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         import net.systemeD.halcyon.vectorlayers.*;
  20         import net.systemeD.halcyon.Globals;
  21
  22 //      for experimental export function:
  23 //      import flash.net.FileReference;
  24 //      import com.adobe.images.JPGEncoder;
  25
  26     public class Map extends Sprite {
  27
  28                 public const MASTERSCALE:Number=5825.4222222222;// master map scale - how many Flash pixels in 1 degree longitude
  29                                                                                                                 // (for Landsat, 5120)
  30                 public const MINSCALE:uint=13;                                  // don't zoom out past this
  31                 public const MAXSCALE:uint=19;                                  // don't zoom in past this
  32
  33                 public var paint:MapPaint;                                              // sprite for ways and (POI/tagged) nodes in core layer
  34                 public var vectorbg:Sprite;                                             // sprite for vector background layers
  35
  36                 public var scale:uint=14;                                               // map scale
  37                 public var scalefactor:Number=MASTERSCALE;              // current scaling factor for lon/latp
  38                 public var bigedge_l:Number= 999999;                    // area of largest whichways
  39                 public var bigedge_r:Number=-999999;                    //  |
  40                 public var bigedge_b:Number= 999999;                    //  |
  41                 public var bigedge_t:Number=-999999;                    //  |
  42
  43                 public var edge_l:Number;                                               // current bounding box
  44                 public var edge_r:Number;                                               //  |
  45                 public var edge_t:Number;                                               //  |
  46                 public var edge_b:Number;                                               //  |
  47                 public var centre_lat:Number;                                   // centre lat/lon
  48                 public var centre_lon:Number;                                   //  |
  49
  50                 public var baselon:Number;                                              // urllon-xradius/masterscale;
  51                 public var basey:Number;                                                // lat2lat2p(urllat)+yradius/masterscale;
  52                 public var mapwidth:uint;                                               // width (Flash pixels)
  53                 public var mapheight:uint;                                              // height (Flash pixels)
  54
  55                 public var dragstate:uint=NOT_DRAGGING;                 // dragging map
  56                 private var _draggable:Boolean=true;                    //  |
  57                 private var lastxmouse:Number;                                  //  |
  58                 private var lastymouse:Number;                                  //  |
  59                 private var downX:Number;                                               //  |
  60                 private var downY:Number;                                               //  |
  61                 public const NOT_DRAGGING:uint=0;                               //  |
  62                 public const NOT_MOVED:uint=1;                                  //  |
  63                 public const DRAGGING:uint=2;                                   //  |
  64
  65                 public var initparams:Object;                                   // object containing HTML page parameters
  66
  67                 public var backdrop:Object;                                             // reference to backdrop sprite
  68                 public var tileset:TileSet;                                             // 900913 tile background
  69                 private var tileurl:String='';                                  // internal tile URL
  70                 private var styleurl:String='';                                 // internal style URL
  71                 public var showall:Boolean=true;                                // show all objects, even if unstyled?
