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c++qtscrollbarqscrollarea
Mike Shaw
Mike Shaw

Reputation: 393

qt conflict between QScroller and QScrollBar

I found a conflict between QScroller and QScrollBar. So I have a QScrollArea with vertical scrollbar. I also activate a QScroller that allows me to do kinetic scrolling with left click button. But I can't grab the scrollbar handle any more. Because once I grab it, QScroller begins to take over. This is how I add the QScroller:

QScroller::grabGesture(mArea, QScroller::LeftMouseButtonGesture) ;

Any idea how can I slove the conflict?

Upvotes: 3

Views: 1323

Answers (2)

Michael Bußler
Michael Bußler

Reputation: 61

I've had the same issue. It can be avoided by applying the grabGesture to the viewport of the QScrollArea, instead of the whole widget:

QScroller::grabGesture(mArea->viewport(), QScroller::LeftMouseButtonGesture) ;

Upvotes: 6

Mike Shaw
Mike Shaw

Reputation: 393

I got a solution. I redefined the enterEvent and leaveEvent of QScrollBar, dis-activate and activate the QScroller inside with QScroller::ungrabGesture() QScroller::grabGesture(). It works fine now. Besides, a event filter can also do the job.

Upvotes: 0

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