void CheckDrop(object sender, System.Windows.DragEventArgs e)
{
var types = e.Data.GetFormats().Select(DataConverter.ToXwtTransferType).ToArray();
var pos = e.GetPosition(Widget).ToXwtPoint();
var proposedAction = DetectDragAction(e.KeyStates);
e.Handled = true; // Prevent default handlers from being used.
if ((enabledEvents & WidgetEvent.DragOverCheck) > 0)
{
var checkArgs = new DragOverCheckEventArgs(pos, types, proposedAction);
Context.InvokeUserCode(delegate {
eventSink.OnDragOverCheck(checkArgs);
});
if (checkArgs.AllowedAction == DragDropAction.None)
{
e.Effects = currentDragEffect = DragDropEffects.None;
return;
}
if (checkArgs.AllowedAction != DragDropAction.Default)
{
e.Effects = currentDragEffect = checkArgs.AllowedAction.ToWpfDropEffect();
return;
}
}
if ((enabledEvents & WidgetEvent.DragOver) > 0)
{
var store = new TransferDataStore();
FillDataStore(store, e.Data); //, DragDropInfo.TargetTypes);
var args = new DragOverEventArgs(pos, store, proposedAction);
OnDragOver(sender, args);
if (args.AllowedAction == DragDropAction.None)
{
e.Effects = currentDragEffect = DragDropEffects.None;
return;
}
if (args.AllowedAction != DragDropAction.Default)
{
e.Effects = currentDragEffect = args.AllowedAction.ToWpfDropEffect();
return;
}
}
e.Effects = currentDragEffect = proposedAction.ToWpfDropEffect();
}
void WidgetDragOverHandler(object sender, System.Windows.DragEventArgs e)
{
var types = e.Data.GetFormats().Select(t => t.ToXwtTransferType()).ToArray();
var pos = e.GetPosition(Widget).ToXwtPoint();
var proposedAction = DetectDragAction(e.KeyStates);
e.Handled = true; // Prevent default handlers from being used.
if (Adorner != null)
{
var w = GetParentWindow();
var v = (UIElement)w.Content;
if (w != AdornedWindow)
{
AdornedLayer.Remove(Adorner);
AdornedWindow.AllowDrop = false;
AdornedWindow.DragOver -= AdornedWindowOnDragOver;
AdornedWindow = w;
AdornedWindow.AllowDrop = true;
AdornedWindow.DragOver += AdornedWindowOnDragOver;
AdornedLayer = AdornerLayer.GetAdornerLayer(v);
AdornedLayer.Add(Adorner);
}
Adorner.Offset = e.GetPosition(v);
}
if ((enabledEvents & WidgetEvent.DragOverCheck) > 0)
{
var checkArgs = new DragOverCheckEventArgs(pos, types, proposedAction);
Context.InvokeUserCode(delegate {
eventSink.OnDragOverCheck(checkArgs);
});
if (checkArgs.AllowedAction == DragDropAction.None)
{
e.Effects = currentDragEffect = DragDropEffects.None;
return;
}
if (checkArgs.AllowedAction != DragDropAction.Default)
{
e.Effects = currentDragEffect = checkArgs.AllowedAction.ToWpfDropEffect();
return;
}
}
if ((enabledEvents & WidgetEvent.DragOver) > 0)
{
var store = new TransferDataStore();
FillDataStore(store, e.Data, DragDropInfo.TargetTypes);
var args = new DragOverEventArgs(pos, store, proposedAction);
OnDragOver(sender, args);
if (args.AllowedAction == DragDropAction.None)
{
e.Effects = currentDragEffect = DragDropEffects.None;
return;
}
if (args.AllowedAction != DragDropAction.Default)
{
e.Effects = currentDragEffect = args.AllowedAction.ToWpfDropEffect();
return;
}
}
e.Effects = currentDragEffect = proposedAction.ToWpfDropEffect();
}
