QGraphicsScene QGraphicsProxyWidge 窗口件焦点切换问题 [复制链接]

在使用QGraphicsScene 架构中显示窗口和按钮，按钮左右移动时显示按钮对应的窗口，使用代理窗口QGraphicsProxyWidge 将写好的QWidge添加到
Scene 中要实现左右键切换显示的窗口内容，按确认键进入相应的窗口，使窗口获取焦点，但是现在使用代理这种方式，窗口的焦点无法获取，只能左右切换显示的窗口，求解
附效果图：

界面设计的不错，就是有点暗！

我也大概只能说
界面设计的挺华丽……

还是出了点问题。。。。

按键事件：
void ParallaxHome::keyPressEvent(QKeyEvent *event)
{
    if (event->key() == Qt::Key_Right)
    {
        m_naviBar->setPageOffset(+1);
        printf("the right offset is %d\n",offset);
        m_scene.addItem(Proxy_items[offset]);
        Proxy_items[offset]->setPos(330,100);
        Proxy_items[offset]->setZValue(2);
        Proxy_items[offset-1]->close();
        ++offset;
    }
    else if (event->key() == Qt::Key_Left)
    {
        m_naviBar->setPageOffset(-1);
        m_scene.addItem(Proxy_items[offset]);
        Proxy_items[offset]->setPos(330,100);
        Proxy_items[offset]->setZValue(2);
        Proxy_items[offset+1]->close();
        --offset;
    }
    else if((event->key() == Qt::Key_Space)
    {
            Proxy_items[offset]->setFocus();
        }
}


构造函数：
ParallaxHome::ParallaxHome():QGraphicsView(),m_pageOffset(0)
{
    setRenderHint(QPainter::Antialiasing, true);
    setBackgroundBrush(QPixmap(":/images/bottom.png"));
    setupScene();
    setScene(&m_scene);
    mytimeid=startTimer(1000);
    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);//去掉滑动条
    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    setFrameShape(QFrame::NoFrame);
    setWindowTitle("Parallax Home");
    num=0;
    offset=1;
}


void ParallaxHome::setupScene()
{
        for (int i=0;i<8;i++)
        {
                proxy = new QGraphicsProxyWidget;
                Proxy_items<<proxy;
        }
        m_naviBar = new NaviBar;
        m_scene.addItem(m_naviBar);
        m_naviBar->setZValue(2);


        m_d_tv = new d_tv;
        Proxy_items[0]->setWidget(m_d_tv);
        m_scene.addItem(Proxy_items[0]);
        Proxy_items[0]->setPos(330,100);
        Proxy_items[0]->setZValue(2);


        m_epg = new epg;
        Proxy_items[1]->setWidget(m_epg);

        m_set = new set;
        Proxy_items[2]->setWidget(m_set);

        m_set = new set;
        Proxy_items[3]->setWidget(m_set);

        m_user = new user;
        Proxy_items[4]->setWidget(m_user);

        m_cast = new cast;
        Proxy_items[5]->setWidget(m_cast);

        m_game = new game;
        Proxy_items[6]->setWidget(m_game);

        m_demand = new demand;
        Proxy_items[7]->setWidget(m_demand);


        m_scene.setItemIndexMethod(QGraphicsScene::NoIndex);
}

另外：我是新手，呵呵