64 lines
2.1 KiB
Java
64 lines
2.1 KiB
Java
|
/*
|
||
|
|
* Copyright (C) 2011 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;
|
||
|
|
|
||
|
|
import java.util.List;
|
||
|
|
|
||
|
|
public class MoreKeysDetector extends KeyDetector {
|
||
|
|
private final int mSlideAllowanceSquare;
|
||
|
|
private final int mSlideAllowanceSquareTop;
|
||
|
|
|
||
|
|
public MoreKeysDetector(float slideAllowance) {
|
||
|
|
super(/* keyHysteresisDistance */0);
|
||
|
|
mSlideAllowanceSquare = (int)(slideAllowance * slideAllowance);
|
||
|
|
// Top slide allowance is slightly longer (sqrt(2) times) than other edges.
|
||
|
|
mSlideAllowanceSquareTop = mSlideAllowanceSquare * 2;
|
||
|
|
}
|
||
|
|
|
||
|
|
@Override
|
||
|
|
public boolean alwaysAllowsSlidingInput() {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
@Override
|
||
|
|
protected int getMaxNearbyKeys() {
|
||
|
|
// No nearby key will be returned.
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
@Override
|
||
|
|
public int getKeyIndexAndNearbyCodes(int x, int y, final int[] allCodes) {
|
||
|
|
final List<Key> keys = getKeyboard().mKeys;
|
||
|
|
final int touchX = getTouchX(x);
|
||
|
|
final int touchY = getTouchY(y);
|
||
|
|
|
||
|
|
int nearestIndex = NOT_A_KEY;
|
||
|
|
int nearestDist = (y < 0) ? mSlideAllowanceSquareTop : mSlideAllowanceSquare;
|
||
|
|
final int keyCount = keys.size();
|
||
|
|
for (int index = 0; index < keyCount; index++) {
|
||
|
|
final int dist = keys.get(index).squaredDistanceToEdge(touchX, touchY);
|
||
|
|
if (dist < nearestDist) {
|
||
|
|
nearestIndex = index;
|
||
|
|
nearestDist = dist;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (allCodes != null && nearestIndex != NOT_A_KEY)
|
||
|
|
allCodes[0] = keys.get(nearestIndex).mCode;
|
||
|
|
return nearestIndex;
|
||
|
|
}
|
||
|
|
}
|