net/systemeD/halcyon/Map.as

   1 package net.systemeD.halcyon {
   2
   3         import flash.text.TextField;
   4         import flash.display.DisplayObjectContainer;
   5         import flash.display.Loader;
   6         import flash.display.Sprite;
   7         import flash.display.Shape;
   8         import flash.display.Stage;
   9         import flash.display.BitmapData;
  10         import flash.display.LoaderInfo;
  11         import flash.text.Font;
  12         import flash.utils.ByteArray;
  13         import flash.events.*;
  14         import flash.net.*;
  15
  16     import net.systemeD.halcyon.connection.*;
  17     import net.systemeD.halcyon.connection.EntityEvent;
  18         import net.systemeD.halcyon.styleparser.*;
  19
  20 //      for experimental export function:
  21 //      import flash.net.FileReference;
  22 //      import com.adobe.images.JPGEncoder;
  23
  24     public class Map extends Sprite {
  25
  26                 public const MASTERSCALE:Number=5825.4222222222;// master map scale - how many Flash pixels in 1 degree longitude
  27                                                                                                                 // (for Landsat, 5120)
  28                 public const MINSCALE:uint=13;                                  // don't zoom out past this
  29                 public const MAXSCALE:uint=19;                                  // don't zoom in past this
  30
  31                 public var ruleset:RuleSet=new RuleSet(redrawPOIs);     // rules
  32
  33                 public var ways:Object=new Object();                    // geodata
  34                 public var nodes:Object=new Object();                   //  |
  35                 public var pois:Object=new Object();                    //  |
  36                 public var relations:Object=new Object();               //  |
  37
  38                 public var scale:uint=14;                                               // map scale
  39                 public var scalefactor:Number=MASTERSCALE;              // current scaling factor for lon/latp
  40                 public var bigedge_l:Number= 999999;                    // area of largest whichways
  41                 public var bigedge_r:Number=-999999;                    //  |
  42                 public var bigedge_b:Number= 999999;                    //  |
  43                 public var bigedge_t:Number=-999999;                    //  |
  44
  45                 public var waycount:uint=0;                                             // ways:                number currently loaded
  46                 public var waysrequested:uint=0;                                //                              total number requested
  47                 public var waysreceived:uint=0;                                 //                              total number received
  48                 public var relcount:uint=0;                                             // relations:   number currently loaded
  49                 public var relsrequested:uint=0;                                //                              total number requested
  50                 public var relsreceived:uint=0;                                 //                              total number received
  51                 public var poicount:uint=0;                                             // POIs:                number currently loaded
  52                 public var whichrequested:uint=0;                               // whichways:   total number requested
  53                 public var whichreceived:uint=0;                                //                              total number received
  54
  55                 public var edge_l:Number;                                               // current bounding box
  56                 public var edge_r:Number;                                               //  |
  57                 public var edge_t:Number;                                               //  |
  58                 public var edge_b:Number;                                               //  |
  59
  60                 public var baselon:Number;                                              // urllon-xradius/masterscale;
  61                 public var basey:Number;                                                // lat2lat2p(urllat)+yradius/masterscale;
  62                 public var mapwidth:uint;                                               // width (Flash pixels)
  63                 public var mapheight:uint;                                              // height (Flash pixels)
  64
  65                 private var dragging:Boolean=false;                             // dragging map?
