91 lines
3.7 KiB
Java
91 lines
3.7 KiB
Java
|
/*
|
||
|
|
* Copyright (C) 2013 The Android Open Source Project
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
package com.android.inputmethod.keyboard.internal;
|
||
|
|
|
||
|
|
import android.util.Log;
|
||
|
|
import android.view.MotionEvent;
|
||
|
|
|
||
|
|
import com.android.inputmethod.keyboard.Key;
|
||
|
|
import com.android.inputmethod.keyboard.PointerTracker;
|
||
|
|
import com.android.inputmethod.keyboard.PointerTracker.KeyEventHandler;
|
||
|
|
import com.android.inputmethod.latin.utils.CoordinateUtils;
|
||
|
|
|
||
|
|
public final class NonDistinctMultitouchHelper {
|
||
|
|
private static final String TAG = NonDistinctMultitouchHelper.class.getSimpleName();
|
||
|
|
|
||
|
|
private int mOldPointerCount = 1;
|
||
|
|
private Key mOldKey;
|
||
|
|
|
||
|
|
public void processMotionEvent(final MotionEvent me, final KeyEventHandler keyEventHandler) {
|
||
|
|
final int pointerCount = me.getPointerCount();
|
||
|
|
final int oldPointerCount = mOldPointerCount;
|
||
|
|
mOldPointerCount = pointerCount;
|
||
|
|
// Ignore continuous multitouch events because we can't trust the coordinates in mulitouch
|
||
|
|
// events.
|
||
|
|
if (pointerCount > 1 && oldPointerCount > 1) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
final int action = me.getActionMasked();
|
||
|
|
final int index = me.getActionIndex();
|
||
|
|
final long eventTime = me.getEventTime();
|
||
|
|
final int x = (int)me.getX(index);
|
||
|
|
final int y = (int)me.getY(index);
|
||
|
|
// Use only main (id=0) pointer tracker.
|
||
|
|
final PointerTracker mainTracker = PointerTracker.getPointerTracker(0, keyEventHandler);
|
||
|
|
|
||
|
|
// In single touch.
|
||
|
|
if (oldPointerCount == 1 && pointerCount == 1) {
|
||
|
|
mainTracker.processMotionEvent(action, x, y, eventTime, keyEventHandler);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Single-touch to multi-touch transition.
|
||
|
|
if (oldPointerCount == 1 && pointerCount == 2) {
|
||
|
|
// Send an up event for the last pointer, be cause we can't trust the corrdinates of
|
||
|
|
// this multitouch event.
|
||
|
|
final int[] lastCoords = CoordinateUtils.newInstance();
|
||
|
|
mainTracker.getLastCoordinates(lastCoords);
|
||
|
|
mOldKey = mainTracker.getKeyOn(
|
||
|
|
CoordinateUtils.x(lastCoords), CoordinateUtils.y(lastCoords));
|
||
|
|
// TODO: Stop calling PointerTracker.onUpEvent directly.
|
||
|
|
mainTracker.onUpEvent(
|
||
|
|
CoordinateUtils.x(lastCoords), CoordinateUtils.y(lastCoords), eventTime);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Multi-touch to single touch transition.
|
||
|
|
if (oldPointerCount == 2 && pointerCount == 1) {
|
||
|
|
// Send a down event for the latest pointer if the key is different from the
|
||
|
|
// previous key.
|
||
|
|
final Key newKey = mainTracker.getKeyOn(x, y);
|
||
|
|
if (mOldKey != newKey) {
|
||
|
|
// TODO: Stop calling PointerTracker.onDownEvent directly.
|
||
|
|
mainTracker.onDownEvent(x, y, eventTime, keyEventHandler);
|
||
|
|
if (action == MotionEvent.ACTION_UP) {
|
||
|
|
// TODO: Stop calling PointerTracker.onUpEvent directly.
|
||
|
|
mainTracker.onUpEvent(x, y, eventTime);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
Log.w(TAG, "Unknown touch panel behavior: pointer count is "
|
||
|
|
+ pointerCount + " (previously " + oldPointerCount + ")");
|
||
|
|
}
|
||
|
|
}
|