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docs/tutorial/gtk-tut.sgml: Adopted chapter 21.3 "Creating a Composite

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Thu Jan 23 20:56:56 GMT 2003  Tony Gale <gale@gtk.org>
        * Sebastian Rittau  <srittau@jroger.in-berlin.de>:

           docs/tutorial/gtk-tut.sgml: Adopted chapter 21.3 "Creating a
           Composite widget" to modern standards. (I.e. use gobject instead of
           glib, derive from GtkTable instead of GtkVBox.) Bugzilla #103869.

        * docs/tutorial/gtk-tut.sgml, examples/tictactoe: Fixup tic-tac-toe
        code in Appendix C to reflect above changes.

        * examples/rangewidgets/rangewidgets.c: From Roger Leigh
        auto resize on page size change
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GMT 2003 Tony Gale 2003-01-23 21:07:42 +00:00 committed by Tony Gale
parent 06116092cf
commit c4b771b8e5
8 changed files with 290 additions and 235 deletions
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13
ChangeLog
View File

@ -1,3 +1,16 @@
Thu Jan 23 20:56:56 GMT 2003 Tony Gale <gale@gtk.org>
* Sebastian Rittau <srittau@jroger.in-berlin.de>:
docs/tutorial/gtk-tut.sgml: Adopted chapter 21.3 "Creating a
Composite widget" to modern standards. (I.e. use gobject instead of
glib, derive from GtkTable instead of GtkVBox.) Bugzilla #103869.
* docs/tutorial/gtk-tut.sgml, examples/tictactoe: Fixup tic-tac-toe
code in Appendix C to reflect above changes.
* examples/rangewidgets/rangewidgets.c: From Roger Leigh
auto resize on page size change
2003-01-23 Daniel Elstner <daniel.elstner@gmx.net>
* gtk/gtktoolbar.c (gtk_toolbar_hide_all): Override hide_all

13
ChangeLog.pre-2-10
View File

@ -1,3 +1,16 @@
Thu Jan 23 20:56:56 GMT 2003 Tony Gale <gale@gtk.org>
* Sebastian Rittau <srittau@jroger.in-berlin.de>:
docs/tutorial/gtk-tut.sgml: Adopted chapter 21.3 "Creating a
Composite widget" to modern standards. (I.e. use gobject instead of
glib, derive from GtkTable instead of GtkVBox.) Bugzilla #103869.
* docs/tutorial/gtk-tut.sgml, examples/tictactoe: Fixup tic-tac-toe
code in Appendix C to reflect above changes.
* examples/rangewidgets/rangewidgets.c: From Roger Leigh
auto resize on page size change
2003-01-23 Daniel Elstner <daniel.elstner@gmx.net>
* gtk/gtktoolbar.c (gtk_toolbar_hide_all): Override hide_all

13
ChangeLog.pre-2-4
View File

@ -1,3 +1,16 @@
Thu Jan 23 20:56:56 GMT 2003 Tony Gale <gale@gtk.org>
* Sebastian Rittau <srittau@jroger.in-berlin.de>:
docs/tutorial/gtk-tut.sgml: Adopted chapter 21.3 "Creating a
Composite widget" to modern standards. (I.e. use gobject instead of
glib, derive from GtkTable instead of GtkVBox.) Bugzilla #103869.
* docs/tutorial/gtk-tut.sgml, examples/tictactoe: Fixup tic-tac-toe
code in Appendix C to reflect above changes.
* examples/rangewidgets/rangewidgets.c: From Roger Leigh
auto resize on page size change
2003-01-23 Daniel Elstner <daniel.elstner@gmx.net>
* gtk/gtktoolbar.c (gtk_toolbar_hide_all): Override hide_all

13
ChangeLog.pre-2-6
View File

@ -1,3 +1,16 @@
Thu Jan 23 20:56:56 GMT 2003 Tony Gale <gale@gtk.org>
* Sebastian Rittau <srittau@jroger.in-berlin.de>:
docs/tutorial/gtk-tut.sgml: Adopted chapter 21.3 "Creating a
Composite widget" to modern standards. (I.e. use gobject instead of
glib, derive from GtkTable instead of GtkVBox.) Bugzilla #103869.
* docs/tutorial/gtk-tut.sgml, examples/tictactoe: Fixup tic-tac-toe
code in Appendix C to reflect above changes.
* examples/rangewidgets/rangewidgets.c: From Roger Leigh
auto resize on page size change
2003-01-23 Daniel Elstner <daniel.elstner@gmx.net>
* gtk/gtktoolbar.c (gtk_toolbar_hide_all): Override hide_all