  66                 private var lastxmouse:Number;                                  //  |
  67                 private var lastymouse:Number;                                  //  |
  68
  69                 public var initparams:Object;                                   // object containing
  70
  71                 public var backdrop:Object;                                             // reference to backdrop sprite
  72
  73                 public var connection:Connection;                               // server connection
  74
  75                 // ------------------------------------------------------------------------------------------
  76                 // Map constructor function
  77
  78         public function Map(initparams:Object) {
  79
  80                         // Set up layering
  81                         // [layer][2]                   - names
  82                         // [layer][1][sublayer] - stroke
  83                         // [layer][0]                   - fill
  84
  85                         for (var l:int=0; l<13; l++) {                          // 11 layers (10 is +5, 0 is -5)
  86                                 var s:Sprite = getPaintSprite();                //  |
  87                                 s.addChild(getPaintSprite());                   //      | 0 fill
  88                                 var t:Sprite = getPaintSprite();                //  | 1 stroke
  89                                 for (var j:int=0; j<11; j++) {                  //      |  | ten sublayers
  90                                         t.addChild(getPaintSprite());           //  |  |  |
  91                                 }                                                                               //  |  |  |
  92                                 s.addChild(t);                                                  //  |  |
  93                                 s.addChild(getPaintSprite());                   //      | 2 names
  94                                 addChild(s);                                                    //  |
  95                         }
  96                         s=getPaintSprite(); addChild(s);                        // 11 - POIs
  97                         s=getPaintSprite(); addChild(s);                        // 12 - shields and POI names
  98
  99                         this.initparams=initparams;
 100                         connection = Connection.getConnection(initparams);
 101             connection.addEventListener(Connection.NEW_WAY, newWayCreated);
 102             connection.addEventListener(Connection.NEW_POI, newPOICreated);
 103                         gotEnvironment(null);
 104         }
 105
 106         private function getPaintSprite():Sprite {
 107             var s:Sprite = new Sprite();
 108             s.mouseEnabled = false;
 109             return s;
 110         }
 111
 112                 public function gotEnvironment(r:Object):void {
 113                         var loader:Loader = new Loader();
 114                         loader.contentLoaderInfo.addEventListener(Event.COMPLETE, gotFont);
 115                         loader.load(new URLRequest("FontLibrary.swf"));
 116                 }
 117
 118                 public function gotFont(r:Event):void {
 119                         var FontLibrary:Class = r.target.applicationDomain.getDefinition("FontLibrary") as Class;
 120                         Font.registerFont(FontLibrary.DejaVu);
 121
 122                         if (initparams['lat'] != null) {
 123                                 // parameters sent from HTML
 124                                 init(initparams['lat'],
 125                                          initparams['lon'],
 126                                          initparams['zoom'],
 127                                          initparams['style']);
 128
 129                         } else {
 130                                 // somewhere innocuous
 131                                 init(53.09465,-2.56495,17,"test.yaml?d="+Math.random());
 132                         }
 133                 }
 134
 135                 // ------------------------------------------------------------------------------------------
 136                 // Initialise map at a given lat/lon
 137
 138         public function init(startlat:Number,startlon:Number,startscale:uint,style:String):void {
 139
 140                         ruleset.load(style);
 141 //                      rules.initExample();            // initialise dummy rules
 142
 143                         //updateSize();
 144
 145                         scale=startscale;
 146                         scalefactor=MASTERSCALE/Math.pow(2,14-scale);
 147                         baselon    =startlon          -(mapwidth /2)/scalefactor;
 148                         basey      =lat2latp(startlat)+(mapheight/2)/scalefactor;
 149                         addDebug("Baselon "+baselon+", basey "+basey);
 150                         updateCoords(0,0);
 151                         download();
 152
 153         }
 154
 155                 // ------------------------------------------------------------------------------------------
 156                 // Recalculate co-ordinates from new Flash origin
 157
 158                 public function updateCoords(tx:Number,ty:Number):void {
 159                         x=tx; y=ty;
 160
 161                         // ** calculate tile_l etc.
