing ``Gtk_TYPE''
with ``GTK_VALUE''.  All @code{GTK_VALUE_*} macros take a @code{GtkArg}
structure as their only parameter (@emph{not} a pointer) and evaluate to
a lvalue.
@end table

For example, the accessor for the fundamental type GTK_TYPE_INT is
called GTK_VALUE_INT and you could use it like this:

@example
GtkArg value;

value.name = NULL;
value.type = GTK_TYPE_INT;
GTK_VALUE_INT(value) = 7;
@end example

@node Simple types, Enumerations and flags, Basics, Types
@section Simple Types

The Gtk type system has a full set of the usual simple types: integers,
floating point numbers, but also boolean and character.  You can not
derive new types from these.

@multitable {GTK_TYPE_POINTER} {"gpointer"} {xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx}
@item Enum @tab Name @tab Description
@item GTK_TYPE_NONE @tab "void"
@tab A type without value.
@item GTK_TYPE_CHAR @tab "char"
@tab A 8-bit unsigned number representing a character.  Numbers
     between 0 and 127 are ASCII, the rest is undefined.
@item GTK_TYPE_BOOL @tab "gboolean"
@tab The boolean type.  It is some small integer where the number 0
     represents false and 1 is true.  No other values are allowed.
@item GTK_TYPE_INT @tab "gint"
@tab A signed integer with at least 32 bits.
@item GTK_TYPE_UINT @tab "guint"
@tab A unsigned integer with at least 32 bits.
@item GTK_TYPE_LONG @tab "glong"
@tab A signed integer with at least 32 bits.
@item GTK_TYPE_ULONG @tab "gulong"
@tab A unsigned integer with at least 32 bits.  This is large enough to
     hold a coerced pointer.
@item GTK_TYPE_FLOAT @tab "gfloat"
@tab A single precision floating point number.
@item GTK_TYPE_DOUBLE @tab "gfloat"
@tab A souble precision floating point number.
@item GTK_TYPE_POINTER @tab "gpointer"
@tab A untyped pointer.  Do not use this if you can avoid it.
@end multitable

The values of these types are all represented `directly' with the C
types that are indicated in the `name' column above.  @pxref{Boxed
types} for a discussion of this.

@node Enumerations and flags, Strings, Simple types, Types
@section Enumerations and Flags

@node Strings, Boxed types, Enumerations and flags, Types
@section Strings

@node Boxed types, Callbacks, Strings, Types
@section Boxed Types

@node Callbacks, Composite types, Boxed types, Types
@section Callbacks

@node Composite types,  , Callbacks, Types
@section Composite Types

@node Objects, Signals, Types, Top
@chapter Objects





















@section Object functions

The GtkObject type is the root of the type hierarchy used by GTK. It
provides a minimal set of fields used to implement the actual object,
class and signal mechanisms, as well as several utility routines which
make dealing with objects easier.

For the adventurous, see @ref{Object Implementation}.

@deftypefun guint gtk_object_get_type (void)
Returns the @code{GtkObject} type identifier.
@end deftypefun

@deftypefun void gtk_object_class_add_signals (GtkObjectClass *@var{class}, gint *@var{signals}, gint @var{nsignals})
Adds @var{signals} to the @code{signals} field in the GtkObjectClass
structure @var{class}. @xref{Signals}.
@end deftypefun

@deftypefun GtkObject* gtk_object_new (guint @var{type}, @dots{})
@end deftypefun

@deftypefun GtkObject* gtk_object_newv (guint @var{type}, guint @var{nargs}, GtkArg *@var{args})
@end deftypefun

@deftypefun void gtk_object_ref (GtkObject *@var{object});
@end deftypefun

@deftypefun void gtk_object_unref (GtkObject *@var{object});
@end deftypefun

@deftypefun void gtk_object_getv (GtkObject *@var{object}, guint @var{nargs}, GtkArg *@var{args})
@end deftypefun

@deftypefun void gtk_object_set (GtkObject *@var{object}, @dots{})
@end deftypefun

@deftypefun void gtk_object_setv (GtkObject *@var{object}, guint @var{nargs}, GtkArg *@var{args})
@end deftypefun

@deftypefun GtkArg* gtk_object_query_args (GtkType @var{class_type}, guint *@var{nargs})
@end deftypefun

@deftypefun void gtk_object_add_arg_type (gchar *@var{arg_name}, GtkType @var{arg_type}, guint @var{arg_id})
@end deftypefun

@deftypefun GtkType gtk_object_get_arg_type (gchar *@var{arg_name})
@end deftypefun


@deftypefun void gtk_object_destroy (GtkObject *@var{object})
Performs checks to make sure it is alright to destroy @var{object} and
then emits the @code{destroy} signal. The check which is performed is to
make sure @var{object} is not already processing another signal. If this
were the case then destroying the object immediately would undoubtedly
cause problems as the other signal would not be able to tell the object
was destroyed. The solution is that if @var{object} is processing another
signal we mark @var{object} is needing to be destroyed. When we finish
processing of the other signal we check whether the object needs to be
destroyed.
@end deftypefun

The GtkObject type provides a mechanism for associating arbitrary
amounts of data with an object. The data is associated with the object
using a character string key. The functions @code{gtk_object_set_data},
@code{gtk_object_get_data}, and @code{gtk_object_remove_data} are the
interface to this mechanism. Two other routines,
@code{gtk_object_set_user_data} and @code{gtk_object_get_user_data},
exist as convenience functions which simply use the same mechanism.

@deftypefun void gtk_object_set_data (GtkObject *@var{object}, const char *@var{key}, gpointer @var{data})
Associate @var{data} with @var{key} in the data list of @var{object}.
@end deftypefun

@deftypefun gpointer gtk_object_get_data (GtkObject *@var{object}, const char *@var{key})
Retrieve the data associated with @var{key} in the data list of @var{object}.
@end deftypefun

@deftypefun void gtk_object_remove_data (GtkObject *@var{object}, const char *@var{key})
Remove the data associated with @var{key} in the data list of @var{object}.
@end deftypefun

@deftypefun void gtk_object_set_user_data (GtkObject *@var{object}, gpointer @var{data})
Sets @var{data} into the @code{user_data} field of @var{object}.
@end deftypefun

@deftypefun gpointer gtk_object_get_user_data (GtkObject *@var{object})
Returns the @code{user_data} field of @var{object}.
@end deftypefun

@c ------------ Is this deprecated? -----------------

The GtkObject type also provides a mechanism for specifying
initialization values for fields. This general mechanism is called
object value stacks. The reason for using value stacks is that they can
simplify the life of the programmer. For instance, by default widgets
are non-visible when created. However, the ``visible'' value for widgets
may be specified so that widgets are made visible when created. (FIXME:
unfinished).

@deftypefun void gtk_object_value_stack_new (guint @var{object_type}, const gchar *@var{value_id}, GtkParamType @var{value_type})
@end deftypefun

@deftypefun void gtk_object_push_value (guint @var{object_type}, const gchar *@var{value_id}, @dots{})
Push a value on the value stack specified by @var{object_type} and
@var{value_id}. The type of value is implicitly given in the context of
@var{object_type} and @var{value_id}. (That is, it is not specified
explicitly in the function call). Only a single extra argument is
expected which is the data which is to be placed on the stack.
@end deftypefun

@deftypefun void gtk_object_pop_value (guint @var{object_type}, const gchar *@var{value_id})
Pop a value of the value stack specified by @var{object_type} and
@var{value_id}.
@end deftypefun

@deftypefun gint gtk_object_peek_value (guint @var{object_type}, const gchar *@var{value_id}, gpointer @var{data})
Peek at the value on the top of the value stack specified by
@var{object_type} and @var{value_id}. The @var{data} argument is
interpreted as the location of where to place the ``peeked'' data. For
instance, if the peeked data is of type @code{GTK_PARAM_POINTER}, then
@var{data} will be a pointer to a pointer. If the value stack is empty
or does not exist or an error occurs, @code{gtk_object_peek_value} will
return @code{FALSE}. On success it will return @code{TRUE}.
@end deftypefun


@node Signals, Widgets, Objects, Top
@comment node-name, next, previous, up
@chapter Signals Overview
@cindex Signals

Signals are GTK's method for objects to perform callbacks. A signal is
an event which occurs upon an object. The programmer can connect to a
signal of an object which involves specifying a function to be called
when that signal is emitted in the specified object.

When a signal is emitted, both the class function associated with the
signal (when it was defined) and all signal handlers installed for that
signal on the particular object emitting the signal are called. The
widget programmer can specify whether the class function is to be called
before after or both before and after the signal handlers installed by
the widget user. The widget user can, however, specify that their signal
handler is to be run after the class function (using the ``_after''
signal connection routines). Any signal handling function can emit the
same signal on the same object while it is running causing that signal
emission to either restart or to run recursively. Additionally, signal
emission can be terminated prematurely. While both such abilities are
rarely used, they do allow for greater flexibility in regards to
signals. For instance, a programmer can attach to the key press event
signal and intercept all tab key presses from a widget. This particular
example is used in the file selection dialog to implement tab completion
of filenames and prevent the entry widget from inserting the tab into
its buffer.

Signals are selected using either an integer identifier or a character
string name. It is convention to name the signal the same as the class
function which is associated with it. There are two versions of most of
the signal functions, one which takes an integer identifier and one
which takes a character string name for the signal.

@deftypefun gint gtk_signal_new (gchar *@var{name}, GtkSignalRunType @var{run_type}, gint @var{object_type}, gint @var{function_offset}, GtkSignalMarshaller @var{marshaller}, GtkParamType @var{return_val}, gint @var{nparams}, @dots{})
Create a new signal and give it the character string identifier
@var{name}. @var{name} needs to be unique in the context of
@var{object_type}'s branch of the class hierarchy. That is,
@var{object_type} cannot create a signal type with the same name as a
signal type created by one of its parent types.

@var{run_type} specifies whether the class function should be run before
(@code{GTK_RUN_FIRST}), after (@code{GTK_RUN_LAST}) or both before and
after normal signal handlers (@code{GTK_RUN_BOTH}). Additionally, the
@code{GTK_RUN_NO_RECURSE} value can be or'ed with any of those values to
specify that the signal should not be recursive. By default, emitting
the same signal on the same widget will cause the signal to be emitted
twice. However, if the @code{GTK_RUN_NO_RECURSE} flag is specified,
emitting the same signal on the same widget will cause the current
signal emission to be restarted. This allows the widget programmer to
specify the semantics of signal emission on a per signal
basis. (The @code{GTK_RUN_NO_RECURSE} flag is used by the GtkAdjustment
widget).

The @var{function_offset} is the byte offset from the start of the class
structure to the class function field within the class structure. The
easiest means to compute this offset is by using the
@code{GTK_SIGNAL_OFFSET} macro which takes the class structure type as
the first argument and the field as the second argument. For example,
@code{GTK_SIGNAL_OFFSET (GtkObjectClass, destroy)} will give the offset
of the @code{destroy} class function within the
@code{GtkObjectClass}. Note: An offset is specified instead of an
absolute location since there will be multiple instances of a class
structure being referenced. (The @code{GtkWidgetClass} structure ``is
a'' @code{GtkObjectClass} structure, etc.)

The @var{marshaller} function is used to invoke a signal handler. Since
signal handlers may take different parameters and return values and a
general mechanism for invoking them is not apparent, the approach of
making the signal creator responsible for invoking the signal handler
was taken. (FIXME: unfinished).

The @var{return_val} and @var{nparams} and the remaining arguments
specify the return value and the arguments to the signal handler
respectively. Note: There is an implicit first argument to every signal
handler which is the widget the signal has been emitted from. The
variable argument list (@var{@dots{}}) specifies the types of the
arguments. These can be one of @code{GTK_PARAM_CHAR},
@code{GTK_PARAM_SHORT}, @code{GTK_PARAM_INT}, @code{GTK_PARAM_LONG},
@code{GTK_PARAM_POINTER} or @code{GTK_PARAM_FUNCTION}. It is undefined
to specify @code{GTK_PARAM_NONE} as an argument type, however it is OK
to use @code{GTK_PARAM_NONE} for @var{return_val}. (This corresponds to
returning a @code{void}).

@code{gtk_signal_new} returns the integer identifier of the newly
created signal. Signal identifiers start numbering at 1 and increase
upwards. A value of -1 will be returned if an error occurs.

@strong{Note:} @code{gtk_signal_new} is only needed by widget writers. A
normal user of GTK will never needed to invoke this function.
@end deftypefun

@deftypefun gint gtk_signal_lookup (gchar *@var{name}, gint @var{object_type})
Returns the integer identifier for the signal referenced by @var{name}
and @var{object_type}. If @var{object_type} does not define the signal
@var{name}, then the signal is looked for in @var{object_type}'s parent
type recursively.
@end deftypefun

@deftypefun gchar* gtk_signal_name (gint @var{signal_num})
@end deftypefun

@deftypefun gint gtk_signal_emit (GtkObject *@var{object}, gint @var{signal_type}, @dots{})
Emit the signal specified by the integer identifier @var{signal_type}
from @var{object}. If an error occurs, @code{gtk_signal_emit} will
return @code{FALSE} and will return @code{TRUE} on success. The signal
definition determines the parameters passed in the variable argument
list (@code{@dots{}}). For example, if the signal is defined as:

@example
  gint (* event) (GtkWidget *widget, GdkEvent *event);
@end example

Then a call to emit the ``event'' signal would look like:

@example
  GdkEvent event;
  gint return_val;
  @dots{}
  gtk_signal_emit (some_object,
                   gtk_signal_lookup ("event",
                     GTK_OBJECT_TYPE (some_object)),
                   &event, &return_val);
@end example

Notice that the @code{widget} argument is implicit in that the first
argument to every signal is a type derived from @code{GtkObject}. The
@var{return_val} argument is actually a pointer to the return value type
since the signal mechanism needs to be able to place the return value in
an actual location. And lastly, the @code{gtk_signal_lookup} call is
normally avoided by using the @code{gtk_signal_emit_by_name} function
instead. @code{gtk_signal_emit} is normally used internally by widgets
which know the signal identifier (since they defined the signal) and can
therefore side-step the cost of calling @code{gtk_signal_lookup}.
@end deftypefun

@deftypefun gint gtk_signal_emit_by_name (GtkObject *@var{object}, gchar *@var{name}, @dots{})
Similar to @code{gtk_signal_emit} except that the signal is referenced
by @var{name} instead of by its integer identifier.
@end deftypefun

@deftypefun void gtk_signal_emit_stop (GtkObject *@var{object}, gint @var{signal_type})
Stop the emission of the signal @var{signal_type} on
@var{object}. @var{signal_type} is the integer identifier for the signal
and can be determined using the function
@code{gtk_signal_lookup}. Alternatively, the function
@code{gtk_signal_emit_stop_by_name} can be used to refer to the signal
by name. Attempting to stop the emission of a signal that isn't being
emitted does nothing.
@end deftypefun

@deftypefun void gtk_signal_emit_stop_by_name (GtkObject *@var{object}, gchar *@var{name})
Similar to @code{gtk_signal_emit_stop} except that the signal is
referenced by @var{name} instead of by its integer identifier.
@end deftypefun

@deftypefun gint gtk_signal_connect (GtkObject *@var{object}, gchar *@var{name}, GtkSignalFunc @var{func}, gpointer @var{func_data})
Connects a signal handling function to a signal emitting
object. @var{func} is connected to the signal @var{name} emitted by
@var{object}. The arguments and returns type of @var{func} should match
the arguments and return type of the signal @var{name}. However,
@var{func} may take the extra argument of @var{func_data}. Due to the C
calling convention it is OK to ignore the extra argument. (It is OK to
ignore all the arguments in fact).

@code{gtk_signal_connect} returns an integer identifier for the
connection which can be used to refer to it in the future. Specifically
it is useful for removing the connection and/or blocking it from being
used.
@end deftypefun

@deftypefun gint gtk_signal_connect_after (GtkObject *@var{object}, gchar *@var{name}, GtkSignalFunc @var{func}, gpointer @var{func_data})
Similar to @code{gtk_signal_connect} except the signal handler is
connected in the ``after'' slot. This allows a signal handler to be
guaranteed to run after other signal handlers connected to the same
signal on the same object and after the class function associated with
the signal.

Like @code{gtk_signal_connect}, @code{gtk_signal_connect_after} returns
an integer identifier which can be used to refer to the connection.
@end deftypefun

@deftypefun gint gtk_signal_connect_object (GtkObject *@var{object}, gchar *@var{name}, GtkSignalFunc @var{func}, GtkObject *@var{slot_object})
Connects @var{func} to the signal @var{name} emitted by
@var{object}. Similar to @code{gtk_signal_connect} with the difference
that @var{slot_object} is passed as the first parameter to @var{func}
instead of the signal emitting object. This can be useful for connecting
a signal emitted by one object to a signal in another object. A common
usage is to connect the ``destroy'' signal of dialog to the ``clicked''
signal emitted by a ``close'' button in the dialog. That is, the
``clicked'' signal emitted by the button will caused the ``destroy''
signal to be emitted for the dialog. This is also the ``right'' way to
handle closing of a dialog since the ``destroy'' signal will be sent if
the dialog is deleted using a window manager function and this enables
the two methods of closing the window to be handled by the same
mechanism. Returns an integer identifier which can be used to refer to
the connection.
@end deftypefun

@deftypefun gint gtk_signal_connect_object_after (GtkObject *@var{object}, gchar *@var{name}, GtkSignalFunc @var{func}, GtkObject *@var{slot_object})
Similar to @code{gtk_signal_connect_object} except the signal handler is
connected in the ``after'' slot. This allows a signal handler to be
guaranteed to run after other signal handlers connected to the same
signal on the same object and after the class function associated with
the signal. Returns an integer identifier which can be used to refer to
the connection.
@end deftypefun

@deftypefun gint gtk_signal_connect_interp (GtkObject *@var{object}, gchar *@var{name}, GtkCallbackMarshal @var{func}, gpointer @var{data}, GtkDestroyNotify @var{destroy_func}, gint @var{after})
@end deftypefun

@deftypefun void gtk_signal_disconnect (GtkObject *@var{object}, gint @var{id})
Disconnects a signal handler from an object. The signal handler is
identified by the integer @var{id} which is returned by the
@code{gtk_signal_connect*} family of functions.
@end deftypefun

@deftypefun void gtk_signal_disconnect_by_data (GtkObject *@var{object}, gpointer @var{data})
Disconnects a signal handler from an object. The signal handler is
identified by the @var{data} argument specified as the @var{func_data}
argument to the @code{gtk_signal_connect*} family of functions. For the
@code{gtk_signal_connect_object*} functions, @var{data} refers to the
@var{slot_object}.

@strong{Note:} This will remove all signal handlers connected to
@var{object} which were connected using @var{data} as their
@var{func_data} argument. Multiple signal handlers may be disconnected
with this call.
@end deftypefun

@deftypefun void gtk_signal_handler_block (GtkObject *@var{object}, gint @var{id})
Blocks calling of a signal handler during signal emission. The signal
handler is identified by the integer @var{id} which is returned by the
@code{gtk_signal_connect*} family of functions. If the signal is already
blocked no change is made.
@end deftypefun

@deftypefun void gtk_signal_handler_block_by_data (GtkObject *@var{object}, gint @var{data})
Blocks calling of a signal handler during signal emission. The signal
handler is identified by the @var{data} argument specified as the
@var{func_data} argument to the @code{gtk_signal_connect*} family of
functions. For the @code{gtk_signal_connect_object*} functions,
@var{data} refers to the @var{slot_object}. If the signal is already
blocked no change is made.