13
ChangeLog.pre-2-8
View File

@ -1,3 +1,16 @@
Thu Jan 23 20:56:56 GMT 2003 Tony Gale <gale@gtk.org>
* Sebastian Rittau <srittau@jroger.in-berlin.de>:
docs/tutorial/gtk-tut.sgml: Adopted chapter 21.3 "Creating a
Composite widget" to modern standards. (I.e. use gobject instead of
glib, derive from GtkTable instead of GtkVBox.) Bugzilla #103869.
* docs/tutorial/gtk-tut.sgml, examples/tictactoe: Fixup tic-tac-toe
code in Appendix C to reflect above changes.
* examples/rangewidgets/rangewidgets.c: From Roger Leigh
auto resize on page size change
2003-01-23 Daniel Elstner <daniel.elstner@gmx.net>
* gtk/gtktoolbar.c (gtk_toolbar_hide_all): Override hide_all

434
docs/tutorial/gtk-tut.sgml
View File

@ -5,7 +5,7 @@
<book id="gtk-tut">
<bookinfo>
<date>January 15, 2003</date>
<date>January 23, 2003</date>
<title>GTK+ 2.0 Tutorial</title>
<authorgroup>
<author>
@ -3129,6 +3129,7 @@ void cb_page_size( GtkAdjustment *get,
gtk_adjustment_set_value (set, CLAMP (set->value,
set->lower,
(set->upper - set->page_size)));
g_signal_emit_by_name(G_OBJECT(set), "changed");
}
void cb_draw_value( GtkToggleButton *button )
@ -8963,9 +8964,9 @@ static void print_selected(gpointer callback_data,
/* Our menu, an array of GtkItemFactoryEntry structures that defines each menu item */
static GtkItemFactoryEntry menu_items[] = {
{ "/_File", NULL, NULL, 0, "&amp;lt;Branch&amp;gt;" },
{ "/File/_New", "&amp;lt;control&amp;gt;N", print_hello, 0, "&lt;Item&gt;" },
{ "/File/_Open", "&amp;lt;control&amp;gt;O", print_hello, 0, "&lt;Item&gt;" },
{ "/File/_Save", "&amp;lt;control&amp;gt;S", print_hello, 0, "&lt;Item&gt;" },
{ "/File/_New", "&amp;lt;control&amp;gt;N", print_hello, 0, "&lt;StockItem&gt;", GTK_STOCK_NEW },
{ "/File/_Open", "&amp;lt;control&amp;gt;O", print_hello, 0, "&lt;StockItem&gt;", GTK_STOCK_OPEN },
{ "/File/_Save", "&amp;lt;control&amp;gt;S", print_hello, 0, "&lt;StockItem&gt;", GTK_STOCK_SAVE },
{ "/File/Save _As", NULL, NULL, 0, "&lt;Item&gt;" },
{ "/File/sep1", NULL, NULL, 0, "&amp;lt;Separator&amp;gt;" },
{ "/File/_Quit", "&lt;CTRL&gt;Q", gtk_main_quit, 0, "&lt;StockItem&gt;", GTK_STOCK_QUIT },
@ -11096,19 +11097,7 @@ depressed. </para>
class that holds all of the elements of the composite widget. For
example, the parent class of the FileSelection widget is the
Dialog class. Since our buttons will be arranged in a table, it
might seem natural to make our parent class the Table
class. Unfortunately, this turns out not to work. The creation of a
widget is divided among two functions - a <literal>WIDGETNAME_new()</literal>
function that the user calls, and a <literal>WIDGETNAME_init()</literal> function
which does the basic work of initializing the widget which is
independent of the arguments passed to the <literal>_new()</literal>
function. Descendant widgets only call the <literal>_init</literal> function of
their parent widget. But this division of labor doesn't work well for
tables, which when created need to know the number of rows and
columns in the table. Unless we want to duplicate most of the
functionality of <literal>gtk_table_new()</literal> in our Tictactoe widget, we had
best avoid deriving it from Table. For that reason, we derive it
from VBox instead, and stick our table inside the VBox.</para>
is natural to make our parent class the Table class.</para>
</sect2>
@ -11116,8 +11105,8 @@ from VBox instead, and stick our table inside the VBox.</para>
<sect2>
<title>The header file</title>
<para>Each widget class has a header file which declares the object and
class structures for that widget, along with public functions.
<para>Each GObject class has a header file which declares the object and
class structures for that object, along with public functions.
A couple of features are worth pointing out. To prevent duplicate
definitions, we wrap the entire header file in:</para>
@ -11133,20 +11122,21 @@ definitions, we wrap the entire header file in:</para>
<para>And to keep C++ programs that include the header file happy, in:</para>
<programlisting role="C">
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#include &lt;glib.h&gt;
G_BEGIN_DECLS
.
.
.
#ifdef __cplusplus
}
#endif /* __cplusplus */
G_END_DECLS
</programlisting>
