/*
* ExtMapTypeControl Class v1.2 
*  Copyright (c) 2007, Google 
*  Author: Pamela Fox, others
* 
* 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.
*
* This class lets you add a control to the map which mimics GMapTypeControl
*  and allows for the addition of a traffic button/traffic key.
*/

/*
 * Constructor for ExtMapTypeControl, which uses an option hash
 * to decide what elements to put in the control.
 * @param {opt_opts} Named optional arguments:
 *   opt_opts.showTraffic {Boolean} Controls whether traffic button is shown
 *   opt_opts.showTrafficKey {Boolean} Controls whether traffic key is shown
 */
function ExtMapTypeControl(opt_opts) {
  this.options = opt_opts || {};
}


ExtMapTypeControl.prototype = new GControl();

/**
 * Is called by GMap2's addOverlay method. Creates the button 
 *  and appends to the map div.
 * @param {GMap2} map The map that has had this ExtMapTypeControl added to it.
 * @return {DOM Object} Div that holds the control
 */ 
ExtMapTypeControl.prototype.initialize = function(map) {
  var container = document.createElement("div");
  var me = this;

  var mapTypes = map.getMapTypes();
  var mapTypeDivs = me.addMapTypeButtons_(map);

  GEvent.addListener(map, "addmaptype", function() {
    var newMapTypes = map.getMapTypes();
    var newMapType = newMapTypes.pop();
    var newMapTypeDiv = me.createButton_(newMapType.getName());
    mapTypes.push(newMapType);
    mapTypeDivs.push(newMapTypeDiv);
    me.resetButtonEvents_(map, mapTypeDivs);
    container.appendChild(newMapTypeDiv);
  });
  GEvent.addListener(map, "removemaptype", function() {
    for (var i = 0; i < mapTypeDivs.length; i++) {
      GEvent.clearListeners(mapTypeDivs[i], "click");
      container.removeChild(mapTypeDivs[i]);
    }
    mapTypeDivs = me.addMapTypeButtons_(map);
    me.resetButtonEvents_(map, mapTypeDivs);
    for (var i = 0; i < mapTypeDivs.length; i++ ) {
      container.appendChild(mapTypeDivs[i]);
    }
  });
  }