[Feature request] Simulate programmatically a touch in FTouchManager

[jpsarda]

The same way you simulate touch events with mouse events, would be cool to be able to fake a touch. I've built a stress machine (a loop randomly faking a click on the screen every 4 frames) on my current project, and it revealed a lot of problems that would have taken a long time to reproduce and fix with user feedback.

I know you've planned to change the FTouchManager so I wont submit a pull request, but let me know if you want to see it.

[MattRix]

Sure yeah, I'd like to see it. The FTouchManager is different now, but it should be even easier to integrate into it, I think.

[jpsarda]

Here it is, it allows to fake single touch (not multi touch).

Added these methods in FTouchManager :

    protected FTouch _lastFakeTouch;    
    protected bool _fakeTouchToProcess=false;
    public void FakeTouchDown(Vector2 pos) {
        FTouch touch=new FTouch();
        touch.fingerId = 100;
        touch.tapCount = 1;
        touch.deltaTime = Time.deltaTime;
        touch.deltaPosition = new Vector2(0,0);
        touch.position = pos;
        touch.phase = TouchPhase.Began;

        _lastFakeTouch=touch;
        _fakeTouchToProcess=true;
    }
    public void FakeTouchUp() {
        _lastFakeTouch.phase = TouchPhase.Ended;
        _fakeTouchToProcess=true;
    }
    public void FakeTouchMove(Vector2 pos) {
        _lastFakeTouch.phase = TouchPhase.Moved;
        _lastFakeTouch.deltaPosition = pos-_lastFakeTouch.position;
        _lastFakeTouch.position=pos;
        _fakeTouchToProcess=true;
    }

A few changes in HandleUpdate :

        int touchCount = Input.touchCount;
        int offset = 0;

        if(wasMouseTouch) touchCount++;
        if (_fakeTouchToProcess) touchCount++;

        FTouch[] touches = new FTouch[touchCount];

        if(wasMouseTouch) 
        {
            touches[offset] = mouseTouch;
            offset++;
        }

        if (_fakeTouchToProcess)
        {
            touches[offset] = _lastFakeTouch;
            offset++;
            _fakeTouchToProcess=false;
        }

Then a stress test engine example would be something like this :

    protected void HandleUpdate ()
    {
        frameCount++;
        if (frameCount%4==0) {
            Futile.touchManager.FakeTouchDown(new Vector2(RXRandom.Range(-Futile.screen.halfWidth,Futile.screen.halfWidth),RXRandom.Range(-Futile.screen.halfHeight,Futile.screen.halfHeight)));
        } else if (frameCount%4==2) {
            Futile.touchManager.FakeTouchUp();
        }
    }