<para>Along with the functions and structures, we declare three standard
macros in our header file, <literal>TICTACTOE(obj)</literal>,
<literal>TICTACTOE_CLASS(klass)</literal>, and <literal>IS_TICTACTOE(obj)</literal>, which cast a
<para>Along with the functions and structures, we declare five standard
macros in our header file, <literal>TICTACTOE_TYPE</literal>,
<literal>TICTACTOE(obj)</literal>,
<literal>TICTACTOE_CLASS(klass)</literal>,
<literal>IS_TICTACTOE(obj)</literal>, and
<literal>IS_TICTACTOE_CLASS(klass)</literal>, which cast a
pointer into a pointer to the object or class structure, and check
if an object is a Tictactoe widget respectively.</para>
@ -11177,17 +11167,18 @@ if an object is a Tictactoe widget respectively.</para>
#define __TICTACTOE_H__
#include &lt;gdk/gdk.h&gt;
#include &lt;gtk/gtkvbox.h&gt;
#include &lt;glib.h&gt;
#include &lt;glib-object.h&gt;
#include &lt;gtk/gtktable.h&gt;
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
G_BEGIN_DECLS
#define TICTACTOE(obj) GTK_CHECK_CAST (obj, tictactoe_get_type (), Tictactoe)
#define TICTACTOE_CLASS(klass) GTK_CHECK_CLASS_CAST (klass, tictactoe_get_type (), TictactoeClass)
#define IS_TICTACTOE(obj) GTK_CHECK_TYPE (obj, tictactoe_get_type ())
#define TICTACTOE_TYPE (tictactoe_get_type ())
#define TICTACTOE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), TICTACTOE_TYPE, Tictactoe))
#define TICTACTOE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), TICTACTOE_TYPE, TictactoeClass))
#define IS_TICTACTOE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), TICTACTOE_TYPE))
#define IS_TICTACTOE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), TICTACTOE_TYPE))
typedef struct _Tictactoe Tictactoe;
@ -11195,25 +11186,23 @@ typedef struct _TictactoeClass TictactoeClass;
struct _Tictactoe
{
GtkVBox vbox;
GtkTable table;
GtkWidget *buttons[3][3];
};
struct _TictactoeClass
{
GtkVBoxClass parent_class;
GtkTableClass parent_class;
void (* tictactoe) (Tictactoe *ttt);
};
GtkType tictactoe_get_type (void);
GType tictactoe_get_type (void);
GtkWidget* tictactoe_new (void);
void tictactoe_clear (Tictactoe *ttt);
#ifdef __cplusplus
}
#endif /* __cplusplus */
G_END_DECLS
#endif /* __TICTACTOE_H__ */
@ -11227,59 +11216,73 @@ void tictactoe_clear (Tictactoe *ttt);
<title>The <literal>_get_type()</literal> function</title>
<para>We now continue on to the implementation of our widget. A core
function for every widget is the function
function for every object is the function
<literal>WIDGETNAME_get_type()</literal>. This function, when first called, tells
GTK about the widget class, and gets an ID that uniquely identifies
the widget class. Upon subsequent calls, it just returns the ID.</para>
Glib about the new class, and gets an ID that uniquely identifies
the class. Upon subsequent calls, it just returns the ID.</para>
<programlisting role="C">
GtkType
tictactoe_get_type ()
GType
tictactoe_get_type (void)
{
static guint ttt_type = 0;
static GType ttt_type = 0;
if (!ttt_type)
{
GtkTypeInfo ttt_info =
static const GTypeInfo ttt_info =
{
"Tictactoe",
sizeof (Tictactoe),
sizeof (TictactoeClass),
(GtkClassInitFunc) tictactoe_class_init,
(GtkObjectInitFunc) tictactoe_init,
(GtkArgSetFunc) NULL,
(GtkArgGetFunc) NULL
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) tictactoe_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (Tictactoe),
0, /* n_preallocs */
(GInstanceInitFunc) tictactoe_init,
};
ttt_type = gtk_type_unique (gtk_vbox_get_type (), &amp;ttt_info);
ttt_type = g_type_register_static (GTK_TYPE_TABLE,
"Tictactoe",
&amp;ttt_info,
0);
}
return ttt_type;
}
</programlisting>
<para>The GtkTypeInfo structure has the following definition:</para>
<para>The GTypeInfo structure has the following definition:</para>
<programlisting role="C">
struct _GtkTypeInfo
struct _GTypeInfo
{
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;
/* interface types, classed types, instantiated types */
guint16 class_size;
GBaseInitFunc base_init;
GBaseFinalizeFunc base_finalize;
/* classed types, instantiated types */
GClassInitFunc class_init;
GClassFinalizeFunc class_finalize;
gconstpointer class_data;
/* instantiated types */
guint16 instance_size;
guint16 n_preallocs;
GInstanceInitFunc instance_init;
