1/* Entry/Undo and Redo
2 *
3 * GtkEntry can provide basic Undo/Redo support using standard keyboard
4 * accelerators such as Control+z to undo and Control+Shift+z to redo.
5 * Additionally, Control+y can be used to redo.
6 *
7 * Use gtk_entry_set_enable_undo() to enable undo/redo support.
8 */
9
10#include <glib/gi18n.h>
11#include <gtk/gtk.h>
12
13GtkWidget *
14do_entry_undo (GtkWidget *do_widget)
15{
16 static GtkWidget *window = NULL;
17 GtkWidget *vbox;
18 GtkWidget *label;
19 GtkWidget *entry;
20
21 if (!window)
22 {
23 window = gtk_window_new ();
24 gtk_window_set_display (GTK_WINDOW (window),
25 display: gtk_widget_get_display (widget: do_widget));
26 gtk_window_set_title (GTK_WINDOW (window), title: "Undo and Redo");
27 gtk_window_set_resizable (GTK_WINDOW (window), FALSE);
28 g_object_add_weak_pointer (G_OBJECT (window), weak_pointer_location: (gpointer *)&window);
29
30 vbox = gtk_box_new (orientation: GTK_ORIENTATION_VERTICAL, spacing: 12);
31 gtk_widget_set_margin_start (widget: vbox, margin: 18);
32 gtk_widget_set_margin_end (widget: vbox, margin: 18);
33 gtk_widget_set_margin_top (widget: vbox, margin: 18);
34 gtk_widget_set_margin_bottom (widget: vbox, margin: 18);
35 gtk_window_set_child (GTK_WINDOW (window), child: vbox);
36
37 label = gtk_label_new (NULL);
38 gtk_label_set_markup (GTK_LABEL (label),
39 str: "Use Control+z or Control+Shift+z to undo or redo changes");
40 gtk_box_append (GTK_BOX (vbox), child: label);
41
42 /* Create our entry */
43 entry = gtk_entry_new ();
44 gtk_editable_set_enable_undo (GTK_EDITABLE (entry), TRUE);
45 gtk_box_append (GTK_BOX (vbox), child: entry);
46 }
47
48 if (!gtk_widget_get_visible (widget: window))
49 gtk_widget_show (widget: window);
50 else
51 gtk_window_destroy (GTK_WINDOW (window));
52
53 return window;
54}
55

source code of gtk/demos/gtk-demo/entry_undo.c