Qt设置鼠标样式

港控/mmm° 2023-07-05 11:51 23阅读 0赞

this->setMouseTracking(true);      //设置为不按下鼠标键触发moveEvent
    void mouseMoveEvent(QMouseEvent* event)
    {
        QPoint mousepos = event()->pos();
    
        //在坐标（0 ~ width，0 ~ height）范围内改变鼠标形状
        if(mousepos.rx() > 0 
           && mousepos.rx() < width
           && mousepos.ry() > 0
           && mousepos.ry() < height)
        {
               this->setCursor(Qt::CrossCursor);
        }
        else
        {
            this->setCursor(Qt::ArrowCursor);      //范围之外变回原来形状
        }
    }

鼠标形状对应的枚举值：

![format_png][]      Qt::ArrowCursor

![format_png 1][]       Qt::UpArrowCursor

![format_png 2][]      Qt::CrossCursor

![format_png 3][]      Qt::IBeamCursor

![format_png 4][]     Qt::WaitCursor

![format_png 5][]      Qt::BusyCursor

![format_png 6][]        Qt::ForbiddenCursor

![format_png 7][]       Qt::PointingHandCursor

![format_png 8][]     Qt::WhatsThisCursor

![format_png 9][]     Qt::SizeVerCursor

![format_png 10][]    Qt::SizeHorCursor

![format_png 11][]      Qt::SizeBDiagCursor

![format_png 12][]     Qt::SizeFDiagCursor

![format_png 13][]      Qt::SizeAllCursor

![format_png 14][]     Qt::SplitVCursor

![format_png 15][]    Qt::SplitHCursor

![format_png 16][]   Qt::OpenHandCursor

![format_png 17][]    Qt::ClosedHandCursor

箭头为空     Qt::BlankCursor

自定义鼠标形状：

Qcurosr *myCursor = new QCursor(QPixmap(":/images/custom.png"),-1,-1);    //-1,-1表示热点位于图片中心
    this->setCursor(*myCursor);

由图像构造QCursor时，第一个指定图像（由QPixmap构造）， 后面两个参数分别是鼠标x和y方向的热点，热点即鼠标点击的位置，设置为(0， 0)时， 鼠标点击位置位于图像左上角，设置为(-1, -1)时， 鼠标热点位于图像中心。

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