net/systemeD/halcyon/Map.as

   1 package net.systemeD.halcyon {
   2
   3         import flash.display.Loader;
   4         import flash.display.Sprite;
   5         import flash.events.*;
   6         import flash.external.ExternalInterface;
   7         import flash.geom.Rectangle;
   8         import flash.net.*;
   9         import flash.text.Font;
  10         import flash.text.TextField;
  11         import flash.ui.Keyboard;
  12
  13         import net.systemeD.halcyon.connection.*;
  14         import net.systemeD.halcyon.styleparser.*;
  15
  16 //      for experimental export function:
  17 //      import flash.net.FileReference;
  18 //      import com.adobe.images.JPGEncoder;
  19
  20     /** The representation of part of the map on the screen, including information about coordinates, background imagery, paint properties etc. */
  21     public class Map extends Sprite {
  22
  23                 /** master map scale - how many Flash pixels in 1 degree longitude (for Landsat, 5120) */
  24                 public const MASTERSCALE:Number=5825.4222222222;
  25
  26                 /** don't zoom out past this */
  27                 public const MINSCALE:uint=13;
  28                 /** don't zoom in past this */
  29                 public const MAXSCALE:uint=23;
  30
  31                 /** sprite for ways and (POI/tagged) nodes in core layer */
  32                 public var paint:MapPaint;
  33                 /** sprite for vector background layers */
  34                 public var vectorbg:Sprite;
  35
  36                 /** map scale */
  37                 public var scale:uint=14;
  38                 /** current scaling factor for lon/latp */
  39                 public var scalefactor:Number=MASTERSCALE;
  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 edge_l:Number;                                               // current bounding box
  46                 public var edge_r:Number;                                               //  |
  47                 public var edge_t:Number;                                               //  |
  48                 public var edge_b:Number;                                               //  |
  49                 public var centre_lat:Number;                                   // centre lat/lon
  50                 public var centre_lon:Number;                                   //  |
  51
  52                 /** urllon-xradius/masterscale; */
  53                 public var baselon:Number;
  54                 /** lat2lat2p(urllat)+yradius/masterscale; */
  55                 public var basey:Number;
  56                 /** width (Flash pixels) */
  57                 public var mapwidth:uint;
  58                 /** height (Flash pixels) */
  59                 public var mapheight:uint;
  60
  61                 /** Is the map being panned */
  62                 public var dragstate:uint=NOT_DRAGGING;                 // dragging map (panning)
  63                 /** Can the map be panned */
  64                 private var _draggable:Boolean=true;                    //  |
  65                 private var lastxmouse:Number;                                  //  |
  66                 private var lastymouse:Number;                                  //  |
  67                 private var downX:Number;                                               //  |
  68                 private var downY:Number;                                               //  |
  69                 private var downTime:Number;                                    //  |
  70                 public const NOT_DRAGGING:uint=0;                               //  |
  71                 public const NOT_MOVED:uint=1;                                  //  |
  72                 public const DRAGGING:uint=2;                                   //  |
  73                 /** How far the map can be dragged without actually triggering a pan. */
  74                 public const TOLERANCE:uint=7;                                  //  |
  75
  76                 /** object containing HTML page parameters */
  77                 public var initparams:Object;
  78
  79                 /** reference to backdrop sprite */
  80                 public var backdrop:Object;
  81                 /** background tile object */
  82                 public var tileset:TileSet;
  83                 /** background tile URL, name and scheme */
  84                 private var tileparams:Object={ url:'' };
  85                 /** internal style URL */
  86                 private var styleurl:String='';
  87                 /** show all objects, even if unstyled? */
  88                 public var showall:Boolean=true;
  89
  90                 /** server connection */
  91                 public var connection:Connection;
  92                 /** VectorLayer objects */
  93                 public var vectorlayers:Object={};
  94
  95                 // ------------------------------------------------------------------------------------------
  96                 /** Map constructor function */
  97         public function Map(initparams:Object) {
