<title>Packing</title>
<para>When creating an application, you'll want to put more than one widget
- inside a window. Our first helloworld example only used one widget so we
- could simply use a gtk_container_add() call to "pack" the widget into the
- window. But when you want to put more than one widget into a window, it
+ inside a window.
+ When you want to put more than one widget into a window, it
it becomes important to control how each widget is positioned and sized.
This is where packing comes in.</para>
g_print ("Hello World\n");
}
-int
-main (int argc,
- char *argv[])
+static void
+activate (GtkApplication *app,
+ gpointer user_data)
{
GtkWidget *window;
GtkWidget *grid;
GtkWidget *button;
- /* This is called in all GTK applications. Arguments are parsed
- * from the command line and are returned to the application.
- */
- gtk_init (&argc, &argv);
-
/* create a new window, and set its title */
- window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
- gtk_window_set_title (GTK_WINDOW (window), "Grid");
- g_signal_connect (window, "destroy", G_CALLBACK (gtk_main_quit), NULL);
+ window = gtk_application_window_new (app);
+ gtk_window_set_title (GTK_WINDOW (window), "Window");
gtk_container_set_border_width (GTK_CONTAINER (window), 10);
/* Here we construct the container that is going pack our buttons */
gtk_grid_attach (GTK_GRID (grid), button, 1, 0, 1, 1);
button = gtk_button_new_with_label ("Quit");
- g_signal_connect (button, "clicked", G_CALLBACK (gtk_main_quit), NULL);
+ g_signal_connect_swapped (button, "clicked", G_CALLBACK (gtk_widget_destroy), window);
/* Place the Quit button in the grid cell (0, 1), and make it
* span 2 columns.
*/
gtk_widget_show_all (window);
- /* All GTK applications must have a gtk_main(). Control ends here
- * and waits for an event to occur (like a key press or a mouse event),
- * until gtk_main_quit() is called.
- */
- gtk_main ();
+}
+
+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 0;
+ return status;
}