private IDropTarget findDropTarget(AbstractBlock draggedData)
{
if (draggedData == null)
return null;
foreach (AbstractBlock target in _lDropTarget)
{
if (draggedData == target)
continue;
if (!target.IsAllowBlockType(draggedData))
continue;
Rect bigBlockRect;
AbstractBlock smallBlock = null;
if (target.Width < draggedData.Width)
{
bigBlockRect = draggedData.GetRect();
smallBlock = target;
}
else
{
bigBlockRect = target.GetRect();
smallBlock = draggedData;
}
if (bigBlockRect.Contains(smallBlock.GetLeftTop())
|| bigBlockRect.Contains(smallBlock.GetRightTop())
|| bigBlockRect.Contains(smallBlock.GetLeftBottom())
|| bigBlockRect.Contains(smallBlock.GetRightBottom()))
{
return target as IDropTarget;
}
}
return null;
}