qt控件全屏后如何监听鼠标事件
时间: 2023-07-05 08:05:00 浏览: 61
在Qt中,可以通过重新实现QWidget的mousePressEvent、mouseReleaseEvent等事件来监听鼠标事件。当QWidget控件进入全屏模式时,你需要确保这些事件被正确地发送到该控件。
以下是一个示例代码,可以监听QLabel控件的鼠标事件:
```cpp
class FullScreenLabel : public QLabel
{
Q_OBJECT
public:
explicit FullScreenLabel(QWidget *parent = nullptr);
~FullScreenLabel();
protected:
void mousePressEvent(QMouseEvent *event) override;
void mouseReleaseEvent(QMouseEvent *event) override;
private:
QPoint m_lastPos;
};
FullScreenLabel::FullScreenLabel(QWidget *parent)
: QLabel(parent)
{
// 设置控件为全屏模式
setWindowState(Qt::WindowFullScreen);
}
FullScreenLabel::~FullScreenLabel()
{
}
void FullScreenLabel::mousePressEvent(QMouseEvent *event)
{
m_lastPos = event->globalPos();
}
void FullScreenLabel::mouseReleaseEvent(QMouseEvent *event)
{
QPoint newPos = event->globalPos();
int deltaX = newPos.x() - m_lastPos.x();
int deltaY = newPos.y() - m_lastPos.y();
// 处理鼠标事件
// ...
}
```
在这个示例中,我们重新实现了mousePressEvent和mouseReleaseEvent事件,并通过计算鼠标移动的偏移量处理了鼠标事件。当控件进入全屏模式时,我们可以在构造函数中设置窗口状态为Qt::WindowFullScreen。