/* value handling */
const GTypeValueTable *value_table;
};
</programlisting>
<para>The fields of this structure are pretty self-explanatory. We'll ignore
the <literal>arg_set_func</literal> and <literal>arg_get_func</literal> fields here: they have an important,
but as yet largely
unimplemented, role in allowing widget options to be conveniently set
from interpreted languages. Once GTK has a correctly filled in copy of
this structure, it knows how to create objects of a particular widget
type. </para>
<para>The important fields of this structure are pretty self-explanatory.
We'll ignore the <literal>base_init</literal> and
<literal>base_finalize</literal> as well as the <literal>vlaue_table</literal>
fields here. Once Glib has a correctly filled in copy of
this structure, it knows how to create objects of a particular type. </para>
</sect2>
@ -11301,22 +11304,15 @@ enum {
static gint tictactoe_signals[LAST_SIGNAL] = { 0 };
static void
tictactoe_class_init (TictactoeClass *class)
tictactoe_class_init (TictactoeClass *klass)
{
GtkObjectClass *object_class;
object_class = (GtkObjectClass*) class;
tictactoe_signals[TICTACTOE_SIGNAL] = gtk_signal_new ("tictactoe",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (TictactoeClass, tictactoe),
gtk_signal_default_marshaller, GTK_TYPE_NONE, 0);
gtk_object_class_add_signals (object_class, tictactoe_signals, LAST_SIGNAL);
class->tictactoe = NULL;
tictactoe_signals[TICTACTOE_SIGNAL] =
g_signal_new ("tictactoe",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (TictactoeClass, tictactoe),
NULL, NULL,
g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
}
</programlisting>
@ -11329,45 +11325,57 @@ things are going to get a bit complicated.</para>
<para>The function:</para>
<programlisting role="C">
gint gtk_signal_new( const gchar *name,
GtkSignalRunType run_type,
GtkType object_type,
gint function_offset,
GtkSignalMarshaller marshaller,
GtkType return_val,
guint nparams,
...);
guint g_signal_new( const gchar *signal_name,
GType itype,
GSignalFlags signal_flags,
guint class_offset,
GSignalAccumulator *accumulator,
gpointer accu_data,
GSignalCMarshaller *c_marshaller,
GType return_type,
guint n_params,
...);
</programlisting>
<para>Creates a new signal. The parameters are:</para>
<itemizedlist>
<listitem><simpara> <literal>name</literal>: The name of the signal.</simpara>
<listitem><simpara> <literal>signal_name</literal>: The name of the signal.</simpara>
</listitem>
<listitem><simpara> <literal>run_type</literal>: Whether the default handler runs before or after
user handlers. Usually this will be <literal>GTK_RUN_FIRST</literal>, or <literal>GTK_RUN_LAST</literal>,
although there are other possibilities.</simpara>
</listitem>
<listitem><simpara> <literal>object_type</literal>: The ID of the object that this signal applies
<listitem><simpara> <literal>itype</literal>: The ID of the object that this signal applies
to. (It will also apply to that objects descendants.)</simpara>
</listitem>
<listitem><simpara> <literal>signal_flags</literal>: Whether the default handler runs before or after
user handlers and other flags. Usually this will be one of
<literal>G_SIGNAL_RUN_FIRST</literal>, or <literal>G_SIGNAL_RUN_LAST</literal>,
although there are other possibilities. The flag
<literal>G_SIGNAL_ACTION</literal> specifies that no extra code needs to
run that performs special pre or post emission adjustments. This means that
ther signal can also be emitted from object external code.</simpara>
</listitem>
<listitem><simpara> <literal>function_offset</literal>: The offset within the class structure of
<listitem><simpara> <literal>class_offset</literal>: The offset within the class structure of
a pointer to the default handler.</simpara>
</listitem>
<listitem><simpara> <literal>marshaller</literal>: A function that is used to invoke the signal
<listitem><simpara> <literal>accumulator</literal>: For most classes this can
be set to NULL.</simpara></listitem>
<listitem><simpara> <literal>accu_data</literal>: User data that will be handed
to the accumulator function.</simpara></listitem>
<listitem><simpara> <literal>c_marshaller</literal>: A function that is used to invoke the signal
