QDockWidget用法

 QDockWidget * dok = new QDockWidget;
    dok->setFeatures(QDockWidget::AllDockWidgetFeatures); //指定停靠窗體的樣式，此處爲可移動AllDockWidgetFeatures
    dok->setAllowedAreas(Qt::AllDockWidgetAreas);
    chatwindow * dokwind = new chatwindow("dok");
    dok->setWidget(dokwind);
    w.addDockWidget(Qt::RightDockWidgetArea,dok);
    dok = new QDockWidget;
    dok->setFeatures(QDockWidget::AllDockWidgetFeatures); //指定停靠窗體的樣式，此處爲可移動AllDockWidgetFeatures
    dok->setAllowedAreas(Qt::AllDockWidgetAreas);
    dokwind = new chatwindow("dok");
    dok->setWidget(dokwind);
    w.addDockWidget(Qt::RightDockWidgetArea,dok);