 162                         edge_t=coord2lat(-y          );
 163                         edge_b=coord2lat(-y+mapheight);
 164                         edge_l=coord2lon(-x          );
 165                         edge_r=coord2lon(-x+mapwidth );
 166                         addDebug("Lon "+edge_l+"-"+edge_r);
 167                         addDebug("Lat "+edge_b+"-"+edge_t);
 168                 }
 169
 170                 public function updateCoordsFromLatLon(lat:Number,lon:Number):void {
 171                         var cy:Number=-(lat2coord(lat)-mapheight/2);
 172                         var cx:Number=-(lon2coord(lon)-mapwidth/2);
 173                         updateCoords(cx,cy);
 174                 }
 175
 176
 177                 // Co-ordinate conversion functions
 178
 179                 public function latp2coord(a:Number):Number     { return -(a-basey)*scalefactor; }
 180                 public function coord2latp(a:Number):Number     { return a/-scalefactor+basey; }
 181                 public function lon2coord(a:Number):Number      { return (a-baselon)*scalefactor; }
 182                 public function coord2lon(a:Number):Number      { return a/scalefactor+baselon; }
 183
 184                 public function latp2lat(a:Number):Number       { return 180/Math.PI * (2 * Math.atan(Math.exp(a*Math.PI/180)) - Math.PI/2); }
 185                 public function lat2latp(a:Number):Number       { return 180/Math.PI * Math.log(Math.tan(Math.PI/4+a*(Math.PI/180)/2)); }
 186
 187                 public function lat2coord(a:Number):Number      { return -(lat2latp(a)-basey)*scalefactor; }
 188                 public function coord2lat(a:Number):Number      { return latp2lat(a/-scalefactor+basey); }
 189
 190 //              public function centrelat(o) { return coord2lat((yradius-_root.map._y-o)/Math.pow(2,_root.scale-13)); }
 191 //              public function centrelon(o) { return coord2lon((xradius-_root.map._x-o)/Math.pow(2,_root.scale-13)); }
 192
 193
 194                 // ------------------------------------------------------------------------------------------
 195                 // Resize map size based on current stage and height
 196
 197                 public function updateSize(w:uint, h:uint):void {
 198                         mapwidth = w;
 199                         mapheight= h;
 200             if ( backdrop != null ) {
 201                 backdrop.width=mapwidth;
 202                 backdrop.height=mapheight;
 203             }
 204             if ( mask != null ) {
 205                 mask.width=mapwidth;
 206                 mask.height=mapheight;
 207             }
 208                 }
 209
 210                 // ------------------------------------------------------------------------------------------
 211                 // Download map data
 212                 // (typically from whichways, but will want to add more connections)
 213
 214                 public function download():void {
 215                         this.dispatchEvent(new MapEvent(MapEvent.DOWNLOAD,edge_l,edge_r,edge_t,edge_b));
 216
 217                         if (edge_l>=bigedge_l && edge_r<=bigedge_r &&
 218                                 edge_b>=bigedge_b && edge_t<=bigedge_t) { return; }     // we have already loaded this area, so ignore
 219                         bigedge_l=edge_l; bigedge_r=edge_r;
 220                         bigedge_b=edge_b; bigedge_t=edge_t;
 221                         addDebug("Calling with "+edge_l+"-"+edge_r+", "+edge_t+"-"+edge_b);
 222                         connection.loadBbox(edge_l,edge_r,edge_t,edge_b);
 223                 }
 224
 225
 226
 227         private function newWayCreated(event:EntityEvent):void {
 228             var way:Way = event.entity as Way;
 229             ways[way.id] = new WayUI(way, this);
 230         }
 231
 232         private function newPOICreated(event:EntityEvent):void {
 233             var node:Node = event.entity as Node;
 234             pois[node.id] = new POI(node, this);
 235         }
 236
 237         public function setHighlight(entity:Entity, highlight:Boolean):void {
 238             if ( entity is Way ) {
 239                 var wayUI:WayUI = ways[entity.id];
 240                 if ( wayUI != null )
 241                     wayUI.setHighlight(highlight);
 242             }
 243         }
 244
 245         // Handle mouse events on ways/nodes
 246         private var mapController:MapController = null;
 247
 248         public function setController(controller:MapController):void {
 249             this.mapController = controller;
 250         }
 251
 252         public function wayMouseEvent(event:MouseEvent, way:Way):void {
 253             if ( mapController != null )
 254                 mapController.entityMouseEvent(event, way);
 255
 256         }
 257
 258                 // ------------------------------------------------------------------------------------------
 259                 // Redraw all items, zoom in and out
 260
 261                 public function redraw():void {
 262                         for each (var w:WayUI in ways) { w.recalculate(); w.redraw(); }
 263                         for each (var p:POI in pois) { p.redraw(); }
 264                 }
 265
 266                 public function redrawPOIs():void {
 267                         for each (var p:POI in pois) { p.redraw(); }
 268                 }
 269
 270                 public function zoomIn():void {
 271                         if (scale==MAXSCALE) { return; }
 272                         changeScale(scale+1);
 273                 }
 274
 275                 public function zoomOut():void {
 276                         if (scale==MINSCALE) { return; }
 277                         changeScale(scale-1);
 278                 }
 279
 280                 private function changeScale(newscale:uint):void {
 281                         addDebug("new scale "+newscale);
 282                         scale=newscale;
 283                         scalefactor=MASTERSCALE/Math.pow(2,14-scale);
 284                         updateCoordsFromLatLon((edge_t+edge_b)/2,(edge_l+edge_r)/2);    // recentre
 285                         download();
 286                         redraw();
 287                 }
 288
 289                 private function reportPosition():void {
 290                         addDebug("lon "+coord2lon(mouseX)+", lat "+coord2lat(mouseY));
 291                 }
 292
 293                 // ------------------------------------------------------------------------------------------
 294                 // Export (experimental)
 295                 // ** just a bit of fun for now!
