Пример #1
0
void PlayLabel::wheelEvent(QWheelEvent *event)
{
    if(m_bSelected)
    {
        int numDegrees = event->delta() / 8;//滚动的角度,*8就是鼠标滚动的距离
        int numSteps = numDegrees / 15;//滚动的步数,*15就是鼠标滚动的角度
        if(numSteps < 0)
        {
            qDebug()<<"steps is zoomout "<<numSteps<<",label id is "<<m_iResID;
            onBtZoomOutClicked();
        }

        if(numSteps > 0)
        {
            qDebug()<<"steps is zoomin "<<numSteps<<",label id is "<<m_iResID;
            onBtZoomInClicked();
        }

        //以下没用
        if (event->orientation() == Qt::Horizontal) {
            scrollHorizontally(numSteps);       //水平滚动
        } else {
            scrollVertically(numSteps);       //垂直滚动
        }
        event->accept();      //接收该事件
    }
}
Пример #2
0
//! [0]
void MyWidget::wheelEvent(QWheelEvent *event)
{
    int numDegrees = event->delta() / 8;
    int numSteps = numDegrees / 15;

    if (event->orientation() == Qt::Horizontal) {
        scrollHorizontally(numSteps);
    } else {
        scrollVertically(numSteps);
    }
    event->accept();
}