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QDockWidget Draggable Tabs

Asked 2011-02-24T03:04:33.790
22

I am using QDockWidgets and placing two of them on the left side of my application so that tabs can be used to select between them. However, Qt's default behavior for this looks horrible and is unintuitive. Instead of being able to drag the tabs to move the widgets, it places another bar below the selected tab (with the same name) that must be dragged instead. As a user, it would be hard to figure this out.

enter image description here

(My QDockWidgets are "Attributes" and "Library")

Is there a way to get rid of this second bar and make it so I can move my QDockWidgets by dragging the tabs themselves?

c++ qt tabs qdockwidget
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2 Answers

4

As far as I can see from QDockWidget::mousePressEvent implementation in src/gui/widgets/qdockwidget.cpp dragging the dockwidgets using tabs is NOT possible:

QDockWidgetLayout *dwLayout
    = qobject_cast<QDockWidgetLayout*>(layout);

if (!dwLayout->nativeWindowDeco()) {
    QRect titleArea = dwLayout->titleArea();

    if (event->button() != Qt::LeftButton ||
        !titleArea.contains(event->pos()) ||
        // check if the tool window is movable... do nothing if it
        // is not (but allow moving if the window is floating)
        (!hasFeature(this, QDockWidget::DockWidgetMovable) && !q->isFloating()) ||
        qobject_cast<QMainWindow*>(parent) == 0 ||
        isAnimating() || state != 0) {
        return false;
    }

    initDrag(event->pos(), false);
    ....

As you can see from the implementation one of the things that the QDockWidget checks before allowing undocking is whether the mouse press event has come from title bar or not.

answered 2012-02-16T16:01:59.027
0

I also think that setTitleBarWidget() really does the trick. I remember seeing it being used for a similar purpose in the source code of the Amarok music player. Amarok has a QMainWindow which only contains dock widgets. You might want to have a look at the source code there.

answered 2012-09-12T09:21:35.670

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