Swipe on trackpad to switch tabs

[Nerixyz]

Most browsers have trackpad gestures to go back and forth in history (sideways scroll, see video). In chatterino this could be used to quickly switch tabs.

firefox_PpbZgkgLzZ.webm

[pajlada]

Could you check if it's possible to catch this as a key event?
I'd really like this in the custom hotkey functionality rather than something new

[Nerixyz]

There's no key event on a swipe. QSwipeGesture seems to provide information about swiping. It's dispatched through a QGestureEvent, see Gestures Overview.

[Nerixyz]

Hmm, from my small testing, this only works on touchscreens but not on touchpads. It seems that QT doesn't really handle it or if any it's handled different for each platform.

[kornes]

qt6 adds new QNativeGestureEvent events which might help: Swipe and Pan, docs mention touchpad briefly https://doc.qt.io/qt-6.2/qnativegestureevent.html

[Nerixyz]

It's already in Qt5, but I'm not sure if that would work. It seems to be mainly for macOS:

The QNativeGestureEvent used to be only available on OS X; it's not really an API that's meant for wide consumption.

Source

[kornes]

yea, saw some qt tracker comments mentioning lacking cross implementations too,
but still worth to at least test QNativeGestureEvent, might aid your own win32 gestures handling and make macOS support easier

[Nerixyz]

I finally found out how these events are captured.

Both Firefox and Chrome use the DirectManipulation API on Windows.

I tried implementing it on this branch, but I couldn't get it to play nicely with the scrollbar (either the scrollbar doesn't work or DirectManipulation doesn't fire events anymore). If anyone knows how to fix this, feel free to reach out.

As a reference, the Firefox implementation can be found here.