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List:       kde-frameworks-devel
Subject:    Re: KGuiAddons and QGestures like tap/click-and-hold to open context menu?
From:       René_J.V. Bertin <rjvbertin () gmail ! com>
Date:       2017-03-12 19:11:08
Message-ID: 2185296.tvcEaq6VvI () portia ! local
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On Sunday March 12 2017 17:52:25 David Faure wrote:

> > And if you make it an optional feature in the QPA it (almost?) becomes
> > something that users might want to control the way they could control
> > certain things via Q4's qtconfig .
> 
> Or systemsettings, sure.
> 
> > Maybe the QPA platform integration plugin could be a good place, I'll tinker
> > with that in my osx-integration plugin.

Doh, we forgot something ...

You need to "subscribe the widget to a given gesture with specific flags" using \
QWidget::grabGesture(). I don't see any documented way to enable gestures of a given \
type for all current and future widgets or QGraphicsObjects.

That probably makes it impossible to implement this kind of feature the way you were \
implying, outside of Qt itself. All I see is an implementation in a library, where \
you create a single instance (per application) of a dedicated class that contains the \
eventFilter() function. And a static method that takes a QWidget, subscribes it to \
the gesture and installs the event filter.

R.


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