\input texinfo @c -*-texinfo-*- @c Copyright (C) 1996 by Peter Mattis. All rights reserved. @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 29 January 1998 @set update-month January 1998 @ifinfo This file documents GTK, the General 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 General Toolkit @subtitle Version @value{edition} @subtitle @value{update-month} @author by Peter Mattis @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 General Toolkit @end direntry @node Top, Copying, (dir), (dir) @top The General Toolkit @ifinfo This is edition @value{edition} of the GTK documentation, @w{@value{update-date}}. @end ifinfo @c FIXME: Do a introduction to the GTK? @menu * Copying:: Your rights. * Overview:: What is GTK? * Objects:: Object overview. * 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 my 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 accompanies it. @node Overview, Objects, 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. @node Objects, Signals, Overview, Top @comment node-name, next, previous, up @chapter Object Overview @cindex Objects GTK implements a semi-simple class mechanism and an associated class hierarchy for widgets and several other useful objects. The GtkObject type is the root of the class hierarchy. It provides a few items needed by all classes, the foundation for the signal (@pxref{Signals}) mechanism and the ``destroy'' method. The class hierarchy is defined by a type hierarchy. This hierarchy allows queries to be made in regards to a type. The basic query that can be performed is asking whether a given type has an ``is a'' relation with another type. For instance, it is common to ask whether a general widget pointer is a type of specific widget so that runtime sanity checks can be made. @section Type utility functions 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; GtkArgSetFunc arg_set_func; GtkArgGetFunc arg_get_func; @} @end example @itemize @bullet @item The @code{type_name} field refers to the name of the type. It is convention for the type name to be the same as the C structure type. For example, the type name of the @code{GtkObject} structure is ``GtkObject''. @item The @code{object_size} field refers to the size in bytes of the C 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)}. @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. @item The @code{class_init_func} field is a callback which is used by the type mechanism to initialize class specific fields. The single argument this function takes is a pointer to a class structure. @item The @code{object_init_func} field is a callback which is used by the type mechanism to initialize object specific fields. The single argument this functions takes is a pointer to an object structure. @c FIXME!! Document the arg_set_func and arg_get_func.. @end itemize @deftypefun guint gtk_type_unique (guint @var{parent_type}, GtkTypeInfo *@var{type_info}) The @var{parent_type} is simply the value of the new types parent type. If @var{parent_type} is 0, then the new type is the root of the type hierarchy. @var{type_info} is a pointer to a structure which contains necessary information for construction of the new type. Specifically, the @code{type_name}, @code{object_size} and @code{class_size} fields are required. The @code{class_init_func}, @code{object_init_func} and @code{value_init_func} fields may be NULL. @end deftypefun @deftypefun gchar* gtk_type_name (guint @var{type}) The returned string is the name of @var{type} as specified to @code{gtk_type_unique}. @end deftypefun @deftypefun guint gtk_type_from_name (guchar *@var{name}) Return the type associated with @var{name}. If there is no type associated with @var{name}, then 0 will be returned. @end deftypefun @deftypefun guint gtk_type_parent (guint @var{type}) Returns the parent type of @var{type} or 0 if @var{type} is the root of the type hierarchy. @end deftypefun @deftypefun gpointer gtk_type_class (guint @var{type}) Returns the initialized class structure for @var{type}. The class structure is actually created and initialized the first time it is needed. If creation and initialization occurs, the @code{class_size} field of the @code{GtkTypeInfo} structure used to initialize this type is used to determine how large the class structure is. The @code{class_init_func} field from the @code{GtkTypeInfo} structure is called for all the members in the types ancestry, including the type. The order of this invocation proceeds from the root on down. For example, the @code{GtkWidgetClass} is first initialized as an @code{GtkObjectClass} by the object class initialization routine and then by the widget class initialization routine. This allows the widget class initialization routine to override values set by the object class 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 (guint @var{type}) Returns a new instance of an @var{type} object. The object structure is created and initialized similarly to the class structure (as described above). The @code{object_size} and @code{object_init_func} fields of the @code{GtkTypeInfo} structure are used to determine the objects allocated size and the object specific initialization routine. Similarly to the class initialization, all the object initialization routines from the root on down to the particular type being created are invoked. @end deftypefun @deftypefun void gtk_type_describe_heritage (guint @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 (guint @var{type}, gint @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 gint gtk_type_is_a (guint @var{type}, guint @var{is_a_type}) A predicate function which determines whether the relation @var{type} is_a @var{is_a_type} is true. @end deftypefun @deftypefun void gtk_type_get_arg (GtkObject *@var{object}, GtkType @var{type}, GtkArg *@var{arg}, guint @var{arg_id}) @end deftypefun @deftypefun void gtk_type_set_arg (GtkObject *@var{object}, GtkType @var{type}, GtkArg *@var{arg}, guint @var{arg_id}) @end deftypefun @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. * GtkCurve:: The 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, GtkGammaCurve, GtkCurve, 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 GtkCurve, GtkGammaCurve, GtkDialog, GtkContainer, 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, GtkCurve, GtkDialog, GtkContainer, 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, GtkCurve, 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 Enter text into this widget. Derived from @pxref{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* GTK_ (gpointer @var{obj}) Cast a generic pointer to @code{Gtk*}. 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 GtkClass* GTK__CLASS (gpointer @var{class}) Cast a generic pointer to @code{GtkClass*}. Like @code{GTK_}, this function is, in reality, a macro. @end deftypefun @deftypefun gint GTK_IS_ (gpointer @var{obj}) Determine if a generic pointer refers to a @code{Gtk} object. This function is, in reality, a macro wrapper around the @code{gtk_type_is_a} function (@pxref{Objects}). @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 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 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