  72
  73                 public var connection:Connection;                               // server connection
  74                 public var vectorlayers:Array=[];                               // VectorLayer objects
  75
  76                 public const TILESPRITE:uint=0;
  77                 public const VECTORSPRITE:uint=1;
  78                 public const WAYSPRITE:uint=2;
  79                 public const NAMESPRITE:uint=13;
  80
  81                 // ------------------------------------------------------------------------------------------
  82                 // Map constructor function
  83
  84         public function Map(initparams:Object) {
  85
  86                         this.initparams=initparams;
  87                         connection = Connection.getConnection(initparams);
  88             connection.addEventListener(Connection.NEW_WAY, newWayCreated);
  89             connection.addEventListener(Connection.NEW_POI, newPOICreated);
  90             connection.addEventListener(Connection.WAY_RENUMBERED, wayRenumbered);
  91             connection.addEventListener(Connection.NODE_RENUMBERED, nodeRenumbered);
  92                         gotEnvironment(null);
  93
  94                         addEventListener(Event.ENTER_FRAME, everyFrame);
  95         }
  96
  97                 public function gotEnvironment(r:Object):void {
  98                         var loader:Loader = new Loader();
  99                         loader.contentLoaderInfo.addEventListener(Event.COMPLETE, gotFont);
 100                         loader.load(new URLRequest("FontLibrary.swf"));
 101                 }
 102
 103                 public function gotFont(r:Event):void {
 104                         var FontLibrary:Class = r.target.applicationDomain.getDefinition("FontLibrary") as Class;
 105                         Font.registerFont(FontLibrary.DejaVu);
 106
 107                         if (initparams['lat'] != null) {
 108                                 // parameters sent from HTML
 109                                 init(initparams['lat'],
 110                                          initparams['lon'],
 111                                          initparams['zoom']);
 112
 113                         } else {
 114                                 // somewhere innocuous
 115                                 init(53.09465,-2.56495,17);
 116                         }
 117                 }
 118
 119                 // ------------------------------------------------------------------------------------------
 120                 // Initialise map at a given lat/lon
 121
 122         public function init(startlat:Number,startlon:Number,startscale:uint=0):void {
 123                         while (numChildren) { removeChildAt(0); }
 124
 125                         tileset=new TileSet(this);                                      // 0 - 900913 background
 126                         addChild(tileset);                                                      //   |
 127                         tileset.init(tileurl);                                          //   |
 128
 129                         vectorbg = new Sprite();                                        // 1 - vector background layers
 130                         addChild(vectorbg);                                                     //   |
 131
 132                         paint = new MapPaint(this,-5,5);                        // 2 - core paint object
 133                         addChild(paint);                                                        //   |
 134                         paint.isBackground=false;                                       //   |
 135
 136                         if (styleurl) {                                                         // if we've only just set up paint, then setStyle won't have created the RuleSet
 137                                 paint.ruleset=new RuleSet(MINSCALE,MAXSCALE,redraw,redrawPOIs);
 138                                 paint.ruleset.loadFromCSS(styleurl);
 139                         }
 140                         if (startscale>0) { scale=startscale; }
 141
 142                         scalefactor=MASTERSCALE/Math.pow(2,13-scale);
 143                         baselon    =startlon          -(mapwidth /2)/scalefactor;
 144                         basey      =lat2latp(startlat)+(mapheight/2)/scalefactor;
 145                         addDebug("Baselon "+baselon+", basey "+basey);
 146                         updateCoords(0,0);
 147                         download();
 148
 149         }
 150
 151                 // ------------------------------------------------------------------------------------------
 152                 // Recalculate co-ordinates from new Flash origin
 153
 154                 public function updateCoords(tx:Number,ty:Number):void {
 155                         x=tx; y=ty;
 156
 157                         edge_t=coord2lat(-y          );
