Example usage for android.view MotionEvent.PointerCoords MotionEvent.PointerCoords

Introduction

In this page you can find the example usage for android.view MotionEvent.PointerCoords MotionEvent.PointerCoords.

Prototype

MotionEvent.PointerCoords

Source Link

Usage

From source file:com.juick.android.ThreadFragment.java

@TargetApi(Build.VERSION_CODES.GINGERBREAD)
public boolean onTouch(View view, MotionEvent event) {
    if (parent.onListTouchEvent(view, event))
        return true;
    if (parent.isFinishing())
        return true;
    if (mScaleDetector != null) {
        try {//from w w w  . java2 s .c  o  m
            mScaleDetector.onTouchEvent(event);
        } catch (Exception e) {
            // shit happens there inside
        }
    }
    try {
        MotionEvent.PointerCoords pc = new MotionEvent.PointerCoords();
        event.getPointerCoords(0, pc);
        switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            if (navMenu != null && navMenu.getVisibility() == View.VISIBLE) {
                int[] listViewLocation = new int[2];
                int[] imageLocation = new int[2];
                getListView().getLocationOnScreen(listViewLocation);
                navMenu.getLocationOnScreen(imageLocation);
                imageLocation[0] += navMenu.initialTranslationX;
                float touchX = pc.x + listViewLocation[0] - imageLocation[0];
                float touchY = pc.y + listViewLocation[1] - imageLocation[1];
                System.out.println("TOUCH: ACTION_DOWN: x=" + pc.x + " y=" + pc.y);
                if (touchX > -20 && touchX < navMenu.getWidth() && touchY > 0
                        && touchY < navMenu.getHeight() * 1.5) { // extra Y pixels due to picture not balanced
                    touchOriginX = pc.x;
                    touchOriginY = pc.y;
                    System.out.println("TOUCH: OK TOUCH NAVMENU");
                    return true;
                }
            }
            break;
        case MotionEvent.ACTION_UP:
            if (!ignoreMove && !isNavigationMenuShown())
                resetMainMenuButton(false);
            if (touchOriginX > 0 || ignoreMove) {
                touchOriginX = -1;
                ignoreMove = false;
                return true;
            }
            break;
        case MotionEvent.ACTION_MOVE:
            if (ignoreMove || navMenu == null)
                return true;
            event.getPointerCoords(0, pc);
            double travelledDistance = Math
                    .sqrt(Math.pow(touchOriginX - pc.x, 2) + Math.pow(touchOriginY - pc.y, 2));
            boolean inZone = false;
            if (!isNavigationMenuShown()) {
                if (touchOriginX >= 0) {
                    // detect angle where finger moves
                    if (travelledDistance < 10) { // grace period
                        inZone = true;
                    } else {
                        float dx = Math.abs(touchOriginX - pc.x);
                        float dy = Math.abs(touchOriginY - pc.y);
                        if (dx > dy) {
                            // movement in 45 degree zone
                            if (touchOriginX > pc.x) {
                                // towards left
                                inZone = true;
                                double neededDistance = 1.5 / 2.54 * getResources().getDisplayMetrics().xdpi;
                                if (travelledDistance > neededDistance) {
                                    // moved 1.5 centimeters
                                    System.out.println("TOUCH: OPEN MENU");
                                    ignoreMove = true;
                                    openNavigationMenu(pc.x - touchOriginX + initNavMenuTranslationX);
                                    touchOriginX = -1;
                                }
                            }
                        } else {
                            System.out.println("TOUCH: LEAVING ZONE: dx=" + dx + " dy=" + dy);
                        }
                    }
                    if (inZone && !ignoreMove) {
                        TranslateAnimation immediate = new TranslateAnimation(Animation.ABSOLUTE,
                                pc.x - touchOriginX + initNavMenuTranslationX, Animation.ABSOLUTE,
                                pc.x - touchOriginX + initNavMenuTranslationX, Animation.ABSOLUTE, 0,
                                Animation.ABSOLUTE, 0);
                        immediate.setDuration(5);
                        immediate.setFillAfter(true);
                        immediate.setFillBefore(true);
                        immediate.setFillEnabled(true);
                        navMenu.startAnimation(immediate);
                    }
                }
                if (!inZone) {
                    resetMainMenuButton(false);
                    if (touchOriginX >= 0) {
                        System.out.println("TOUCH: ACTION_MOVE: x=" + pc.x + " y=" + pc.y);
                        System.out.println("TOUCH: LEFT ZONE");
                        touchOriginX = -1;
                    }
                }
                if (inZone) {
                    return true;
                }
                if (doOnClick != null || ignoreMove) {
                    return true;
                }
            }
            break;
        }
    } catch (NoClassDefFoundError err) {
        // so be it.
    }
    return false;
}

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