Add proper touch support (for Wayland only)

[leleat]

Add proper touch support (for Wayland only)

[cameronaw13]

From another project that I'm referencing (gjs-osk), it seems that they use Clutter's events and vfunctions to detect pointer, touch, and event pen events ( BUTTON_PRESS, MOTION, BUTTON_RELEASE, TOUCH_BEGIN, TOUCH_UPDATE, TOUCH_END ) For all 3 event types they use event.get_coords() to find the coordinates for their respective events. Not sure how to implement this within moveHandler.js yet as I have no experience with gjs but I am able to test it using a convertible laptop.

Update: I realized that this suggestion probably wouldn't work with the moveHandler since it deals more with Meta rather than Clutter for input. Maybe there's some way to work it out that eludes me at my current skill level. Would love to see someone help solve this issue as it would increase gnome's compatibility with touch devices.

[cameronaw13]

I've been looking around for others' solutions and found that Fly-Pie already created an implementation of what I proposed above. It seems that they use a background modal that captures Clutter input events which is then sent to the menu where some checks are performed before ultimately finding the input's coordinates.

I feel like something of this nature could be implemented within this project if it's able to mesh well with the moveHandler class and Meta.

[Leleat]

Thanks for the work, I'll look into the other projects. I've wanted to rework the 'moveHandler' at some point. I'll try to get the touch support into it then as well.