  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             connection.addEventListener(Connection.WAY_RENUMBERED, wayRenumbered);
 104             connection.addEventListener(Connection.NODE_RENUMBERED, nodeRenumbered);
 105                         gotEnvironment(null);
 106
 107                         addEventListener(Event.ENTER_FRAME, everyFrame);
 108                         scrollRect=new Rectangle(0,0,800,600);
 109         }
 110
 111                 public function gotEnvironment(r:Object):void {
 112                         var loader:Loader = new Loader();
 113                         loader.contentLoaderInfo.addEventListener(Event.COMPLETE, gotFont);
 114                         loader.load(new URLRequest("FontLibrary.swf"));
 115                 }
 116
 117                 public function gotFont(r:Event):void {
 118                         var FontLibrary:Class = r.target.applicationDomain.getDefinition("FontLibrary") as Class;
 119                         Font.registerFont(FontLibrary.DejaVu);
 120
 121                         if (initparams['lat'] != null) {
 122                                 // parameters sent from HTML
 123                                 init(initparams['lat'],
 124                                          initparams['lon'],
 125                                          initparams['zoom']);
 126
 127                         } else {
 128                                 // somewhere innocuous
 129                                 init(53.09465,-2.56495,17);
 130                         }
 131                 }
 132
 133                 // ------------------------------------------------------------------------------------------
 134                 /** Initialise map at a given lat/lon */
 135         public function init(startlat:Number, startlon:Number, startscale:uint=0):void {
 136                         while (numChildren) { removeChildAt(0); }
 137
 138                         tileset=new TileSet(this);                                      // 0 - 900913 background
 139                         if (initparams['tileblocks']) {                         //   | option to block dodgy tile sources
 140                                 tileset.blocks=initparams['tileblocks'];//   |
 141                         }                                                                                       //   |
 142                         addChild(tileset);                                                      //   |
 143                         tileset.init(tileparams, false,
 144                                      initparams['background_dim']    ==null ? true  : initparams['background_dim'],
 145                                      initparams['background_sharpen']==null ? false : initparams['background_sharpen']);
 146
 147                         vectorbg = new Sprite();                                        // 1 - vector background layers
 148                         addChild(vectorbg);                                                     //   |
 149
 150                         paint = new MapPaint(this,-5,5);                        // 2 - core paint object
 151                         addChild(paint);                                                        //   |
 152                         paint.isBackground=false;                                       //   |
 153
 154                         if (styleurl) {                                                         // if we've only just set up paint, then setStyle won't have created the RuleSet
 155                                 paint.ruleset=new RuleSet(MINSCALE,MAXSCALE,redraw,redrawPOIs);
 156                                 paint.ruleset.loadFromCSS(styleurl);
 157                         }
 158                         if (startscale>0) {
 159                                 scale=startscale;
 160                                 this.dispatchEvent(new MapEvent(MapEvent.SCALE, {scale:scale}));
 161                         }
 162
 163                         scalefactor=MASTERSCALE/Math.pow(2,13-scale);
 164                         baselon    =startlon          -(mapwidth /2)/scalefactor;
 165                         basey      =lat2latp(startlat)+(mapheight/2)/scalefactor;
 166                         updateCoords(0,0);
 167             this.dispatchEvent(new Event(MapEvent.INITIALISED));
 168                         download();
 169
 170             if (ExternalInterface.available) {
 171               ExternalInterface.addCallback("setPosition", function (lat:Number,lon:Number,zoom:uint):void {
 172                   updateCoordsFromLatLon(lat, lon);
 173                   changeScale(zoom);
 174               });
 175             }
 176         }
 177
 178                 // ------------------------------------------------------------------------------------------
 179                 /** Recalculate co-ordinates from new Flash origin */
 180
 181                 public function updateCoords(tx:Number,ty:Number):void {
 182                         setScrollRectXY(tx,ty);
 183
 184                         edge_t=coord2lat(-ty          );
 185                         edge_b=coord2lat(-ty+mapheight);
 186                         edge_l=coord2lon(-tx          );
