Gesture detection: high-level API for touch input

[sedyh]

Operating System

• [ ] Windows
• [ ] macOS
• [ ] Linux
• [ ] FreeBSD
• [ ] OpenBSD
• [X] Android
• [X] iOS
• [X] Nintendo Switch
• [ ] Xbox
• [X] Web Browsers

What feature would you like to be added?

At the moment, support for the touch is at a fairly low level. Because of this, most of the applications that come out under wasm almost always do not have touch support.

I suggest discussing the API for gesture detection based on the example we already have: https://github.com/hajimehoshi/ebiten/blob/main/examples/touch/main.go

It would probably be great to call it in the same format as we are currently checking the pressed keys. I'll try to make something like this later:

func IsTapping() (event Tap, ok bool) {}
func IsPanning() (event Pan, ok bool) {}
func IsPinching() (event Pinch, ok bool) {}
func IsSwiping() (event Swap, ok bool) {}

Why is this needed?

This will contribute to the support of the touch in a much larger number of games than now.