GtkNotebookset_tab_detachable

Sets whether the tab can be detached from notebook to another notebook or widget.

Note that 2 notebooks must share a common group identificator (see gtk_notebook_set_group_name()) to allow automatic tabs interchange between them.

If you want a widget to interact with a notebook through DnD (i.e.: accept dragged tabs from it) it must be set as a drop destination and accept the target “GTK_NOTEBOOK_TAB”. The notebook will fill the selection with a GtkWidget** pointing to the child widget that corresponds to the dropped tab.

Note that you should use gtk_notebook_detach_tab() instead of gtk_container_remove() if you want to remove the tab from the source notebook as part of accepting a drop. Otherwise, the source notebook will think that the dragged tab was removed from underneath the ongoing drag operation, and will initiate a drag cancel animation.

 static void
 on_drag_data_received (GtkWidget        *widget,
                        GdkDragContext   *context,
                        gint              x,
                        gint              y,
                        GtkSelectionData *data,
                        guint             info,
                        guint             time,
                        gpointer          user_data)
 {
   GtkWidget *notebook;
   GtkWidget **child;

   notebook = gtk_drag_get_source_widget (context);
   child = (void*) gtk_selection_data_get_data (data);

   // process_widget (*child);

   gtk_notebook_detach_tab (GTK_NOTEBOOK (notebook), *child);
 }

If you want a notebook to accept drags from other widgets, you will have to set your own DnD code to do it.

Available since: 2.10