qt mouseevent

在Qt中，QMouseEvent是用来封装鼠标事件的对象。它包含了一些参数来描述鼠标事件，比如鼠标的位置、按下的按钮等等。在处理鼠标事件时，我们可以重新实现QWidget的event handler，通过重写以下函数来添加自定义行为：mousePressEvent(QMouseEvent *event)，mouseReleaseEvent(QMouseEvent *event)，mouseDoubleClickEvent(QMouseEvent *event)，mouseMoveEvent(QMouseEvent *event)。这些函数分别对应鼠标按下、鼠标释放、鼠标双击和鼠标移动事件。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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