Changed CanPaste to just check IsSupported.

[wxWidgets.git] / src / gtk / dnd.cpp

diff --git a/src/gtk/dnd.cpp b/src/gtk/dnd.cpp
index 745dec2fdb162fe8c298489e8a37b6356d0ce99d..a95bf1c889202e58aa569d587fc9a8c9d0b41bb1 100644 (file)
--- a/src/gtk/dnd.cpp
+++ b/src/gtk/dnd.cpp
@@ -50,6 +50,11 @@ extern void wxapp_uninstall_thread_wakeup();
 
 extern bool g_blockEventsOnDrag;
 
+// the trace mask we use with wxLogTrace() - call
+// wxLog::AddTraceMask(TRACE_DND) to enable the trace messages from here
+// (there are quite a few of them, so don't enable this by default)
+static const wxChar *TRACE_DND = _T("dnd");
+
 //----------------------------------------------------------------------------
 // standard icons
 //----------------------------------------------------------------------------
@@ -226,11 +231,16 @@ static gboolean target_drag_drop( GtkWidget *widget,
     if (context->suggested_action == GDK_ACTION_COPY) result = wxDragCopy;
 */
 
+    /* reset the block here as someone might very well
+       show a dialog as a reaction to a drop and this
+       wouldn't work without events */
+    g_blockEventsOnDrag = FALSE;
+
     bool ret = drop_target->OnDrop( x, y );
 
     if (!ret)
     {
-        wxLogDebug( wxT( "Drop target: OnDrop returned FALSE") );
+        wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned FALSE") );
 
         /* cancel the whole thing */
         gtk_drag_finish( context,
@@ -240,7 +250,7 @@ static gboolean target_drag_drop( GtkWidget *widget,
     }
     else
     {
-        wxLogDebug( wxT( "Drop target: OnDrop returned TRUE") );
+        wxLogTrace(TRACE_DND, wxT( "Drop target: OnDrop returned TRUE") );
 
 #if wxUSE_THREADS
         /* disable GUI threads */
@@ -306,7 +316,7 @@ static void target_drag_data_received( GtkWidget *WXUNUSED(widget),
         return;
     }
 
-    wxLogDebug( wxT( "Drop target: data received event") );
+    wxLogTrace(TRACE_DND, wxT( "Drop target: data received event") );
 
     /* inform the wxDropTarget about the current GtkSelectionData.
        this is only valid for the duration of this call */
@@ -320,14 +330,14 @@ static void target_drag_data_received( GtkWidget *WXUNUSED(widget),
 
     if ( wxIsDragResultOk( drop_target->OnData( x, y, result ) ) )
     {
-        wxLogDebug( wxT( "Drop target: OnData returned TRUE") );
+        wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned TRUE") );
 
         /* tell GTK that data transfer was successfull */
         gtk_drag_finish( context, TRUE, FALSE, time );
     }
     else
     {
-        wxLogDebug( wxT( "Drop target: OnData returned FALSE") );
+        wxLogTrace(TRACE_DND, wxT( "Drop target: OnData returned FALSE") );
 
         /* tell GTK that data transfer was not successfull */
         gtk_drag_finish( context, FALSE, FALSE, time );
@@ -401,7 +411,8 @@ GdkAtom wxDropTarget::GetMatchingPair()
         wxDataFormat format( formatAtom );
 
 #ifdef __WXDEBUG__
-        wxLogDebug( wxT("Drop target: drag has format: %s"), format.GetId().c_str() );
+        wxLogTrace(TRACE_DND, wxT("Drop target: drag has format: %s"),
+                   format.GetId().c_str());
 #endif // Debug
 
         if (m_dataObject->IsSupportedFormat( format ))
@@ -499,7 +510,8 @@ source_drag_data_get  (GtkWidget          *WXUNUSED(widget),
 
     wxDataFormat format( selection_data->target );
 
-    wxLogDebug( wxT("Drop source: format requested: %s"), format.GetId().c_str() );
+    wxLogTrace(TRACE_DND, wxT("Drop source: format requested: %s"),
+               format.GetId().c_str());
 
     drop_source->m_retValue = wxDragCancel;
 
@@ -507,19 +519,19 @@ source_drag_data_get  (GtkWidget          *WXUNUSED(widget),
 
     if (!data)
     {
-        wxLogDebug( wxT("Drop source: no data object") );
+        wxLogTrace(TRACE_DND, wxT("Drop source: no data object") );
         return;
     }
 
     if (!data->IsSupportedFormat(format))
     {
-        wxLogDebug( wxT("Drop source: unsupported format") );
+        wxLogTrace(TRACE_DND, wxT("Drop source: unsupported format") );
         return;
     }
 
     if (data->GetDataSize(format) == 0)
     {
-        wxLogDebug( wxT("Drop source: empty data") );
+        wxLogTrace(TRACE_DND, wxT("Drop source: empty data") );
         return;
     }
 
@@ -558,9 +570,9 @@ source_drag_data_get  (GtkWidget          *WXUNUSED(widget),
 // "drag_data_delete"
 //----------------------------------------------------------------------------
 
-static void source_drag_data_delete( GtkWidget          *WXUNUSED(widget),
-                                     GdkDragContext     *WXUNUSED(context),
-                                     wxDropSource       *WXUNUSED(drop_source) )
+static void source_drag_data_delete( GtkWidget *WXUNUSED(widget),
+                                     GdkDragContext *context,
+                                     wxDropSource *WXUNUSED(drop_source) )
 {
     if (g_isIdle)
         wxapp_install_idle_handler();
@@ -740,8 +752,12 @@ wxDragResult wxDropSource::DoDragDrop( bool allowMove )
     if (m_data->GetFormatCount() == 0)
         return (wxDragResult) wxDragNone;
 
+    // still in drag
+    if (g_blockEventsOnDrag)
+        return (wxDragResult) wxDragNone;
+
     // disabled for now
-    g_blockEventsOnDrag = FALSE;
+    g_blockEventsOnDrag = TRUE;
 
     RegisterWindow();
 
@@ -754,7 +770,7 @@ wxDragResult wxDropSource::DoDragDrop( bool allowMove )
     for (size_t i = 0; i < m_data->GetFormatCount(); i++)
     {
         GdkAtom atom = array[i];
-        wxLogDebug( wxT("Drop source: Supported atom %s"), gdk_atom_name( atom ) );
+        wxLogTrace(TRACE_DND, wxT("Drop source: Supported atom %s"), gdk_atom_name( atom ));
         gtk_target_list_add( target_list, atom, 0, 0 );
     }
     delete[] array;
@@ -784,11 +800,12 @@ wxDragResult wxDropSource::DoDragDrop( bool allowMove )
     /* don't start dragging if no button is down */
     if (button_number)
     {
-        GdkDragAction action = GDK_ACTION_COPY;
-        if (allowMove) action = (GdkDragAction)(GDK_ACTION_MOVE|GDK_ACTION_COPY);
+        int action = GDK_ACTION_COPY;
+        if ( allowMove )
+            action |= GDK_ACTION_MOVE;
         GdkDragContext *context = gtk_drag_begin( m_widget,
                 target_list,
-                action,
+                (GdkDragAction)action,
                 button_number,  /* number of mouse button which started drag */
                 (GdkEvent*) &event );