 296                 // really needs to take a bbox, and make sure that the image is correctly cropped/resized
 297                 // to that area (will probably require creating a new DisplayObject with a different origin
 298                 // and mask)
 299 /*
 300                 public function export():void {
 301                         addDebug("size is "+this.width+","+this.height);
 302                         var jpgSource:BitmapData = new BitmapData(800,800); // (this.width, this.height);
 303                         jpgSource.draw(this);
 304                         var jpgEncoder:JPGEncoder = new JPGEncoder(85);
 305                         var jpgStream:ByteArray = jpgEncoder.encode(jpgSource);
 306                         var fileRef:FileReference = new FileReference();
 307 //                      fileRef.save(jpgStream,'map.jpeg');
 308                 }
 309
 310 */
 311
 312                 // ==========================================================================================
 313                 // Events
 314
 315                 // ------------------------------------------------------------------------------------------
 316                 // Mouse events
 317
 318                 public function mouseDownHandler(event:MouseEvent):void {
 319                         dragging=true;
 320                         lastxmouse=mouseX; lastymouse=mouseY;
 321                 }
 322
 323                 public function mouseUpHandler(event:MouseEvent):void {
 324                         if (!dragging) { return; }
 325                         dragging=false;
 326                         updateCoords(x,y);
 327                         download();
 328                 }
 329
 330                 public function mouseMoveHandler(event:MouseEvent):void {
 331                         if (!dragging) { return; }
 332                         x+=mouseX-lastxmouse;
 333                         y+=mouseY-lastymouse;
 334                         lastxmouse=mouseX; lastymouse=mouseY;
 335                 }
 336
 337                 // ------------------------------------------------------------------------------------------
 338                 // Miscellaneous events
 339
 340                 public function keyUpHandler(event:KeyboardEvent):void {
 341 // addDebug("pressed "+event.keyCode);
 342             if ( !event.ctrlKey ) return;
 343                         if (event.keyCode==82) { this.redraw(); }                       // R - redraw
 344                         if (event.keyCode==73) { this.zoomIn(); }                       // I - zoom in
 345                         if (event.keyCode==79) { this.zoomOut(); }                      // O - zoom out
 346                         if (event.keyCode==76) { this.reportPosition(); }       // L - report lat/long
 347 //                      if (event.keyCode==69) { this.export(); }                       // E - export
 348                 }
 349
 350                 public function connectionError(err:Object=null): void {
 351                         addDebug("got error");
 352                 }
 353
 354                 // ------------------------------------------------------------------------------------------
 355                 // Debugging
 356
 357                 public function addDebug(text:String):void {
 358                         if (!Globals.vars.hasOwnProperty('debug')) return;
 359                         if (!Globals.vars.debug.visible) return;
 360                         Globals.vars.debug.appendText(text+"\n");
 361                         Globals.vars.debug.scrollV=Globals.vars.debug.maxScrollV;
 362                 }
 363
 364         }
 365 }