send a GtkWidget** instead of a GtkNotebookPage* when doing tabs DnD, this

2006-03-22  Carlos Garnacho  <carlosg@gnome.org>

        * gtk/gtknotebook.c: send a GtkWidget** instead of a GtkNotebookPage*
        when doing tabs DnD, this allows DnD interaction with other widgets,
        added some docs for this too.
        * tests/testnotebookdnd.c: add some code to test it.

1 files changed, 70 insertions, 2 deletions

diff --git a/tests/testnotebookdnd.c b/tests/testnotebookdnd.c
index 4c48af5649..f47d93a6f2 100644
--- a/tests/testnotebookdnd.c
+++ b/tests/testnotebookdnd.c
@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-file-style: "gnu"; tab-width: 8 -*- */
 /* 
  * GTK - The GIMP Toolkit
  * Copyright (C) 2006  Carlos Garnacho Parro <carlosg@gnome.org>
@@ -64,6 +65,10 @@ gchar *tabs4 [] = {
   NULL
 };
 
+static const GtkTargetEntry button_targets[] = {
+  { "GTK_NOTEBOOK_TAB", GTK_TARGET_SAME_APP, 0 },
+};
+
 static GtkNotebook*
 window_creation_function (GtkNotebook *source_notebook,
 			  GtkWidget   *child,
@@ -94,6 +99,46 @@ on_page_reordered (GtkNotebook *notebook, GtkWidget *child, guint page_num, gpoi
   g_print ("page %d reordered\n", page_num);
 }
 
+static void
+on_notebook_drag_begin (GtkWidget      *widget,
+			GdkDragContext *context,
+			gpointer        data)
+{
+  GdkPixbuf *pixbuf;
+  guint page_num;
+
+  page_num = gtk_notebook_get_current_page (GTK_NOTEBOOK (widget));
+
+  pixbuf = gtk_widget_render_icon (widget,
+				   (page_num % 2) ? GTK_STOCK_HELP : GTK_STOCK_STOP,
+				   GTK_ICON_SIZE_DND, NULL);
+
+  gtk_drag_set_icon_pixbuf (context, pixbuf, 0, 0);
+  g_object_unref (pixbuf);
+}
+
+static void
+on_button_drag_data_received (GtkWidget        *widget,
+			      GdkDragContext   *context,
+			      gint              x,
+			      gint              y,
+			      GtkSelectionData *data,
+			      guint             info,
+			      guint             time,
+			      gpointer          user_data)
+{
+  GtkWidget *source, *tab_label;
+  GtkWidget **child;
+
+  source = gtk_drag_get_source_widget (context);
+  child = (void*) data->data;
+
+  tab_label = gtk_notebook_get_tab_label (GTK_NOTEBOOK (source), *child);
+  g_print ("Removing tab: %s\n", gtk_label_get_text (GTK_LABEL (tab_label)));
+
+  gtk_container_remove (GTK_CONTAINER (source), *child);
+}
+
 static GtkWidget*
 create_notebook (gchar           **labels,
 		 gint              group_id,
@@ -131,10 +176,29 @@ create_notebook (gchar           **labels,
 
   g_signal_connect (GTK_NOTEBOOK (notebook), "page-reordered",
 		    G_CALLBACK (on_page_reordered), NULL);
-
+  g_signal_connect_after (G_OBJECT (notebook), "drag-begin",
+			  G_CALLBACK (on_notebook_drag_begin), NULL);
   return notebook;
 }
 
+static GtkWidget*
+create_trash_button (void)
+{
+  GtkWidget *button;
+
+  button = gtk_button_new_from_stock (GTK_STOCK_DELETE);
+
+  gtk_drag_dest_set (button,
+		     GTK_DEST_DEFAULT_MOTION | GTK_DEST_DEFAULT_DROP,
+		     button_targets,
+		     G_N_ELEMENTS (button_targets),
+		     GDK_ACTION_MOVE);
+
+  g_signal_connect_after (G_OBJECT (button), "drag-data-received",
+			  G_CALLBACK (on_button_drag_data_received), NULL);
+  return button;
+}
+
 gint
 main (gint argc, gchar *argv[])
 {
@@ -143,7 +207,7 @@ main (gint argc, gchar *argv[])
   gtk_init (&argc, &argv);
 
   window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
-  table = gtk_table_new (2, 2, TRUE);
+  table = gtk_table_new (3, 2, FALSE);
 
   gtk_notebook_set_window_creation_hook (window_creation_function, NULL);
 
@@ -163,6 +227,10 @@ main (gint argc, gchar *argv[])
 			     create_notebook (tabs4, GROUP_A, PACK_ALTERNATE, GTK_POS_RIGHT),
 			     1, 2, 1, 2);
 
+  gtk_table_attach (GTK_TABLE (table),
+		    create_trash_button (), 1, 2, 2, 3,
+		    GTK_EXPAND | GTK_FILL, GTK_SHRINK, 0, 0);
+
   gtk_container_add (GTK_CONTAINER (window), table);
   gtk_window_set_default_size (GTK_WINDOW (window), 400, 400);
   gtk_widget_show_all (window);