QScrollarea and touch

Andy314

I want use the QScrollarea on a tablet. There are 2 main problems.

Touch-Scrolling works only with 2 fingers.
Is there a way to enable 1 finger scrolling for the scroll area to give it a consistent GUI for QML/Widget mixed apps.
If I touch with 2 fingers on a QPushButton, scroll and then lift my fingers I get a clickEvent from the button, but I want only scrolling.

Is there a solution for the problem ?

micland

@Andy314
I'm not sure if the following snippet solves your problem since I have no display near by - but in a project some years ago I setup the scrollArea as followed. Just try - and forget my conment if it does not work... ;-)

        // hide scrollbars
        scrollArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
        scrollArea->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
        // configure gesture and add rubberband effect
        QScroller::grabGesture(scrollArea, QScroller::LeftMouseButtonGesture);

Andy314

Hello @micland,

wow, it works and is so simple. Qt surprises again, there are certainly much more feature of Qt I dont know.

Thank you very much for this tip, it solves a lot of problem for my project. :-)

micland

@Andy314
Fine, you're welcome :)
I remember I had a similiar problem years ago and found that snippet in one of the examples - but I was not sure if my problem was exactly the same that you had. Seems so...

DaveK 0

Have you tried using QScroller::grabGesture(scrollArea, QScroller::LeftMouseButtonGesture); on a QWidgets application with multiple QScrollAreas?

Has that presented any problems for you?