C++ (Cpp) QDockWidget::setFocusPolicy示例

void MainWindow::createHeader()
{
//    QToolBar *tb = new QToolBar(this);
    QDockWidget *header = new QDockWidget(this);
    QHBoxLayout *ly = new QHBoxLayout();
    QFrame *frm = new QFrame();
    QPushButton *pbExit = new QPushButton();
    pbExit->setIcon(QIcon(":/images/meiti-up.png"));
    pbExit->setIconSize(QSize(40,40));

    pbExit->setFocusPolicy(Qt::NoFocus);
    pbExit->setFocusProxy(0);
    pbExit->setStyleSheet(QString("background-image: url(:/images/meiti-up.png);\n\n#pbExit:pressed {background-image: url(:/images/meiti-down.png) 4 4 4 4 strech strech;}\n\n#pbExit:hover {background-image: url(:/images/meiti-over.png) 4 4 4 4 strech strech;}\n"));

    connect(pbExit, SIGNAL(clicked()), qApp, SLOT(quit()));


    ly->addWidget(pbExit);
    ly->setAlignment(pbExit,Qt::AlignCenter);
    frm->setLayout(ly);
    frm->setAttribute(Qt::WA_TranslucentBackground, true);        // 设置背景透明（version >= QT4.5

    header->setWidget(frm);

    header->setAttribute(Qt::WA_TranslucentBackground, true);        // 设置背景透明（version >= QT4.5

    //header->setWindowFlags(Qt::FramelessWindowHint);
    header->setWindowTitle(QString(""));
    header->setTitleBarWidget(new QWidget);
    header->setFocusPolicy(Qt::NoFocus);
    header->setFocusProxy(0);
    header->setFeatures(QDockWidget::NoDockWidgetFeatures);
    header->setBaseSize(0,40);

    addDockWidget(Qt::TopDockWidgetArea,header, Qt::Horizontal);

//    tb->addWidget(frm);
//    pbExit->setText(QString("%1--%2--%3").arg(this->width()).arg(tb->width()).arg(pbExit->width()));
//
//    tb->setMovable(false);
//
//    this->addToolBar(tb);

//	dockWidget->setWidget(keyboardfrm);
//	dockWidget->setAllowedAreas(Qt::BottomDockWidgetArea);
//	dockWidget->setFeatures(QDockWidget::DockWidgetClosable);
//	addDockWidget(Qt::BottomDockWidgetArea,dockWidget);
}