 158                         edge_b=coord2lat(-y+mapheight);
 159                         edge_l=coord2lon(-x          );
 160                         edge_r=coord2lon(-x+mapwidth );
 161                         setCentre();
 162
 163                         tileset.update();
 164                 }
 165
 166                 public function updateCoordsFromLatLon(lat:Number,lon:Number):void {
 167                         var cy:Number=-(lat2coord(lat)-mapheight/2);
 168                         var cx:Number=-(lon2coord(lon)-mapwidth/2);
 169                         updateCoords(cx,cy);
 170                 }
 171
 172                 private function setCentre():void {
 173                         centre_lat=coord2lat(-y+mapheight/2);
 174                         centre_lon=coord2lon(-x+mapwidth/2);
 175                         this.dispatchEvent(new MapEvent(MapEvent.MOVE, {lat:centre_lat, lon:centre_lon, scale:scale}));
 176                 }
 177
 178                 public function nudgeBackground(x:Number,y:Number):void {
 179                         this.dispatchEvent(new MapEvent(MapEvent.NUDGE_BACKGROUND, { x: x, y: y }));
 180                 }
 181
 182                 // Co-ordinate conversion functions
 183
 184                 public function latp2coord(a:Number):Number     { return -(a-basey)*scalefactor; }
 185                 public function coord2latp(a:Number):Number     { return a/-scalefactor+basey; }
 186                 public function lon2coord(a:Number):Number      { return (a-baselon)*scalefactor; }
 187                 public function coord2lon(a:Number):Number      { return a/scalefactor+baselon; }
 188
 189                 public function latp2lat(a:Number):Number       { return 180/Math.PI * (2 * Math.atan(Math.exp(a*Math.PI/180)) - Math.PI/2); }
 190                 public function lat2latp(a:Number):Number       { return 180/Math.PI * Math.log(Math.tan(Math.PI/4+a*(Math.PI/180)/2)); }
 191
 192                 public function lat2coord(a:Number):Number      { return -(lat2latp(a)-basey)*scalefactor; }
 193                 public function coord2lat(a:Number):Number      { return latp2lat(a/-scalefactor+basey); }
 194
 195 //              public function centrelat(o) { return coord2lat((yradius-_root.map._y-o)/Math.pow(2,_root.scale-13)); }
 196 //              public function centrelon(o) { return coord2lon((xradius-_root.map._x-o)/Math.pow(2,_root.scale-13)); }
 197
 198
 199                 // ------------------------------------------------------------------------------------------
 200                 // Resize map size based on current stage and height
 201
 202                 public function updateSize(w:uint, h:uint):void {
 203                         this.dispatchEvent(new MapEvent(MapEvent.RESIZE, {width:w, height:h}));
 204
 205                         mapwidth = w;
 206                         mapheight= h;
 207             if ( backdrop != null ) {
 208                 backdrop.width=mapwidth;
 209                 backdrop.height=mapheight;
 210             }
 211             if ( mask != null ) {
 212                 mask.width=mapwidth;
 213                 mask.height=mapheight;
 214             }
 215                 }
 216
 217                 // ------------------------------------------------------------------------------------------
 218                 // Download map data
 219                 // (typically from whichways, but will want to add more connections)
 220
 221                 public function download():void {
 222                         this.dispatchEvent(new MapEvent(MapEvent.DOWNLOAD, {minlon:edge_l, maxlon:edge_r, maxlat:edge_t, minlat:edge_b} ));
 223
 224                         if (edge_l>=bigedge_l && edge_r<=bigedge_r &&
 225                                 edge_b>=bigedge_b && edge_t<=bigedge_t) { return; }     // we have already loaded this area, so ignore
 226                         bigedge_l=edge_l; bigedge_r=edge_r;
 227                         bigedge_b=edge_b; bigedge_t=edge_t;
 228                         if (connection.waycount>1000) {
 229                                 connection.purgeOutside(edge_l,edge_r,edge_t,edge_b);
 230                         }
 231                         addDebug("Calling download with "+edge_l+"-"+edge_r+", "+edge_t+"-"+edge_b);
 232                         connection.loadBbox(edge_l,edge_r,edge_t,edge_b);
 233                 }
 234
 235         private function newWayCreated(event:EntityEvent):void {
 236             var way:Way = event.entity as Way;
 237                         if (!way.loaded || !way.within(edge_l,edge_r,edge_t,edge_b)) { return; }
 238                         paint.createWayUI(way);
 239         }
 240
 241         private function newPOICreated(event:EntityEvent):void {
 242             var node:Node = event.entity as Node;
 243                         if (!node.within(edge_l,edge_r,edge_t,edge_b)) { return; }
