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                 private var enabled:Boolean;
  23
  24                 public function Yahoo(w:Number, h:Number, map:Map) {
  25                         super();
  26                         this.init(token, w, h);
  27                         this.mapType="satellite";
  28                         this.alpha=0.5;
  29                         this.map=map;
  30                         inited=false;
  31                         visible=enabled=false;
  32                         this.addEventListener(YahooMapEvent.MAP_INITIALIZE, initHandler);
  33                 }
  34
  35                 public function show():void {
  36                         visible=enabled=true;
  37                         if (inited) {
  38                                 moveto(map.centre_lat, map.centre_lon, map.scale);
  39                                 this.setSize(map.mapwidth,map.mapheight);
  40                         }
  41
  42                         map.addEventListener(MapEvent.MOVE, moveHandler);
  43                         map.addEventListener(MapEvent.RESIZE, resizeHandler);
  44                         map.addEventListener(MapEvent.NUDGE_BACKGROUND, nudgeHandler);
  45                 }
  46
  47                 public function hide():void {
  48                         visible=enabled=false;
  49
  50                         map.removeEventListener(MapEvent.MOVE, moveHandler);
  51                         map.removeEventListener(MapEvent.RESIZE, resizeHandler);
  52                         map.removeEventListener(MapEvent.NUDGE_BACKGROUND, nudgeHandler);
  53                 }
  54
  55                 private function initHandler(event:YahooMapEvent):void {
  56                         inited=true;
  57                         if (map.centre_lat) { moveto(map.centre_lat, map.centre_lon, map.scale); }
  58                         this.removeEventListener(YahooMapEvent.MAP_INITIALIZE, initHandler);
  59                         visible=enabled;
  60                 }
  61
  62                 private function moveHandler(event:MapEvent):void {
  63                         if (!inited) { return; }
  64                         moveto(event.params.lat, event.params.lon, event.params.scale);
  65                 }
  66
  67                 private function moveto(lat:Number,lon:Number,scale:uint):void {
  68                         if (scale>MAXZOOM) { visible=false; return; }
  69                         _lat=lat; _lon=lon; _scale=scale;
  70
  71                         visible=true;
  72                         this.zoomLevel=18-scale;
  73                         this.centerLatLon=new LatLon(lat+offset_lat, lon+offset_lon);
  74                 }
  75
  76                 private function resizeHandler(event:MapEvent):void {
  77                         moveto(map.centre_lat, map.centre_lon, map.scale);
  78                         this.setSize(event.params.width, event.params.height);
  79                 }
  80
  81                 private function nudgeHandler(event:MapEvent):void {
  82                         var cx:Number=map.lon2coord(map.centre_lon);
  83                         var cy:Number=map.lat2coord(map.centre_lat);
  84                         offset_lon+=map.coord2lon(cx-event.params.x)-map.centre_lon;
  85                         offset_lat+=map.coord2lat(cy-event.params.y)-map.centre_lat;
  86                         moveto(_lat,_lon,_scale);
  87                 }
  88         }
  89 }