*
* 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 <config.h>
#include <gtk/gtk.h>
#include <string.h>
void
copy_button_clicked (GtkWidget *button,
- gpointer user_data)
+ 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);
+ 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)
+ const gchar *text,
+ gpointer user_data)
{
GtkWidget *entry;
entry = GTK_WIDGET (user_data);
-
+
/* Set the entry text */
- gtk_entry_set_text (GTK_ENTRY (entry), text);
+ if(text)
+ gtk_entry_set_text (GTK_ENTRY (entry), text);
}
void
paste_button_clicked (GtkWidget *button,
- gpointer user_data)
+ 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);
+ 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);
+ 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 *
GtkWidget *vbox, *hbox;
GtkWidget *label;
GtkWidget *entry, *button;
-
+ GtkWidget *ebox, *image;
+ GtkClipboard *clipboard;
+
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
- vbox = gtk_vbox_new (FALSE, 0);
+ gtk_window_set_screen (GTK_WINDOW (window),
+ gtk_widget_get_screen (do_widget));
+ gtk_window_set_title (GTK_WINDOW (window), "Clipboard demo");
+
+ g_signal_connect (window, "destroy",
+ G_CALLBACK (gtk_widget_destroyed), &window);
+
+ vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 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);
+ hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 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);
+ 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);
+ hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 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);
-
+ 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_box_new (GTK_ORIENTATION_HORIZONTAL, 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))
+ if (!gtk_widget_get_visible (window))
gtk_widget_show_all (window);
else
{
projects / ~andy / gtk / blobdiff