content: /*
   * Copyright 2016-2018 devemux86
   *
   * This program is free software: you can redistribute it and/or modify it under the
   * terms of the GNU Lesser General Public License as published by the Free Software
   * Foundation, either version 3 of the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful, but WITHOUT ANY
   * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public License along with
   * this program. If not, see <http://www.gnu.org/licenses/>.
   */
  package org.oscim.scalebar;
  
  import org.oscim.core.MapPosition;
  import org.oscim.event.Event;
  import org.oscim.layers.Layer;
  import org.oscim.map.Map;
  import org.oscim.renderer.BitmapRenderer;
  
  public class MapScaleBarLayer extends Layer implements Map.UpdateListener {
      private final MapScaleBar mapScaleBar;
      private final BitmapRenderer bitmapRenderer;
  
      public MapScaleBarLayer(Map map, MapScaleBar mapScaleBar) {
          super(map);
          this.mapScaleBar = mapScaleBar;
  
          mRenderer = bitmapRenderer = new MapScaleBarRenderer();
          bitmapRenderer.setBitmap(mapScaleBar.mapScaleBitmap, mapScaleBar.mapScaleBitmap.getWidth(), mapScaleBar.mapScaleBitmap.getHeight());
      }
  
      @Override
      public BitmapRenderer getRenderer() {
          return bitmapRenderer;
      }
  
      @Override
      public void onMapEvent(Event e, MapPosition mapPosition) {
          if (e == Map.UPDATE_EVENT)
              return;
  
          if (mapScaleBar.mapScaleBitmap == null)
              return;
  
          if (!mapScaleBar.isVisible())
              return;
  
          if (mMap.getHeight() == 0)
              return;
  
          if (!mapScaleBar.isRedrawNecessary())
              return;
  
          synchronized (mapScaleBar.mapScaleBitmap) {
              mapScaleBar.drawScaleBar();
          }
  
          bitmapRenderer.updateBitmap();
  
          mapScaleBar.redrawNeeded = false;
      }
  }
  