| /* |
| * 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; |
| |
| public final 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 |
| public Key detectHitKey(int x, int y) { |
| final int touchX = getTouchX(x); |
| final int touchY = getTouchY(y); |
| |
| Key nearestKey = null; |
| int nearestDist = (y < 0) ? mSlideAllowanceSquareTop : mSlideAllowanceSquare; |
| for (final Key key : getKeyboard().mKeys) { |
| final int dist = key.squaredDistanceToEdge(touchX, touchY); |
| if (dist < nearestDist) { |
| nearestKey = key; |
| nearestDist = dist; |
| } |
| } |
| return nearestKey; |
| } |
| } |