Revert "Correctly detect cancelled drag-and-drop operations in wxGTK."

This reverts r75745 (and r75749 fixing a minor problem in it) as this change
broke the reporting of the result of the drag and drop operation instead of
fixing it.

See #15930.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76649 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -61,7 +61,6 @@ All (GUI):
 wxGTK:
 
 - Support building wxGTK3 under Windows (Kolya Kosenko).
-- Correctly detect cancelled drag-and-drop operations (Kinaou Hervé).
 
 wxMSW:
 

src/gtk/dnd.cpp

@@ -311,9 +311,6 @@ static gboolean target_drag_drop( GtkWidget *widget,
     {
         wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned FALSE") );
 
-        // change drag and drop status if drop operation failed
-        gdk_drag_status( context, (GdkDragAction)0, time );
-
         /* cancel the whole thing */
         gtk_drag_finish( context,
                           FALSE,        /* no success */
@@ -368,9 +365,6 @@ static void target_drag_data_received( GtkWidget *WXUNUSED(widget),
 
     if (gtk_selection_data_get_length(data) <= 0 || gtk_selection_data_get_format(data) != 8)
     {
-        // change drag and drop status if drop operation failed
-        gdk_drag_status( context, (GdkDragAction)0, time );
-
         /* negative data length and non 8-bit data format
            qualifies for junk */
         gtk_drag_finish (context, FALSE, FALSE, time);
@@ -390,9 +384,6 @@ static void target_drag_data_received( GtkWidget *WXUNUSED(widget),
     {
         wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned true") );
 
-        // change drag and drop status if drop operation failed
-        gdk_drag_status( context, (GdkDragAction)0, time );
-
         /* tell GTK that data transfer was successful */
         gtk_drag_finish( context, TRUE, FALSE, time );
     }
@@ -889,14 +880,6 @@ wxDragResult wxDropSource::DoDragDrop(int flags)
     while (m_waiting)
         gtk_main_iteration();
 
-    if ( m_retValue != wxDragCancel &&
-         m_retValue != wxDragError )
-    {
-        // if wxDropTarget::OnDrop has been processed and has succeeded
-        // check the return value of wxDropTarget::OnData
-        m_retValue = ConvertFromGTK(gdk_drag_context_get_selected_action(context));
-    }
-
     g_signal_handlers_disconnect_by_func (m_iconWindow,
                                           (gpointer) gtk_dnd_window_configure_callback, this);