net/systemeD/halcyon/POI.as

   1 package net.systemeD.halcyon {
   2
   3         import flash.display.*;
   4         import flash.events.*;
   5         import flash.text.AntiAliasType;
   6         import flash.text.GridFitType;
   7         import flash.text.TextField;
   8         import flash.text.TextFormat;
   9     import net.systemeD.halcyon.connection.Node;
  10         import net.systemeD.halcyon.styleparser.*;
  11
  12         public class POI extends Object {
  13
  14         private var node:Node;
  15                 public var map:Map;                                                     // reference to parent map
  16                 public var icon:Bitmap;                                         // instance in display list
  17                 public var name:Sprite;                                         //  |
  18                 private var iconname:String='';                         // name of icon
  19
  20                 public static const DEFAULT_TEXTFIELD_PARAMS:Object = {
  21 //                      embedFonts: true,
  22                         antiAliasType: AntiAliasType.ADVANCED,
  23                         gridFitType: GridFitType.NONE
  24                 };
  25 //              [Embed(source="fonts/DejaVuSans.ttf", fontFamily="DejaVu", fontWeight="normal", mimeType="application/x-font-truetype")]
  26 //              public static var DejaVu:Class;
  27
  28                 public function POI(node:Node, map:Map) {
  29                         this.map = map;
  30                         this.node = node;
  31                         redraw();
  32                 }
  33
  34                 public function redraw():void {
  35                         var tags:Object = node.getTagsCopy();
  36                         var styles:Array=map.ruleset.getStyles(true,tags,map.scale);
  37                         var r:Boolean=false;    // ** rendered
  38                         for each (var s:* in styles) {
  39                                 if ((s is PointStyle) && s.icon && s.icon!="") {
  40                                         r=true;
  41                                         if (s.icon!=iconname) {
  42                                                 // 'load' icon (actually just from library)
  43                                                 if (map.ruleset.images[s.icon]) {
  44                                                         var loader:Loader = new Loader();
  45                                                         loader.contentLoaderInfo.addEventListener(Event.COMPLETE, loadedIcon);
  46                                                         loader.loadBytes(map.ruleset.images[s.icon]);
  47                                                         iconname=s.icon;
  48                                                 }
  49                                         } else {
  50                                                 // already loaded, so just reposition
  51                                                 updatePosition();
  52                                                 iconname=s.icon;
  53                                         }
  54                                 } else if ((s is TextStyle) && s.tag && tags[s.tag]) {
  55                                         // create name sprite
  56                                         if (!name) {
  57                                                 name=new Sprite();
  58                                                 var c:DisplayObject=map.getChildAt(12);
  59                                                 Sprite(c).addChild(name);
  60                                         }
  61                                         s.writeNameLabel(name,tags[s.tag],map.lon2coord(node.lon),map.latp2coord(node.latp));
  62                                 }
  63                         }
  64                         if (!r && iconname!='') {
  65                                 // not rendered any more, so remove
  66                                 var l:DisplayObject=map.getChildAt(11);
  67                                 Sprite(l).removeChild(icon);
  68                                 iconname='';
  69                         }
  70                 }
  71
  72                 private function loadedIcon(event:Event):void {
  73                         icon = Bitmap(event.target.content);
  74                         var l:DisplayObject=map.getChildAt(11);
  75                         Sprite(l).addChild(icon);
  76                         updatePosition();
  77                 }
  78
  79                 private function updatePosition():void {
  80                         icon.x=map.lon2coord(node.lon)-icon.width/2;
  81                         icon.y=map.latp2coord(node.latp)-icon.height/2;
  82                 }
  83
  84         }
  85 }