content: /*
   * Copyright 2013 Hannes Janetzek
   * Copyright 2017 Longri
   * Copyright 2017 devemux86
   *
   * This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
   *
   * 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.layers;
  
  import org.oscim.map.Map;
  import org.oscim.renderer.LayerRenderer;
  
  public abstract class Layer {
  
      public Layer(Map map) {
          mMap = map;
      }
  
      private boolean mEnabled = true;
      private EnableHandler mHandler;
      protected final Map mMap;
  
      protected LayerRenderer mRenderer;
  
      public LayerRenderer getRenderer() {
          return mRenderer;
      }
  
      /**
       * Enabled layers will be considered for rendering and receive onMapUpdate()
       * calls when they implement MapUpdateListener.
       *
       * @param enabled
       */
      public void setEnabled(boolean enabled) {
          boolean changed = mEnabled != enabled;
          mEnabled = enabled;
          if (mHandler != null && changed)
              mHandler.changed(enabled);
      }
  
      public boolean isEnabled() {
          return mEnabled;
      }
  
      public void setEnableHandler(EnableHandler handler) {
          mHandler = handler;
      }
  
      /**
       * Override to perform clean up of resources before shutdown.
       */
      public void onDetach() {
      }
  
      public Map map() {
          return mMap;
      }
  
      public interface EnableHandler {
          void changed(boolean enabled);
      }
  }
  