Clean-up and refactor of the Android input implementation

[m4gr3d]

The first commit cleans up and refactors the Android input implementation:

• All input logic is delegated to the GodotInputHandler.java class which is now responsible for setting up and configuring the gesture handler logic
• The mouse & touch input logic has been refactored to rely primarily on the gesture handler
• The gesture handler logic was updated to include support for long press, multi-finger panning and scaling gestures. These gestures are disabled by default to mirror the current behavior
• The native input implementation was cleaned up to consolidate the logic in a few methods: process_touch_event for touch, process_mouse_event for mouse & stylus, and process_magnify and process_pan for scaling and panning gestures.

In the process, the PR addresses several existing Android input bugs:
Fixes #8151, fixes #46100, fixes #46101

Supersedes #59760, #54225

The second commit enables the long press, multi-finger panning and scaling gestures for the Godot Android Editor and fixes an input related bug that uses to cause a crash when clicking on the play button from the editor window.

Addresses some of the issues reported in godotengine/godot-proposals#3931

godot_android_editor_multi_touch_pixel5.mp4

3.x version

[thebestnom]

Really clean overall, love it!

[madmiraal]

This should be backed up by a proposal, because it directly conflicts with the approach suggested in godotengine/godot-proposals#4340.

[akien-mga]

Thanks!

[Chikiak]

I'm new to github, how can I use this?

[Calinou]

I'm new to github, how can I use this?

You could compile the Android editor from source, but it's not trivial and not well-documented right now. If you don't feel like compiling from source, wait for 3.6beta1 to be released.

[ygingras]

This is really interesting! Has it made it into 4-beta10? I can't seem to produce any of those gesture with my Android builds.

[m4gr3d]

This is really interesting! Has it made it into 4-beta10? I can't seem to produce any of those gesture with my Android builds.

@ygingras The logic to enable the gestures is not yet exposed to gdscript in order to allow the functionality to stabilize (since it was a fairly large rewrite to the Android input logic).

At the moment enabling them requires rebuilding the engine (see here for reference).

Once the logic is stabilized, we'll make it configurable through gdscript.

[ygingras]

Got it! Is there an issue or another source of info that I can follow to know when this is ready for consumption in GDScript? I might try the engine rebuild if this is scheduled passed 4.1, but otherwise, I will probably wait patiently.

[m4gr3d]

Got it! Is there an issue or another source of info that I can follow to know when this is ready for consumption in GDScript? I might try the engine rebuild if this is scheduled passed 4.1, but otherwise, I will probably wait patiently.

@ygingras The following project settings were added in Godot 4.2 beta to enable gestures on Android:

• input_devices/pointing/android/enable_long_press_as_right_click
• input_devices/pointing/android/enable_pan_and_scale_gestures

[ygingras]

Great! I can't wait to give those a try.