[GTK] Drag&Drop fix0.1

Use the Move action by default when no specific
action has been set.

1 files changed, 13 insertions, 5 deletions

diff --git a/Xwt.Gtk/Xwt.GtkBackend/WidgetBackend.cs b/Xwt.Gtk/Xwt.GtkBackend/WidgetBackend.cs
index 0e8bec95..8c94af54 100755
--- a/Xwt.Gtk/Xwt.GtkBackend/WidgetBackend.cs
+++ b/Xwt.Gtk/Xwt.GtkBackend/WidgetBackend.cs
@@ -975,12 +975,20 @@ namespace Xwt.GtkBackend
 
 			if (DragDropInfo.DragDataRequests == 0) {
 				if (DragDropInfo.DragDataForMotion) {
-					// This is a workaround to what seems to be a mac gtk bug.
-					// Suggested action is set to all when no control key is pressed
+					// If no specific action is set, it means that no key has been pressed.
+					// In that case, use Move or Copy or Link as default (when allowed, in this order).
 					var cact = ConvertDragAction (context.Actions);
-					if (cact == DragDropAction.All)
-						cact = DragDropAction.Move;
-					
+					if (cact != DragDropAction.Copy && cact != DragDropAction.Move && cact != DragDropAction.Link) {
+						if (cact.HasFlag (DragDropAction.Move))
+							cact = DragDropAction.Move;
+						else if (cact.HasFlag (DragDropAction.Copy))
+							cact = DragDropAction.Copy;
+						else if (cact.HasFlag (DragDropAction.Link))
+							cact = DragDropAction.Link;
+						else
+							cact = DragDropAction.None;
+					}
+
 					DragOverEventArgs da = new DragOverEventArgs (DragDropInfo.LastDragPosition, DragDropInfo.DragData, cact);
 					Toolkit.Invoke (delegate {
 						EventSink.OnDragOver (da);