handler. For signal handlers that have no arguments other than the
object that emitted the signal and user data, we can use the
pre-supplied marshaller function <literal>gtk_signal_default_marshaller</literal>.</simpara>
pre-supplied marshaller function <literal>g_cclosure_marshal_VOID__VOID</literal>.</simpara>
</listitem>
<listitem><simpara> <literal>return_val</literal>: The type of the return val.</simpara>
<listitem><simpara> <literal>return_type</literal>: The type of the return value.</simpara>
</listitem>
<listitem><simpara> <literal>nparams</literal>: The number of parameters of the signal handler
<listitem><simpara> <literal>n_params</literal>: The number of parameters of the signal handler
(other than the two default ones mentioned above)</simpara>
</listitem>
@ -11375,60 +11383,46 @@ pre-supplied marshaller function <literal>gtk_signal_default_marshaller</literal
</listitem>
</itemizedlist>
<para>When specifying types, the <literal>GtkType</literal> enumeration is used:</para>
<para>When specifying types, the following standard types can be used:</para>
<programlisting role="C">
typedef enum
{
GTK_TYPE_INVALID,
GTK_TYPE_NONE,
GTK_TYPE_CHAR,
GTK_TYPE_BOOL,
GTK_TYPE_INT,
GTK_TYPE_UINT,
GTK_TYPE_LONG,
GTK_TYPE_ULONG,
GTK_TYPE_FLOAT,
GTK_TYPE_DOUBLE,
GTK_TYPE_STRING,
GTK_TYPE_ENUM,
GTK_TYPE_FLAGS,
GTK_TYPE_BOXED,
GTK_TYPE_FOREIGN,
GTK_TYPE_CALLBACK,
GTK_TYPE_ARGS,
GTK_TYPE_POINTER,
/* it'd be great if the next two could be removed eventually */
GTK_TYPE_SIGNAL,
GTK_TYPE_C_CALLBACK,
GTK_TYPE_OBJECT
} GtkFundamentalType;
G_TYPE_INVALID
G_TYPE_NONE
G_TYPE_INTERFACE
G_TYPE_CHAR
G_TYPE_UCHAR
G_TYPE_BOOLEAN
G_TYPE_INT
G_TYPE_UINT
G_TYPE_LONG
G_TYPE_ULONG
G_TYPE_INT64
G_TYPE_UINT64
G_TYPE_ENUM
G_TYPE_FLAGS
G_TYPE_FLOAT
G_TYPE_DOUBLE
G_TYPE_STRING
G_TYPE_POINTER
G_TYPE_BOXED
G_TYPE_PARAM
G_TYPE_OBJECT
</programlisting>
<para><literal>gtk_signal_new()</literal> returns a unique integer identifier for the
<para><literal>g_signal_new()</literal> returns a unique integer identifier for the
signal, that we store in the <literal>tictactoe_signals</literal> array, which we
index using an enumeration. (Conventionally, the enumeration elements
are the signal name, uppercased, but here there would be a conflict
with the <literal>TICTACTOE()</literal> macro, so we called it <literal>TICTACTOE_SIGNAL</literal>
instead.</para>
<para>After creating our signals, we need to tell GTK to associate our
signals with the Tictactoe class. We do that by calling
<literal>gtk_object_class_add_signals()</literal>. We then set the pointer which
points to the default handler for the "tictactoe" signal to NULL,
indicating that there is no default action.</para>
</sect2>
<!-- ----------------------------------------------------------------- -->
<sect2>
<title>The <literal>_init()</literal> function</title>
<para>Each widget class also needs a function to initialize the object
<para>Each class also needs a function to initialize the object
structure. Usually, this function has the fairly limited role of
setting the fields of the structure to default values. For composite
widgets, however, this function also creates the component widgets.</para>
@ -11437,21 +11431,19 @@ widgets, however, this function also creates the component widgets.</para>
static void
tictactoe_init (Tictactoe *ttt)
{
GtkWidget *table;
gint i,j;
table = gtk_table_new (3, 3, TRUE);
gtk_container_add (GTK_CONTAINER(ttt), table);
gtk_widget_show (table);
for (i=0;i<3; i++)
for (j=0;j<3; j++)
gtk_table_resize (GTK_TABLE (ttt), 3, 3);
gtk_table_set_homogeneous (GTK_TABLE (ttt), TRUE);
for (i=0;i&lt;3; i++)
for (j=0;j&lt;3; j++)
{
ttt->buttons[i][j] = gtk_toggle_button_new ();
gtk_table_attach_defaults (GTK_TABLE(table), ttt->buttons[i][j],
gtk_table_attach_defaults (GTK_TABLE (ttt), ttt->buttons[i][j],
i, i+1, j, j+1);
gtk_signal_connect (GTK_OBJECT (ttt->buttons[i][j]), "toggled",
GTK_SIGNAL_FUNC (tictactoe_toggle), ttt);
g_signal_connect (G_OBJECT (ttt->buttons[i][j]), "toggled",
G_CALLBACK (tictactoe_toggle), ttt);
gtk_widget_set_size_request (ttt->buttons[i][j], 20, 20);
gtk_widget_show (ttt->buttons[i][j]);
}
@ -11464,17 +11456,17 @@ tictactoe_init (Tictactoe *ttt)
<sect2>
<title>And the rest...</title>