@strong{Note:} This will block all signal handlers connected to
@var{object} which were connected using @var{data} as their
@var{func_data} argument. Multiple signal handlers may be blocked
with this call.
@end deftypefun

@deftypefun void gtk_signal_handler_unblock (GtkObject *@var{object}, gint @var{id})
Unblocks calling of a signal handler during signal emission. The signal
handler is identified by the integer @var{id} which is returned by the
@code{gtk_signal_connect*} family of functions. If the signal is already
unblocked no change is made.
@end deftypefun

@deftypefun void gtk_signal_handler_unblock_by_data (GtkObject *@var{object}, gint @var{data})
Unblocks calling of a signal handler during signal emission. The signal
handler is identified by the @var{data} argument specified as the
@var{func_data} argument to the @code{gtk_signal_connect*} family of
functions. For the @code{gtk_signal_connect_object*} functions,
@var{data} refers to the @var{slot_object}. If the signal is already
unblocked no change is made.

@strong{Note:} This will unblock all signal handlers connected to
@var{object} which were connected using @var{data} as their
@var{func_data} argument. Multiple signal handlers may be unblocked
with this call.
@end deftypefun

@deftypefun void gtk_signal_handlers_destroy (GtkObject *@var{object})
Destroy all of the signal handlers connected to @var{object}. There
should normally never be reason to call this function as it is called
automatically when @var{object} is destroyed.
@end deftypefun

@deftypefun void gtk_signal_default_marshaller (GtkObject *@var{object}, GtkSignalFunc @var{func}, gpointer @var{func_data}, GtkSignalParam *@var{params})
@code{gtk_signal_new} requires a callback in order to actually call a
signal handler for a particular signal. The vast majority of signals are
of the particular form:

@example
  (* std_signal) (gpointer std_arg);
@end example

@code{gtk_signal_default_marshaller} is a signal marshaller which
marshals arguments for a signal of that form.
@end deftypefun

@deftypefun void gtk_signal_set_funcs (GtkSignalMarshal @var{marshal_func}, GtkSignalDestroy @var{destroy_fun})
@end deftypefun


@node Widgets, Other Objects, Signals, Top
@comment node-name, next, previous, up
@chapter Widget Overview
@cindex Widgets


Widgets are the general term used to describe user interface objects. A
widget defines a class interface that all user interface objects conform
to. This interface allows a uniform method for dealing with operations
common to all objects such as hiding and showing, size requisition and
allocation and events.

The common interface that widgets must adhere to is described by the
GtkWidget and GtkWidgetClass structure. For the purposes of using GTK
these structures can be considered read-only and, for the most part,
opaque.

All widget creation routines in GTK return pointers to GtkWidget
structures. In reality, all widget creation routines create structures
that can be viewed as equivalent to the GtkWidget structure, but often
have contain additional information. @xref{Object Implementation}.

The widgets available for use are implemented in a hierarchy. Several
widgets exist solely as common bases for more specific widgets. For
example, it is not possible to create a ruler widget itself, but the
ruler widget provides a base and functionality common to the horizontal
and vertical rulers.

The available widgets (in alphabetical order):

@menu
* GtkAlignment::                The alignment widget.
* GtkArrow::                    The arrow widget.
* GtkAspectFrame::              The aspect frame widget.
* GtkBin::                      The bin widget.
* GtkBox::                      The box widget.
* GtkButtonBox::                The button box widget.
* GtkButton::                   The button widget.
* GtkCheckButton::              The check button widget.
* GtkCheckMenuItem::            The check menu item widget.
* GtkCList::                    The compound list widget.
* GtkColorSelection::           The color selector widget.
* GtkCombo::                    The combo box widget.
* GtkContainer::                The container widget.
* GtkCTree::                    The multi-column tree widget.
* GtkCurve::                    The curve widget.
* GtkGammaCurve::               The gamma curve widget.
* GtkDialog::                   The dialog widget.
* GtkDrawingArea::              The drawing area widget.
* GtkEntry::                    The entry widget.
* GtkEventBox::                 The event box widget.
* GtkFileSelection::            The file selection dialog widget.
* GtkFixed::                    The fixed widget.
* GtkFrame::                    The frame widget.
* GtkGamma::                    The gamma widget.
* GtkHBox::                     The horizontal box widget.
* GtkHButtonBox::               The horizontal button box widget.
* GtkHPaned::                   The horizontal paned widget.
* GtkHRuler::                   The horizontal ruler widget.
* GtkHScale::                   The horizontal scale widget.
* GtkHScrollbar::               The horizontal scrollbar widget.
* GtkHSeparator::               The horizontal separator widget.
* GtkImage::                    The image widget.
* GtkInputDialog::              The input dialog widget.
* GtkItem::                     The item widget.
* GtkLabel::                    The label widget.
* GtkList::                     The list widget.
* GtkListItem::                 The list item widget.
* GtkMenu::                     The menu widget.
* GtkMenuBar::                  The menu bar widget.
* GtkMenuItem::                 The menu item widget.
* GtkMenuShell::                The menu shell widget.
* GtkMisc::                     The misc widget.
* GtkNotebook::                 The notebook widget.
* GtkOptionMenu::               The option menu widget.
* GtkPaned::                    The paned widget.
* GtkPixmap::                   The pixmap widget.
* GtkPreview::                  The preview widget.
* GtkProgressBar::              The progress bar widget.
* GtkRadioButton::              The radio button widget.
* GtkRadioMenuItem::            The radio menu item widget.
* GtkRange::                    The range widget.
* GtkRuler::                    The ruler widget.
* GtkScale::                    The scale widget.
* GtkScrollbar::                The scrollbar widget.
* GtkScrolledWindow::           The scrolled window widget.
* GtkSeparator::                The separator widget.
* GtkStatusbar::                The statusbar widget.
* GtkTable::                    The table widget.
* GtkText::                     The text widget.
* GtkToggleButton::             The toggle button widget.
* GtkToolbar::                  The tool bar widget.
* GtkTooltips::                 The tool tips widget.
* GtkTree::                     The tree widget.
* GtkTreeItem::                 The tree item widget.
* GtkVBox::                     The vertical box widget.
* GtkVButtonBox::               The vertical button box widget.
* GtkViewport::                 The viewport widget.
* GtkVPaned::                   The vertical paned widget.
* GtkVRuler::                   The vertical ruler widget.
* GtkVScale::                   The vertical scale widget.
* GtkVScrollbar::               The vertical scrollbar widget.
* GtkVSeparator::               The vertical separator widget.
* GtkWidget::                   The base widget type.
* GtkWindow::                   The window widget.
@end menu

@node GtkAlignment, GtkArrow, Widgets, Widgets
@comment node-name, next, previous, up
@section The alignment widget


@subsection Description

The alignment widget is a container (@pxref{GtkContainer}) derived from
the bin widget (@pxref{GtkBin}). Its entire purpose is to give the
programmer flexibility in how the child it manages is positioned when a
window is resized.

Normally, a widget is allocated at least as much size as it
requests. (@pxref{GtkContainer} for a discussion of geometry
management). When a widget is allocated more size than it requests there
is a question of how the widget should expand. By convention, most GTK
widgets expand to fill their allocated space. Sometimes this behavior is
not desired. The alignment widget allows the programmer to specify how a
widget should expand and position itself to fill the area it is
allocated.

@subsection Options

@defopt xscale
@defoptx yscale
The @var{xscale} and @var{yscale} options specify how to scale the child
widget. If the scale value is 0.0, the child widget is allocated exactly
the size it requested in that dimension. If the scale value is 1.0, the
child widget is allocated all of the space in a dimension. A scale value
of 1.0 for both x and y is equivalent to not using an alignment widget.
@end defopt

@defopt xalign
@defoptx yalign
The @var{xalign} and @var{yalign} options specify how to position the
child widget when it is not allocated all the space available to it
(because the @var{xscale} and/or @var{yscale} options are less than
1.0). If an alignment value is 0.0 the widget is positioned to the left
(or top) of its allocated space. An alignment value of 1.0 positions the
widget to the right (or bottom) of its allocated space. A common usage
is to specify @var{xalign} and @var{yalign} to be 0.5 which causes the
widget to be centered within its allocated area.
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_alignment_get_type (void)
Returns the @code{GtkAlignment} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_alignment_new (gfloat @var{xalign}, gfloat @var{yalign}, gfloat @var{xscale}, gfloat @var{yscale})
Create a new @code{GtkAlignment} object and initialize it with the
values @var{xalign}, @var{yalign}, @var{xscale} and @var{yscale}. The
new widget is returned as a pointer to a @code{GtkWidget}
object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_alignment_set (GtkAlignment *@var{alignment}, gfloat @var{xalign}, gfloat @var{yalign}, gfloat @var{xscale}, gfloat @var{yscale})
Set the @var{xalign}, @var{yalign}, @var{xscale} and @var{yscale} options
of an alignment widget. It is important to not set the fields of the
@code{GtkAlignment} structure directly (or, for that matter, any type
derived from @code{GtkObject}).
@end deftypefun

@gtkstdmacros{Alignment, ALIGNMENT}

@page
@node GtkArrow, GtkAspectFrame, GtkAlignment, Widgets
@comment node-name, next, previous, up
@section The arrow widget

@subsection Description

The arrow widget is derived from the misc widget (@pxref{GtkMisc}) and
is intended for use where a directional arrow (in one of the four
cardinal directions) is desired. As such, it has very limited
functionality and basically only draws itself in a particular direction
and with a particular shadow type. The arrow widget will expand to fill
all the space it is allocated.

@subsection Options

@defopt arrow_type
The @var{arrow_type} option specifies which direction the arrow will
point. It can be one of @code{GTK_ARROW_UP}, @code{GTK_ARROW_DOWN},
@code{GTK_ARROW_LEFT} or @code{GTK_ARROW_RIGHT}. This will set the arrow
pointing in the direction specified.
@end defopt

@defopt shadow_type
The @var{shadow_type} option specifies how to draw the shadow for the
arrow. Currently, only the @code{GTK_SHADOW_IN} and
@code{GTK_SHADOW_OUT} shadow types are supported for drawing
arrows. Other shadow types will cause nothing to be drawn.
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_arrow_get_type (void)
Returns the @code{GtkArrow} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_arrow_new (GtkArrowType @var{arrow_type}, GtkShadowType @var{shadow_type})
Create a new @code{GtkArrow} object and initialize it with the values
@var{arrow_type} and @var{shadow_type}. The new widget is returned as a
pointer to a @code{GtkWidget} object. @code{NULL} is returned on
failure.
@end deftypefun

@deftypefun void gtk_arrow_set (GtkArrow *@var{arrow}, GtkArrowType @var{arrow_type}, GtkShadowType @var{shadow_type})
Set the @var{arrow_type} and @var{shadow_type} options of an arrow
widget. It is important to not set the fields of the @code{GtkArrow}
structure directly (or, for that matter, any type derived from
@code{GtkObject}).
@end deftypefun

@gtkstdmacros{Arrow, ARROW}


@page
@node GtkAspectFrame, GtkBin, GtkArrow, Widgets
@comment node-name, next, previous, upa
@section The aspect frame widget

@subsection Description

Ensure that the child window has a specified aspect ratio or, if
obey_child, has the same aspect ratio as its requested size.  Derived
from @pxref{GtkFrame}).

@subsection Options

@defopt label
@end defopt

@defopt xalign
@end defopt

@defopt yalign
@end defopt

@defopt ratio
@end defopt

@defopt obey_child
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_aspect_frame_get_type (void)
Returns the @code{GtkAspectFrame} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_aspect_frame_new (gchar *@var{label}, gfloat @var{xalign}, gfloat @var{yalign}, gfloat @var{ratio}, gint @var{obey_child})
Create a new @code{GtkAspectFrame} object and initialize it with the values 
@var{label}, @var{xalign}, @var{yalign}, @var{ratio} and @var{obey_child}.
The new widget is returned as a pointer to a @code{GtkWidget} object. 
@code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_aspect_frame_set (GtkAspectFrame *@var{aspect_frame}, gfloat @var{xalign}, gfloat @var{yalign}, gfloat @var{ratio}, gint @var{obey_child})
@end deftypefun


@gtkstdmacros{AspectFrame, ASPECT_FRAME}

@page
@node GtkBin, GtkBox, GtkAspectFrame, Widgets
@comment node-name, next, previous, up
@section The bin widget

@subsection Description

The bin widget is a container (@pxref{GtkContainer}) derived from the
container widget. It is an abstract base class. That is, it is not
possible to create an actual bin widget. It exists only to provide a
base of functionality for other widgets. Specifically, the bin widget
provides a base for several other widgets that contain only a single
child. These widgets include alignments (@pxref{GtkAlignment}), frames
(@pxref{GtkFrame}), items (@pxref{GtkItem}), viewports
(@pxref{GtkViewport}) and windows (@pxref{GtkWindow})

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_bin_get_type (void)
Returns the @code{GtkBin} type identifier.
@end deftypefun

@gtkstdmacros{Bin, BIN}


@page
@node GtkBox, GtkButtonBox, GtkBin, Widgets
@comment node-name, next, previous, up
@section The box widget


@subsection Description

The box widget is a container (@pxref{GtkContainer}) derived from the
container widget. It is an abstract base class used by the horizontal
box (@pxref{GtkHBox}), the vertical box (@pxref{GtkVBox}) and the 
(@pxref{GtkButtonBox}) widgets to provide a base of common functionality.

A box provides an abstraction for organizing the position and size of
widgets. Widgets in a box are laid out horizontally or vertically. By
using a box widget appropriately, a programmer can control how widgets
are positioned and how they will be allocated space when a window gets
resized.

The key attribute of boxes is that they position their children in a
single row (horizontal boxes) or column (vertical boxes). In the case of
horizontal boxes, all children are stretched vertically. The vertical
size of the box is determined by the largest vertical requisition of all
of its children. Similarly, a vertical box stretches all of its children
horizontally. The horizontal size (of the vertical box) is determined by
the largest horizontal requisition of all of its children. An alignment
widget (@pxref{GtkAlignment}) can be used to control child allocation
more precisely on a per child basis.

The second attribute of boxes is how they expand children. In the case
of a horizontal box, the main control is over how children are expanded
horizontally to fill the allocated area. (The rest of this discussion
will focus on horizontal boxes but it applies to vertical boxes as
well).

There are two flags which can be set controlling how a widget is
expanded horizontally in a horizontal box. These are the @code{expand}
and @code{fill}. There operation is fairly simple. If @code{expand} is
set, the child's potentially allocated area will expand to fill available
space. If @code{fill} is set, the child's actual allocated area will be
its potentially allocated area. There is a difference between
the potentially area (which is the area the box widget sets aside for
the child) and the actual allocated area (which is the area the box
widget actual allocates for the widget via
@code{gtk_widget_size_allocate}).

The allocation of space to children occurs as follows (for horizontal
boxes):
@enumerate
@item
All children are allocated at least their requested size horizontally
and the maximum requested child size vertically.

@item
Any child with the @code{expand} flag set is allocated @code{extra_width
/ nexpand_children} extra pixels horizontally. If the @code{homogeneous}
flag was set, all children are considered to have the @code{expand} flag
set. That is, all children will be allocated the same area.The
horizontal box is a fair widget and, as such, divides up any extra
allocated space evenly among the ``expand'' children. (Those children
which have the @code{expand} flag set). The exception occurs when
@code{extra_width / nexpand_children} does not divide cleanly. The extra
space is given to the last widget.

@item
@code{spacing} number of pixels separate each child. Note: The
separation is between the potentially allocated area for each child and
not the actual allocated area. The @code{padding} value associated with
each child causes that many pixels to be left empty to each side of the
child.

@item
If a child has the @code{fill} flag set it is allocated its potentially
allocated area. If it does not, it is allocated its requested size
horizontally and centered within its potentially allocated area. Its
vertical allocation is still the maximum requested size of any child.

@item
Children placed at the start of the box are placed in order of addition
to the box from left to right in the boxes allocated area.. Children
placed at the end of the box are placed in order of addition from right
to left in the boxes allocated area.
@end enumerate

@xref{GtkHBox}, and @ref{GtkVBox}, for code examples of using horizontal
and vertical boxes.

@subsection Options

@defopt expand
@end defopt

@defopt fill
@end defopt

@defopt padding
@end defopt

@defopt expand
@end defopt

@c FIXME: options for GtkBox

@subsection Signals

@subsection Functions

@deftypefun guint gtk_box_get_type (void)
Returns the @code{GtkBox} type identifier.
@end deftypefun

@deftypefun void gtk_box_pack_start (GtkBox *@var{box}, GtkWidget *@var{child}, gint @var{expand}, gint @var{fill}, gint @var{padding})
Add @var{child} to the front of @var{box}. The flags @var{expand} and
@var{fill} and the padding value of @var{padding} are associated with
@var{child}.
@end deftypefun

@deftypefun void gtk_box_pack_end (GtkBox *@var{box}, GtkWidget *@var{child}, gint @var{expand}, gint @var{fill}, gint @var{padding})
Add @var{child} to the end of @var{box}. The flags @var{expand} and
@var{fill} and the padding value of @var{padding} are associated with
@var{child}.
@end deftypefun

@deftypefun void gtk_box_pack_start_defaults (GtkBox *@var{box}, GtkWidget *@var{widget})
A convenience function which is equivalent to the following:

@example
  gtk_box_pack_start (@var{box}, @var{widget}, TRUE, TRUE, 0);
@end example
@end deftypefun

@deftypefun void gtk_box_pack_end_defaults (GtkBox *@var{box}, GtkWidget *@var{widget})
A convenience function which is equivalent to the following:

@example
  gtk_box_pack_start (@var{box}, @var{widget}, TRUE, TRUE, 0);
@end example
@end deftypefun

@deftypefun void gtk_box_set_homogeneous (GtkBox *@var{box}, gint @var{homogeneous})
Set the homogeneous setting of this box to @var{homogeneous}.
@end deftypefun

@deftypefun void gtk_box_set_spacing (GtkBox *@var{box}, gint @var{spacing})
@end deftypefun

@deftypefun void gtk_box_reorder_child (GtkBox *@var{box}, GtkWidget *@var{child}, guint @var{pos})
@end deftypefun

@deftypefun void gtk_box_query_child_packing (GtkBox *@var{box}, GtkWidget *@var{child}, gint *@var{expand}, gint *@var{fill}, gint *@var{padding}, GtkPackType *@var{pack_type})
@end deftypefun

@deftypefun void gtk_box_set_child_packing (GtkBox *@var{box}, GtkWidget *@var{child}, gint @var{expand}, gint @var{fill}, gint @var{padding}, GtkPackType *@var{pack_type})
@end deftypefun

@gtkstdmacros{Box, BOX}


@page
@node GtkButtonBox, GtkButton, GtkBox, Widgets
@comment node-name, next, previous, up
@section The button box widget

@subsection Description
The button box widget is a container (@pxref{GtkContainer}) derived from the
(@pxref{GtkBox}) widget. It is an abstract base class used by the horizontal
button box (@pxref{GtkHButtonBox}) and the vertical button box 
(@pxref{GtkVButtonBox}) widgets to provide a base of common functionality.

The button box, like the box widget, (@pxref{GtkBox}) provides an abstraction
for organizing position and size of widgets. In the case of the button box
it is targeted at the button widget,(@pxref{GtkButton}). Button widgets are
laid out in the box horizontally or vertically. By using a button box widget 
appropriately, a programmer can control how the button widgets are positioned
and how they will be allocated space when a window gets resized.
 
@subsection Options
@defopt layout_style
@itemize @bullet
@itemize @bullet
@item 
@code{GTK_BUTTONBOX_SPREAD}
@end itemize

@item
The layout style @code{GTK_BUTTONBOX_SPREAD} will spread the buttons out
evenly within the button box. When the parent window is resized they will
re-adjust to the new window dimensions. The @code{gtk_button_box_set_spacing}
function will set the minimum space that the buttons will leave between
themselves.

