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GtkApplication: Add window-added/-removed signals

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This is useful to let unrelated parts of an application (or
plugins) learn about the windows of an application. Based
on a patch by Matt Barnes,
https://bugzilla.gnome.org/show_bug.cgi?id=641087
This commit is contained in:
Matthias Clasen 2011-05-31 19:12:13 -04:00
parent 75390b2d60
commit 8143ce69eb
2 changed files with 88 additions and 29 deletions
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110
gtk/gtkapplication.c
View File

@ -60,6 +60,14 @@
* </example>
*/
enum {
WINDOW_ADDED,
WINDOW_REMOVED,
LAST_SIGNAL
};
static guint gtk_application_signals[LAST_SIGNAL];
G_DEFINE_TYPE (GtkApplication, gtk_application, G_TYPE_APPLICATION)
struct _GtkApplicationPrivate
@ -157,6 +165,36 @@ gtk_application_init (GtkApplication *application)
GtkApplicationPrivate);
}
static void
gtk_application_window_added (GtkApplication *application,
GtkWindow *window)
{
GtkApplicationPrivate *priv = application->priv;
priv->windows = g_list_prepend (priv->windows, window);
gtk_window_set_application (window, application);
g_application_hold (G_APPLICATION (application));
g_signal_connect (window, "focus-in-event",
G_CALLBACK (gtk_application_focus_in_event_cb),
application);
}
static void
gtk_application_window_removed (GtkApplication *application,
GtkWindow *window)
{
GtkApplicationPrivate *priv = application->priv;
g_signal_handlers_disconnect_by_func (window,
gtk_application_focus_in_event_cb,
application);
g_application_release (G_APPLICATION (application));
gtk_window_set_application (window, NULL);
priv->windows = g_list_remove (priv->windows, window);
}
static void
gtk_application_class_init (GtkApplicationClass *class)
{
@ -170,7 +208,45 @@ gtk_application_class_init (GtkApplicationClass *class)
application_class->quit_mainloop = gtk_application_quit_mainloop;
application_class->run_mainloop = gtk_application_run_mainloop;
class->window_added = gtk_application_window_added;
class->window_removed = gtk_application_window_removed;
g_type_class_add_private (class, sizeof (GtkApplicationPrivate));
/**
* GtkApplication::window-added:
* @application: the #GtkApplication which emitted the signal
* @window: the newly-added #GtkWindow
*
* Emitted when a #GtkWindow is added to @application through
* gtk_application_add_wi!ndow().
*
* Since: 3.2
*/
gtk_application_signals[WINDOW_ADDED] =
g_signal_new ("window-added", GTK_TYPE_APPLICATION, G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkApplicationClass, window_added),
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1, GTK_TYPE_WINDOW);
/**
* GtkApplication::window-removed:
* @application: the #GtkApplication which emitted the signal
* @window: the #GtkWindow that is being removed
*
* Emitted when a #GtkWindow is removed from @application,
* either as a side-effect of being destroyed or explicitly
* through gtk_application_remove_window().
*
* Since: 3.2
*/
gtk_application_signals[WINDOW_REMOVED] =
g_signal_new ("window-removed", GTK_TYPE_APPLICATION, G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkApplicationClass, window_removed),
NULL, NULL,
g_cclosure_marshal_VOID__OBJECT,
G_TYPE_NONE, 1, GTK_TYPE_WINDOW);
}
/**
@ -224,22 +300,11 @@ void
gtk_application_add_window (GtkApplication *application,
GtkWindow *window)
{
GtkApplicationPrivate *priv;
g_return_if_fail (GTK_IS_APPLICATION (application));
priv = application->priv;
if (!g_list_find (priv->windows, window))
{
priv->windows = g_list_prepend (priv->windows, window);
gtk_window_set_application (window, application);
g_application_hold (G_APPLICATION (application));
g_signal_connect (window, "focus-in-event",
G_CALLBACK (gtk_application_focus_in_event_cb),
application);
}
if (!g_list_find (application->priv->windows, window))
g_signal_emit (application,
gtk_application_signals[WINDOW_ADDED], 0, window);
}
/**
@ -262,22 +327,11 @@ void
gtk_application_remove_window (GtkApplication *application,
GtkWindow *window)
{
GtkApplicationPrivate *priv;
GList *link;
g_return_if_fail (GTK_IS_APPLICATION (application));
priv = application->priv;
link = g_list_find (priv->windows, window);
if (link)
{
g_signal_handlers_disconnect_by_func (window,
gtk_application_focus_in_event_cb,
application);
priv->windows = g_list_remove_link (priv->windows, link);
g_application_release (G_APPLICATION (application));
gtk_window_set_application (window, NULL);
}
if (g_list_find (application->priv->windows, window))
g_signal_emit (application,
gtk_application_signals[WINDOW_REMOVED], 0, window);
}
/**

7
gtk/gtkapplication.h
View File

@ -55,8 +55,13 @@ struct _GtkApplicationClass
{
GApplicationClass parent_class;
void (*window_added) (GtkApplication *application,
GtkWindow *window);
void (*window_removed) (GtkApplication *application,
GtkWindow *window);
/*< private >*/
gpointer padding[16];
gpointer padding[14];
};
GType gtk_application_get_type (void) G_GNUC_CONST;