net/systemeD/potlatch2/Yahoo.as

   1 package net.systemeD.potlatch2 {
   2
   3         import flash.display.*;
   4         import net.systemeD.halcyon.Map;
   5         import net.systemeD.halcyon.MapEvent;
   6         import com.yahoo.maps.api.YahooMap;
   7         import com.yahoo.maps.api.YahooMapEvent;
   8         import com.yahoo.maps.api.core.location.LatLon;
   9
  10     public class Yahoo extends YahooMap {
  11
  12                 private var map:Map;
  13                 private static const token:String="f0a.sejV34HnhgIbNSmVHmndXFpijgGeun0fSIMG9428hW_ifF3pYKwbV6r9iaXojl1lU_dakekR";
  14                 private static const MAXZOOM:int=17;
  15
  16                 private var _lat:Number;
  17                 private var _lon:Number;
  18                 private var _scale:Number;
  19                 private var offset_lat:Number=0;
  20                 private var offset_lon:Number=0;
  21                 private var inited:Boolean;
  22
  23                 public function Yahoo(w:Number, h:Number, map:Map) {
  24                         super();
  25                         this.init(token, w, h);
  26                         this.mapType="satellite";
  27                         this.alpha=0.5;
  28                         this.map=map;
  29                         this.inited=false;
  30                         this.addEventListener(YahooMapEvent.MAP_INITIALIZE, initHandler);
  31                 }
  32
  33                 public function show():void {
  34                         this.visible=true;
  35                         if (inited) { moveto(map.centre_lat, map.centre_lon, map.scale); }
  36
  37                         map.addEventListener(MapEvent.MOVE, moveHandler);
  38                         map.addEventListener(MapEvent.RESIZE, resizeHandler);
  39                         map.addEventListener(MapEvent.NUDGE_BACKGROUND, nudgeHandler);
  40                 }
  41
  42                 public function hide():void {
  43                         this.visible=false;
  44
  45                         map.removeEventListener(MapEvent.MOVE, moveHandler);
  46                         map.removeEventListener(MapEvent.RESIZE, resizeHandler);
  47                         map.removeEventListener(MapEvent.NUDGE_BACKGROUND, nudgeHandler);
  48                 }
  49
  50                 private function initHandler(event:YahooMapEvent):void {
  51                         inited=true;
  52                         if (map.centre_lat) { moveto(map.centre_lat, map.centre_lon, map.scale); }
  53                         this.removeEventListener(YahooMapEvent.MAP_INITIALIZE, initHandler);
  54                 }
  55
  56                 private function moveHandler(event:MapEvent):void {
  57                         if (!inited) { return; }
  58                         moveto(event.params.lat, event.params.lon, event.params.scale);
  59                 }
  60
  61                 private function moveto(lat:Number,lon:Number,scale:uint):void {
  62                         if (scale>MAXZOOM) { this.visible=false; return; }
  63                         _lat=lat; _lon=lon; _scale=scale;
  64
  65                         this.visible=true;
  66                         this.zoomLevel=18-scale;
  67                         this.centerLatLon=new LatLon(lat+offset_lat, lon+offset_lon);
  68                 }
  69
  70                 private function resizeHandler(event:MapEvent):void {
  71                         this.setSize(event.params.width, event.params.height);
  72                 }
  73
  74                 private function nudgeHandler(event:MapEvent):void {
  75                         var cx:Number=map.lon2coord(map.centre_lon);
  76                         var cy:Number=map.lat2coord(map.centre_lat);
  77                         offset_lon+=map.coord2lon(cx-event.params.x)-map.centre_lon;
  78                         offset_lat+=map.coord2lat(cy-event.params.y)-map.centre_lat;
  79                         moveto(_lat,_lon,_scale);
  80                 }
  81         }
  82 }