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Getting-started: port drawing.c to GtkApplication

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This commit is contained in:
Bastian Ilsø 2015-02-19 15:53:35 +01:00
parent c73ab94d3f
commit ec07987a90
1 changed files with 30 additions and 21 deletions
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51
examples/drawing.c
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@ -129,17 +129,15 @@ close_window (void)
gtk_main_quit ();
}
int
main (int argc,
char *argv[])
static void
activate (GtkApplication *app,
gpointer user_data)
{
GtkWidget *window;
GtkWidget *frame;
GtkWidget *da;
GtkWidget *drawing_area;
gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
window = gtk_application_window_new (app);
gtk_window_set_title (GTK_WINDOW (window), "Drawing Area");
g_signal_connect (window, "destroy", G_CALLBACK (close_window), NULL);
@ -150,35 +148,46 @@ main (int argc,
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_container_add (GTK_CONTAINER (window), frame);
da = gtk_drawing_area_new ();
drawing_area = gtk_drawing_area_new ();
/* set a minimum size */
gtk_widget_set_size_request (da, 100, 100);
gtk_widget_set_size_request (drawing_area, 100, 100);
gtk_container_add (GTK_CONTAINER (frame), da);
gtk_container_add (GTK_CONTAINER (frame), drawing_area);
/* Signals used to handle the backing surface */
g_signal_connect (da, "draw",
g_signal_connect (drawing_area, "draw",
G_CALLBACK (draw_cb), NULL);
g_signal_connect (da,"configure-event",
g_signal_connect (drawing_area,"configure-event",
G_CALLBACK (configure_event_cb), NULL);
/* Event signals */
g_signal_connect (da, "motion-notify-event",
g_signal_connect (drawing_area, "motion-notify-event",
G_CALLBACK (motion_notify_event_cb), NULL);
g_signal_connect (da, "button-press-event",
g_signal_connect (drawing_area, "button-press-event",
G_CALLBACK (button_press_event_cb), NULL);
/* Ask to receive events the drawing area doesn't normally
* subscribe to. In particular, we need to ask for the
* button press and motion notify events that want to handle.
*/
gtk_widget_set_events (da, gtk_widget_get_events (da)
| GDK_BUTTON_PRESS_MASK
| GDK_POINTER_MOTION_MASK);
gtk_widget_set_events (drawing_area, gtk_widget_get_events (drawing_area)
| GDK_BUTTON_PRESS_MASK
| GDK_POINTER_MOTION_MASK);
gtk_widget_show_all (window);
gtk_main ();
return 0;
}
int
main (int argc,
char **argv)
{
GtkApplication *app;
int status;
app = gtk_application_new ("org.gtk.example", G_APPLICATION_FLAGS_NONE);
g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
status = g_application_run (G_APPLICATION (app), argc, argv);
g_object_unref (app);
return status;
}