Basically, I have a DataTemplate that defines the items in an ItemsControl and I want to pop a speech bubble above the item when it's clicked. So far, my attempts lead to my adorner showing up inside the DataTemplate and being clipped by the bounds of that DataTemplate instead of being above it. I've been using a nifty adorner control that can be found here: Basically, I have a DataTemplate that defines t
阅读背景：
我可以在数据模板之外的DataTemplate项目中添加装饰器吗？
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