forked from AuroraMiddleware/gtk
72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/* Text View/Undo and Redo
|
|
*
|
|
* The GtkTextView supports undo and redo through the use of a
|
|
* GtkTextBuffer. You can enable or disable undo support using
|
|
* gtk_text_buffer_set_enable_undo().
|
|
*
|
|
* Use Primary+Z to undo and Primary+Shift+Z or Primary+Y to
|
|
* redo previously undone operations.
|
|
*/
|
|
|
|
#include <gtk/gtk.h>
|
|
#include <stdlib.h> /* for exit() */
|
|
|
|
GtkWidget *
|
|
do_textundo (GtkWidget *do_widget)
|
|
{
|
|
static GtkWidget *window = NULL;
|
|
|
|
if (!window)
|
|
{
|
|
GtkWidget *view;
|
|
GtkWidget *sw;
|
|
GtkTextBuffer *buffer;
|
|
GtkTextIter iter;
|
|
|
|
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
|
|
gtk_window_set_display (GTK_WINDOW (window),
|
|
gtk_widget_get_display (do_widget));
|
|
gtk_window_set_default_size (GTK_WINDOW (window),
|
|
450, 450);
|
|
|
|
g_signal_connect (window, "destroy",
|
|
G_CALLBACK (gtk_widget_destroyed), &window);
|
|
|
|
gtk_window_set_title (GTK_WINDOW (window), "TextView Undo");
|
|
|
|
view = gtk_text_view_new ();
|
|
gtk_text_view_set_wrap_mode (GTK_TEXT_VIEW (view), GTK_WRAP_WORD);
|
|
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
|
|
gtk_text_buffer_set_enable_undo (buffer, TRUE);
|
|
|
|
/* this text cannot be undone */
|
|
gtk_text_buffer_begin_irreversible_action (buffer);
|
|
gtk_text_buffer_get_start_iter (buffer, &iter);
|
|
gtk_text_buffer_insert (buffer, &iter,
|
|
"Type to add more text.\n"
|
|
"Use Primary+Z to undo and Primary+Shift+Z to redo a previously undone action.\n"
|
|
"\n",
|
|
-1);
|
|
gtk_text_buffer_end_irreversible_action (buffer);
|
|
|
|
sw = gtk_scrolled_window_new (NULL, NULL);
|
|
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
|
|
GTK_POLICY_AUTOMATIC,
|
|
GTK_POLICY_AUTOMATIC);
|
|
gtk_container_add (GTK_CONTAINER (window), sw);
|
|
gtk_container_add (GTK_CONTAINER (sw), view);
|
|
}
|
|
|
|
if (!gtk_widget_get_visible (window))
|
|
{
|
|
gtk_widget_show (window);
|
|
}
|
|
else
|
|
{
|
|
gtk_widget_destroy (window);
|
|
window = NULL;
|
|
}
|
|
|
|
return window;
|
|
}
|