@itemize @bullet
@item
@code{GTK_BUTTONBOX_EDGE}
@end itemize
@item

@itemize @bullet
@item
@code{GTK_BUTTONBOX_START}
@end itemize

@item
The layout style @code{GTK_BUTTONBOX_START} will place the buttons at the
start of the button box, taking into account the spacing as set by the
@code{gtk_button_box_set_spacing} function. The buttons will not move
when the parent window is re-sized. 

@itemize @bullet
@item
@code{GTK_BUTTONBOX_END}
@end itemize

@item
The layout style @code{GTK_BUTTONBOX_END} will place the buttons at the
end of the button box, taking into account the spacing as set by the
@code{gtk_button_box_set_spacing} function. Again like the
@code{GTK_BUTTONBOX_START} layout style the buttons will not move when
the parent window is re-sized.
@end itemize
@end defopt

@defopt width
@end defopt

@defopt height
@end defopt

@defopt ipad_x
@defoptx ipad_y
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_button_box_get_type (void)
Returns the @code{GtkButtonBox} type identifier.
@end deftypefun

@deftypefun void gtk_button_box_set_child_size_default (gint @var{width}, gint@var{height})
@end deftypefun

@deftypefun void gtk_button_box_set_child_ipadding_default (gint @var{ipad_x}, gint @var{ipad_y})
@end deftypefun

@deftypefun void gtk_button_box_get_child_size_default (gint *@var{width}, gint *@var{height})
@end deftypefun

@deftypefun void gtk_button_box_get_child_ipadding_default (gint *@var{ipad_x}, gint *@var{ipad_y})
@end deftypefun

@deftypefun void gtk_button_box_set_child_size (GtkButtonBox *@var{widget}, gint @var{width}, gint @var{height})
@end deftypefun

@deftypefun void gtk_button_box_set_child_ipadding (GtkButtonBox *@var{widget}, gint @var{ipad_x}, gint @var{ipad_y})
@end deftypefun

@deftypefun void gtk_button_box_set_layout (GtkButtonBox *@var{widget}, gint @var{layout_style})
This will set the layout style of the buttons within this box. Currently it can
be set to one of @code{GTK_BUTTONBOX_SPREAD}, @code{GTK_BUTTONBOX_EDGE}, 
@code{GTK_BUTTONBOX_START} or @code{GTK_BUTTONBOX_END}.

The following example:
@example
    gtk_button_box_set_layout (GTK_BUTTON_BOX (box), 
                               GTK_BUTTONBOX_SPREAD);
@end example
Will set the @var{box} argument to the @dfn{SPREAD} layout style described 
above.
@end deftypefun

@deftypefun gint gtk_button_box_get_spacing (GtkButtonBox *@var{widget})
Get the per widget value for spacing within the button box. This value is
the amount of space that will be between the individual buttons contained by
this box.
@end deftypefun

@deftypefun void gtk_button_box_get_child_size (GtkButtonBox *@var{widget}, gint *@var{width}, gint *@var{height})
@end deftypefun

@deftypefun void gtk_button_box_get_child_ipadding (GtkButtonBox *@var{widget}, gint *@var{ipad_x}, gint *@var{ipad_y})
Get the per widget value for the padding inside the buttons. This value 
controls how large the buttons will be within the box.
@end deftypefun

@deftypefun gint gtk_button_box_get_layout (GtkButtonBox *@var{widget})
Get the @var{layout_style} for the @code{GtkButtonBox} object passed to this
function in the @var{widget} variable.

@example
   layout = gtk_button_box_get_layout(GTK_BUTTON_BOX (box));
@end example

@end deftypefun

@gtkstdmacros{ButtonBox, BUTTON_BOX}

@page
@node GtkButton, GtkCheckButton, GtkButtonBox, Widgets
@comment node-name, next, previous, up
@section The button widget


@subsection Description

A pressable button.  Contains a widget.  Changes its appearance
(hilites) when it gets the focus.  Changes its appearance (pressed) when
activated.  Derived from @pxref{GtkContainer}.

@subsection Signals

@deftypefn Signal void GtkButton::pressed (GtkButton *@var{button})
@end deftypefn

@deftypefn Signal void GtkButton::released (GtkButton *@var{button})
@end deftypefn

@deftypefn Signal void GtkButton::clicked (GtkButton *@var{button})
@end deftypefn

@deftypefn Signal void GtkButton::enter (GtkButton *@var{button})
@end deftypefn

@deftypefn Signal void GtkButton::leave (GtkButton *@var{button})
@end deftypefn

@subsection Functions

@deftypefun guint gtk_button_get_type (void)
Returns the @code{GtkButton} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_button_new (void)
Create a new @code{GtkButton} object. The new widget is returned as a 
pointer to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun GtkWidget* gtk_button_new_with_label (gchar *@var{label})
Create a new @code{GtkButton} object and set the text that is 
on the button to @var{label}. The new widget is returned as a 
pointer to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_button_pressed (GtkButton *@var{button})
@end deftypefun

@deftypefun void gtk_button_released (GtkButton *@var{button})
@end deftypefun

@deftypefun void gtk_button_clicked (GtkButton *@var{button})
@end deftypefun

@deftypefun void gtk_button_enter (GtkButton *@var{button})
@end deftypefun

@deftypefun void gtk_button_leave (GtkButton *@var{button})
@end deftypefun

@gtkstdmacros{Button, BUTTON}


@page
@node GtkCheckButton, GtkCheckMenuItem, GtkButton, Widgets
@comment node-name, next, previous, up
@section The check button widget


@subsection Description

Another form of toggle button (@pxref{GtkToggleButton}) with an
indicator.  Contains a widget to the right of the indicator.  Changes
its appearance (hilites) when it gets the focus.

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_check_button_get_type (void)
Returns the @code{GtkCheckButton} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_check_button_new (void)
Create a new @code{GtkCheckButton} object and initialize it with the 
default values in the library. The new widget is returned as a pointer
to a @code{GtkWidget} object. A @code{NULL} is returned on failure.
@end deftypefun

@deftypefun GtkWidget* gtk_check_button_new_with_label (gchar *@var{label})
Create a new @code{GtkCheckButton} object and initialize it with the 
values @var{label}. The new widget is returned as a pointer to a
@code{GtkWidget} object. @code{NULL} is returned on any failure.
@end deftypefun

@deftypefun GtkCheckButton* GTK_CHECK_BUTTON (gpointer @var{obj})
@end deftypefun

@deftypefun GtkCheckButtonClass* GTK_CHECK_BUTTON_CLASS (gpointer @var{class})
@end deftypefun

@deftypefun gint GTK_IS_CHECK_BUTTON (gpointer @var{obj})
@end deftypefun

@gtkstdmacros{CheckButton, CHECK_BUTTON}

@page
@node GtkCheckMenuItem, GtkCList, GtkCheckButton, Widgets
@comment node-name, next, previous, up
@section The check menu item widget

@subsection Description

Derived from @pxref{GtkMenuItem}.  Very similar to a checkbutton
(@pxref{GtkCheckButton}), except that it's a menu item.  Has a toggled
state which is displayed in a small rectangle to the left of the
contained widget.

@subsection Options

@defopt label
@end defopt

@defopt state
@end defopt

@subsection Signals

@deftypefn Signal void GtkCheckMenuItem::toggled (GtkCheckMenuItem *@var{check_menu_item})
@end deftypefn

@subsection Functions

@deftypefun guint gtk_check_menu_item_get_type (void)
Returns the @code{GtkCheckMenuItem} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_check_menu_item_new (void)
Create a new @code{GtkCheckMenuItem} object. The new widget is returned as a
pointer to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun GtkWidget* gtk_check_menu_item_new_with_label (gchar *@var{label})
Create a new @code{GtkCheckMenuItem} object and initialize it with the values
@var{label}. The new widget is returned as a pointer to a @code{GtkWidget}
object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_check_menu_item_set_state (GtkCheckMenuItem *@var{check_menu_item}, gint @var{state})
@end deftypefun

@deftypefun void gtk_check_menu_item_toggled (GtkCheckMenuItem *@var{check_menu_item})
@end deftypefun

@gtkstdmacros{CheckMenuItem, CHECK_MENU_ITEM}

@page 
@node GtkCList, GtkColorSelection, GtkCheckMenuItem, Widgets
@comment node-name, next, previous, up
@section The compound list widget

@subsection Description

A list of rows of columns, with a title row.  You can insert rows, and
delete rows.  The user can scroll around and select a row.  Derived from
@pxref{GtkContainer}.  Cells can be empty, have a text and/or pixmap, or
be a widget.

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_clist_get_type (void)
Returns the @code{GtkCList} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_clist_new (int @var{columns})
Create a new @code{GtkCList} initializing it with the value @var{columns}. 
The new widget is returned as a pointer to a @code{GtkWidget} object.
@code{NULL} is returned on failure.
@end deftypefun


@deftypefun GtkWidget* gtk_clist_new_with_titles (int @var{columns}, gchar *@var{titles[]})
@end deftypefun

@deftypefun void gtk_clist_set_border (GtkCList *@var{clist}, GtkShadowType @var{border})
Set the border style of the @var{clist} to the shadow type @var{border}.
@end deftypefun

@deftypefun void gtk_clist_set_selection_mode (GtkCList *@var{clist} GtkSelectionMode @var{mode})
Set the selection mode on the @var{clist} to the @var{mode} selection mode.
@end deftypefun

@deftypefun void gtk_clist_set_policy (GtkCList *@var{clist}, GtkPolicyType @var{vscrollbar_policy}, GtkPolicyType @var{hscrollbar_policy})
Set the policy on the scrollbars on the @var{clist} to @var{vscrollbar_policy} and @var{hscrollbar_policy}.
@end deftypefun

@deftypefun void gtk_clist_freeze (GtkCList *@var{clist})
Stop all visual updates of the @var{clist}. Useful for when making a large
number of changes to a @code{GtkCList}.
@end deftypefun

@deftypefun void gtk_clist_thaw (GtkCList *@var{clist})
Allow all visual updates of the @var{clist} to resume. 
@end deftypefun

@deftypefun void gtk_clist_column_titles_show (GtkCList *@var{clist})
Show the column title buttons on the @var{clist}.
@end deftypefun

@deftypefun void gtk_clist_column_titles_hide (GtkCList *@var{clist})
Hide the column title buttons on the @var{clist}.
@end deftypefun

@deftypefun void gtk_clist_set_column_title (GtkCList *@var{clist}, gint @var{column}, gchar *@var{title})
Set the title in column @var{column} of the @var{clist} button to @var{title}.
@end deftypefun

@deftypefun void gtk_clist_set_column_widget (GtkCList *@var{clist}, gint @var{column}, GtkWidget *@var{widget})
Set the @var{widget} instead of the title button for the column @var{column} 
in the @var{clist}.
@end deftypefun

@deftypefun void gtk_clist_set_column_justification (GtkCList *@var{clist}, gint @var{column}, GtkJustification @var{justification})
Set the @var{column}'s justification, in the @var{clist} to @var{justification}.
@end deftypefun

@deftypefun void gtk_clist_set_column_width (GtkCList *@var{clist}, gint @var{column}, gint @var{width})
Set the pixel width of column @var{column} in the @code{GtkCList} @var{clist}
to @var{width}. This function is a necessary step in creating a 
@code{GtkCList} because otherwise the column width is chosen from the width
of the column title, which is almost never correct.
@end deftypefun

@deftypefun void gtk_clist_set_row_height (GtkCList *@var{clist}, gint @var{height})
Change the height of the rows in the @var{clist} to @var{height}. The default
is the height of the current font.
@end deftypefun

@deftypefun void gtk_clist_moveto (GtkCList *@var{clist}, gint @var{row}, gint@var{column}, gfloat @var{row_align}, gfloat @var{col_align})
Scroll the viewing area of the @code{GtkClist} in @var{clist} to @var{column}
and @var{row}. The @var{row_align} and @var{col_align} are between zero and
one, representing the location the row should appear on screen. Setting 
@var{row_align} or the @var{col_align} to 0.0 will be the top or left of the
viewing area. Setting the @var{row_align} or @var{col_align} to 1.0 will
be the bottom or right of the viewing area. If the @var{row} or @var{column}
is -1 then there is no change.
@end deftypefun

@deftypefun void gtk_clist_set_text (GtkCList *@var{clist}, gint @var{row}, gint @var{column}, gchar *@var{text})
Set a given cell's text, located by the @var{row} and @var{column}, to 
@var{text} replacing its current contents.
@end deftypefun

@deftypefun void gtk_clist_set_pixmap (GtkCList *@var{clist}, gint @var{row}, gint @var{column}, GdkPixmap *@var{pixmap}, GdkBitmap *@var{mask})
Set a given cell's text, located by the @var{column} and @var{row} arguments,
to the pixmap described by the @var{pixmap} argument using the @var{mask} as 
its mask. The current contents of the cell will be replaced.
@end deftypefun

@deftypefun void gtk_clist_setpixtext (GtkCList *@var{clist}, gint @var{row}, gint @var{column}, gchar *@var{text}, guint8 @var{spacing}, GdkPixmap *@var{pixmap}, GdkBitmap *@var{mask})
Set a given cell's text and pixmap, located by the @var{row} and @var{column}
arguments, to the text and pixmap described by the @var{pixmap} and @var{text}
arguments. The @var{mask} will be used for the pixmap mask and the 
@var{spacing} argument specifies the spacing between the two.
@end deftypefun

@deftypefun void gtk_clist_set_foreground (GtkCList *@var{clist}, gint @var{row}, GdkColor *@var{color})
Set the foreground color of row @var{row} to @var{color} in the 
@code{GtkCList} @var{clist}. The @var{color} must
already be allocated.
@end deftypefun

@deftypefun void gtk_clist_set_background (GtkCList *@var{clist}, gint @var{row}, GdkColor *@var{color})
Set the background color of row @var{row} to @var{color} in the 
@code{GtkCList} pointed to by @var{clist}. The color must be previously
allocated.
@end deftypefun

@deftypefun void gtk_clist_set_shift (GtkCList *@var{clist}, gint @var{row}, gint @var{column}, gint @var{vertical}, gint @var{horizontal})
Set the horizontal and vertical shift for drawing the contents of the cell
located at @var{row} and @var{column}. The @var{vertical} and @var{horizontal}
arguments can be positive or negative. 
@end deftypefun

@deftypefun gint gtk_clist_append (GtkCList *@var{clist}, gchar *@var{text[]})
Append the given text, in the @var{text[]} argument,  to the @code{GtkCList} 
pointed to by the @var{clist}. The return value is the index of the row that
was just added.
@end deftypefun

@deftypefun void gtk_clist_insert (GtkCList *@var{clist}, gint @var{row}, gchar *@var{text[]})
Insert a row into the @code{GtkCList} pointed to by @var{clist} at row 
@var{row} with the text in @var{text[]}.
@end deftypefun

@deftypefun void gtk_clist_remove (GtkCList *@var{clist}, gint @var{row})
Remove row index @var{row} from the @var{clist}.
@end deftypefun

@deftypefun void gtk_clist_set_row_data (GtkCList *@var{clist}, gint @var{row}, gpointer @var{data})
Will set an arbitrary data pointer, @var{data}, for row @var{row} in the
@code{GtkCList} pointed to by @var{clist}.
@end deftypefun

@deftypefun gpointer gtk_clist_get_row_data (GtkCList *@var{clist}, gint @var{row})
Return the data that was set for row @var{row} from the @code{GtkCList} pointed
to by @var{clist}. @code{NULL} is returned if no data was set.
@end deftypefun

@deftypefun void gtk_clist_select_row (GtkCList *@var{clist}, gint @var{row}, gint @var{column})
Force selection of a row, located by @var{row} and @var{column}, in the 
@code{GtkCList} pointed to by @var{clist}.
@end deftypefun

@deftypefun void gtk_clist_unselect_row (GtkCList *@var{clist}, gint @var{row}, gint @var{column})
Force the unselection of a row, located by @var{row} and @var{column}, in the
@code{GtkCList} pointed to by @var{clist}.
@end deftypefun

@deftypefun void gtk_clist_clear (GtkCList *@var{clist})
Clear the entire contents of the @code{GtkCList} pointed to by @var{clist}.
This is much faster then removing each item separately with 
@code{gtk_clist_remove}.
@end deftypefun

@gtkstdmacros{CList, CLIST}

@page
@node GtkColorSelection, GtkCombo, GtkCList, Widgets
@comment node-name, next, previous, up
@section The color selector widget

@subsection Description

A widget that allows a user to pick a color in one of many ways.  They
can click on a color wheel or saturation bar.  They can change hue,
saturation, value, red, green, or blue with a slider, or by entering
values.  Also allows the user to set an alpha (opacity) value.  Derived
from @pxref{GtkVBox}.

@subsection Options
@defopt policy
@itemize @bullet
@item
GTK_UPDATE_CONTINUOUS
@item
GTK_UPDATE_DISCONTINUOUS
@item
GTK_UPDATE_DELAYED
@end itemize
@end defopt

@defopt color
@end defopt

@defopt use_opacity
@end defopt

@defopt title
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_color_selection_get_type (void)
Returns the @code{GtkColorSelection} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_color_selection_new (void)
Create a new @code{GtkColorSelection} object. The new object is returned as a
pointer to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_color_selection_set_update_policy (GtkColorSelection *@var{colorsel}, GtkUpdateType @var{policy})
@end deftypefun

@deftypefun void gtk_color_selection_set_color (GtkColorSelection *@var{colorsel}, gdouble *@var{color})
@end deftypefun

@deftypefun void gtk_color_selection_get_color (GtkColorSelection *@var{colorsel}, gdouble *@var{color})
@end deftypefun

@deftypefun void gtk_color_selection_set_opacity (GtkColorSelection *@var{colorsel}, gint @var{use_opacity})
@end deftypefun

@deftypefun guint gtk_color_selection_dialog_get_type (void)
Returns the @code{GtkColorSelection} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_color_selection_dialog_new (gchar *@var{title})
Create a new @code{GtkColorSelection} object initializing the title bar of 
the resulting dialog to @var{title}. The new widget is returned as a pointer
to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@gtkstdmacros{ColorSelection, COLOR_SELECTION}

@page
@node GtkCombo, GtkContainer, GtkColorSelection, Widgets
@comment node-name, next, previous, up
@section The combo widget

@subsection Description

Text input box which also lets you choose from pre-defined values from a
drop-down menu.  Derived from @pxref{GtkHBox}.

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_combo_get_type (void)
Returns the @code{GtkCombo} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_combo_new (void)
Create a new @code{GtkCombo} object returning the new widget as a pointer to
a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_combo_set_value_in_list (GtkCombo *@var{combo}, gint @var{val}, gint @var{ok_if_empty})
@end deftypefun

@deftypefun void gtk_combo_set_use_arrows (GtkCombo *@var{combo}, gint @var{val})
@end deftypefun

@deftypefun void gtk_combo_set_use_arrows_always (GtkCombo *@var{combo}, gint @var{val})
@end deftypefun

@deftypefun void gtk_combo_set_case_sensitive (GtkCombo *@var{combo}, gint @var{val})
@end deftypefun

@deftypefun void gtk_combo_set_item_string (GtkCombo *@var{combo}, GtkItem *@var{item}, gchar *@var{item_value})
@end deftypefun

@deftypefun void gtk_combo_set_popdown_strings (GtkCombo *@var{combo}, GList *@var{strings})
@end deftypefun

@gtkstdmacros{Combo, COMBO}

@page
@node GtkContainer, GtkCTree, GtkCombo, Widgets
@comment node-name, next, previous, up
@section The container widget

@subsection Description

A base class for objects that are built out of other widgets.  Many
widgets are containers.  For example, a button contains a widget.  That
widget might be a text label (usually is), or a pixmap, or even an hbox
which has a label and a pixmap.

