content: /*
   * 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.amnesica.kryptey.inputmethod.keyboard;
  
  public final class MoreKeysDetector extends KeyDetector {
    private final int mSlideAllowanceSquare;
    private final int mSlideAllowanceSquareTop;
  
    public MoreKeysDetector(float slideAllowance) {
      super();
      mSlideAllowanceSquare = (int) (slideAllowance * slideAllowance);
      // Top slide allowance is slightly longer (sqrt(2) times) than other edges.
      mSlideAllowanceSquareTop = mSlideAllowanceSquare * 2;
    }
  
    @Override
    public boolean alwaysAllowsKeySelectionByDraggingFinger() {
      return true;
    }
  
    @Override
    public Key detectHitKey(final int x, final int y) {
      final Keyboard keyboard = getKeyboard();
      if (keyboard == null) {
        return null;
      }
      final int touchX = getTouchX(x);
      final int touchY = getTouchY(y);
  
      Key nearestKey = null;
      int nearestDist = (y < 0) ? mSlideAllowanceSquareTop : mSlideAllowanceSquare;
      for (final Key key : keyboard.getSortedKeys()) {
        final int dist = key.squaredDistanceToHitboxEdge(touchX, touchY);
        if (dist < nearestDist) {
          nearestKey = key;
          nearestDist = dist;
        }
      }
      return nearestKey;
    }
  }
  