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- /* Clipboard
- *
- * GtkClipboard is used for clipboard handling. This demo shows how to
- * copy and paste text to and from the clipboard.
- *
- * It also shows how to transfer images via the clipboard or via
- * drag-and-drop, and how to make clipboard contents persist after
- * the application exits. Clipboard persistence requires a clipboard
- * manager to run.
- */
-
- #include <gtk/gtk.h>
- #include <string.h>
-
- static GtkWidget *window = NULL;
-
- void
- copy_button_clicked (GtkWidget *button,
- gpointer user_data)
- {
- GtkWidget *entry;
- GtkClipboard *clipboard;
-
- entry = GTK_WIDGET (user_data);
-
- /* Get the clipboard object */
- clipboard = gtk_widget_get_clipboard (entry,
- GDK_SELECTION_CLIPBOARD);
-
- /* Set clipboard text */
- gtk_clipboard_set_text (clipboard, gtk_entry_get_text (GTK_ENTRY (entry)), -1);
- }
-
- void
- paste_received (GtkClipboard *clipboard,
- const gchar *text,
- gpointer user_data)
- {
- GtkWidget *entry;
-
- entry = GTK_WIDGET (user_data);
-
- /* Set the entry text */
- if(text)
- gtk_entry_set_text (GTK_ENTRY (entry), text);
- }
-
- void
- paste_button_clicked (GtkWidget *button,
- gpointer user_data)
- {
- GtkWidget *entry;
- GtkClipboard *clipboard;
-
- entry = GTK_WIDGET (user_data);
-
- /* Get the clipboard object */
- clipboard = gtk_widget_get_clipboard (entry,
- GDK_SELECTION_CLIPBOARD);
-
- /* Request the contents of the clipboard, contents_received will be
- called when we do get the contents.
- */
- gtk_clipboard_request_text (clipboard,
- paste_received, entry);
- }
-
- static GdkPixbuf *
- get_image_pixbuf (GtkImage *image)
- {
- gchar *stock_id;
- GtkIconSize size;
-
- switch (gtk_image_get_storage_type (image))
- {
- case GTK_IMAGE_PIXBUF:
- return g_object_ref (gtk_image_get_pixbuf (image));
- case GTK_IMAGE_STOCK:
- gtk_image_get_stock (image, &stock_id, &size);
- return gtk_widget_render_icon (GTK_WIDGET (image),
- stock_id, size, NULL);
- default:
- g_warning ("Image storage type %d not handled",
- gtk_image_get_storage_type (image));
- return NULL;
- }
- }
-
- static void
- drag_begin (GtkWidget *widget,
- GdkDragContext *context,
- gpointer data)
- {
- GdkPixbuf *pixbuf;
-
- pixbuf = get_image_pixbuf (GTK_IMAGE (data));
- gtk_drag_set_icon_pixbuf (context, pixbuf, -2, -2);
- g_object_unref (pixbuf);
- }
-
- void
- drag_data_get (GtkWidget *widget,
- GdkDragContext *context,
- GtkSelectionData *selection_data,
- guint info,
- guint time,
- gpointer data)
- {
- GdkPixbuf *pixbuf;
-
- pixbuf = get_image_pixbuf (GTK_IMAGE (data));
- gtk_selection_data_set_pixbuf (selection_data, pixbuf);
- g_object_unref (pixbuf);
- }
-
- static void
- drag_data_received (GtkWidget *widget,
- GdkDragContext *context,
- gint x,
- gint y,
- GtkSelectionData *selection_data,
- guint info,
- guint32 time,
- gpointer data)
- {
- GdkPixbuf *pixbuf;
-
- if (selection_data->length > 0)
- {
- pixbuf = gtk_selection_data_get_pixbuf (selection_data);
- gtk_image_set_from_pixbuf (GTK_IMAGE (data), pixbuf);
- g_object_unref (pixbuf);
- }
- }
-
- static void
- copy_image (GtkMenuItem *item,
- gpointer data)
- {
- GtkClipboard *clipboard;
- GdkPixbuf *pixbuf;
-
- clipboard = gtk_clipboard_get (GDK_SELECTION_CLIPBOARD);
- pixbuf = get_image_pixbuf (GTK_IMAGE (data));
-
- gtk_clipboard_set_image (clipboard, pixbuf);
- g_object_unref (pixbuf);
- }
-
- static void
- paste_image (GtkMenuItem *item,
- gpointer data)
- {
- GtkClipboard *clipboard;
- GdkPixbuf *pixbuf;
-
- clipboard = gtk_clipboard_get (GDK_SELECTION_CLIPBOARD);
- pixbuf = gtk_clipboard_wait_for_image (clipboard);
-
- if (pixbuf)
- {
- gtk_image_set_from_pixbuf (GTK_IMAGE (data), pixbuf);
- g_object_unref (pixbuf);
- }
- }
-
- static gboolean
- button_press (GtkWidget *widget,
- GdkEventButton *button,
- gpointer data)
- {
- GtkWidget *menu;
- GtkWidget *item;
-
- if (button->button != 3)
- return FALSE;
-
- menu = gtk_menu_new ();
-
- item = gtk_image_menu_item_new_from_stock (GTK_STOCK_COPY, NULL);
- g_signal_connect (item, "activate", G_CALLBACK (copy_image), data);
- gtk_widget_show (item);
- gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
-
- item = gtk_image_menu_item_new_from_stock (GTK_STOCK_PASTE, NULL);
- g_signal_connect (item, "activate", G_CALLBACK (paste_image), data);
- gtk_widget_show (item);
- gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
