WPF: Ignore mouse clicks on overlay/adorner, but handle MouseEnter event
问题 What I really want is a version of IsHitTestVisible that ignores mouse click events but still traps mouse enter and leave events. Background: An informational overlay pops up under the control with focus whenever. This is a requirement, so I'm not at liberty to remove this behavior. This is implemented using an adorner containing a Rectangle shape, filled with an image brush. All controls are created programatically, no XAML involved. Desired behavior: When user mouses over the Rectangle, it