 187                         edge_r=coord2lon(-tx+mapwidth );
 188                         setCentre();
 189
 190                         tileset.update();
 191                 }
 192
 193                 /** Move the map to centre on a given latitude/longitude. */
 194                 public function updateCoordsFromLatLon(lat:Number,lon:Number):void {
 195                         var cy:Number=-(lat2coord(lat)-mapheight/2);
 196                         var cx:Number=-(lon2coord(lon)-mapwidth/2);
 197                         updateCoords(cx,cy);
 198                 }
 199
 200                 private function setScrollRectXY(tx:Number,ty:Number):void {
 201                         var w:Number=scrollRect.width;
 202                         var h:Number=scrollRect.height;
 203                         scrollRect=new Rectangle(-tx,-ty,w,h);
 204                 }
 205                 private function setScrollRectSize(width:Number,height:Number):void {
 206                         var sx:Number=scrollRect.x ? scrollRect.x : 0;
 207                         var sy:Number=scrollRect.y ? scrollRect.y : 0;
 208                         scrollRect=new Rectangle(sx,sy,width,height);
 209                 }
 210
 211                 private function getX():Number { return -scrollRect.x; }
 212                 private function getY():Number { return -scrollRect.y; }
 213
 214                 private function setCentre():void {
 215                         centre_lat=coord2lat(-getY()+mapheight/2);
 216                         centre_lon=coord2lon(-getX()+mapwidth/2);
 217                         this.dispatchEvent(new MapEvent(MapEvent.MOVE, {lat:centre_lat, lon:centre_lon, scale:scale, minlon:edge_l, maxlon:edge_r, minlat:edge_b, maxlat:edge_t}));
 218                 }
 219
 220                 /** Sets the offset between the background imagery and the map. */
 221                 public function nudgeBackground(x:Number,y:Number):void {
 222                         this.dispatchEvent(new MapEvent(MapEvent.NUDGE_BACKGROUND, { x: x, y: y }));
 223                 }
 224
 225                 private function moveMap(dx:Number,dy:Number):void {
 226                         updateCoords(getX()+dx,getY()+dy);
 227                         updateEntityUIs(false, false);
 228                         download();
 229                 }
 230
 231                 /** Recentre map at given lat/lon, updating the UI and downloading entities. */
 232                 public function moveMapFromLatLon(lat:Number,lon:Number):void {
 233                         updateCoordsFromLatLon(lat,lon);
 234                         updateEntityUIs(false,false);
 235                         download();
 236                 }
 237
 238                 /** Recentre map at given lat/lon, if that point is currently outside the visible area. */
 239                 public function scrollIfNeeded(lat:Number,lon:Number): void{
 240             if (lat> edge_t || lat < edge_b || lon < edge_l || lon > edge_r) {
 241                 moveMapFromLatLon(lat, lon);
 242             }
 243
 244                 }
 245
 246                 // Co-ordinate conversion functions
 247
 248                 public function latp2coord(a:Number):Number     { return -(a-basey)*scalefactor; }
 249                 public function coord2latp(a:Number):Number     { return a/-scalefactor+basey; }
 250                 public function lon2coord(a:Number):Number      { return (a-baselon)*scalefactor; }
 251                 public function coord2lon(a:Number):Number      { return a/scalefactor+baselon; }
 252
 253                 public function latp2lat(a:Number):Number       { return 180/Math.PI * (2 * Math.atan(Math.exp(a*Math.PI/180)) - Math.PI/2); }
 254                 public function lat2latp(a:Number):Number       { return 180/Math.PI * Math.log(Math.tan(Math.PI/4+a*(Math.PI/180)/2)); }
 255
 256                 public function lat2coord(a:Number):Number      { return -(lat2latp(a)-basey)*scalefactor; }
 257                 public function coord2lat(a:Number):Number      { return latp2lat(a/-scalefactor+basey); }
 258
 259
 260                 // ------------------------------------------------------------------------------------------
 261                 /** Resize map size based on current stage and height */
 262
 263                 public function updateSize(w:uint, h:uint):void {
 264                         mapwidth = w; centre_lon=coord2lon(-getX()+w/2);
 265                         mapheight= h; centre_lat=coord2lat(-getY()+h/2);
 266                         setScrollRectSize(w,h);
 267
 268                         this.dispatchEvent(new MapEvent(MapEvent.RESIZE, {width:w, height:h}));
 269
 270             if ( backdrop != null ) {
 271                 backdrop.width=mapwidth;
 272                 backdrop.height=mapheight;
 273             }
 274             if ( mask != null ) {
 275                 mask.width=mapwidth;
 276                 mask.height=mapheight;
 277             }
 278                 }
 279
 280         /** Download map data. Data is downloaded for the connection and the vector layers, where supported.
