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Update 事件和信号.md

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maicss 2019-03-11 20:22:27 +08:00 committed by GitHub
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事件和信号.md
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@ -228,7 +228,7 @@ X Y坐标显示在`QLabel`组件里
```
self.setMouseTracking(True)
```
鼠标追踪默认没有开启，当有鼠标点击事件发生后才会开启。
事件追踪默认没有开启，当开启后才会追踪鼠标的点击事件。
```
def mouseMoveEvent(self, e):