WPF：画布鼠标事件不在空白空间上触发 [英] WPF: Canvas mouse events not firing on empty space

问题描述

我已经在 Canvas 上设置了鼠标事件，如下所示：

I have set mouse events on a Canvas as follows:

<Canvas MouseUp="CanvasUp" MouseDown="CanvasDown" MouseMove="CanvasMove">
...
</Canvas>

但是这些仅在诸如 Image 和 Rectangle ，而不是在空白处。
我该如何解决？

But these are active only on the child elements like Image and Rectangle, not on the empty space. How can I solve this?

推荐答案

没有背景颜色设置（明确或通过样式等）的控件将

A control with no background color set (explicitly or through styles etc) will default to having a background color of null - making it not hit-testable.

如果将背景设置为透明（或除null（<$ c之外的任何其他值），则默认为背景色-使其不可命中测试。 $ c> {x：Null} ）），它将能够拾取鼠标事件

If you set the background to "Transparent" (or anything other than null ({x:Null})) then it will be able to pick up the mouse events

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