 281         * The bounding box for the download is taken from the current map edges.
 282         */
 283                 public function download():void {
 284                         this.dispatchEvent(new MapEvent(MapEvent.DOWNLOAD, {minlon:edge_l, maxlon:edge_r, maxlat:edge_t, minlat:edge_b} ));
 285
 286                         if (edge_l>=bigedge_l && edge_r<=bigedge_r &&
 287                                 edge_b>=bigedge_b && edge_t<=bigedge_t) { return; }     // we have already loaded this area, so ignore
 288                         bigedge_l=edge_l; bigedge_r=edge_r;
 289                         bigedge_b=edge_b; bigedge_t=edge_t;
 290                         if (connection.waycount>1000) {
 291                                 connection.purgeOutside(edge_l,edge_r,edge_t,edge_b);
 292                         }
 293                         connection.loadBbox(edge_l,edge_r,edge_t,edge_b);
 294
 295             // Do the same for vector layers
 296             for each (var layer:VectorLayer in vectorlayers) {
 297               layer.loadBbox(edge_l,edge_r,edge_t,edge_b);
 298             }
 299                 }
 300
 301         private function newWayCreated(event:EntityEvent):void {
 302             var way:Way = event.entity as Way;
 303                         if (!way.loaded || !way.within(edge_l,edge_r,edge_t,edge_b)) { return; }
 304                         paint.createWayUI(way);
 305         }
 306
 307         private function newPOICreated(event:EntityEvent):void {
 308             var node:Node = event.entity as Node;
 309                         if (!node.within(edge_l,edge_r,edge_t,edge_b)) { return; }
 310                         paint.createNodeUI(node);
 311         }
 312
 313                 private function wayRenumbered(event:EntityRenumberedEvent):void {
 314             var way:Way = event.entity as Way;
 315                         paint.renumberWayUI(way,event.oldID);
 316                 }
 317
 318                 private function nodeRenumbered(event:EntityRenumberedEvent):void {
 319             var node:Node = event.entity as Node;
 320                         paint.renumberNodeUI(node,event.oldID);
 321                 }
 322
 323         /** Visually mark an entity as highlighted. */
 324         public function setHighlight(entity:Entity, settings:Object):void {
 325                         if      ( entity is Way  && paint.wayuis[entity.id] ) { paint.wayuis[entity.id].setHighlight(settings);  }
 326                         else if ( entity is Node && paint.nodeuis[entity.id]) { paint.nodeuis[entity.id].setHighlight(settings); }
 327         }
 328
 329         public function setHighlightOnNodes(way:Way, settings:Object):void {
 330                         if (paint.wayuis[way.id]) paint.wayuis[way.id].setHighlightOnNodes(settings);
 331         }
 332
 333                 public function protectWay(way:Way):void {
 334                         if (paint.wayuis[way.id]) paint.wayuis[way.id].protectSprites();
 335                 }
 336
 337                 public function unprotectWay(way:Way):void {
 338                         if (paint.wayuis[way.id]) paint.wayuis[way.id].unprotectSprites();
 339                 }
 340
 341                 public function limitWayDrawing(way:Way,except:Number=NaN,only:Number=NaN):void {
 342                         if (!paint.wayuis[way.id]) return;
 343                         paint.wayuis[way.id].drawExcept=except;
 344                         paint.wayuis[way.id].drawOnly  =only;
 345                         paint.wayuis[way.id].redraw();
 346                 }
 347
 348                 /** Protect Entities and EntityUIs against purging. This prevents the currently selected items
 349                    from being purged even though they're off-screen. */
 350
 351                 public function setPurgable(entities:Array, purgable:Boolean):void {
 352                         for each (var entity:Entity in entities) {
 353                                 entity.locked=!purgable;
 354                                 if ( entity is Way  ) {
 355                                         var way:Way=entity as Way;
 356                                         if (paint.wayuis[way.id]) { paint.wayuis[way.id].purgable=purgable; }
 357                                         for (var i:uint=0; i<way.length; i++) {
 358                                                 var node:Node=way.getNode(i)
 359                                                 node.locked=!purgable;
