protected virtual void OnPreviewDragHint(PreviewDragHintEventArgs e)
{
EventHandler <PreviewDragHintEventArgs> eh = this.Events[PreviewDragHintEventKey] as EventHandler <PreviewDragHintEventArgs>;
if (eh != null)
{
eh(this, e);
}
}
protected virtual void OnPreviewDragHint(PreviewDragHintEventArgs e)
{
EventHandler <PreviewDragHintEventArgs> eventHandler = this.Events[RadDragDropService.PreviewDragHintEventKey] as EventHandler <PreviewDragHintEventArgs>;
if (eventHandler == null)
{
return;
}
eventHandler((object)this, e);
}
protected virtual bool PrepareContext()
{
//remember the cursor so that we may restore it when service is stopped.
this.originalMouseCursor = Cursor.Current;
RadItem contextElement = this.Context as RadItem;
if (!contextElement.Capture)
{
contextElement.Capture = true;
}
//prepare the hint window
ISupportDrag dragObject = this.Context as ISupportDrag;
PreviewDragHintEventArgs args = new PreviewDragHintEventArgs(dragObject);
this.OnPreviewDragHint(args);
if (args.DragHint == null && args.UseDefaultHint)
{
args.DragHint = dragObject.GetDragHint();
}
this.hintWindow.BackgroundImage = args.DragHint;
Size offsetSize;
if (args.DragHint == null)
{
offsetSize = contextElement == null ? Size.Empty : contextElement.Size;
}
else
{
offsetSize = args.DragHint.Size;
}
this.xOutlineFormOffset = offsetSize.Width / 2;
this.yOutlineFormOffset = offsetSize.Height / 2;
return(true);
}
protected virtual bool PrepareContext()
{
this.originalMouseCursor = Cursor.Current;
RadItem context1 = this.Context as RadItem;
if (!context1.Capture)
{
context1.Capture = true;
}
ISupportDrag context2 = this.Context as ISupportDrag;
PreviewDragHintEventArgs e = new PreviewDragHintEventArgs(context2);
this.OnPreviewDragHint(e);
if (e.DragHint == null && e.UseDefaultHint)
{
e.DragHint = context2.GetDragHint();
}
this.hintWindow.BackgroundImage = e.DragHint;
Size size = e.DragHint != null ? e.DragHint.Size : (context1 == null ? Size.Empty : context1.Size);
this.xOutlineFormOffset = size.Width / 2;
this.yOutlineFormOffset = size.Height / 2;
return(true);
}