 244                         paint.createNodeUI(node);
 245         }
 246
 247                 private function wayRenumbered(event:EntityRenumberedEvent):void {
 248             var way:Way = event.entity as Way;
 249                         paint.renumberWayUI(way,event.oldID);
 250                 }
 251
 252                 private function nodeRenumbered(event:EntityRenumberedEvent):void {
 253             var node:Node = event.entity as Node;
 254                         paint.renumberNodeUI(node,event.oldID);
 255                 }
 256
 257         public function setHighlight(entity:Entity, settings:Object):void {
 258                         var stateType:String;
 259                         var ui:EntityUI=null;
 260                         if      ( entity is Way  ) { ui = paint.wayuis[entity.id]; }
 261                         else if ( entity is Node ) { ui = paint.nodeuis[entity.id]; }
 262                         if (ui==null) { return; }
 263                         for (stateType in settings) {
 264                                 ui.setHighlight(stateType, settings[stateType]);
 265                         }
 266                         ui.redraw();
 267         }
 268
 269         // Handle mouse events on ways/nodes
 270         private var mapController:MapController = null;
 271
 272         public function setController(controller:MapController):void {
 273             this.mapController = controller;
 274         }
 275
 276         public function entityMouseEvent(event:MouseEvent, entity:Entity):void {
 277             if ( mapController != null )
 278                 mapController.entityMouseEvent(event, entity);
 279
 280         }
 281
 282                 // ------------------------------------------------------------------------------------------
 283                 // Redraw all items, zoom in and out
 284
 285                 public function updateEntityUIs(redraw:Boolean,remove:Boolean):void {
 286                         paint.updateEntityUIs(connection.getObjectsByBbox(edge_l, edge_r, edge_t, edge_b), redraw, remove);
 287                         for each (var v:VectorLayer in vectorlayers) {
 288                                 v.paint.updateEntityUIs(v.getObjectsByBbox(edge_l, edge_r, edge_t, edge_b), redraw, remove);
 289                         }
 290                 }
 291                 public function redraw():void {
 292                         paint.redraw();
 293                         for each (var v:VectorLayer in vectorlayers) { v.paint.redraw(); }
 294                 }
 295                 public function redrawPOIs():void {
 296                         paint.redrawPOIs();
 297                         for each (var v:VectorLayer in vectorlayers) { v.paint.redrawPOIs(); }
 298                 }
 299
 300                 public function zoomIn():void {
 301                         if (scale==MAXSCALE) { return; }
 302                         changeScale(scale+1);
 303                 }
 304
 305                 public function zoomOut():void {
 306                         if (scale==MINSCALE) { return; }
 307                         changeScale(scale-1);
 308                 }
 309
 310                 private function changeScale(newscale:uint):void {
 311                         addDebug("new scale "+newscale);
 312                         scale=newscale;
 313                         scalefactor=MASTERSCALE/Math.pow(2,13-scale);
 314                         updateCoordsFromLatLon((edge_t+edge_b)/2,(edge_l+edge_r)/2);    // recentre
 315                         tileset.changeScale(scale);
 316                         updateEntityUIs(true,true);
 317                         download();
 318                 }
 319
 320                 private function reportPosition():void {
 321                         addDebug("lon "+coord2lon(mouseX)+", lat "+coord2lat(mouseY));
 322                 }
 323
 324                 public function setStyle(url:String):void {
 325                         styleurl=url;
 326                         if (paint) {
 327                                 paint.ruleset=new RuleSet(MINSCALE,MAXSCALE,redraw,redrawPOIs);
 328                                 paint.ruleset.loadFromCSS(url);
 329                         }
 330         }
 331
 332                 public function setBackground(url:String):void {
 333                         tileurl=url;
 334                         if (tileset) { tileset.init(url, url!=''); }
 335                 }
 336
 337                 public function setDimming(dim:Boolean):void {
 338                         if (tileset) { tileset.setDimming(dim); }
 339                 }
 340
 341                 // ------------------------------------------------------------------------------------------
 342                 // Export (experimental)
 343                 // ** just a bit of fun for now!