@subsection Options

@defopt border_width
@end defopt

@subsection Signals

@deftypefn Signal void GtkContainer::add (GtkContainer *@var{container}, GtkWidget *@var{widget})
@end deftypefn

@deftypefn Signal void GtkContainer::remove (GtkContainer *@var{container}, GtkWidget *@var{widget})
@end deftypefn

@deftypefn Signal void GtkContainer::need_resize (GtkContainer *@var{container}, GtkWidget *@var{widget})
@end deftypefn

@deftypefn Signal void GtkContainer::foreach (GtkContainer *@var{container}, GtkCallback @var{callback}, gpointer @var{callback_data})
@end deftypefn

@deftypefn Signal gint GtkContainer::focus (GtkContainer *@var{container}, GtkDirectionType @var{direction})
@end deftypefn

@subsection Functions

@deftypefun guint gtk_container_get_type (void)
Returns the @code{GtkContainer} type identifier.
@end deftypefun

@deftypefun void gtk_container_border_width (GtkContainer *@var{container}, gint @var{border_width})
@end deftypefun

@deftypefun void gtk_container_add (GtkContainer *@var{container}, GtkWidget *@var{widget})
Add @var{widget} to the @var{container}.
@end deftypefun

@deftypefun void gtk_container_remove (GtkContainer *@var{container}, GtkWidget *@var{widget})
Remove @var{widget} from @var{container}.
@end deftypefun

@deftypefun void gtk_container_disable_resize (GtkContainer *@var{container})
@end deftypefun

@deftypefun void gtk_container_enable_resize (GtkContainer *@var{container})
@end deftypefun

@deftypefun void gtk_container_block_resize (GtkContainer *@var{container})
@end deftypefun

@deftypefun void gtk_container_unblock_resize (GtkContainer *@var{container})
@end deftypefun

@deftypefun gint gtk_container_need_resize (GtkContainer *@var{container}, GtkWidget *@var{widget})
@end deftypefun

@deftypefun void gtk_container_check_resize (GtkContainer *@var{container}, GtkWidget *@var{widget})
@end deftypefun

@deftypefun void gtk_container_foreach (GtkContainer *@var{container}, GtkCallback @var{callback}, gpointer @var{callback_data})
@end deftypefun

@deftypefun void gtk_container_focus (GtkContainer *@var{container}, GtkDirectionType @var{direction})
@end deftypefun

@deftypefun GList* gtk_container_children (GtkContainer @var{container})
@end deftypefun

@gtkstdmacros{Container, CONTAINER}

@page 
@node GtkCTree, GtkCurve, GtkContainer, Widgets
@comment node-name, next, previous, up
@section The multi-column tree widget

@subsection Description

The GtkCTree widget is a multi-columned list with a designated column, the 
@code{tree column}, to display hierarchically-organized data. Each node is
either a folder (a branch of the tree) or a leaf. Nodes can be
(recursively) expanded, collapsed, (un)selected, removed, moved, sorted etc. 

GtkCTree is a descendant of @pxref{GtkCList}. Therefore, a cell in a column
other than the tree column can only contain a string, a pixmap, both or 
nothing. A node in the tree column can contain a string and up to two pixmaps
and masks, indicating the "folder openend" and "folder closed" status.

Compared to GtkCList, there is no concept of row numbers. Therefore, a number
of GtkCList methods had to be re-implemented taking @code{GList *node} 
arguments instead of @code{gint row}.

@subsection Options

@subsection Signals

@deftypefn Signal void GtkCTree::tree_expand (GtkCTree *@var{ctree}, GList *@var{node})
@end deftypefn
@deftypefn Signal void GtkCTree::tree_collapse (GtkCTree *@var{ctree}, GList *@var{node})
@end deftypefn
@deftypefn Signal void GtkCTree::tree_move (GtkCTree *@var{ctree}, GList *@var{node}, GList *@var{new_parent}, GList *@var{new_sibling})
@end deftypefn
@deftypefn Signal void GtkCTree::tree_select_row (GtkCTree *@var{ctree}, GList *@var{row}, gint @var{column})
@end deftypefn
@deftypefn Signal void GtkCTree::tree_unselect_row (GtkCTree *@var{ctree}, GList *@var{row}, gint @var{column})
@end deftypefn

@subsection Functions

@deftypefun GtkType gtk_ctree_get_type (void)
Returns the @code{GtkCTree} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_ctree_new (gint @var{columns}, gint @var{tree_column})
Creates a new GtkCTree widget with the given number of columns and the given tree column.

On success, a pointer to the newly created widget is returned, and @code{NULL} otherwise.
@end deftypefun

@deftypefun GtkWidget* gtk_ctree_new_with_titles (gint @var{columns}, gint @var{tree_column}, gchar *@var{titles[]})
Creates a new GtkCTree widget with the given number of columns and the given tree column. The column titles are initialized to the strings of the array @var{titles}.

On success, a pointer to the newly created widget is returned, and @code{NULL} otherwise.
@end deftypefun

@deftypefun GList* gtk_ctree_insert (GtkCTree *@var{ctree}, GList *@var{parent}, GList *@var{sibling}, gchar *@var{text[]}, guint8 @var{spacing}, GdkPixmap *@var{pixmap_closed}, GdkPixmap *@var{mask_closed}, GdkPixmap *@var{pixmap_opened}, GdkPixmap *@var{mask_opened}, gboolean @var{is_leaf}, gboolean @var{expanded})
Inserts a new node at the given position. If @var{parent} == NULL, the node is
inserted at root level. If @var{sibling} == NULL, the node is appended to the 
existing list of siblings. Otherwise, the node is inserted before @var{sibling}.
If not NULL, the two pixmaps/masks are used to indicate the opened/closed status
of the node. @var{spacing} is the number of pixels between pixmap and text.
If @var{is_leaf} == TRUE, the node cannot have any children.
The initial expanded/collapsed status is given by @var{expanded}.

On success, the pointer to the newly inserted node is returned, and NULL 
otherwise.
@end deftypefun

@deftypefun void gtk_ctree_remove (GtkCTree *@var{ctree}, GList *@var{node})
Removes the given node and all its children.
@end deftypefun

@deftypefun void gtk_ctree_clear (GtkCTree *@var{ctree})
Removes all nodes of @var{ctree}.
@end deftypefun

@deftypefun void gtk_ctree_post_recursive (GtkCTree *@var{ctree}, GList *@var{node}, GtkCTreeFunc @var{func}, gpointer @var{data})
Apply @var{func} to @var{node} and all its children, traversing @var{ctree} in
post-order.
@end deftypefun

@deftypefun void gtk_ctree_pre_recursive (GtkCTree *@var{ctree}, GList *@var{node}, GtkCTreeFunc @var{func}, gpointer @var{data})
Apply @var{func} to @var{node} and all its children, traversing @var{ctree} in
pre-order.
@end deftypefun

@deftypefun gboolean gtk_ctree_is_visible (GtkCTree *@var{ctree}, GList *@var{node})
Returns the visibility status of the given node. A node is said to be visible
if in the chain of parent nodes every node is expanded. Or : the node is 
currently being displayed (but not necessarily inside the viewing area).
@end deftypefun

@c @deftypefun void gtk_ctree_scroll_to (GtkCTree *@var{ctree}, gint @var{row}, gint@var{column}, gfloat @var{row_align}, gfloat @var{col_align})
@c Scroll the viewing area of the @code{GtkCtree} in @var{ctree} to @var{column}
@c and @var{row}. The @var{row_align} and @var{col_align} are between zero and
@c one, representing the location the row should appear on screen. Setting 
@c @var{row_align} or the @var{col_align} to 0.0 will be the top or left of the
@c viewing area. Setting the @var{row_align} or @var{col_align} to 1.0 will
@c be the bottom or right of the viewing area. If the @var{row} or @var{column}
@c is -1 then there is no change.
@c @end deftypefun

@gtkstdmacros{CTree, CTREE}

@page
@node GtkCurve, GtkGammaCurve, GtkCTree, Widgets
@comment node-name, next, previous, up
@section The curve widget

@subsection Description

Derived from @pxref{GtkDrawingArea}.

@subsection Options

@defopt type
@itemize @bullet
@item GTK_CURVE_TYPE_LINEAR
@item GTK_CURVE_TYPE_SPLINE
@item GTK_CURVE_TYPE_FREE
@end itemize
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_curve_get_type (void)
Returns the @code{GtkCurve} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_curve_new (void)
Create a new @code{GtkCurve} returning the new widget as a pointer to a 
@code{GtkWidget} object.
@end deftypefun

@deftypefun void gtk_curve_reset (GtkCurve *@var{curve})
@end deftypefun

@deftypefun void gtk_curve_set_gamma (GtkCurve *@var{curve}, gfloat @var{gamma})
@end deftypefun

@deftypefun void gtk_curve_set_range (GtkCurve *@var{curve}, gfloat @var{min_x}, gfloat @var{max_x}, gfloat @var{min_y}, gfloat @var{max_y})
@end deftypefun

@deftypefun void gtk_curve_get_vector (GtkCurve *@var{curve}, int @var{veclen}, gfloat @var{vector[]})
@end deftypefun

@deftypefun void gtk_curve_set_vector (GtkCurve *@var{curve}, int @var{veclen}, gfloat @var{vector[]})
@end deftypefun

@deftypefun void gtk_curve_set_curve_type (GtkCurve *@var{curve}, GtkCurveType @var{type})
@end deftypefun

@gtkstdmacros{Curve, CURVE}

@page
@node GtkGammaCurve, GtkDialog, GtkCurve, Widgets
@comment node-name, next, previous, up
@section The gamma curve widget

@subsection Description

Lets the user edit a gamma curve (a one-to-one mapping usually used to
adjust the intensity of an image to the physical characteristics of the
output device).  You can set the minimum and maximum values for input
and output.  You can set the initial vector as well.  You are guaranteed
that every input value will have a (not necessarily unique) output value
specified.  Derived from @pxref{GtkVBox}.  Makes use of @pxref{GtkCurve} to
draw the curve.

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_gamma_curve_get_type (void)
Returns the @code{GtkGamma} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_gamma_curve_new (void)
Create a new @code{GtkGamma} returning the new widget as a pointer to a
@code{GtkWidget} object.
@end deftypefun

@gtkstdmacros{GammaCurve, GAMMACURVE}

@page
@node GtkDialog, GtkDrawingArea, GtkGammaCurve, Widgets
@comment node-name, next, previous, up
@section The dialog widget


@subsection Description
The dialog widget is a window (@pxref{GtkWindow}) that has a vertical box
(@pxref{GtkVBox}), a horizontal box (@pxref{GtkHBox}), separated with a 
horizontal separator (@pxref{GtkHSeparator}).

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_dialog_get_type (void)
Returns the @code{GtkDialog} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_dialog_new (void)
Create a new @code{GtkDialog} object and return the new widget as a pointer
to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@gtkstdmacros{Dialog, DIALOG}


@page
@node GtkDrawingArea, GtkEntry, GtkDialog, Widgets
@comment node-name, next, previous, up
@section The drawing area widget

@subsection Description

A base class for widgets that need a box to draw into.  So far, only
used by GtkCurve.

@subsection Options

@defopt width
@end defopt

@defopt height
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_drawing_area_get_type (void)
Returns the @code{GtkDrawingArea} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_drawing_area_new (void)
Create a new @code{GtkDrawingArea} object returning the new widget as a 
pointer to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_drawing_area_size (GtkDrawingArea *@var{darea}, gint @var{width}, gint @var{height})
Set the size of the @var{darea} widget, created previously, to @var{width} and @var{height}.
@end deftypefun

@gtkstdmacros{DrawingArea, DRAWING_AREA}


@page
@node GtkEntry, GtkEventBox, GtkDrawingArea, Widgets
@comment node-name, next, previous, up
@section The entry widget


@subsection Description

@comment Enter text into this widget.  Derived from @pxref{GtkEditable}.  Can be
@comment set so it isn't editable.

Enter text into this widget.  Derived from GtkEditable.  Can be
set so it isn't editable.

@subsection Options

@defopt max
With this option it is possible to set the @var{text_max_length} to the 
value specified in the @var{max} option. This value is a guint16 value.
@end defopt

@defopt text
With this option it is possible to 'preload' the text that will be displayed 
in the @code{entry} widget to the string pointed to by @var{text}.
@end defopt

@subsection Signals

@deftypefn Signal void GtkEntry::insert_text (GtkEntry *@var{entry}, gchar *@var{text}, gint @var{length}, gint *@var{position})
@end deftypefn

@deftypefn Signal void GtkEntry::delete_text (GtkEntry *@var{entry}, gint @var{start_pos}, gint @var{end_pos})
@end deftypefn

@deftypefn Signal void GtkEntry::changed (GtkEntry *@var{entry})
@end deftypefn

@deftypefn Signal void GtkEntry::set_text (GtkEntry *@var{entry})
@end deftypefn

@deftypefn Signal void GtkEntry::activate (GtkEntry *@var{entry})
@end deftypefn 

@subsection Functions

@deftypefun guint gtk_entry_get_type (void)
Returns the @code{GtkEntry} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_entry_new (void)
Create a new @code{GtkEntry} object. The new widget is returned 
as a pointer to a @code{GtkWidget} object. @code{NULL} is returned on
failure.
@end deftypefun

@deftypefun GtkWidget* gtk_entry_new_with_max_length (guint16 @var{max})
Create a new @code{GtkEntry} object initializing it with the value @var{max}.
The new widget is returned as a pointer to a @code{GtkWidget} object. 
@code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_entry_set_text (GtkEntry *@var{entry}, gchar *@var{text})
Will set the text in the previously created @code{GtkEntry} object to 
@var{text}. It is important to not set the fields of the @code{GtkEntry}
structure directly (or, for that matter, any type derived from 
@code{GtkObject}).
@end deftypefun

@deftypefun void gtk_entry_append_text (GtkEntry *@var{entry}, gchar *@var{text})
Append the text that is in the @var{text} argument to the widgets text. It is
important to not set the fields of the @code{GtkEntry} structure directly.
@end deftypefun

@deftypefun void gtk_entry_prepend_text (GtkEntry *@var{entry}, gchar *@var{text})
Add the text in the @var{text} argument to the text in the @code{GtkEntry} 
widget. It is important to not set the fields of the @code{GtkEntry} structure
directly.
@end deftypefun

@deftypefun void gtk_entry_set_position (GtkEntry *@var{entry}, gint @var{position})
@end deftypefun

@deftypefun void gtk_entry_set_visibility (GtkEntry *@var{entry}, gint @var{visible})
Will make the keystrokes entered into the @code{GtkEntry} object invisible
when @var{visible} is @code{TRUE}. Defaults to @code{FALSE}.
@end deftypefun

@deftypefun gchar* gtk_entry_get_text (GtkEntry *@var{entry})
Returns the text that is contained in the @code{GtkEntry} as a pointer to a 
@code{gchar} variable.
@end deftypefun

@gtkstdmacros{Entry, ENTRY}

@page
@node GtkEventBox, GtkFileSelection, GtkEntry, Widgets
@comment node-name, next, previous, up
@section The event box widget

@subsection Description

Derived from @pxref{GtkBin}.  Used by @pxref{GtkTreeItem}.

@subsection Options

@subsection Signals

@subsection Functions
@deftypefun guint gtk_event_box_get_type (void)
Returns the @code{GtkEventBox} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_event_box_new (void)
Create a new @code{GtkEventBox} returning the new widget as a pointer to
a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@gtkstdmacros{GtkEventBox, EVENT_BOX}

@page
@node GtkFileSelection, GtkFixed, GtkEventBox, Widgets
@comment node-name, next, previous, up
@section The file selection dialog widget

@subsection Description

@subsection Options

@defopt title
@end defopt

@defopt filename
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_file_selection_get_type (void)
Returns the @code{GtkFileSelection} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_file_selection_new (gchar *@var{title})
Create a new @code{GtkFileSelection} object and return the new widget as a
pointer to a @code{GtkWidget}. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_file_selection_set_filename (GtkFileSelection *@var{filesel}, gchar *@var{filename})
@end deftypefun

@deftypefun gchar* gtk_file_selection_get_filename (GtkFileSelection *@var{filesel})
@end deftypefun

@gtkstdmacros{FileSelection, FILE_SELECTION}

@page
@node GtkFixed, GtkFrame, GtkFileSelection, Widgets
@comment node-name, next, previous, up
@section The fixed widget

@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_fixed_get_type (void)
Returns the @code{GtkFixed} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_fixed_new (void)
Create a new @code{GtkFixed} object returning the new widget as a pointer to 
a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_fixed_put_new (GtkFixed *@var{fixed}, GtkWidget *@var{widget}, gint16 @var{x}, gint16 @var{y})
@end deftypefun

@deftypefun void gtk_fixed_move (GtkFixed *@var{fixed}, GtkWidget *@var{widget}, gint16 @var{x}, gint16 @var{y})
@end deftypefun

@gtkstdmacros{Fixed, FIXED}

@page
@node GtkFrame, GtkGamma, GtkFixed, Widgets
@comment node-name, next, previous, up
@section The frame widget


@subsection Options
@defopt label
@end defopt

@defopt xalign
@end defopt

@defopt yalign
@end defopt

@defopt type
@end defopt

@subsection Description

@subsection Signals

@subsection Functions

@deftypefun guint gtk_frame_get_type (void)
Returns the @code{GtkFrame} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_frame_new (gchar *@var{label})
Create a new @code{GtkFrame} object initializing it with the value in 
@var{label}. The new widget is returned as a pointer to a @code{GtkWidget}
object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_frame_set_label (GtkFrame *@var{frame}, gchar *@var{label})
@end deftypefun

@deftypefun void gtk_frame_set_label_align (GtkFrame *@var{frame}, gfloat @var{xalign}, gfloat @var{yalign})
@end deftypefun

@deftypefun void gtk_frame_set_shadow_type (GtkFrame *@var{frame}, GtkShadowType @var{type})
@end deftypefun

@gtkstdmacros{Frame, FRAME}

@page
@node GtkGamma, GtkHBox, GtkFrame, Widgets
@comment node-name, next, previous, up
@section The gamma widget

@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_gamma_curve_get_type (void)
Returns the @code{GtkGamma} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_gamma_curve_new (void)
Create a new @code{GtkGamma} object returning the new widget as a pointer 
to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@gtkstdmacros{Gamma, GAMMA}

@page
@node GtkHBox, GtkHButtonBox, GtkGamma, Widgets
@comment node-name, next, previous, up
@section The horizontal box widget


@subsection Description

@subsection Options

@defopt homogeneous
This option controls whether each object in the box has the same size. In the
case of the @code{GtkHBox}, this effects the width. If this option is set then
the @var{expand} option to the @code{gtk_box_pack} (@pxref{GtkBox}) routines
is always set to @code{TRUE}.
@end defopt

@defopt spacing
This option controls the amount of space that is added between the objects
packed into this @code{GtkVBox} object.
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_hbox_get_type (void)
Returns the @code{GtkHBox} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_hbox_new (gint @var{homogeneous}, gint @var{spacing})
Create a new @code{GtkHBox} object initializing it with the values in 
@var{homogeneous} and @var{spacing}. The new widget is returned as a pointer 
to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@gtkstdmacros{HBox, HBOX}

@page
@node GtkHButtonBox, GtkHPaned, GtkHBox, Widgets
@comment node-name, next, previous, up
@section The horizontal button box widget