<para>There is one more function that every widget (except for base widget
types like Bin that cannot be instantiated) needs to have - the
<para>There is one more function that every object (except for abstract
classes like Bin that cannot be instantiated) needs to have - the
function that the user calls to create an object of that type. This is
conventionally called <literal>WIDGETNAME_new()</literal>. In some
conventionally called <literal>OBJECTNAME_new()</literal>. In some
widgets, though not for the Tictactoe widgets, this function takes
arguments, and does some setup based on the arguments. The other two
functions are specific to the Tictactoe widget. </para>
<para><literal>tictactoe_clear()</literal> is a public function that resets all the
buttons in the widget to the up position. Note the use of
<literal>gtk_signal_handler_block_by_data()</literal> to keep our signal handler for
<literal>g_signal_handlers_block_matches()</literal> to keep our signal handler for
button toggles from being triggered unnecessarily.</para>
<para><literal>tictactoe_toggle()</literal> is the signal handler that is invoked when the
@ -11484,9 +11476,9 @@ the "tictactoe" signal.</para>
<programlisting role="C">
GtkWidget*
tictactoe_new ()
tictactoe_new (void)
{
return GTK_WIDGET ( gtk_type_new (tictactoe_get_type ()));
return GTK_WIDGET ( g_object_new (TICTACTOE_TYPE, NULL));
}
void
@ -11494,13 +11486,17 @@ tictactoe_clear (Tictactoe *ttt)
{
int i,j;
for (i=0;i<3;i++)
for (j=0;j<3;j++)
for (i=0;i&lt;3;i++)
for (j=0;j&lt;3;j++)
{
gtk_signal_handler_block_by_data (GTK_OBJECT(ttt->buttons[i][j]), ttt);
g_signal_handlers_block_matched (G_OBJECT (ttt->buttons[i][j]),
G_SIGNAL_MATCH_DATA,
0, 0, NULL, NULL, ttt);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (ttt->buttons[i][j]),
FALSE);
gtk_signal_handler_unblock_by_data (GTK_OBJECT(ttt->buttons[i][j]), ttt);
g_signal_handlers_unblock_matched (G_OBJECT (ttt->buttons[i][j]),
G_SIGNAL_MATCH_DATA,
0, 0, NULL, NULL, ttt);
}
}
@ -11518,12 +11514,12 @@ tictactoe_toggle (GtkWidget *widget, Tictactoe *ttt)
int success, found;
for (k=0; k<8; k++)
for (k=0; k&lt;8; k++)
{
success = TRUE;
found = FALSE;
for (i=0;i<3;i++)
for (i=0;i&lt;3;i++)
{
success = success &amp;&amp;
GTK_TOGGLE_BUTTON(ttt->buttons[rwins[k][i]][cwins[k][i]])->active;
@ -11533,8 +11529,8 @@ tictactoe_toggle (GtkWidget *widget, Tictactoe *ttt)
if (success &amp;&amp; found)
{
gtk_signal_emit (GTK_OBJECT (ttt),
tictactoe_signals[TICTACTOE_SIGNAL]);
g_signal_emit (G_OBJECT (ttt),
tictactoe_signals[TICTACTOE_SIGNAL], 0);
break;
}
}
@ -11567,8 +11563,8 @@ main (int argc, char *argv[])
gtk_window_set_title (GTK_WINDOW (window), "Aspect Frame");
gtk_signal_connect (GTK_OBJECT (window), "destroy",
GTK_SIGNAL_FUNC (gtk_exit), NULL);
g_signal_connect (G_OBJECT (window), "destroy",
G_CALLBACK (exit), NULL);
gtk_container_set_border_width (GTK_CONTAINER (window), 10);
@ -11578,8 +11574,8 @@ main (int argc, char *argv[])
gtk_widget_show (ttt);
/* And attach to its "tictactoe" signal */
gtk_signal_connect (GTK_OBJECT (ttt), "tictactoe",
GTK_SIGNAL_FUNC (win), NULL);
g_signal_connect (G_OBJECT (ttt), "tictactoe",
G_CALLBACK (win), NULL);
gtk_widget_show (window);
@ -14557,7 +14553,6 @@ which are not included in complete form elsewhere.</para>
<programlisting role="C">
<!-- example-start tictactoe tictactoe.h -->
/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
@ -14580,17 +14575,18 @@ which are not included in complete form elsewhere.</para>
#define __TICTACTOE_H__
#include &lt;gdk/gdk.h&gt;
#include &lt;gtk/gtkvbox.h&gt;
#include &lt;glib.h&gt;
#include &lt;glib-object.h&gt;
#include &lt;gtk/gtktable.h&gt;
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
G_BEGIN_DECLS
#define TICTACTOE(obj) GTK_CHECK_CAST (obj, tictactoe_get_type (), Tictactoe)
#define TICTACTOE_CLASS(klass) GTK_CHECK_CLASS_CAST (klass, tictactoe_get_type (), TictactoeClass)
#define IS_TICTACTOE(obj) GTK_CHECK_TYPE (obj, tictactoe_get_type ())
#define TICTACTOE_TYPE (tictactoe_get_type ())
#define TICTACTOE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), TICTACTOE_TYPE, Tictactoe))
#define TICTACTOE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), TICTACTOE_TYPE, TictactoeClass))
