停靠在主窗口右侧时 QDockWidget 大小错误

I am new to Qt and I am trying to create a DockWidget that docks on the right of the window. I set a maximum and minimum width for the dock (as you will see in the code below). This works if the dock widget is added with Qt::LeftDockWidgetArea, but when it is added with Qt::RightDockWidgetArea, The dock is "padded" out to the center of the window, like this:

我可能没有以正确的方式调整扩展坞的大小。这是此窗口的代码：

int main(int argv, char** args)
{
    QApplication app(argv, args);
    QMainWindow window;
    QDesktopWidget* desktop = QApplication::desktop();
    //Docks
    QDockWidget* propertyDock = new QDockWidget("",&window);
    QWidget* propertyDockContents = new QWidget;

    //This sets the window in the center of the screen.
    int wWidth = 800; int wHeight = 600;
    window.setGeometry(QRect( (desktop->width()-wWidth)/2 , (desktop->height()-wHeight)/2 ,wWidth,wHeight));

    propertyDock->setAllowedAreas(Qt::RightDockWidgetArea);
    propertyDockContents->setMaximumWidth(200);
    propertyDockContents->setMinimumWidth(20);

    propertyDock->setWidget(propertyDockContents);
    window.addDockWidget(Qt::RightDockWidgetArea,propertyDock);

    window.show();

    return app.exec();
}

有没有“正确”的方法来做到这一点？

如文档中所述：

注意：不支持创建没有中央小部件的主窗口。您必须有一个中心小部件，即使它只是一个占位符。