 360                                                 if (paint.nodeuis[node.id]) { paint.nodeuis[node.id].purgable=purgable; }
 361                                         }
 362                                 } else if ( entity is Node && paint.nodeuis[entity.id]) {
 363                                         paint.nodeuis[entity.id].purgable=purgable;
 364                                 }
 365                         }
 366                 }
 367
 368         // Handle mouse events on ways/nodes
 369         private var mapController:MapController = null;
 370
 371         /** Assign map controller. */
 372         public function setController(controller:MapController):void {
 373             this.mapController = controller;
 374         }
 375
 376         public function entityMouseEvent(event:MouseEvent, entity:Entity):void {
 377             if ( mapController != null )
 378                 mapController.entityMouseEvent(event, entity);
 379
 380         }
 381
 382                 // ------------------------------------------------------------------------------------------
 383                 // Add vector layer
 384
 385                 public function addVectorLayer(layer:VectorLayer):void {
 386                         vectorlayers[layer.name]=layer;
 387                         vectorbg.addChild(layer.paint);
 388                 }
 389
 390                 public function removeVectorLayer(layer:VectorLayer):void {
 391                         if (!layer) return;
 392                         layer.blank();
 393                         vectorbg.removeChild(layer.paint);
 394                         delete vectorlayers[layer.name];
 395                 }
 396
 397                 public function findVectorLayer(name:String):VectorLayer {
 398                         for each (var layer:VectorLayer in vectorlayers) {
 399                                 if (layer.name==name) { return layer; }
 400                         }
 401                         return null;
 402                 }
 403
 404                 // ------------------------------------------------------------------------------------------
 405                 // Redraw all items, zoom in and out
 406
 407                 public function updateEntityUIs(redraw:Boolean,remove:Boolean):void {
 408                         paint.updateEntityUIs(connection.getObjectsByBbox(edge_l, edge_r, edge_t, edge_b), redraw, remove);
 409                         for each (var v:VectorLayer in vectorlayers) {
 410                                 v.paint.updateEntityUIs(v.getObjectsByBbox(edge_l, edge_r, edge_t, edge_b), redraw, remove);
 411                         }
 412                 }
 413                 /** Redraw everything, including in every vector layer. */
 414                 public function redraw():void {
 415                         paint.redraw();
 416                         for each (var v:VectorLayer in vectorlayers) { v.paint.redraw(); }
 417                 }
 418                 /** Redraw POI's, including in every vector layer. */
 419                 public function redrawPOIs():void {
 420                         paint.redrawPOIs();
 421                         for each (var v:VectorLayer in vectorlayers) { v.paint.redrawPOIs(); }
 422                 }
 423
 424                 /** Increase scale. */
 425                 public function zoomIn():void {
 426                         if (scale==MAXSCALE) { return; }
 427                         changeScale(scale+1);
 428                 }
 429
 430                 /** Decrease scale. */
 431                 public function zoomOut():void {
 432                         if (scale==MINSCALE) { return; }
 433                         changeScale(scale-1);
 434                 }
 435
 436                 private function changeScale(newscale:uint):void {
 437                         scale=newscale;
 438                         this.dispatchEvent(new MapEvent(MapEvent.SCALE, {scale:scale}));
 439                         scalefactor=MASTERSCALE/Math.pow(2,13-scale);
 440                         updateCoordsFromLatLon((edge_t+edge_b)/2,(edge_l+edge_r)/2);    // recentre
 441                         tileset.changeScale(scale);
 442                         updateEntityUIs(true,true);
 443                         download();
 444                 }
 445
 446                 /** Switch to new MapCSS. */
 447                 public function setStyle(url:String):void {
 448                         styleurl=url;
 449                         if (paint) {
 450                                 paint.ruleset=new RuleSet(MINSCALE,MAXSCALE,redraw,redrawPOIs);
