Android Open Source - Mapyst Map View Limiter

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License

The source code is released under:

Apache License

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Java Source Code

/*
 * Copyright (C) 2013 Mapyst/* w w w  .j  a  va  2  s  .com*/
 *
 * 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.mapyst.android.ui.map;

import android.graphics.Rect;

import com.google.android.maps.MapView;
import com.mapyst.android.ui.RouteMapOverlay;

public class MapViewLimiter {

  public static boolean tooFarOut(MapView map, Rect targetBounds) {
    Rect currBounds = MapUtils.getCurrBounds(map);
    Rect newTargetBounds = getNewTargetBounds(targetBounds, 4);
    return currBounds.width() > newTargetBounds.width() * .75;
  }

  public static Rect getNewTargetBounds(Rect targetBounds, float scale) {
    Rect newTargetBounds = new Rect(targetBounds);
    newTargetBounds.inset(-newTargetBounds.height() * 4,
        -newTargetBounds.height() * 4);
    return newTargetBounds;
  }

  public static boolean outOfBounds(MapView map, Rect targetBounds) {
    return outOfBounds(map, targetBounds, 4);
  }

  public static boolean outOfBounds(MapView map, Rect targetBounds,
      float scale) {
    Rect currBounds = MapUtils.getCurrBounds(map);
    Rect newTargetBounds = getNewTargetBounds(targetBounds, scale);
    if (RouteMapOverlay.debugRects.size() == 0)
      RouteMapOverlay.debugRects.add(newTargetBounds);
    boolean contains = newTargetBounds.contains(currBounds);
    return !contains;
  }
}

Java Source Code List