@subsection Description

@subsection Options

@defopt spacing
@end defopt

@defopt layout
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_hbutton_box_get_type (void)
Returns the @code{GtkHButtonBox} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_hbutton_box_new (void)
Create a new @code{GtkHButtonBox} object returning the new widget as a pointer
to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_hbutton_box_set_spacing_default (gint @var{spacing})
@end deftypefun

@deftypefun void gtk_hbutton_box_set_layout_default (gint @var{layout})
@end deftypefun

@deftypefun gint gtk_hbutton_box_get_spacing_default (void)
@end deftypefun

@deftypefun gint gtk_hbutton_box_get_layout_default (void)
@end deftypefun

@gtkstdmacros {HButtonBox, HBUTTON_BOX}

@page
@node GtkHPaned, GtkHRuler, GtkHButtonBox, Widgets
@comment node-name, next, previous, up
@section The horizontal paned widget

@subsection Description 

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun void gtk_hpaned_get_type (void)
Returns the @code{GtkHPaned} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_hpaned_new (void)
Create a new @code{GtkHPaned} object returning the new widget as a pointer 
to a @code{GtkWidget} object.
@end deftypefun

@gtkstdmacros{HPaned, HPANED}

@page
@node GtkHRuler, GtkHScale, GtkHPaned, Widgets
@comment node-name, next, previous, up
@section The horizontal ruler widget


@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_hruler_get_type (void)
Returns the @code{GtkHRuler} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_hruler_new (void)
Create a new @code{GtkHRuler} object returning the new widget as a pointer
to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@gtkstdmacros{HRuler, HRULER}


@page
@node GtkHScale, GtkHScrollbar, GtkHRuler, Widgets
@comment node-name, next, previous, up
@section The horizontal scale widget


@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_hscale_get_type (void)
Returns the @code{GtkHScale} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_hscale_new (GtkAdjustment *@var{adjustment})
Create a new @code{GtkHScale} object returning the new widget as a pointer
to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@gtkstdmacros{HScale, HSCALE}


@page
@node GtkHScrollbar, GtkHSeparator, GtkHScale, Widgets
@comment node-name, next, previous, up
@section The horizontal scrollbar widget


@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_hscrollbar_get_type (void)
Returns the @code{GtkHScrollbar} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_hscrollbar_new (GtkAdjustment *@var{adjustment})
Create a new @code{GtkHScrollbar} object returning the new widget as a 
pointer to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@gtkstdmacros{HScrollbar, HSCROLLBAR}


@page
@node GtkHSeparator, GtkImage, GtkHScrollbar, Widgets
@comment node-name, next, previous, up
@section The horizontal separator widget


@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_hseparator_get_type (void)
Returns the @code{GtkHSeparator} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_hseparator_new (void)
Create a new @code{GtkHSeparator} object returning the new widget as a pointer
to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@gtkstdmacros{HSeparator, HSEPARATOR}


@page
@node GtkImage, GtkInputDialog, GtkHSeparator, Widgets
@comment node-name, next, previous, up
@section The image widget


@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_image_get_type (void)
Returns the @code{GtkImage} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_image_new (GdkImage *@var{val}, GdkBitmap *@var{mask})
Create a new @code{GtkImage} object initializing it with the values in 
@var{val} and @var{mask}. The new widget is returned as a pointer to a 
@code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_image_set (GtkImage *@var{image}, GdkImage *@var{val}, GdkBitmap *@var{mask})
@end deftypefun

@deftypefun void gtk_image_get (GtkImage *@var{image}, GdkImage **@var{val}, GdkBitmap **@var{mask})
@end deftypefun

@gtkstdmacros{Image, IMAGE}

@page
@node GtkInputDialog, GtkItem, GtkImage, Widgets
@comment node-name, next, previous, up
@section The input dialog widget

@subsection Description

@subsection Options

@subsection Signals

@deftypefn Signal void GtkInputDialog::enable_device (GtkInputDialog *@var{inputd}, guint32 @var{devid}, gpointer *@var{data})
@end deftypefn

@deftypefn Signal void GtkInputDialog::disable_device (GtkInputDialog *@var{inputd}, guint32 @var{devid}, gpointer *@var{data})
@end deftypefn

@subsection Functions

@deftypefun guint gtk_input_dialog_get_type (void)
Returns the @code{GtkInputDialog} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_input_dialog_new (void)
Create a new @code{GtkInputDialog} object and return the new widget as a 
pointer to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun


@gtkstdmacros{InputDialog, INPUTDIALOG}

@page
@node GtkItem, GtkLabel, GtkInputDialog, Widgets
@comment node-name, next, previous, up
@section The item widget


@subsection Description

@subsection Signals

@deftypefn Signal void GtkItem::select (GtkItem *@var{item})
@end deftypefn

@deftypefn Signal void GtkItem::deselect (GtkItem *@var{item})
@end deftypefn

@deftypefn Signal void GtkItem::toggle (GtkItem *@var{toggle})
@end deftypefn

@subsection Functions

@deftypefun guint gtk_item_get_type (void)
Returns the @code{GtkItem} type identifier.
@end deftypefun

@deftypefun void gtk_item_select (GtkItem *@var{item})
@end deftypefun

@deftypefun void gtk_item_deselect (GtkItem *@var{item})
@end deftypefun

@deftypefun void gtk_item_toggle (GtkItem *@var{item})
@end deftypefun

@gtkstdmacros{Item, ITEM}


@page
@node GtkLabel, GtkList, GtkItem, Widgets
@comment node-name, next, previous, up
@section The label widget

@subsection Description

@subsection Options

@defopt str
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_label_get_type (void)
Returns the @code{GtkLabel} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_label_new (GtkLabel *@var{label}, gchar *@var{str})
Create a new @code{GtkLabel} object and initialize it with the 
text in @var{str}. The new widget is returned as a pointer to a 
@code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_label_set (GtkLabel *@var{label}, gchar *@var{str})
Set the @code{GtkLabel} label value to the value passed in the @var{str} 
argument.
@end deftypefun

@deftypefun void gtk_label_get (GtkLabel *@var{label}, gchar **@var{str})
Copies the current value in the @code{GtkLabel} label field to the variable
passed in the @var{str} argument.
@end deftypefun

@gtkstdmacros{Label, LABEL}


@page
@node GtkList, GtkListItem, GtkLabel, Widgets
@comment node-name, next, previous, up
@section The list widget


@subsection Description

@subsection Signals

@deftypefn Signal void GtkList::selection_changed (GtkList *@var{list})
@end deftypefn

@deftypefn Signal void GtkList::select_child (GtkList *@var{list}, GtkWidget *@var{child})
@end deftypefn

@deftypefn Signal void GtkList::unselect_child (GtkList *@var{list}, GtkWidget *@var{child})
@end deftypefn

@subsection Functions

@deftypefun guint gtk_list_get_type (void)
Returns the @code{GtkList} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_list_new (void)
Create a new @code{GtkList} object and return the new widget as a pointer to
a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_list_insert_items (GtkList *@var{list}, GList *@var{items}, gint @var{position})
@end deftypefun

@deftypefun void gtk_list_append_items (GtkList *@var{list}, GList *@var{items})
@end deftypefun

@deftypefun void gtk_list_prepend_items (GtkList *@var{list}, GList *@var{items})
@end deftypefun

@deftypefun void gtk_list_remove_items (GtkList *@var{list}, GList *@var{items})
@end deftypefun

@deftypefun void gtk_list_clear_items (GtkList *@var{list}, gint @var{start}, gint @var{end})
@end deftypefun

@deftypefun void gtk_list_select_item (GtkList *@var{list}, gint @var{item})
@end deftypefun

@deftypefun void gtk_list_unselect_item (GtkList *@var{list}, gint @var{item})
@end deftypefun

@deftypefun void gtk_list_select_child (GtkList *@var{list}, GtkWidget *@var{child})
@end deftypefun

@deftypefun void gtk_list_unselect_child (GtkList *@var{list}, GtkWidget *@var{child})
@end deftypefun

@deftypefun gint gtk_list_child_position (GtkList *@var{list}, GtkWidget *@var{child})
@end deftypefun

@deftypefun void gtk_list_set_selection_mode (GtkList *@var{list}, GtkSelectionMode @var{mode})
@end deftypefun

@gtkstdmacros{List, LIST}


@page
@node GtkListItem, GtkMenu, GtkList, Widgets
@comment node-name, next, previous, up
@section The list item widget


@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_list_item_get_type (void)
Returns the @code{GtkListItem} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_list_item_new (void)
Create a new @code{GtkListItem} object and return the new widget as a 
pointer to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun GtkWidget* gtk_list_item_new_with_label (gchar *@var{label})
Create a new @code{GtkListItem} object initializing with the value @var{label}.
The new widget is returned as a pointer to a @code{GtkWidget} object. 
@code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_list_item_select (GtkListItem *@var{list_item})
@end deftypefun

@deftypefun void gtk_list_item_deselect (GtkListItem *@var{list_item})
@end deftypefun

@gtkstdmacros{ListItem, LIST_ITEM}


@page
@node GtkMenu, GtkMenuBar, GtkListItem, Widgets
@comment node-name, next, previous, up
@section The menu widget


@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_menu_get_type (void)
Returns the @code{GtkMenu} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_menu_new (void)
Create a new @code{GtkMenu} object returning the new widget as a pointer to 
a @code{GtkWidget}. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_menu_append (GtkMenu *@var{menu}, GtkWidget *@var{child})
@end deftypefun

@deftypefun void gtk_menu_prepend (GtkMenu *@var{menu}, GtkWidget *@var{child})
@end deftypefun

@deftypefun void gtk_menu_insert (GtkMenu *@var{menu}, GtkWidget *@var{child}, gint @var{position})
@end deftypefun

@deftypefun void gtk_menu_popup (GtkMenu *@var{menu}, GtkWidget *@var{parent_menu_shell}, GtkWidget *@var{parent_menu_item}, GtkMenuPositionFunc @var{func}, gpointer @var{data}, gint @var{button})
@end deftypefun

@deftypefun void gtk_menu_popdown (GtkMenu *@var{menu})
@end deftypefun

@deftypefun GtkWidget* gtk_menu_get_active (GtkMenu *@var{menu})
@end deftypefun

@deftypefun void gtk_menu_set_active (GtkMenu *@var{menu})
@end deftypefun

@deftypefun void gtk_menu_set_accelerator_table (GtkMenu *@var{menu}, GtkAcceleratorTable *@var{table})
@end deftypefun

@gtkstdmacros{Menu, MENU}


@page
@node GtkMenuBar, GtkMenuItem, GtkMenu, Widgets
@comment node-name, next, previous, up
@section The menu bar widget

@subsection Description

@subsection Options

@defopt position
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_menu_bar_get_type (void)
Returns the @code{GtkMenuBar} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_menu_bar_new (void)
Create a new @code{GtkMenuBar} object returning the new widget as a pointer
to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_menu_bar_append (GtkMenuBar *@var{menu_bar}, GtkWidget *@var{child})
@end deftypefun

@deftypefun void gtk_menu_bar_prepend (GtkMenuBar *@var{menu_bar}, GtkWidget *@var{child})
@end deftypefun

@deftypefun void gtk_menu_bar_insert (GtkMenuBar *@var{menu_bar}, GtkWidget *@var{child}, gint @var{position})
@end deftypefun

@gtkstdmacros{MenuBar, MENU_BAR}


@page
@node GtkMenuItem, GtkMenuShell, GtkMenuBar, Widgets
@comment node-name, next, previous, up
@section The menu item widget


@subsection Description

@subsection Options

@subsection Signals

@deftypefn Signal void GtkMenuItem::activate (GtkMenuItem *@var{menu_item})
@end deftypefn

@subsection Functions

@deftypefun guint gtk_menu_item_get_type (void)
Returns the @code{GtkMenuItem} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_menu_item_new (void)
Create a new @code{GtkMenuItem} object returning the new widget as a pointer 
to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun GtkWidget* gtk_menu_item_new_with_label (gchar *@var{label})
Create a new @code{GtkMenuItem} object initializing it with the value in 
@var{label}. The new widget is returned as a pointer to a @code{GtkWidget}
object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_menu_item_set_submenu (GtkMenuItem *@var{menu_item}, GtkWidget *@var{submenu})
@end deftypefun

@deftypefun void gtk_menu_item_set_placement (GtkMenuItem *@var{menu_item}, GtkSubmenuPlacement @var{placement})
@end deftypefun

@deftypefun void gtk_menu_item_accelerator_size (GtkMenuItem *@var{menu_item})
@end deftypefun

@deftypefun void gtk_menu_item_accelerator_text (GtkMenuItem *@var{menu_item}, gchar *@var{buffer})
@end deftypefun

@deftypefun void gtk_menu_item_configure (GtkMenuItem *@var{menu_item}, gint @var{show_toggle_indicator}, gint @var{show_submenu_indicator})
@end deftypefun

@deftypefun void gtk_menu_item_select (GtkMenuItem *@var{menu_item})
@end deftypefun

@deftypefun void gtk_menu_item_deselect (GtkMenuItem *@var{menu_item})
@end deftypefun

@deftypefun void gtk_menu_item_activate (GtkMenuItem *@var{menu_item})
@end deftypefun

@gtkstdmacros{MenuItem, MENU_ITEM}


@page
@node GtkMenuShell, GtkMisc, GtkMenuItem, Widgets
@comment node-name, next, previous, up
@section The menu shell widget


@subsection Description

@subsection Options

@subsection Signals

@deftypefn Signal void GtkMenuShell::deactivate (GtkMenuShell *@var{menu_shell})
@end deftypefn

@subsection Functions

@deftypefun guint gtk_menu_shell_get_type (void)
Returns the @code{GtkMenuShell} type identifier.
@end deftypefun

@deftypefun void gtk_menu_shell_append (GtkMenuShell *@var{menu_shell}, GtkWidget *@var{child})
@end deftypefun

@deftypefun void gtk_menu_shell_prepend (GtkMenuShell *@var{menu_shell}, GtkWidget *@var{child})
@end deftypefun

@deftypefun void gtk_menu_shell_insert (GtkMenuShell *@var{menu_shell}, GtkWidget *@var{child}, gint @var{position})
@end deftypefun

@deftypefun void gtk_menu_shell_deactivate (GtkMenuShell *@var{menu_shell})
@end deftypefun

@gtkstdmacros{MenuShell, MENU_SHELL}


@page
@node GtkMisc, GtkNotebook, GtkMenuShell, Widgets
@comment node-name, next, previous, up
@section The misc widget

@subsection Description

@subsection Options

@defopt xalign
@end defopt

@defopt yalign
@end defopt

@defopt xpad
@end defopt

@defopt ypad
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_misc_get_type (void)
Returns the @code{GtkMisc} type identifier.
@end deftypefun

@deftypefun void gtk_misc_set_alignment (GtkMisc *@var{misc}, gfloat @var{xalign}, gfloat @var{yalign})
@end deftypefun

@deftypefun void gtk_misc_set_padding (GtkMisc *@var{misc}, gint @var{xpad}, gint @var{ypad})
@end deftypefun

@gtkstdmacros{Misc, MISC}


@page
@node GtkNotebook, GtkOptionMenu, GtkMisc, Widgets
@comment node-name, next, previous, up
@section The notebook widget

@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_notebook_get_type (void)
Returns the @code{GtkNotebook} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_notebook_new (void)
Create a new @code{GtkNotebook} object returning the new widget as a pointer
to a @code{GtkWidget} object. @code{NULL} is returned on a failure.
@end deftypefun

@deftypefun void gtk_notebook_append_page (GtkNotebook *@var{notebook}, GtkWidget *@var{child}, GtkWidget *@var{tab_label})
@end deftypefun

@deftypefun void gtk_notebook_prepend_page (GtkNotebook *@var{notebook}, GtkWidget *@var{child}, GtkWidget *@var{tab_label})
@end deftypefun

@deftypefun void gtk_notebook_insert_page (GtkNotebook *@var{notebook}, GtkWidget *@var{child}, GtkWidget *@var{tab_label}, gint @var{position})
@end deftypefun

@deftypefun void gtk_notebook_remove_page (GtkNotebook *@var{notebook}, gint @var{page_num})
@end deftypefun

@deftypefun void gtk_notebook_set_page (GtkNotebook *@var{notebook}, gint @var{page_num})
@end deftypefun

@deftypefun void gtk_notebook_next_page (GtkNotebook *@var{notebook})
@end deftypefun

@deftypefun void gtk_notebook_prev_page (GtkNotebook *@var{notebook})
@end deftypefun

@deftypefun void gtk_notebook_set_tab_pos (GtkNotebook *@var{notebook}, GtkPositionType @var{pos})
@end deftypefun

@deftypefun void gtk_notebook_set_show_tabs (GtkNotebook *@var{notebook}, gint @var{show_tabs})
@end deftypefun

@deftypefun void gtk_notebook_set_show_border (GtkNotebook *@var{notebook}, gint @var{show_border})
@end deftypefun

@gtkstdmacros{Notebook, NOTEBOOK}


@page
@node GtkOptionMenu, GtkPaned, GtkNotebook, Widgets
@comment node-name, next, previous, up
@section The option menu widget

@subsection Description

@subsection Options

@defopt index
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_option_menu_get_type (void)
Returns the @code{GtkOptionMenu} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_option_menu_new (void)
Create a new @code{GtkOptionMenu} object returning the new widget as a 
pointer to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun GtkWidget* gtk_option_menu_get_menu (GtkOptionMenu *@var{option_menu})
@end deftypefun

@deftypefun void gtk_option_menu_set_menu (GtkOptionMenu *@var{option_menu}, GtkWidget *@var{menu})
@end deftypefun

@deftypefun void gtk_option_menu_remove_menu (GtkOptionMenu *@var{option_menu})
@end deftypefun

@deftypefun void gtk_option_menu_set_history (GtkOptionMenu *@var{option_menu}, gint @var{index})
@end deftypefun

@gtkstdmacros{OptionMenu, OPTION_MENU}

@page
@node GtkPaned, GtkPixmap, GtkOptionMenu, Widgets
@comment node-name, next, previous, up
@section The paned widget

@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_paned_get_type (void)
Returns the @code{GtkPaned} type identifier.
@end deftypefun

@deftypefun void gtk_paned_add1 (GtkPaned *@var{paned}, GtkWidget *@var{child})
@end deftypefun

@deftypefun void gtk_paned_add2 (GtkPaned *@var{paned}, GtkWidget *@var{child})
@end deftypefun

@deftypefun void gtk_paned_handle_size (GtkPaned *@var{paned}, guint16 @var{size})
@end deftypefun


@deftypefun void gtk_paned_gutter_size (GtkPaned *@var{paned}, guint16 @var{size})
@end deftypefun

@gtkstdmacros{Paned, PANED}

@page
@node GtkPixmap, GtkPreview, GtkPaned, Widgets
@comment node-name, next, previous, up
@section The pixmap widget


@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_pixmap_get_type (void)
Returns the @code{GtkPixmap} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_pixmap_new (GdkPixmap *@var{normal}, GdkPixmap *@var{active}, GdkPixmap *@var{prelight}, GdkPixmap *@var{selected}, GdkPixmap *@var{insensitive})
@end deftypefun

@deftypefun void gtk_pixmap_set (GtkPixmap *@var{pixmap}, GdkPixmap *@var{val}, GtkStateType @var{state})
@end deftypefun

@deftypefun void gtk_pixmap_get (GtkPixmap *@var{pixmap}, GdkPixmap **@var{val}, GtkStateType @var{state})
@end deftypefun

@gtkstdmacros{Pixmap, PIXMAP}


@page
@node GtkPreview, GtkProgressBar, GtkPixmap, Widgets
@comment node-name, next, previous, up
@section The preview widget

@subsection Description

@subsection Options

@defopt type
@end defopt

@defopt width
@end defopt

@defopt height
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_preview_get_type (void)
Returns the @code{GtkPreview} type identifier.
@end deftypefun

