Touchpad gesture support (e.g. for zooming via touchpad pinch gestures)

[Povilas Kanapickas]

Hello,

The touchpad zomming support for Libreoffice Writer, Calc, Draw and Math
main documents has been implemented. The code is in
https://gerrit.libreoffice.org/c/core/+/143759/1 and other 8 changes in
the chain.

Cheers,
Povilas

On 2022-08-25 13:15, Povilas Kanapickas wrote:
> Hello,
> 
> I would like to implement support for touchpad gesture handling to
> LibreOffice. This is useful e.g. for zooming views using two-finger
> pinch touchpad gesture or rotating objects using two-finger rotate gesture.
> 
> I have implemented this functionality in GIMP and would like to do the
> same for LibreOffice. In LibreOffice case the implementation will be
> more complex, as there are more backends than just GTK, but this will
> just require more work.
> 
> There is a proof of concept implementation that wires touchpad gestures
> on GTK to the ViewShell widget. As a result it's possible to use
> touchpad pinch gesture to zoom in-out the main slide in Impress.
> 
> https://gerrit.libreoffice.org/c/core/+/138791/1 (note that
> implementation is split across 5 changes in the chain).
> 
> Please let me know what do you think about this problem and the proof of
> concept solution.
> 
> I would like to eventually add touchpad gesture support to all UI
> elements of LibreOffice where that makes sense.
> 
> Cheers,
> Povilas
>