TouchEvent only will not work properly with two mobile fingers

Hello

I'm not quite sure what the problem. My code running, sometimes, this mobile finger 1 causes actions that could only be triggered by moving the finger 2. When mobile fingers 2, then, further actions are triggered, which could be invoked by the 2 finger, so it seems to be a bit strange. It's also a little messy to debug. Anyone ideas? Is this a case for the Issue Tracker?


    private int lastX1;
    private int lastY1;
    private int lastX2;
    private int lastY2;
    private int lastAngle;
    private boolean fingerOne = false;
    private boolean fingerTwo = false;

    boolean touchEvent(TouchEvent message) {

        switch(message.getEvent()) {

        case TouchEvent.DOWN:
            if(message.getX(1) > -1) {
                lastX1 = message.getX(1);
                lastY1 = message.getY(1);
                fingerOne = true;
            }
            if(message.getX(2) > -1) {
                lastX2 = message.getX(2);
                lastY2 = message.getY(2);
                lastAngle = Fixed32.atand2(lastX1 - lastX2, lastY1 - lastY2);
                fingerTwo = true;
            }
            return false;

        case TouchEvent.MOVE:
            if(message.getX(1) > -1 &&
                    (lastX1 != message.getX(1) || lastY1 != message.getY(1))) {
                //do some action here
                lastX1 = message.getX(1);
                lastY1 = message.getY(1);
                if(fingerTwo) {
                    lastAngle = Fixed32.atand2(lastX1 - lastX2, lastY1 - lastY2);
                }
            }
            if(message.getX(2) > -1 &&
                    (lastX2 != message.getX(2) || lastY2 != message.getY(2))) {
                lastX2 = message.getX(2);
                lastY2 = message.getY(2);
                final int lastAngle = this.lastAngle;
                this.lastAngle = Fixed32.atand2(lastX1 - lastX2, lastY1 - lastY2);
                final int rotation = Fixed32.toRoundedInt(this.lastAngle - lastAngle);
                //do other action with rotation here
            }
            return false;

        case TouchEvent.UP:
            if(message.getX(1) > -1)fingerOne = false;
            if(message.getX(2) > -1)fingerTwo = false;
        }

        return false;
    }

I'm not sure what the problem is that you meet, but there is a problem with the TouchEvent return incorrect values if the two points of contact Cross (IE if you touch the left and right of the screen and then move your fingers together, once they cross the X 1 value will now follow the finger instead of finger 1 2).

Tags: BlackBerry Developers

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