@deftypefun void gtk_preview_uninit (void)
@end deftypefun

@deftypefun GtkWidget* gtk_preview_new (GtkPreviewType @var{type})
Create a new @code{GtkPreview} object initializing it with the values in 
@var{type}. The new widget is returned as a pointer to a @code{GtkWidget} 
object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_preview_size (GtkPreview *@var{preview}, gint @var{width}, gint @var{height})
Set the size of the @var{preview} object to @var{width} and @var{height}.
@end deftypefun

@deftypefun void gtk_preview_put (GtkPreview *@var{preview}, GdkWindow *@var{window}, GdkGC *@var{gc}, gint @var{srcx}, gint @var{srcy}, gint @var{destx}, gint @var{desty}, gint @var{width}, gint @var{height})
@end deftypefun

@deftypefun void gtk_preview_put_row (GtkPreview *@var{preview}, guchar *@var{src}, guchar *@var{dest}, gint @var{x}, gint @var{y}, gint @var{w})
@end deftypefun

@deftypefun void gtk_preview_draw_row (GtkPreview *@var{preview}, guchar @var{data}, gint @var{x}, gint @var{y}, gint @var{w})
@end deftypefun

@deftypefun void gtk_preview_set_expand (GtkPreview *@var{preview}, gint @var{expand})
@end deftypefun

@deftypefun void gtk_preview_set_gamma (double @var{gamma})
@end deftypefun

@deftypefun void gtk_preview_set_color_cube (guint @var{nred_shades}, guint @var{ngreen_shades}, guint @var{nblue_shades}, guint @var{ngray_shades})
@end deftypefun

@deftypefun void gtk_preview_set_install_cmap (gint @var{install_cmap})
@end deftypefun

@deftypefun void gtk_preview_set_reserved (gint @var{nreserved})
@end deftypefun

@deftypefun GdkVisual* gtk_preview_get_visual (void)
@end deftypefun

@deftypefun GdkColormap* gtk_preview_get_cmap (void)
@end deftypefun

@deftypefun GtkPreviewInfo* gtk_preview_get_info (void)
@end deftypefun

@gtkstdmacros{Preview, PREVIEW}


@page
@node GtkProgressBar, GtkRadioButton, GtkPreview, Widgets
@comment node-name, next, previous, up
@section The progress bar widget


@subsection Description

@subsection Options

@defopt percentage
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_progress_bar_get_type (void)
Returns the @code{GtkProgressBar} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_progress_bar_new (void)
Create a new @code{GtkProgressBar} object returning the new widget as a 
pointer to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_progress_bar_update (GtkProgressBar *@var{pbar}, gfloat @var{percentage})
Cause the @code{GtkProgressBar} to update its visual appearance to reflect the
@var{percentage}.
@end deftypefun

@gtkstdmacros{ProgressBar, PROGRESS_BAR}


@page
@node GtkRadioButton, GtkRadioMenuItem, GtkProgressBar, Widgets
@comment node-name, next, previous, up
@section The radio button widget

@subsection Description

@subsection Options

@defopt group
@end defopt

@defopt label
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_radio_button_get_type (void)
Returns the @code{GtkRadioButton} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_radio_button_new (GSList *@var{group})
Create a new @code{GtkRadioButton} object initializing it with the value
in the @var{group} argument. The new widget is returned as a pointer to a 
@code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun GtkWidget* gtk_radio_button_new_with_label (GSList *@var{group}, gchar *@var{label})
Create a new @code{GtkRadioButton} object initializing it with the values in
the @var{group} and @var{label} arguments. The new widget is returned as a 
pointer to @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun GSList* gtk_radio_button_group (GtkRadioButton *@var{radio_button})
@end deftypefun

@gtkstdmacros{RadioButton, RADIO_BUTTON}


@page
@node GtkRadioMenuItem, GtkRange, GtkRadioButton, Widgets
@comment node-name, next, previous, up
@section The radio button widget


@subsection Description

@subsection Options

@defopt group
@end defopt

@defopt label
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_radio_menu_item_get_type (void)
Returns the @code{GtkRadioMenuItem} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_radio_menu_item_new (GSList *@var{group})
Create a new @code{GtkRadioMenuItem} object and initialize it with the 
values in @var{group}. The new widget is returned as a pointer to a 
@code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun GtkWidget* gtk_radio_menu_item_new_with_label (GSList *@var{group}, gchar *@var{label})
@end deftypefun

@deftypefun GSList* gtk_radio_menu_item_group (GtkRadioMenuItem *@var{radio_menu_item})
@end deftypefun

@gtkstdmacros{RadioMenuItem, RADIO_MENU_ITEM}


@page
@node GtkRange, GtkRuler, GtkRadioMenuItem, Widgets
@comment node-name, next, previous, up
@section The range widget

@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_range_get_type (void)
Returns the @code{GtkRange} type identifier.
@end deftypefun

@deftypefun GtkAdjustment* gtk_range_get_adjustment (GtkRange *@var{range})
@end deftypefun

@deftypefun void gtk_range_set_update_policy (GtkRange *@var{range}, GtkUpdatePolicy @var{policy})
@end deftypefun

@deftypefun void gtk_range_set_adjustment (GtkRange *@var{range}, GtkAdjustment *@var{adjustment})
@end deftypefun

@deftypefun void gtk_range_draw_background (GtkRange *@var{range})
@end deftypefun

@deftypefun void gtk_range_draw_trough (GtkRange *@var{range})
@end deftypefun

@deftypefun void gtk_range_draw_slider (GtkRange *@var{range})
@end deftypefun

@deftypefun void gtk_range_draw_step_forw (GtkRange *@var{range})
@end deftypefun

@deftypefun void gtk_range_draw_step_back (GtkRange *@var{range})
@end deftypefun

@deftypefun void gtk_range_slider_update (GtkRange *@var{range})
@end deftypefun

@deftypefun gint gtk_range_trough_click (GtkRange *@var{range}, gint @var{x}, gint @var{y})
@end deftypefun

@deftypefun void gtk_range_default_hslider_update (GtkRange *@var{range})
@end deftypefun

@deftypefun void gtk_range_default_vslider_update (GtkRange *@var{range})
@end deftypefun

@deftypefun gint gtk_range_default_htrough_click (GtkRange *@var{range}, gint @var{x}, gint @var{y})
@end deftypefun

@deftypefun gint gtk_range_default_vtrough_click (GtkRange *@var{range}, gint @var{x}, gint @var{y})
@end deftypefun

@deftypefun void gtk_range_default_hmotion (GtkRange *@var{range}, gint @var{xdelta}, gint @var{ydelta})
@end deftypefun

@deftypefun void gtk_range_default_vmotion (GtkRange *@var{range}, gint @var{xdelta}, gint @var{ydelta})
@end deftypefun

@deftypefun gfloat gtk_range_calc_value (GtkRange *@var{range}, gint @var{position})
@end deftypefun

@gtkstdmacros{Range, RANGE}


@page
@node GtkRuler, GtkScale, GtkRange, Widgets
@comment node-name, next, previous, up
@section The ruler widget

@subsection Description

@subsection Options

@defopt metric
@end defopt

@defopt lower
@end defopt

@defopt upper
@end defopt

@defopt position
@end defopt

@defopt max_size
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_ruler_get_type (void)
Returns the @code{GtkRuler} type identifier.
@end deftypefun

@deftypefun void gtk_ruler_set_metric (GtkRuler *@var{ruler}, GtkMetricType @var{metric})
@end deftypefun

@deftypefun void gtk_ruler_set_range (GtkRuler *@var{ruler}, gfloat @var{lower}, gfloat @var{upper}, gfloat @var{position}, gfloat @var{max_size})
@end deftypefun

@deftypefun void gtk_ruler_draw_ticks (GtkRuler *@var{ruler})
@end deftypefun

@deftypefun void gtk_ruler_draw_pos (GtkRuler *@var{ruler})
@end deftypefun

@gtkstdmacros{Ruler, RULER}


@page
@node GtkScale, GtkScrollbar, GtkRuler, Widgets
@comment node-name, next, previous, up
@section The scale widget


@subsection Description

@subsection Options

@defopt digits
@end defopt

@defopt draw_value
@end defopt

@defopt pos
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_scale_get_type (void)
Returns the @code{GtkScale} type identifier.
@end deftypefun

@deftypefun void gtk_scale_set_digits (GtkScale *@var{scale}, gint @var{digits})
@end deftypefun

@deftypefun void gtk_scale_set_draw_value (GtkScale *@var{scale}, gint @var{draw_value})
@end deftypefun

@deftypefun void gtk_scale_set_value_pos (GtkScale *@var{scale}, gint @var{pos})
@end deftypefun

@deftypefun gint gtk_scale_value_width (GtkScale *@var{scale})
@end deftypefun

@deftypefun void gtk_scale_draw_value (GtkScale *@var{scale})
@end deftypefun

@gtkstdmacros{Scale, SCALE}


@page
@node GtkScrollbar, GtkScrolledWindow, GtkScale, Widgets
@comment node-name, next, previous, up
@section The scrollbar widget


@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_scrollbar_get_type (void)a
Returns the @code{GtkScrollbar} type identifier.
@end deftypefun

@gtkstdmacros{Scrollbar, SCROLLBAR}


@page
@node GtkScrolledWindow, GtkSeparator, GtkScrollbar, Widgets
@comment node-name, next, previous, up
@section The scrolled window widget


@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_scrolled_window_get_type (void)
Returns the @code{GtkScrolledWindow} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_scrolled_window_new (GtkAdjustment *@var{hadjustment}, GtkAdjustment *@var{vadjustment})
Create a new @code{GtkScrolledWindow} object initializing it with the values in
@var{adjustment} and @var{adjustment}. The new widget is returned as a 
pointer to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun GtkAdjustment* gtk_scrolled_window_get_hadjustment (GtkScrolledWindow *@var{scrolled_window})
@end deftypefun

@deftypefun GtkAdjustment* gtk_scrolled_window_get_vadjustment (GtkScrolledWindow *@var{scrolled_window})
@end deftypefun

@deftypefun void gtk_scrolled_window_set_policy (GtkScrolledWindow *@var{scrolled_window}, GtkPolicyType @var{hscrollbar_policy}, GtkPolicyType @var{vscrollbar_policy})
@end deftypefun

@gtkstdmacros{ScrolledWindow, SCROLLED_WINDOW}


@page
@node GtkSeparator, GtkStatusbar, GtkScrolledWindow, Widgets
@comment node-name, next, previous, up
@section The separator widget


@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_separator_get_type (void)
Returns the @code{GtkSeparator} type identifier.
@end deftypefun

@gtkstdmacros{Separator, SEPARATOR}

@page
@node GtkStatusbar, GtkTable, GtkSeparator, Widgets
@comment node-name, next, previous, up
@section The statusbar widget

@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_statusbar_get_type (void)
Returns the @code{GtkStatusbar} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_statusbar_new (void)
Create a new @code{GtkStatusbar} object returning the new widget as a pointer
to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun gint gtk_statusbar_push (GtkStatusbar *@var{statusbar}, gchar *@var{text})
@end deftypefun

@deftypefun void gtk_statusbar_pop (GtkStatusbar *@var{statusbar}, gint @var{context_id})
@end deftypefun

@gtkstdmacros{Statusbar, STATUSBAR}

@page
@node GtkTable, GtkText, GtkStatusbar, Widgets
@comment node-name, next, previous, up
@section The table widget

@subsection Description

@subsection Options

@defopt rows
@end defopt

@defopt columns
@end defopt

@defopt homogeneous
This option controls whether all child widgets in the @code{GtkTable} will
be of the same size. The child widgets will be the size of the largest child.
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_table_get_type (void)
Returns the @code{GtkTable} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_table_new (gint @var{rows}, gint @var{columns}, gint @var{homogeneous})
Create a new @code{GtkTable} object initializing it with the values in 
@var{rows}, @var{columns} and @var{homogeneous}. The new widget is returned 
as a pointer to a @code{GtkWidget}. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_table_attach (GtkTable *@var{table}, GtkWidget *@var{child}, gint @var{left_attach}, gint @var{right_attach}, gint @var{top_attach}, gint @var{bottom_attach}, gint @var{xoptions}, gint @var{yoptions}, gint @var{xpadding}, gint @var{ypadding})
@end deftypefun

@deftypefun void gtk_table_attach_defaults (GtkTable *@var{table}, GtkWidget *@var{widget}, gint @var{left_attach}, gint @var{right_attach}, gint @var{top_attach}, gint @var{bottom_attach})
@end deftypefun

@deftypefun void gtk_table_set_row_spacing (GtkTable *@var{table}, gint @var{row}, gint @var{spacing})
@end deftypefun

@deftypefun void gtk_table_set_col_spacing (GtkTable *@var{table}, gint @var{col}, gint @var{spacing})
@end deftypefun

@deftypefun void gtk_table_set_row_spacings (GtkTable *@var{table}, gint @var{spacing})
@end deftypefun

@deftypefun void gtk_table_set_col_spacings (GtkTable *@var{table}, gint @var{spacing})
@end deftypefun

@gtkstdmacros{Table, TABLE}


@page
@node GtkText, GtkToggleButton, GtkTable, Widgets
@comment node-name, next, previous, up
@section The text widget


@subsection Description

@subsection Signals

@subsection Functions

@deftypefun guint gtk_text_get_type (void)
Returns the @code{GtkText} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_text_new (GtkAdjustment *@var{hadj}, GtkAdjustment *@var{vadj});
Create a new @code{GtkText} object initializing it with the values in 
@var{hadj} and @var{vadj}. The new widget is returned as a pointer to a 
@code{GtkWidget}. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_text_set_editable (GtkText *@var{text}, gint @var{editable})
@end deftypefun

@deftypefun void gtk_text_set_adjustments (GtkText *@var{text}, GtkAdjustment *@var{hadj}, GtkAdjustment *@var{vadj})
@end deftypefun

@deftypefun void gtk_text_set_point (GtkText *@var{text}, guint @var{index})
@end deftypefun

@deftypefun guint gtk_text_get_point (GtkText *@var{text})
@end deftypefun

@deftypefun guint gtk_text_get_length (GtkText *@var{text})
@end deftypefun

@deftypefun void gtk_text_freeze (GtkText *@var{text})
@end deftypefun

@deftypefun void gtk_text_thaw (GtkText *@var{text})
@end deftypefun

@deftypefun void gtk_text_insert (GtkText *@var{text}, GdkFont *@var{font}, GdkColor *@var{fore}, GdkColor *@var{back}, char *@var{chars}, gint @var{length})
@end deftypefun

@deftypefun gint gtk_text_forward_delete (GtkText *@var{text}, guint @var{nchars})
@end deftypefun

@deftypefun gint gtk_text_backward_delete (GtkText *@var{text}, guint @var{nchars})
@end deftypefun


@gtkstdmacros{Text, TEXT}


@page
@node GtkToggleButton, GtkToolbar, GtkText, Widgets
@comment node-name, next, previous, up
@section The toggle button widget


@subsection Description

Another form of button (@pxref{GtkButton}) with two states: on and off.
The appearance is that of a button which stays pressed on the first
click, and is released on the second click.

@subsection Options

@defopt state
@end defopt

@subsection Signals

@deftypefn Signal void GtkToggleButton::toggled (GtkToggleButton *@var{toggle_button})
@end deftypefn

@subsection Functions

@deftypefun guint gtk_toggle_button_get_type (void)
Returns the @code{GtkToggleButton} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_toggle_button_new (void)
Create a new @code{GtkToggleButton} object returning the new widget as a 
pointer to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun GtkWidget* gtk_toggle_button_new_with_label (gchar *@var{label})
Create a new @code{GtkToggleButton} object initializing it with the values in
@var{label}. The new widget is returned as a pointer to a @code{GtkWidget} 
object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_toggle_button_set_mode (GtkToggleButton *@var{toggle_button}, gint @var{draw_indicator})
@end deftypefun

@deftypefun void gtk_toggle_button_set_state (GtkToggleButton *@var{toggle_button}, gint @var{state})
@end deftypefun

@deftypefun void gtk_toggle_button_toggled (GtkToggleButton *@var{toggle_button})
@end deftypefun

@gtkstdmacros{ToggleButton, TOGGLE_BUTTON}


@page 
@node GtkToolbar, GtkTooltips, GtkToggleButton, Widgets
@comment node-name, next, previous, up
@section The tool bar widget

@subsection Description

@subsection Options

@defopt orientation
@itemize @bullet
@item GTK_ORIENTATION_HORIZONTAL

@item GTK_ORIENTATION_VERTICAL
@end itemize
@end defopt

@defopt style
@itemize @bullet
@item GTK_TOOLBAR_ICONS
@item GTK_TOOLBAR_TEXT
@item GTK_TOOLBAR_BOTH
@end itemize
@end defopt

@defopt space_size
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_toolbar_get_type (void)
Returns the @code{GtkToolbar} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_toolbar_new (GtkOrientation @var{orientation}, GtkToolbarStyle @var{style})
Create a new @code{GtkToolbar} object initializing it with the values
@var{orientation} and @var{style}. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_toolbar_append_item (GtkToolbar *@var{toolbar}, char *@var{text}, char *@var{tooltip_text}, GtkPixmap *@var{icon}, GtkSignalFunc @var{callback}, gpointer @var{user_data})
@end deftypefun

@deftypefun void gtk_toolbar_prepend_item (GtkToolbar *@var{toolbar}, char *@var{text}, char *@var{tooltip_text}, GtkPixmap *@var{icon}, GtkSignalFunc @var{callback}, gpointer @var{user_data})
@end deftypefun

@deftypefun void gtk_toolbar_insert_item (GtkToolbar *@var{toolbar}, char *@var{text}, char *@var{tooltip_text}, GtkPixmap *@var{icon}, GtkSignalFunc @var{callback}, gpointer @var{user_data}, gint @var{position})
@end deftypefun

@deftypefun void gtk_toolbar_append_space (GtkToolbar *@var{toolbar})
@end deftypefun

@deftypefun void gtk_toolbar_prepend_space (GtkToolbar *@var{toolbar})
@end deftypefun

@deftypefun void gtk_toolbar_insert_space (GtkToolbar *@var{toolbar}, gint @var{position})
@end deftypefun

@deftypefun void gtk_toolbar_set_orientation (GtkToolbar *@var{toolbar}, GtkOrientation @var{orientation})
@end deftypefun

@deftypefun void gtk_toolbar_set_style (GtkToolbar *@var{toolbar}, GtkToolbarStyle @var{style})
Set the @var{style} of the @var{toolbar} to @var{style}.
@end deftypefun

@deftypefun void gtk_toolbar_set_space_size (GtkToolbar *@var{toolbar}, gint @var{space_size})
@end deftypefun

@deftypefun void gtk_toolbar_set_tooltips (GtkToolbar *@var{toolbar}, gint @var{enable})
@end deftypefun


@gtkstdmacros{Toolbar, TOOLBAR}


@page
@node GtkTooltips, GtkTree, GtkToolbar, Widgets
@comment node-name, next, previous, up
@section The tool tips widget

@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun GtkTooltips* gtk_tooltips_new (void)
Create a new @code{GtkTooltips} object returning the new widget as a 
pointer to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun GtkTooltips* gtk_tooltips_ref (GtkTooltips *@var{tooltips})
@end deftypefun

@deftypefun void gtk_tooltips_unref (GtkTooltips *@var{tooltips})
@end deftypefun

@deftypefun void gtk_tooltips_free_string (gpointer @var{data}, gpointer @var{user_data})
@end deftypefun

@deftypefun void gtk_tooltips_enable (GtkTooltips *@var{tooltips})
@end deftypefun

