MyMapView.java :  » RSS » mobiledroidgis » mmenning » mobilegis » map » Android Open Source

/*
 * Copyright (C) 2010 by Mathias Menninghaus (mmenning (at) uos (dot) de)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package mmenning.mobilegis.map;

import java.util.List;

import mmenning.mobilegis.R;

import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;

import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;

/**
 * Extended GoogleMaps MapView to enable and disable the GoogleMap Layer but to
 * keep the Projection, zoom- and walk controls. If the GoogleMap Layer is
 * disabled it will display a one-colored background.
 * 
 * @author Mathias Mennighaus
 * @version 23.10.2009
 * 
 */
public class MyMapView extends MapView {

  public MyMapView(Context context, AttributeSet attrs) {
    super(context, attrs);
    mapBackground = this.getResources().getColor(R.color.map_background);
  }

  private int mapBackground;

  @Override
  public void draw(Canvas canvas) {

    if (this.googleMapsVisible) {
      super.draw(canvas);
    } else {
      canvas.drawColor(mapBackground);

      List<Overlay> overlays = this.getOverlays();

      for (Overlay o : overlays) {
        o.draw(canvas, this, false, System.currentTimeMillis());
      }
    }
  }

  private boolean googleMapsVisible;

  /**
   * Enable or Disable the GoogleMaps Layer.
   * 
   * @param visible
   *            whether GooglMaps should be displayed or not.
   */
  public void setGoogleMapsVisibility(boolean visible) {
    this.googleMapsVisible = visible;
  }

}