QWidget.show导致界面卡住解决方法

graphwidgt::graphwidgt(QWidget *parent) :    QGraphicsView(parent), m_pageOffset(0), top(1), bottom(2), row(1), col(0), left(0), right(0){    num = 0;    //解决中文乱码问题    QTextCodec *codec = QTextCodec::codecForName("GB2312");    QTextCodec::setCodecForLocale(codec);    QTextCodec::setCodecForCStrings(codec);    QTextCodec::setCodecForTr(codec);#if 0     connect(&m_pageAnimator, SIGNAL(frameChanged(int)), SLOT(shiftPage(int)));    m_pageAnimator.setDuration(600);    m_pageAnimator.setFrameRange(0, 1000);    m_pageAnimator.setCurveShape(QTimeLine::LinearCurve);    m_pageAnimator.setUpdateInterval(5);#endif    m_pChildView = NULL;    QGraphicsScene *m_scene = new QGraphicsScene(this);    //原点在中心点    m_scene->setSceneRect(sceneCenterX, sceneCenterY, 320, 240);    //不使用index作为item搜索，index适用于静态scene    m_scene->setItemIndexMethod(QGraphicsScene::NoIndex);    /* 将元素背景图片添加到列表中 */    QList<QPixmap> pixmaps;    QDirIterator it(":/", QStringList() << "*.png");    while (it.hasNext() && pixmaps.size() < mouseCount)    {        pixmaps << it.next();    }    m_pWidget = new QGraphicsWidget();    m_group = new QGraphicsItemGroup(m_pWidget);    /******************/    int i = 100;    int num = 0;    /* 添加menu元素 */    for (int j = 0; j < rowCounts; j++)    {        //QGraphicsItemGroup *group = m_scene->createItemGroup(m_scene->selectedItems());        for (int k = 0; k < colCounts; k++)        {            num++;            QPixmap pixmap(pixmaps.at(num % pixmaps.size()));            //pixmap = pixmap.scaledToWidth(200);            QZteLabel *item = new QZteLabel(this);            item->setPixmap(pixmap);            m_scene->addItem(item);            item->setPos(200 * k + 100, 50 + 230 * j);            //item->setZValue(1);            m_positions[j] << QPointF(item->QGraphicsPixmapItem::pos().x(), item->QGraphicsPixmapItem::pos().y());            m_items[j] << item;            m_group->addToGroup(item);        }        //m_group.append(group);    }//    m_scene->addItem(m_group);    m_scene->addItem(m_pWidget);   setScene(m_scene);    //view.centerOn((sceneCenterX + sceneWidth) / 2, (sceneCenterY + sceneHeight) / 2);    //渲染提示，Antialiasing使得边缘平滑，效果非常好，QPainter是低层次的绘图//    setRenderHint(QPainter::Antialiasing);    //代替默认背景    //setBackgroundBrush(QPixmap(":/background/background.png"));    //setStyleSheet("background:transparent");    setAttribute(Qt::WA_TranslucentBackground, true);    setWindowFlags(Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint);    //setWindowFlags(Qt::WType_TopLevel|Qt::WStyle_StaysOnTop);    setCacheMode(QGraphicsView::CacheBackground);    //刷新模式，矩形刷新    setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);    //view.setDragMode(QGraphicsView::ScrollHandDrag);    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);    setAlignment(Qt::AlignLeft | Qt::AlignTop);    //QT_TRANSLATE_NOOP固定标题，中文乱码问题    setWindowTitle(QT_TRANSLATE_NOOP(QGraphicsView, "Colliding Mice 老鼠"));    //QList<>remove有问题    //view.items().removeAt(0);    //resize有可能导致无穷递归    resize(viewWidth, viewHight);    QRectF boundingRect = m_items[0][1]->boundingRect();    on_actionZoom_Widget_triggered();#if 0    m_Timer.setInterval(100);    connect(&m_Timer, SIGNAL(timeout()), this, SLOT(slideUp()));    m_Timer.start(3000);#endif}