indexing
	description: "."
	copyright: "[
					Copyright (C) 2006 Paolo Redaelli, GTK+ team
					
					This library is free software; you can redistribute it and/or
					modify it under the terms of the GNU Lesser General Public License
					as published by the Free Software Foundation; either version 2.1 of
					the License, or (at your option) any later version.
					
					This library is distributed in the hope that it will be useful, but
					WITHOUT ANY WARRANTY; without even the implied warranty of
					MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
					Lesser General Public License for more details.

					You should have received a copy of the GNU Lesser General Public
					License along with this library; if not, write to the Free Software
					Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
					02110-1301 USA
			]"

class CLIPBOARD

creation make

feature
-- /* 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;
-- }
end