#define IS_TICTACTOE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), TICTACTOE_TYPE))
#define IS_TICTACTOE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), TICTACTOE_TYPE))
typedef struct _Tictactoe Tictactoe;
@ -14598,25 +14594,23 @@ typedef struct _TictactoeClass TictactoeClass;
struct _Tictactoe
{
GtkVBox vbox;
GtkTable table;
GtkWidget *buttons[3][3];
};
struct _TictactoeClass
{
GtkVBoxClass parent_class;
GtkTableClass parent_class;
void (* tictactoe) (Tictactoe *ttt);
};
GtkType tictactoe_get_type (void);
GType tictactoe_get_type (void);
GtkWidget* tictactoe_new (void);
void tictactoe_clear (Tictactoe *ttt);
#ifdef __cplusplus
}
#endif /* __cplusplus */
G_END_DECLS
#endif /* __TICTACTOE_H__ */
@ -14650,9 +14644,9 @@ void tictactoe_clear (Tictactoe *ttt);
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "gtk/gtksignal.h"
#include "gtk/gtktable.h"
#include "gtk/gtktogglebutton.h"
#include &lt;gtk/gtksignal.h&gt;
#include &lt;gtk/gtktable.h&gt;
#include &lt;gtk/gtktogglebutton.h&gt;
#include "tictactoe.h"
enum {
@ -14667,7 +14661,7 @@ static void tictactoe_toggle (GtkWidget *widget, Tictactoe *ttt);
static gint tictactoe_signals[LAST_SIGNAL] = { 0 };
GType
tictactoe_get_type ()
tictactoe_get_type (void)
{
static GType ttt_type = 0;
@ -14676,57 +14670,50 @@ tictactoe_get_type ()
static const GTypeInfo ttt_info =
{
sizeof (TictactoeClass),
NULL,
NULL,
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) tictactoe_class_init,
NULL,
NULL,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (Tictactoe),
0,
(GInstanceInitFunc) tictactoe_init,
};
ttt_type = g_type_register_static (GTK_TYPE_VBOX, "Tictactoe", &amp;ttt_info, 0);
ttt_type = g_type_register_static (GTK_TYPE_TABLE, "Tictactoe", &amp;ttt_info, 0);
}
return ttt_type;
}
static void
tictactoe_class_init (TictactoeClass *class)
tictactoe_class_init (TictactoeClass *klass)
{
GtkObjectClass *object_class;
object_class = (GtkObjectClass*) class;
tictactoe_signals[TICTACTOE_SIGNAL] = g_signal_new ("tictactoe",
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_FIRST,
0,
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (TictactoeClass, tictactoe),
NULL,
NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0, NULL);
G_TYPE_NONE, 0);
class-&gt;tictactoe = NULL;
}
static void
tictactoe_init (Tictactoe *ttt)
{
GtkWidget *table;
gint i,j;
table = gtk_table_new (3, 3, TRUE);
gtk_container_add (GTK_CONTAINER (ttt), table);
gtk_widget_show (table);
gtk_table_resize (GTK_TABLE (ttt), 3, 3);
gtk_table_set_homogeneous (GTK_TABLE (ttt), TRUE);
for (i = 0; i &lt; 3; i++)
for (j = 0; j &lt; 3; j++)
{
for (i=0;i&lt;3; i++)
for (j=0;j&lt;3; j++) {
ttt-&gt;buttons[i][j] = gtk_toggle_button_new ();
gtk_table_attach_defaults (GTK_TABLE (table), ttt-&gt;buttons[i][j],
gtk_table_attach_defaults (GTK_TABLE (ttt), ttt-&gt;buttons[i][j],
i, i+1, j, j+1);
g_signal_connect (G_OBJECT (ttt-&gt;buttons[i][j]), "toggled",
G_CALLBACK (tictactoe_toggle), (gpointer) ttt);
@ -14746,15 +14733,17 @@ tictactoe_clear (Tictactoe *ttt)
{
int i,j;
for (i = 0; i &lt; 3; i++)
for (j = 0; j &lt; 3; j++)
for (i = 0; i&lt;3; i++)
for (j = 0; j&lt;3; j++)
{
g_signal_handlers_block_by_func (G_OBJECT (ttt-&gt;buttons[i][j]),
NULL, ttt);
g_signal_handlers_block_matched (G_OBJECT (ttt-&gt;buttons[i][j]),
G_SIGNAL_MATCH_DATA,
0, 0, NULL, NULL, ttt);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (ttt-&gt;buttons[i][j]),
FALSE);
g_signal_handlers_unblock_by_func (G_OBJECT (ttt-&gt;buttons[i][j]),
NULL, ttt);
g_signal_handlers_unblock_matched (G_OBJECT (ttt->buttons[i][j]),
G_SIGNAL_MATCH_DATA,
0, 0, NULL, NULL, ttt);
}
}
@ -14772,12 +14761,12 @@ tictactoe_toggle (GtkWidget *widget, Tictactoe *ttt)
int success, found;
for (k = 0; k &lt; 8; k++)
for (k = 0; k&lt;8; k++)
{
success = TRUE;
found = FALSE;
for (i = 0; i &lt; 3; i++)
for (i = 0; i&lt;3; i++)
{
success = success &amp;&amp;
GTK_TOGGLE_BUTTON (ttt-&gt;buttons[rwins[k][i]][cwins[k][i]])-&gt;active;
@ -14839,6 +14828,7 @@ int main( int argc,
gtk_container_add (GTK_CONTAINER (window), ttt);
gtk_widget_show (ttt);
/* And attach to its "tictactoe" signal */
g_signal_connect (G_OBJECT (ttt), "tictactoe",
G_CALLBACK (win), NULL);