@deftypefun void gtk_tooltips_disable (GtkTooltips *@var{tooltips})
@end deftypefun

@deftypefun void gtk_tooltips_set_delay (GtkTooltips *@var{tooltips}, GtkWidget *@var{widget}, gchar *@var{tips_text})
@end deftypefun

@deftypefun void gtk_tooltips_set_colors (GtkTooltips *@var{tooltips}, GdkColor *@var{background}, GdkColor *@var{foreground})
@end deftypefun


@gtkstdmacros{Tooltips, TOOLTIPS}


@page
@node GtkTree, GtkTreeItem, GtkTooltips, Widgets
@comment node-name, next, previous, up
@section The tree widget


@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_tree_get_type (void)
Returns the @code{GtkTree} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_tree_new (void)
Create a new @code{GtkTree} object returning the new widget as a pointer to
a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_tree_append (GtkTree *@var{tree}, GtkWidget *@var{child})
@end deftypefun

@deftypefun void gtk_tree_prepend (GtkTree *@var{tree}, GtkWidget *@var{child})
@end deftypefun

@deftypefun void gtk_tree_insert (GtkTree *@var{tree}, GtkWidget *@var{child}, gint @var{position})
@end deftypefun

@deftypefun gint gtk_tree_child_position (GtkTree *@var{tree}, GtkWidget *@var{child})
@end deftypefun

@deftypefun void gtk_tree_clear_items (GtkTree *@var{tree}, gint @var{start}, gint @var{end})
@end deftypefun

@deftypefun void gtk_tree_remove_items (GtkTree *@var{tree}, GList *@var{items})
@end deftypefun

@deftypefun void gtk_tree_select_child (GtkTree *@var{tree}, GtkWidget *@var{child})
@end deftypefun

@deftypefun void gtk_tree_select_item (GtkTree *@var{tree}, gint @var{item})
@end deftypefun

@deftypefun void gtk_tree_unselect_child (GtkTree *@var{tree}, GtkWidget *@var{child})
@end deftypefun

@deftypefun void gtk_tree_unselect_item (GtkTree *@var{tree}, gint @var{item})
@end deftypefun

@deftypefun void gtk_tree_set_selection_mode (GtkTree *@var{tree}, GtkSelectionMode @var{mode})
@end deftypefun

@deftypefun void gtk_tree_set_view_mode (GtkTree *@var{tree}, GtkTreeViewMode @var{mode})
@end deftypefun

@deftypefun void gtk_tree_set_view_lines (GtkTree *@var{tree}, guint @var{flag})
@end deftypefun


@gtkstdmacros{Tree, TREE}


@page
@node GtkTreeItem, GtkVBox, GtkTree, Widgets
@comment node-name, next, previous, up
@section The tree item widget


@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_tree_item_get_type (void)
Returns the @code{GtkTreeItem} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_tree_item_new (void)
Create a new @code{GtkTreeItem} object returning the new widget as a 
pointer to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun GtkWidget* gtk_tree_item_new_with_label (gchar *@var{label})
Create a new @code{GtkTreeItem} object initializing it with the values in
@var{label}. The new widget is returned as a pointer to a @code{GtkWidget}
object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_tree_item_set_subtree (GtkTreeItem *@var{tree_item}, GtkWidget *@var{subtree})
@end deftypefun

@deftypefun void gtk_tree_item_select (GtkTreeItem *@var{tree_item})
@end deftypefun

@deftypefun void gtk_tree_item_deselect (GtkTreeItem *@var{tree_item})
@end deftypefun

@deftypefun void gtk_tree_item_expand (GtkTreeItem *@var{tree_item})
@end deftypefun

@deftypefun void gtk_tree_item_collapse (GtkTreeItem *@var{tree_item})
@end deftypefun

@deftypefun void gtk_tree_item_remove_subtree (GtkTreeItem *@var{item})
@end deftypefun


@gtkstdmacros{TreeItem, TREE_ITEM}

@page
@node GtkVBox, GtkVButtonBox, GtkTreeItem, Widgets
@comment node-name, next, previous, up
@section The vertical box widget


@subsection Description

@subsection Options

@defopt homogeneous
This option controls whether each object in the box has the same size. In the
case of the @code{GtkVBox}, this refers to the height. If this option is set
then the @var{expand} option to the @code{gtk_box_pack} (@pxref{GtkBox}) 
routines is always turned on.
@end defopt

@defopt spacing
This option sets the amount of space that is added between the objects packed
into this @code{GtkVBox} object.
@end defopt


@subsection Signals
This widget does not define any new signals.

@subsection Functions

@deftypefun guint gtk_vbox_get_type (void)
Returns the @code{GtkVBox} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_vbox_new (gint @var{homogeneous}, gint @var{spacing})
Create a new @code{GtkVBox} object initializing it with the values in 
@var{homogeneous} and @var{spacing}. The new widget is returned as a 
pointer to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@gtkstdmacros{VBox, VBOX}

@page
@node GtkVButtonBox, GtkViewport, GtkVBox, Widgets
@comment node-name, next, previous, up
@section The vertical button box widget


@subsection Description

@subsection Options
@defopt spacing
@end defopt

@defopt layout
@end defopt

@subsection Signals

@subsection Functions

@deftypefun guint gtk_vbutton_box_get_type (void)
Returns the @code{GtkVButtonBox} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_vbutton_box_new (void)
Create a new @code{GtkVButtonBox} object returning the new widget as a
pointer to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@deftypefun void gtk_vbutton_box_set_spacing_default (gint @var{spacing})
@end deftypefun

@deftypefun void gtk_vbutton_box_set_layout_default (gint @var{layout})
@end deftypefun

@deftypefun gint gtk_vbutton_box_get_spacing_default (void)
@end deftypefun

@deftypefun gint gtk_vbutton_box_get_layout_default (void)
@end deftypefun

@gtkstdmacros{VButtonBox, VBUTTON_BOX}


@page
@node GtkViewport, GtkVPaned, GtkVButtonBox, Widgets
@comment node-name, next, previous, up
@section The viewport widget


@subsection Description

@subsection Signals

@subsection Functions

@deftypefun guint gtk_viewport_get_type (void)
Returns the @code{GtkViewport} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_viewport_new (GtkAdjustment *@var{hadjustment}, GtkAdjustment *@var{vadjustment})
@end deftypefun

@deftypefun GtkAdjustment* gtk_viewport_get_hadjustment (GtkViewport *@var{viewport})
@end deftypefun

@deftypefun GtkAdjustment* gtk_viewport_get_vadjustment (GtkViewport *@var{viewport})
@end deftypefun

@deftypefun void gtk_viewport_set_hadjustment (GtkViewport *@var{viewport}, GtkAdjustment *@var{adjustment})
@end deftypefun

@deftypefun void gtk_viewport_set_vadjustment (GtkViewport *@var{viewport}, GtkAdjustment *@var{adjustment})
@end deftypefun

@deftypefun void gtk_viewport_set_shadow_type (GtkViewport *@var{viewport}, GtkShadowType @var{type})
@end deftypefun

@gtkstdmacros{Viewport, VIEWPORT}

@page 
@node GtkVPaned, GtkVRuler, GtkViewport, Widgets
@comment node-name, next, previous, up
@section The vertical paned widget

@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_vpaned_get_type (void)
Returns the @code{GtkVPaned} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_vpaned_new (void)
Create a new @code{GtkVPaned} object returning the new widget as a pointer
to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@gtkstdmacros{VPaned, VPANED}

@page
@node GtkVRuler, GtkVScale, GtkVPaned, Widgets
@comment node-name, next, previous, up
@section The vertical ruler widget


@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_vruler_get_type (void)
Returns the @code{GtkVRuler} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_vruler_new (void)
Create a new @code{GtkVRuler} object returning the new widget as a pointer to 
a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@gtkstdmacros{VRuler, VRULER}


@page
@node GtkVScale, GtkVScrollbar, GtkVRuler, Widgets
@comment node-name, next, previous, up
@section The vertical ruler widget


@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_vscale_get_type (void)
Returns the @code{GtkVScale} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_vscale_new (GtkAdjustment *@var{adjustment})
Create a new @code{GtkVScale} object returning the new widget as a pointer
to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@gtkstdmacros{VScale, VSCALE}


@page
@node GtkVScrollbar, GtkVSeparator, GtkVScale, Widgets
@comment node-name, next, previous, up
@section The vertical scrollbar widget


@subsection Description

@subsection Options

@subsection Signals

@subsection Functions

@deftypefun guint gtk_vscrollbar_get_type (void)
Returns the @code{GtkVScrollbar} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_vscrollbar_new (GtkAdjustment *@var{adjustment})
Create a new @code{GtkVScrollbar} object initializing it with the values in
@var{adjustment}. The new widget is returned as a pointer to a @code{GtkWidget}
object. @code{NULL} is returned on failure.
@end deftypefun

@gtkstdmacros{VScrollbar, VSCROLLBAR}


@page
@node GtkVSeparator, GtkWidget, GtkVScrollbar, Widgets
@comment node-name, next, previous, up
@section The vertical separator widget


@subsection Description

@subsection Signals

@subsection Functions

@deftypefun guint gtk_vseparator_get_type (void)
Returns the @code{GtkVSeparator} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_vseparator_new (void)
Create a new @code{GtkVSeparator} object and return the new widget as a 
pointer to a @code{GtkWidget} object. @code{NULL} is returned on failure.
@end deftypefun

@gtkstdmacros{VSeparator, VSEPARATOR}


@page
@node GtkWidget, GtkWindow, GtkVSeparator, Widgets
@comment node-name, next, previous, up
@section The base widget


@subsection Description

@subsection Signals

@deftypefn Signal void GtkWidget::show (GtkWidget *@var{widget})
@end deftypefn

@deftypefn Signal void GtkWidget::hide (GtkWidget *@var{widget})
@end deftypefn

@deftypefn Signal void GtkWidget::map (GtkWidget *@var{widget})
@end deftypefn

@deftypefn Signal void GtkWidget::unmap (GtkWidget *@var{widget})
@end deftypefn

@deftypefn Signal void GtkWidget::realize (GtkWidget *@var{widget})
@end deftypefn

@deftypefn Signal void GtkWidget::unrealize (GtkWidget *@var{widget})
@end deftypefn

@deftypefn Signal void GtkWidget::draw (GtkWidget *@var{widget}, GdkRectangle *@var{area})
@end deftypefn

@deftypefn Signal void GtkWidget::draw_focus (GtkWidget *@var{widget})
@end deftypefn

@deftypefn Signal void GtkWidget::draw_default (GtkWidget *@var{widget})
@end deftypefn

@deftypefn Signal void GtkWidget::size_request (GtkWidget *@var{widget}, GtkRequisition *@var{requisition})
@end deftypefn

@deftypefn Signal void GtkWidget::size_allocate (GtkWidget *@var{widget}, GtkAllocation *@var{allocation})
@end deftypefn

@deftypefn Signal void GtkWidget::state_changed (GtkWidget *@var{widget})
@end deftypefn

@deftypefn Signal gint GtkWidget::install_accelerator (GtkWidget *@var{widget}, gchar *@var{signal_name}, gchar @var{key}, guint8 @var{modifiers})
@end deftypefn

@deftypefn Signal void GtkWidget::remove_accelerator (GtkWidget *@var{widget}, gchar *@var{signal_name})
@end deftypefn

@deftypefn Signal gint GtkWidget::event (GtkWidget *@var{widget}, GdkEvent *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::button_press_event (GtkWidget *@var{widget}, GdkEventButton *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::button_release_event (GtkWidget *@var{widget}, GdkEventButton *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::motion_notify_event (GtkWidget *@var{widget}, GdkEventMotion *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::delete_event (GtkWidget *@var{widget}, GdkEventAny *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::destroy_event (GtkWidget *@var{widget}, GdkEventAny *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::expose_event (GtkWidget *@var{widget}, GdkEventExpose *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::key_press_event (GtkWidget *@var{widget}, GdkEventKey *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::key_release_event (GtkWidget *@var{widget}, GdkEventKey *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::enter_notify_event (GtkWidget *@var{widget}, GdkEventCrossing *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::leave_notify_event (GtkWidget *@var{widget}, GdkEventCrossing *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::configure_event (GtkWidget *@var{widget}, GdkEventConfigure *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::focus_in_event (GtkWidget *@var{widget}, GdkEventFocus *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::focus_out_event (GtkWidget *@var{widget}, GdkEventFocus *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::map_event (GtkWidget *@var{widget}, GdkEventAny *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::unmap_event (GtkWidget *@var{widget}, GdkEventAny *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::property_notify_event (GtkWidget *@var{widget}, GdkEventProperty *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::selection_clear_event (GtkWidget *@var{widget}, GdkEventSelection *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::selection_request_event (GtkWidget *@var{widget}, GdkEventSelection *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::selection_notify_event (GtkWidget *@var{widget}, GdkEventSelection *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::drop_event (GtkWidget *@var{widget}, GdkEventDrop *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::drag_begin_event (GtkWidget *@var{widget}, GdkEventDragBegin *@var{event})
@end deftypefn

@deftypefn Signal gint GtkWidget::other_event (GtkWidget *@var{widget}, GdkEventOther *@var{event})
@end deftypefn

@subsection Functions

@deftypefun guint gtk_widget_get_type (void)
Returns the @code{GtkWidget} type identifier.
@end deftypefun

@deftypefun void gtk_widget_class_init (GtkWidgetClass *@var{class})
@end deftypefun

@deftypefun void gtk_widget_init (GtkWidget *@var{widget})
@end deftypefun

@deftypefun void gtk_widget_destroy (GtkWidget *@var{widget})
@end deftypefun

@deftypefun void gtk_widget_show (GtkWidget *@var{widget})
@end deftypefun

@deftypefun void gtk_widget_hide (GtkWidget *@var{widget})
@end deftypefun

@deftypefun void gtk_widget_map (GtkWidget *@var{widget})
@end deftypefun

@deftypefun void gtk_widget_unmap (GtkWidget *@var{widget})
@end deftypefun

@deftypefun void gtk_widget_realize (GtkWidget *@var{widget})
@end deftypefun

@deftypefun void gtk_widget_unrealize (GtkWidget *@var{widget})
@end deftypefun

@deftypefun void gtk_widget_draw (GtkWidget *@var{widget}, GdkRectangle *@var{area})
@end deftypefun

@deftypefun void gtk_widget_draw_focus (GtkWidget *@var{widget})
@end deftypefun

@deftypefun void gtk_widget_draw_children (GtkWidget *@var{widget})
@end deftypefun

@deftypefun void gtk_widget_size_request (GtkWidget *@var{widget}, GtkRequisition *@var{requisition})
@end deftypefun

@deftypefun void gtk_widget_size_allocate (GtkWidget *@var{widget}, GtkAllocation *@var{allocation})
@end deftypefun

@deftypefun void gtk_widget_install_accelerator (GtkWidget *@var{widget}, GtkAcceleratorTable *@var{table}, gchar *@var{signal_name}, gchar @var{key}, guint8 @var{modifiers})
@end deftypefun

@deftypefun void gtk_widget_remove_accelerator (GtkWidget *@var{widget}, GtkAcceleratorTable *@var{table}, gchar *@var{signal_name})
@end deftypefun

@deftypefun gint gtk_widget_event (GtkWidget *@var{widget}, GdkEvent *@var{event})
@end deftypefun

@deftypefun void gtk_widget_reparent (GtkWidget *@var{widget}, GtkWidget *@var{new_parent})
@end deftypefun

@deftypefun void gtk_widget_popup (GtkWidget *@var{widget}, gint @var{x}, gint @var{y})
@end deftypefun

@deftypefun gint gtk_widget_intersect (GtkWidget *@var{widget}, GdkRectangle *@var{area}, GdkRectangle *@var{intersection})
@end deftypefun

@deftypefun void gtk_widget_grab_focus (GtkWidget *@var{widget})
@end deftypefun

@deftypefun void gtk_widget_grab_default (GtkWidget *@var{widget})
@end deftypefun

@deftypefun void gtk_widget_restore_state (GtkWidget *@var{widget})
@end deftypefun

@deftypefun void gtk_widget_set_name (GtkWidget *@var{widget}, gchar *@var{name})
@end deftypefun

@deftypefun void gtk_widget_set_state (GtkWidget *@var{widget}, GtkStateType @var{state})
@end deftypefun

@deftypefun void gtk_widget_set_sensitive (GtkWidget *@var{widget}, gint sensitive)
@end deftypefun

@deftypefun void gtk_widget_set_parent (GtkWidget *@var{widget}, GtkWidget *@var{parent})
@end deftypefun

@deftypefun void gtk_widget_set_style (GtkWidget *@var{widget}, GtkStyle *@var{style})
@end deftypefun

@deftypefun void gtk_widget_set_uposition (GtkWidget *@var{widget}, gint @var{x}, gint @var{y})
@end deftypefun

@deftypefun void gtk_widget_set_usize (GtkWidget *@var{widget}, gint @var{width}, gint @var{height})
@end deftypefun

@deftypefun GtkWidget* gtk_widget_get_toplevel (GtkWidget *@var{widget})
@end deftypefun

@deftypefun GtkWidget* gtk_widget_get_ancestor (GtkWidget *@var{widget}, gint @var{type})
@end deftypefun

@deftypefun GdkColormap* gtk_widget_get_colormap (GtkWidget *@var{widget})
@end deftypefun

@deftypefun GdkVisual* gtk_widget_get_visual (GtkWidget *@var{visual})
@end deftypefun

@deftypefun GtkStyle* gtk_widget_get_style (GtkWidget *@var{style})
@end deftypefun

@gtkstdmacros{Widget, WIDGET}


@page
@node GtkWindow,  , GtkWidget, Widgets
@comment node-name, next, previous, up
@section The window widget


@subsection Description

@subsection Options

@defopt type
The @var{type} options specify how this widget will interact with the 
window manager. Currently the following types and the effect they have
on the window to window manager interaction is as follows.
@itemize @bullet

@item
@code{GTK_WINDOW_TOPLEVEL}
@itemize @bullet
@item
The option @code{GTK_WINDOW_TOPLEVEL} is usually used for the main application
window that will remain for the entire application run.
@end itemize
@item
@code{GTK_WINDOW_DIALOG}
@itemize @bullet
@item
The option @code{GTK_WINDOW_DIALOG} is usually used for transient
windows. These windows will open up, gather some input or provide some 
application specific updates, then close. The window manager is free not
to provide all the 'normal' window functions to this window.
@end itemize
@item
@code{GTK_WINDOW_POPUP}
@itemize @bullet
@item
The option @code{GTK_WINDOW_POPUP} is usually used for transient windows.
These windows are typically used for when no user interaction is required,
to notify the user of some condition. Other uses for these types of windows
are for 'about windows', startup windows and the like. Typically the window
manager will @strong{not} provide the usual widgets that surround the 
window. At the most all that will be provided is a border. Also note that
windows that set this @var{type} will not be in any window list of the window
manager. Though this window will @strong{not} get the kill and close widgets
of the window manager they still can receive said events and should be 
taken into account.
@end itemize
@end itemize
@end defopt

@defopt title
The @var{title} option will set the title of the window in the window manager.
@strong{Note:} On windows that have the @var{type} option set to 
@code{GTK_WINDOW_POPUP} there is a strong possibility that this will text
will not be seen.
@end defopt

@defopt position
The @var{position} option will determine where the window will be displayed
when it is finally drawn to the screen. Currently the following positions 
 and the effect they have on window placement can be specified.