-
- gtk_menu_popup (GTK_MENU (menu), NULL, NULL, NULL, NULL, 3, button->time);
- return TRUE;
- }
-
- GtkWidget *
- do_clipboard (GtkWidget *do_widget)
- {
- if (!window)
- {
- GtkWidget *vbox, *hbox;
- GtkWidget *label;
- GtkWidget *entry, *button;
- GtkWidget *ebox, *image;
- GtkClipboard *clipboard;
-
- window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
- g_signal_connect (window, "destroy",
- G_CALLBACK (gtk_widget_destroyed), &window);
-
- vbox = gtk_vbox_new (FALSE, 0);
- gtk_container_set_border_width (GTK_CONTAINER (vbox), 8);
-
- gtk_container_add (GTK_CONTAINER (window), vbox);
-
- label = gtk_label_new ("\"Copy\" will copy the text\nin the entry to the clipboard");
-
- gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
-
- hbox = gtk_hbox_new (FALSE, 4);
- gtk_container_set_border_width (GTK_CONTAINER (hbox), 8);
- gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
-
- /* Create the first entry */
- entry = gtk_entry_new ();
- gtk_box_pack_start (GTK_BOX (hbox), entry, TRUE, TRUE, 0);
-
- /* Create the button */
- button = gtk_button_new_from_stock (GTK_STOCK_COPY);
- gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
- g_signal_connect (button, "clicked",
- G_CALLBACK (copy_button_clicked), entry);
-
- label = gtk_label_new ("\"Paste\" will paste the text from the clipboard to the entry");
- gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
-
- hbox = gtk_hbox_new (FALSE, 4);
- gtk_container_set_border_width (GTK_CONTAINER (hbox), 8);
- gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
-
- /* Create the second entry */
- entry = gtk_entry_new ();
- gtk_box_pack_start (GTK_BOX (hbox), entry, TRUE, TRUE, 0);
-
- /* Create the button */
- button = gtk_button_new_from_stock (GTK_STOCK_PASTE);
- gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
- g_signal_connect (button, "clicked",
- G_CALLBACK (paste_button_clicked), entry);
-
- label = gtk_label_new ("Images can be transferred via the clipboard, too");
- gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
-
- hbox = gtk_hbox_new (FALSE, 4);
- gtk_container_set_border_width (GTK_CONTAINER (hbox), 8);
- gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
-
- /* Create the first image */
- image = gtk_image_new_from_stock (GTK_STOCK_DIALOG_WARNING,
- GTK_ICON_SIZE_BUTTON);
- ebox = gtk_event_box_new ();
- gtk_container_add (GTK_CONTAINER (ebox), image);
- gtk_container_add (GTK_CONTAINER (hbox), ebox);
-
- /* make ebox a drag source */
- gtk_drag_source_set (ebox, GDK_BUTTON1_MASK, NULL, 0, GDK_ACTION_COPY);
- gtk_drag_source_add_image_targets (ebox);
- g_signal_connect (ebox, "drag_begin",
- G_CALLBACK (drag_begin), image);
- g_signal_connect (ebox, "drag_data_get",
- G_CALLBACK (drag_data_get), image);
-
- /* accept drops on ebox */
- gtk_drag_dest_set (ebox, GTK_DEST_DEFAULT_ALL,
- NULL, 0, GDK_ACTION_COPY);
- gtk_drag_dest_add_image_targets (ebox);
- g_signal_connect (ebox, "drag_data_received",
- G_CALLBACK (drag_data_received), image);
-
- /* context menu on ebox */
- g_signal_connect (ebox, "button_press_event",
- G_CALLBACK (button_press), image);
-
- /* Create the second image */
- image = gtk_image_new_from_stock (GTK_STOCK_STOP,
- GTK_ICON_SIZE_BUTTON);
- ebox = gtk_event_box_new ();
- gtk_container_add (GTK_CONTAINER (ebox), image);
- gtk_container_add (GTK_CONTAINER (hbox), ebox);
-
- /* make ebox a drag source */
- gtk_drag_source_set (ebox, GDK_BUTTON1_MASK, NULL, 0, GDK_ACTION_COPY);
- gtk_drag_source_add_image_targets (ebox);
- g_signal_connect (ebox, "drag_begin",
- G_CALLBACK (drag_begin), image);
- g_signal_connect (ebox, "drag_data_get",
- G_CALLBACK (drag_data_get), image);
-
- /* accept drops on ebox */
- gtk_drag_dest_set (ebox, GTK_DEST_DEFAULT_ALL,
- NULL, 0, GDK_ACTION_COPY);
- gtk_drag_dest_add_image_targets (ebox);
- g_signal_connect (ebox, "drag_data_received",
- G_CALLBACK (drag_data_received), image);
-
- /* context menu on ebox */
- g_signal_connect (ebox, "button_press_event",
- G_CALLBACK (button_press), image);
-
- /* tell the clipboard manager to make the data persistent */
- clipboard = gtk_clipboard_get (GDK_SELECTION_CLIPBOARD);
- gtk_clipboard_set_can_store (clipboard, NULL, 0);
- }
-
- if (!GTK_WIDGET_VISIBLE (window))
- gtk_widget_show_all (window);
- else
- {
- gtk_widget_destroy (window);
- window = NULL;
- }
-
- return window;
- }
-