2
examples/buttonbox/buttonbox.c
View File

@ -43,7 +43,7 @@ GtkWidget *create_bbox( gint horizontal,
int main( int argc,
char *argv[] )
{
GtkWidget *window;
static GtkWidget* window = NULL;
GtkWidget *main_vbox;
GtkWidget *vbox;
GtkWidget *hbox;

24
examples/gtkdial/gtkdial.c
View File

@ -146,7 +146,7 @@ gtk_dial_destroy (GtkObject *object)
dial = GTK_DIAL (object);
if (dial->adjustment)
if (dial->adjustment)
{
g_object_unref (GTK_OBJECT (dial->adjustment));
dial->adjustment = NULL;
@ -353,7 +353,7 @@ gtk_dial_expose (GtkWidget *widget,
if ((upper - lower) == 0)
return FALSE;
increment = (100*G_PI) / (dial->radius*dial->radius);
increment = (100*M_PI) / (dial->radius*dial->radius);
inc = (upper - lower);
@ -363,7 +363,7 @@ gtk_dial_expose (GtkWidget *widget,
for (i = 0; i <= inc; i++)
{
theta = ((gfloat)i*G_PI / (18*inc/24.) - G_PI/6.);
theta = ((gfloat)i*M_PI / (18*inc/24.) - M_PI/6.);
if ((theta - last) < (increment))
continue;
@ -558,17 +558,17 @@ gtk_dial_update_mouse (GtkDial *dial, gint x, gint y)
old_value = dial->adjustment->value;
dial->angle = atan2(yc-y, x-xc);
if (dial->angle < -G_PI/2.)
dial->angle += 2*G_PI;
if (dial->angle < -M_PI/2.)
dial->angle += 2*M_PI;
if (dial->angle < -G_PI/6)
dial->angle = -G_PI/6;
if (dial->angle < -M_PI/6)
dial->angle = -M_PI/6;
if (dial->angle > 7.*G_PI/6.)
dial->angle = 7.*G_PI/6.;
if (dial->angle > 7.*M_PI/6.)
dial->angle = 7.*M_PI/6.;
dial->adjustment->value = dial->adjustment->lower + (7.*G_PI/6 - dial->angle) *
(dial->adjustment->upper - dial->adjustment->lower) / (4.*G_PI/3.);
dial->adjustment->value = dial->adjustment->lower + (7.*M_PI/6 - dial->angle) *
(dial->adjustment->upper - dial->adjustment->lower) / (4.*M_PI/3.);
if (dial->adjustment->value != old_value)
{
@ -615,7 +615,7 @@ gtk_dial_update (GtkDial *dial)
g_signal_emit_by_name (GTK_OBJECT (dial->adjustment), "value_changed");
}
dial->angle = 7.*G_PI/6. - (new_value - dial->adjustment->lower) * 4.*G_PI/3. /
dial->angle = 7.*M_PI/6. - (new_value - dial->adjustment->lower) * 4.*M_PI/3. /
(dial->adjustment->upper - dial->adjustment->lower);
gtk_widget_queue_draw (GTK_WIDGET (dial));