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package com.mdobbins.implementation.framework; /*from w ww.ja v a 2 s .co m*/ import java.util.ArrayList; import java.util.List; import android.view.MotionEvent; import android.view.View; import com.mdobbins.framework.Pool; import com.mdobbins.framework.Input.TouchEvent; import com.mdobbins.framework.Pool.PoolObjectFactory; public class MultiTouchHandler implements TouchHandler { private static final int MAX_TOUCHPOINTS = 10; boolean[] isTouched = new boolean[MAX_TOUCHPOINTS]; int[] touchX = new int[MAX_TOUCHPOINTS]; int[] touchY = new int[MAX_TOUCHPOINTS]; int[] id = new int[MAX_TOUCHPOINTS]; Pool<TouchEvent> touchEventPool; List<TouchEvent> touchEvents = new ArrayList<TouchEvent>(); List<TouchEvent> touchEventsBuffer = new ArrayList<TouchEvent>(); float scaleX; float scaleY; public MultiTouchHandler(View view, float scaleX, float scaleY) { PoolObjectFactory<TouchEvent> factory = new PoolObjectFactory<TouchEvent>() { @Override public TouchEvent createObject() { return new TouchEvent(); } }; touchEventPool = new Pool<TouchEvent>(factory, 100); view.setOnTouchListener(this); this.scaleX = scaleX; this.scaleY = scaleY; } @Override public boolean onTouch(View v, MotionEvent event) { synchronized (this) { int action = event.getAction() & MotionEvent.ACTION_MASK; int pointerIndex = (event.getAction() & MotionEvent.ACTION_POINTER_ID_MASK) >> MotionEvent.ACTION_POINTER_ID_SHIFT; int pointerCount = event.getPointerCount(); TouchEvent touchEvent; for (int i = 0; i < MAX_TOUCHPOINTS; i++) { if (i >= pointerCount) { isTouched[i] = false; id[i] = -1; continue; } int pointerId = event.getPointerId(i); if (event.getAction() != MotionEvent.ACTION_MOVE && i != pointerIndex) { // if it's an up/down/cancel/out event, mask the id to see if we should process it for this touch // point continue; } switch (action) { case MotionEvent.ACTION_DOWN: case MotionEvent.ACTION_POINTER_DOWN: touchEvent = touchEventPool.newObject(); touchEvent.type = TouchEvent.TOUCH_DOWN; touchEvent.pointer = pointerId; touchEvent.x = touchX[i] = (int) (event.getX(i) * scaleX); touchEvent.y = touchY[i] = (int) (event.getY(i) * scaleY); isTouched[i] = true; id[i] = pointerId; touchEventsBuffer.add(touchEvent); break; case MotionEvent.ACTION_UP: case MotionEvent.ACTION_POINTER_UP: case MotionEvent.ACTION_CANCEL: touchEvent = touchEventPool.newObject(); touchEvent.type = TouchEvent.TOUCH_UP; touchEvent.pointer = pointerId; touchEvent.x = touchX[i] = (int) (event.getX(i) * scaleX); touchEvent.y = touchY[i] = (int) (event.getY(i) * scaleY); isTouched[i] = false; id[i] = -1; touchEventsBuffer.add(touchEvent); break; case MotionEvent.ACTION_MOVE: touchEvent = touchEventPool.newObject(); touchEvent.type = TouchEvent.TOUCH_DRAGGED; touchEvent.pointer = pointerId; touchEvent.x = touchX[i] = (int) (event.getX(i) * scaleX); touchEvent.y = touchY[i] = (int) (event.getY(i) * scaleY); isTouched[i] = true; id[i] = pointerId; touchEventsBuffer.add(touchEvent); break; } } return true; } } @Override public boolean isTouchDown(int pointer) { synchronized (this) { int index = getIndex(pointer); if (index < 0 || index >= MAX_TOUCHPOINTS) return false; else return isTouched[index]; } } @Override public int getTouchX(int pointer) { synchronized (this) { int index = getIndex(pointer); if (index < 0 || index >= MAX_TOUCHPOINTS) return 0; else return touchX[index]; } } @Override public int getTouchY(int pointer) { synchronized (this) { int index = getIndex(pointer); if (index < 0 || index >= MAX_TOUCHPOINTS) return 0; else return touchY[index]; } } @Override public List<TouchEvent> getTouchEvents() { synchronized (this) { int len = touchEvents.size(); for (int i = 0; i < len; i++) touchEventPool.free(touchEvents.get(i)); touchEvents.clear(); touchEvents.addAll(touchEventsBuffer); touchEventsBuffer.clear(); return touchEvents; } } // returns the index for a given pointerId or -1 if no index. private int getIndex(int pointerId) { for (int i = 0; i < MAX_TOUCHPOINTS; i++) { if (id[i] == pointerId) { return i; } } return -1; } }