@itemize @bullet

@item
@code{GTK_WIN_POS_NONE}
@itemize @bullet
@item
This @var{position} type will allow the window manager full freedom, depending
on the current settings in the window manager. As to where the window will
be placed.
@end itemize
@item
@code{GTK_WIN_POS_CENTER}
@itemize @bullet
@item
This @var{position} option will cause the window to center itself on the 
the screen. This option setting will take into account the @var{virtual screen}
size when calculating the center. This is @strong{not} the same as the 
@var{virtual desktop} setting of many window managers. It will center itself
on the current @var{virtual desktop}.
@end itemize
@item
@code{GTK_WIN_POS_MOUSE}
@itemize @bullet
This @var{position} option will cause the window to center itself under the 
mouse pointers' current location. Typical uses for this setting is in 
warning/error/informational dialogs where user interaction is desired.
@end itemize
@end itemize
@end defopt


@subsection Signals

@deftypefn Signal void GtkWindow::move_resize (GtkWindow *@var{window}, gint *@var{x}, gint *@var{y}, gint @var{width}, gint @var{height})
@end deftypefn

@deftypefn Signal void GtkWindow::set_focus (GtkWindow *@var{window}, GtkWidget *@var{focus})
@end deftypefn

@subsection Functions

@deftypefun guint gtk_window_get_type (void)
Returns the @code{GtkWindow} type identifier.
@end deftypefun

@deftypefun GtkWidget* gtk_window_new (GtkWindowType @var{type})
Create a new @code{GtkWindow} object. The new widget is returned as a 
pointer to a @code{GtkWidget} object. @code{NULL} is returned on failure.
The @var{type} can be one of @code{GTK_WINDOW_TOPLEVEL}, 
@code{GTK_WINDOW_DIALOG} or, @code{GTK_WINDOW_POPUP}. The @var{type} 
value determines how this widget will interact with the window manager.
@end deftypefun

@deftypefun void gtk_window_set_title (GtkWindow *@var{window}, gchar *@var{title})
Set the title of this window to the text in the @var{title} argument. It is 
important to not set the fields of the @code{GtkWindow} structure directly.
@end deftypefun

@deftypefun void gtk_window_set_focus (GtkWindow *@var{window}, GtkWidget *@var{focus})
@end deftypefun

@deftypefun void gtk_window_set_default (GtkWindow *@var{window}, GtkWidget *@var{defaultw})
@end deftypefun

@deftypefun void gtk_window_set_policy (GtkWindow *@var{window}, gint @var{allow_shrink}, gint @var{allow_grow}, gint @var{auto_shrink})
@end deftypefun

@deftypefun void gtk_window_add_accelerator_table (GtkWindow *@var{window}, GtkAcceleratorTable *@var{table})
@end deftypefun

@deftypefun void gtk_window_remove_accelerator_table (GtkWindow *@var{window}, GtkAcceleratorTable *@var{table})
@end deftypefun

@deftypefun void gtk_window_position (GtkWindow *@var{window}, GtkWindowPosition @var{position})
Set the position that the window will be at when it is finally drawn to the
screen. The @var{position} argument effects the the position as described
above.
@end deftypefun

@gtkstdmacros{Window, WINDOW}


@node Other Objects, Miscellaneous, Widgets, Top
@comment node-name, next, previous, up
@chapter Utility objects


@menu
* GtkAcceleratorTable::         The accelerator table object.
* GtkAdjustment::               The adjustment object.
* GtkGC::                       The GC object.
* GtkData::                     The data object.
* GtkStyle::                    The style object.
@end menu


@node GtkAcceleratorTable, GtkAdjustment, Other Objects, Other Objects
@comment node-name, next, previous, up
@section The accelerator table object

@subsection Description

@subsection Functions

@deftypefun GtkAcceleratorTable* gtk_accelerator_table_new (void)
@end deftypefun

@deftypefun GtkAcceleratorTable* gtk_accelerator_table_find (GtkObject *@var{object}, gchar *@var{signal_name}, guchar @var{accelerator_key}, guint8 @var{accelerator_mods})
@end deftypefun

@deftypefun GtkAccelerator *gtk_accelerator_table_ref (GtkAcceleratorTable *@var{table})
@end deftypefun

@deftypefun void gtk_accelerator_table_unref (GtkAcceleratorTable *@var{table})
@end deftypefun

@deftypefun void gtk_accelerator_table_install (GtkAcceleratorTable *@var{table}, GtkObject *@var{object}, gchar *@var{signal_name}, guchar @var{accelerator_key}, guint8 @var{accelerator_mods})
@end deftypefun

@deftypefun void gtk_accelerator_table_remove (GtkAcceleratorTable *@var{table}, GtkObject *@var{object}, gchar *@var{signal_name})
@end deftypefun

@deftypefun void gtk_accelerator_table_check (GtkAcceleratorTable *@var{table}, guchar @var{accelerator_key}, guint8 @var{accelerator_mods})
@end deftypefun

@deftypefun void gtk_accelerator_table_set_mod_mask (GtkAcceleratorTable *@var{table}, guint8 @var{modifier_mask})
@end deftypefun

@page
@node GtkAdjustment, GtkGC, GtkAcceleratorTable, Other Objects
@comment node-name, next, previous, up
@section The adjustment object

@subsection Description

@subsection Functions

@deftypefun guint gtk_adjustment_get_type (void)
Returns the @code{GtkAdjustment} type identifier.
@end deftypefun

@deftypefun GtkObject* gtk_adjustment_new (gfloat @var{value}, gfloat @var{lower}, gfloat @var{upper}, gfloat @var{step_increment}, gfloat @var{page_increment}, gfloat @var{page_size})
@end deftypefun

@gtkstdmacros{GtkAdjustment, ADJUSTMENT}

@page
@node GtkGC, GtkData, GtkAdjustment, Other Objects
@section The GC object

@subsection Description

@subsection Functions

@deftypefun GdkGC* gtk_gc_get (gint @var{depth}, GdkColormap *@var{colormap}, GdkGCValues *@var{values}, GdkGCValuesMask @var{values_mask})
@end deftypefun

@deftypefun void gtk_gc_release (GdkGC *@var{gc})
@end deftypefun

@page
@node GtkData, GtkStyle, GtkGC, Other Objects
@comment node-name, next, previous, up
@section The data object

@subsection Description

@subsection Functions

@deftypefun guint gtk_data_get_type (void)
Returns the @code{GtkData} type identifier.
@end deftypefun

@gtkstdmacros{Data, DATA}
@page
@node GtkStyle,  , GtkData, Other Objects
@section The style object

@subsection Description

@subsection Functions

@page
@node Miscellaneous, Examples, Other Objects, Top
@comment node-name, next, previous, up
@chapter Initialization, exit and other features


@menu
* Initialization and exit::     Initializing and exiting GTK.
* Customization::               Customizing the library.
* Menu Factories::              Simplified menu creation.
* Tree Factories::              Simplified tree creation.
* Tool Tips::                   Pop up help mechanism.
* Resource Files::              Resource files.
* Standard Macros::             Macros defined by all objects.
@end menu


@node Initialization and exit, Customization, Miscellaneous, Miscellaneous
@comment node-name, next, previous, up
@section Initializing and exiting GTK

@subsection Initializing
Before any GTK functions can be utilized the library must be initialized. This
can be accomplished by calling the @code{gtk_init} function. The arguments
you pass to this function should be the same arguments that were passed to
your application. This function will parse the arguments that it understands
and handle initializing the GDK library for you.

@subsection Exiting

@subsection Functions

@deftypefun void gtk_init (int *@var{argc}, char **@var{argv})
Function to initialize GTK and GDK for you. This function will remove any
command line arguments from @var{argc} and @var{argv} that it understands.

@example
int main (int argc, char *argv[])
@{
   @dots{Any local variables or non GTK/GDK initialization}

   /* Initialize GTK. */
   gtk_init(&argc, &argc);
   
@}
@end example
@end deftypefun

@deftypefun void gtk_exit (int @var{error_code})
Exit GTK and perform any necessary cleanup. @code{gtk_exit} will call the
systems @code{exit} function passing @var{error_code} as the parameter.
@end deftypefun

@deftypefun gint gtk_events_pending (void)
Returns the number of events pending on the event queue.
@end deftypefun

@deftypefun void gtk_main (void)
@end deftypefun

@deftypefun guint gtk_main_level (void)
@end deftypefun

@deftypefun void gtk_main_quit (void)
A call to this function will cause the @code{gtk_main} function to exit, 
thereby allowing your application to exit.
@end deftypefun

@page
@node Customization, Menu Factories, Initialization and exit, Miscellaneous
@comment node-name, next, previous, up
@section Customization of the library

@subsection Description
Like other X-windows applications the GTK library provides a way for the
user and application programmer to change the colors of just about any widget. 
You can also specify what pixmap should be tiled onto the background of some
widgets. All this is handled through a similar method as in the standard 
X-windows environment, through the use of 'rc' files. The format and 
functions available in these files is discussed below.

@subsection Functions
The following functions are available to handle the rc files.

@deftypefun void gtk_rc_parse (char *@var{filename})
This function will parse the @var{filename} that is passed to it as its 
argument. It will use the style settings for the widget types defined there.
@end deftypefun

@deftypefun void gtk_rc_init (void)
This function will initialize the rc file parser, normally this need not
be called directly as the @code{gtk_rc_parse} function will handle this for
you.
@end deftypefun

@page
@node Menu Factories, Tree Factories, Customization, Miscellaneous
@comment node-name, next, previous, up
@section Simplified menu creation

@page
@node Tree Factories, Tool Tips, Menu Factories, Miscellaneous
@comment node-name, next, previous, up
@section Simplified tree creation

@page
@node Tool Tips, Resource Files, Tree Factories, Miscellaneous
@comment node-name, next, previous, up
@section Pop up help mechanism

@subsection Description

@page
@node Resource Files, Standard Macros, Tool Tips, Miscellaneous
@comment node-name, next, previous, up
@section Resource Files

@page
@node Standard Macros,  , Resource Files, Miscellaneous
@comment node-name, next, previous, up
@section Macros defined by all objects

There are three macros that are defined by all object types. The first
two are used for performing casts and the last is for querying whether
an object is of a particular type. These macros are both conveniences
and debugging tools. If the GTK library was compiled with @code{NDEBUG}
defined as a preprocessor symbol (via the -DNDEBUG to cc), then the
macros check the object type and emit a warning if the cast is
invalid. Doing such checking is fairly expensive since the cast macros
are used everywhere in GTK and would normally be turned off in a public
release of a product. Note: The functions below are indeed macros, but
they may be considered functions for most purposes.

@deftypefun Gtk<ObjectType>* GTK_<OBJECT_TYPE> (gpointer @var{obj})
Cast a generic pointer to @code{Gtk<ObjectType>*}. This function is
provided in order to be able to provide checking during development
stages of code development since it is possible to examine the actual
type of object (using @code{gtk_type_is_a}) before performing the cast.
@end deftypefun

@deftypefun Gtk<ObjectType>Class* GTK_<OBJECT_TYPE>_CLASS (gpointer @var{class})
Cast a generic pointer to @code{Gtk<ObjectType>Class*}. Like
@code{GTK_<ObjectType>}, this function is, in reality, a macro.
@end deftypefun

@deftypefun gint GTK_IS_<ObjectType> (gpointer @var{obj})
Determine if a generic pointer refers to a @code{Gtk<ObjectType>}
object. This function is, in reality, a macro wrapper around the
@code{gtk_type_is_a} function (@pxref{Types}).
@end deftypefun


@node Examples, Object Implementation, Miscellaneous, Top
@comment node-name, next, previous, up
@chapter Using GTK
@cindex Using GTK

@menu
* Simple::                      The simplest GTK program.
* Hello World::                 Hello world in GTK.
* Hello World II::              An enhanced hello world.
* Hello World III::             Making Hello World II robust.
@end menu


@node Simple, Hello World, Examples, Examples
@comment node-name, next, previous, up
@section The simplest GTK program


The 16 line GTK program shown below is just about the simplest possible
program which uses GTK. (Well, technically, you don't have to create the
window and it would still be a program which uses GTK). The program,
when compiled and run, will create a single window 200x200 pixels in
size. The program does not exit until its is explicitly killed using the
shell or a window manager function.

@example
#include <gtk/gtk.h>

int
main (int argc, char *argv[])
@{
  GtkWidget *window;

  gtk_init (&argc, &argv);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_widget_show (window);

  gtk_main ();

  return 0;
@}
@end example

The first point of interest in this program is the standard
initialization line.

@example
  gtk_init (&argc, &argv);
@end example

Almost every GTK program will contain such a line. GTK will initialize
itself and GDK and remove any command line arguments it recognizes from
@var{argc} and @var{argv}.

The next two lines of code create and display a window.

@example
  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_widget_show (window);
@end example

The @code{GTK_WINDOW_TOPLEVEL} argument specifies that we want the
window to undergo window manager decoration and placement. One might be
lead to think that the window, since it has no children, would be 0x0
pixels in size. But, this is not the case because a window that has no
children defaults to 200x200 pixels in size. Mainly because 0x0 windows
are annoying to manipulate or even see in some cases.

The last line enters the GTK main processing loop.

@example
  gtk_main ();
@end example

Normally, @code{gtk_main} is called once and the program should exit
when it returns. @xref{Initialization and exit}.


@node Hello World, Hello World II, Simple, Examples
@comment node-name, next, previous, up
@section Hello world in GTK


@example
#include <gtk/gtk.h>

int
main (int argc, char *argv[])
@{
  GtkWidget *window;
  GtkWidget *label;

  gtk_init (&argc, &argv);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_container_border_width (GTK_CONTAINER (window), 10);

  label = gtk_label_new ("Hello World");
  gtk_container_add (GTK_CONTAINER (window), label);
  gtk_widget_show (label);

  gtk_widget_show (window);

  gtk_main ();

  return 0;
@}
@end example


@node Hello World II, Hello World III, Hello World, Examples
@comment node-name, next, previous, up
@section An enhanced hello world


@example
#include "gtk.h"

void
hello (void)
@{
  g_print ("Hello World\n");
  gtk_exit (0);
@}

int
main (int argc, char *argv[])
@{
  GtkWidget *window;
  GtkWidget *button;

  gtk_init (&argc, &argv);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_container_border_width (GTK_CONTAINER (window), 10);

  button = gtk_button_new_with_label ("Hello World");
  gtk_signal_connect (GTK_OBJECT (button), "clicked",
		      GTK_SIGNAL_FUNC (hello), NULL);
  gtk_container_add (GTK_CONTAINER (window), button);
  gtk_widget_show (button);

  gtk_widget_show (window);

  gtk_main ();

  return 0;
@}
@end example


@node Hello World III,  , Hello World II, Examples
@comment node-name, next, previous, up
@section Making Hello World II robust


@example
#include "gtk.h"

void
hello (void)
@{
  g_print ("Hello World\n");
  gtk_exit (0);
@}

void
destroy (void)
@{
  gtk_exit (0);
@}

int
main (int argc, char *argv[])
@{
  GtkWidget *window;
  GtkWidget *button;

  gtk_init (&argc, &argv);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_signal_connect (GTK_OBJECT (window), "destroy",
		      GTK_SIGNAL_FUNC (destroy), NULL);
  gtk_container_border_width (GTK_CONTAINER (window), 10);

  button = gtk_button_new_with_label ("Hello World");
  gtk_signal_connect (GTK_OBJECT (button), "clicked",
		      GTK_SIGNAL_FUNC (hello), NULL);
  gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
			     GTK_SIGNAL_FUNC (gtk_widget_destroy),
			     GTK_OBJECT (window));
  gtk_container_add (GTK_CONTAINER (window), button);
  gtk_widget_show (button);

  gtk_widget_show (window);

  gtk_main ();

  return 0;
@}
@end example


@node Object Implementation, Signal Implementation, Examples, Top
@comment node-name, next, previous, up
@chapter Object internals
@cindex Object Implementation

Objects (or the @code{GtkObject} type) and the class hierarchy in
general is implemented via a hierarchy of structs and type casting. Be
aware that when classes are mentioned it is the conceptual idea of
classes that is being referred to. GTK is written entirely in C which
provides no direct support for classes.

The first part to the class mechanism is the object fields. These are
fields that will be used on a per object basis. For example, the widget
type contains a field for the widgets parent. Every derived type needs a
reference to its parent type. A descendant class of @code{GtkObject}
would define itself like:

@example
struct Descendant
@{
  GtkObject object;

  @dots{}
@};
@end example

It is important to note that the @code{GtkObject} field needs to appear
first in the descendant type structure. This allows pointers to objects
of type @code{Descendant} to be cast to pointers to @code{GtkObject}'s
and vice-versa.

The second part to the class mechanism is the class fields. These fields
are defined on a per class basis. In the case of widgets, the class
fields are all the ``virtual'' functions for widgets. The
@code{GtkObject} class defines the @code{destroy} virtual function and
the necessary fields for the signal mechanism as well as a field for
determining the runtime type of an object. A virtual function is
semantically the same as it is in C++. That is, the actual function that
is called is determined based on the type of the object. Or, more
specifically, the actual function call depends on the class structure
that is pointed to by the @code{klass} field of the @code{GtkObject}
structure.

To see how the class fields work it is necessary to see the object
fields for a @code{GtkObject}. The @code{GtkObject} type is defined as
follows:

@example
typedef struct _GtkObject GtkObject;

struct _GtkObject
@{
  guint32 flags;
  GtkObjectClass *klass;
  gpointer object_data;
@};
@end example

The @code{class} field actually points to a class structure derived from
@code{GtkObjectClass}. By convention, each new type defines its own
class structure even if it is unnecessary. As an example, the
hypothetical @code{Descendant} class would define its class structure
as:

@example
struct DescendantClass
@{
  GtkObjectClass parent_class;

  @dots{}
@};
@end example

It is convention to name the parent class field (@code{GtkObjectClass}
in this case), @code{parent_class}. For the same reason as stated above
for the object structure, the parent class field must be the first field
in the class structure.

@strong{Note:} GTK assumes that the first field in a structure will be
placed by the compiler at the start of the structure. This is certainly
true for gcc, however, from my precursory reading of the C standard I
was unable to come to a definite conclusion as to whether this was
required or simply done for simplicity. I'm not too worried about this
assumption, though, as every C compiler I've ever encountered would work
with GTK.

The @code{flags} field of the @code{GtkObject} structure is used to keep
track of a relatively few object flags and is also used by the
@code{GtkWidget} type to store additional flags. At this time, the upper
16 bits of the flags field are reserved but unused.

The @code{object_data} field of the @code{GtkObject} structure is an
opaque pointer used by the object data mechanism. In truth, it is a
pointer to the beginning of the data list which is composed of the
following structures.

@example
typedef struct _GtkObjectData GtkObjectData;

struct _GtkObjectData
@{
  guint id;
  gpointer data;
  GtkObjectData *next;
@};
@end example

The data mechanism allows arbitrary data to be associated with a
character string key in any object. A hash table is used to transform
the character string key into the data id and then a search through the
list is made to see if the data exists. The assumption being that the
data list will usually be short and therefore a linear search is
OK. Future work on the data mechanism might make use of a resizable
array instead of a linked list. This would shrink the overhead of the
@code{GtkObjectData} structure by 4 bytes on 32 bit architectures.


@node Signal Implementation, Widget Implementation, Object Implementation, Top
@comment node-name, next, previous, up
@chapter Signal internals
@cindex Signal Implementation


@node Widget Implementation, Function Index, Signal Implementation, Top
@comment node-name, next, previous, up
@chapter Widget internals
@cindex Widget Implementation


@node Function Index, Concept Index, Widget Implementation, Top
@comment node-name, next, previous, up
@unnumbered Function Index

@printindex fn


@node Concept Index,  , Function Index, Top
@comment node-name, next, previous, up
@unnumbered Concept Index

@printindex cp


@summarycontents
@contents
@bye

@c  LocalWords:  Gtk API formalistic