 344                 // really needs to take a bbox, and make sure that the image is correctly cropped/resized
 345                 // to that area (will probably require creating a new DisplayObject with a different origin
 346                 // and mask)
 347 /*
 348                 public function export():void {
 349                         addDebug("size is "+this.width+","+this.height);
 350                         var jpgSource:BitmapData = new BitmapData(800,800); // (this.width, this.height);
 351                         jpgSource.draw(this);
 352                         var jpgEncoder:JPGEncoder = new JPGEncoder(85);
 353                         var jpgStream:ByteArray = jpgEncoder.encode(jpgSource);
 354                         var fileRef:FileReference = new FileReference();
 355 //                      fileRef.save(jpgStream,'map.jpeg');
 356                 }
 357
 358 */
 359
 360                 // ==========================================================================================
 361                 // Events
 362
 363                 // ------------------------------------------------------------------------------------------
 364                 // Mouse events
 365
 366                 public function set draggable(draggable:Boolean):void {
 367                         _draggable=draggable;
 368                         dragstate=NOT_DRAGGING;
 369                 }
 370
 371                 public function mouseDownHandler(event:MouseEvent):void {
 372                         if (!_draggable) { return; }
 373                         dragstate=NOT_MOVED;
 374                         lastxmouse=downX=mouseX;
 375                         lastymouse=downY=mouseY;
 376                 }
 377
 378                 public function mouseUpHandler(event:MouseEvent):void {
 379                         if (dragstate==DRAGGING) {
 380                                 updateCoords(x,y);
 381                                 updateEntityUIs(false, false);
 382                                 download();
 383                         }
 384                         dragstate=NOT_DRAGGING;
 385                 }
 386
 387                 public function mouseMoveHandler(event:MouseEvent):void {
 388                         if (!_draggable) { return; }
 389                         if (dragstate==NOT_DRAGGING) { return; }
 390
 391                         if (dragstate==NOT_MOVED && Math.abs(downX - mouseX) < 3 && Math.abs(downY - mouseY) < 3) {
 392                                 return;
 393                         }
 394
 395                         dragstate=DRAGGING;
 396                         x+=mouseX-lastxmouse;
 397                         y+=mouseY-lastymouse;
 398                         lastxmouse=mouseX; lastymouse=mouseY;
 399                         setCentre();
 400                 }
 401
 402                 // ------------------------------------------------------------------------------------------
 403                 // Do every frame
 404
 405                 private function everyFrame(event:Event):void {
 406                         if (tileset) { tileset.serviceQueue(); }
 407                 }
 408
 409                 // ------------------------------------------------------------------------------------------
 410                 // Miscellaneous events
 411
 412                 public function keyUpHandler(event:KeyboardEvent):void {
 413                         if ( !event.ctrlKey ) return;
 414                         addDebug("pressed "+event.keyCode);
 415                         if (event.keyCode==73) { zoomIn(); }                    // I - zoom in
 416                         if (event.keyCode==79) { zoomOut(); }                   // O - zoom out
 417                         if (event.keyCode==76) { reportPosition(); }    // L - report lat/long
 418                 }
 419
 420                 public function connectionError(err:Object=null): void {
 421                         addDebug("got error");
 422                 }
 423
 424                 // ------------------------------------------------------------------------------------------
 425                 // Debugging
 426
 427                 public function clearDebug():void {
 428                         if (!Globals.vars.hasOwnProperty('debug')) return;
 429                         Globals.vars.debug.text='';
 430                 }
 431
 432                 public function addDebug(text:String):void {
 433                         if (!Globals.vars.hasOwnProperty('debug')) return;
 434                         if (!Globals.vars.debug.visible) return;
 435                         Globals.vars.debug.appendText(text+"\n");
 436                         Globals.vars.debug.scrollV=Globals.vars.debug.maxScrollV;
 437                 }
 438
 439         }
 440 }