116 lines
4.8 KiB
Java
116 lines
4.8 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.KeyDetector;
|
|
import com.android.inputmethod.keyboard.PointerTracker;
|
|
import com.android.inputmethod.latin.common.CoordinateUtils;
|
|
|
|
public final class NonDistinctMultitouchHelper {
|
|
private static final String TAG = NonDistinctMultitouchHelper.class.getSimpleName();
|
|
|
|
private static final int MAIN_POINTER_TRACKER_ID = 0;
|
|
private int mOldPointerCount = 1;
|
|
private Key mOldKey;
|
|
private int[] mLastCoords = CoordinateUtils.newInstance();
|
|
|
|
public void processMotionEvent(final MotionEvent me, final KeyDetector keyDetector) {
|
|
final int pointerCount = me.getPointerCount();
|
|
final int oldPointerCount = mOldPointerCount;
|
|
mOldPointerCount = pointerCount;
|
|
// Ignore continuous multi-touch events because we can't trust the coordinates
|
|
// in multi-touch events.
|
|
if (pointerCount > 1 && oldPointerCount > 1) {
|
|
return;
|
|
}
|
|
|
|
// Use only main pointer tracker.
|
|
final PointerTracker mainTracker = PointerTracker.getPointerTracker(
|
|
MAIN_POINTER_TRACKER_ID);
|
|
final int action = me.getActionMasked();
|
|
final int index = me.getActionIndex();
|
|
final long eventTime = me.getEventTime();
|
|
final long downTime = me.getDownTime();
|
|
|
|
// In single-touch.
|
|
if (oldPointerCount == 1 && pointerCount == 1) {
|
|
if (me.getPointerId(index) == mainTracker.mPointerId) {
|
|
mainTracker.processMotionEvent(me, keyDetector);
|
|
return;
|
|
}
|
|
// Inject a copied event.
|
|
injectMotionEvent(action, me.getX(index), me.getY(index), downTime, eventTime,
|
|
mainTracker, keyDetector);
|
|
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 coordinates of
|
|
// this multi-touch event.
|
|
mainTracker.getLastCoordinates(mLastCoords);
|
|
final int x = CoordinateUtils.x(mLastCoords);
|
|
final int y = CoordinateUtils.y(mLastCoords);
|
|
mOldKey = mainTracker.getKeyOn(x, y);
|
|
// Inject an artifact up event for the old key.
|
|
injectMotionEvent(MotionEvent.ACTION_UP, x, y, downTime, eventTime,
|
|
mainTracker, keyDetector);
|
|
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 int x = (int)me.getX(index);
|
|
final int y = (int)me.getY(index);
|
|
final Key newKey = mainTracker.getKeyOn(x, y);
|
|
if (mOldKey != newKey) {
|
|
// Inject an artifact down event for the new key.
|
|
// An artifact up event for the new key will usually be injected as a single-touch.
|
|
injectMotionEvent(MotionEvent.ACTION_DOWN, x, y, downTime, eventTime,
|
|
mainTracker, keyDetector);
|
|
if (action == MotionEvent.ACTION_UP) {
|
|
// Inject an artifact up event for the new key also.
|
|
injectMotionEvent(MotionEvent.ACTION_UP, x, y, downTime, eventTime,
|
|
mainTracker, keyDetector);
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
Log.w(TAG, "Unknown touch panel behavior: pointer count is "
|
|
+ pointerCount + " (previously " + oldPointerCount + ")");
|
|
}
|
|
|
|
private static void injectMotionEvent(final int action, final float x, final float y,
|
|
final long downTime, final long eventTime, final PointerTracker tracker,
|
|
final KeyDetector keyDetector) {
|
|
final MotionEvent me = MotionEvent.obtain(
|
|
downTime, eventTime, action, x, y, 0 /* metaState */);
|
|
try {
|
|
tracker.processMotionEvent(me, keyDetector);
|
|
} finally {
|
|
me.recycle();
|
|
}
|
|
}
|
|
}
|