[提问]qt的KeyPressEvent（键盘）事件来 控制 button [复制链接]

我重写了qt的KeyPressEvent（键盘）事件来 控制 button，使button聚焦，为什么不起作用啊？

这几个键要焦点在当前控件上才能响应的

下面是我写的事件处理的函数，让button聚焦，但是没起效果
void Disk_Operate::keyPressEvent(QKeyEvent *event)
{
    switch(event->key())
    {

    case Qt::Key_Right:
        qDebug()<<"右键按下";
        if(0 == focusbutton)
        {
            buttonlist[focusbutton+1]->setFocus();
            focusbutton +=1;
        }
        if(1 == focusbutton)
        {
            buttonlist[focusbutton-1]->setFocus();
            focusbutton -=1;
        }
        setFocus();
        break;
    case Qt::Key_Left:
        if(0 == focusbutton)
        {
            buttonlist[focusbutton+1]->setFocus();
            focusbutton +=1;
        }
        if(1 == focusbutton)
        {
            buttonlist[focusbutton -1]->setFocus();
            focusbutton -=1;
        }
        setFocus();
        break;
    case Qt::Key_Return:
        if( 0 == focusbutton)
            emit send_disinfo();
        else
            if(1 == focusbutton)
                emit send_disinfo();
        break;
    case Qt::Key_Escape:
        emit show_prewidget();
        break;
    default:
        QWidget::keyPressEvent(event);
        setFocus();



    }
}  

那你那个事件处理是怎么写的了？？？，你就这样提问，人家怎么回答你的问题？