 451                                 paint.ruleset.loadFromCSS(url);
 452                         }
 453         }
 454
 455                 /** Select a new background imagery. */
 456                 public function setBackground(bg:Object):void {
 457                         tileparams=bg;
 458                         if (tileset) { tileset.init(bg, bg.url!=''); }
 459                 }
 460
 461                 /** Set background dimming on/off. */
 462                 public function setDimming(dim:Boolean):void {
 463                         if (tileset) { tileset.setDimming(dim); }
 464                 }
 465
 466                 /** Return background dimming. */
 467                 public function getDimming():Boolean {
 468                         if (tileset) { return tileset.getDimming(); }
 469                         return true;
 470                 }
 471
 472                 /** Set background sharpening on/off. */
 473                 public function setSharpen(sharpen:Boolean):void {
 474                         if (tileset) { tileset.setSharpen(sharpen); }
 475                 }
 476                 /** Return background sharpening. */
 477                 public function getSharpen():Boolean {
 478                         if (tileset) { return tileset.getSharpen(); }
 479                         return false;
 480                 }
 481
 482                 // ------------------------------------------------------------------------------------------
 483                 // Export (experimental)
 484                 // ** just a bit of fun for now!
 485                 // really needs to take a bbox, and make sure that the image is correctly cropped/resized
 486                 // to that area (will probably require creating a new DisplayObject with a different origin
 487                 // and mask)
 488 /*
 489                 public function export():void {
 490                         trace("size is "+this.width+","+this.height);
 491                         var jpgSource:BitmapData = new BitmapData(800,800); // (this.width, this.height);
 492                         jpgSource.draw(this);
 493                         var jpgEncoder:JPGEncoder = new JPGEncoder(85);
 494                         var jpgStream:ByteArray = jpgEncoder.encode(jpgSource);
 495                         var fileRef:FileReference = new FileReference();
 496 //                      fileRef.save(jpgStream,'map.jpeg');
 497                 }
 498
 499 */
 500
 501                 // ==========================================================================================
 502                 // Events
 503
 504                 // ------------------------------------------------------------------------------------------
 505                 // Mouse events
 506
 507                 /** Should map be allowed to pan? */
 508                 public function set draggable(draggable:Boolean):void {
 509                         _draggable=draggable;
 510                         dragstate=NOT_DRAGGING;
 511                 }
 512
 513                 /** Prepare for being dragged by recording start time and location of mouse. */
 514                 public function mouseDownHandler(event:MouseEvent):void {
 515                         if (!_draggable) { return; }
 516                         dragstate=NOT_MOVED;
 517                         lastxmouse=stage.mouseX; downX=stage.mouseX;
 518                         lastymouse=stage.mouseY; downY=stage.mouseY;
 519                         downTime=new Date().getTime();
 520                 }
 521
 522                 /** Respond to mouse up by possibly moving map. */
 523                 public function mouseUpHandler(event:MouseEvent=null):void {
 524                         if (dragstate==DRAGGING) { moveMap(x,y); }
 525                         dragstate=NOT_DRAGGING;
 526                 }
 527
 528                 /** Respond to mouse movement, dragging the map if tolerance threshold met. */
 529                 public function mouseMoveHandler(event:MouseEvent):void {
 530                         if (!_draggable) { return; }
 531                         if (dragstate==NOT_DRAGGING) {
 532                            this.dispatchEvent(new MapEvent(MapEvent.MOUSE_MOVE, { x: coord2lon(mouseX), y: coord2lat(mouseY) }));
 533                return;
 534             }
 535
 536                         if (dragstate==NOT_MOVED) {
 537                                 if (new Date().getTime()-downTime<300) {
 538                                         if (Math.abs(downX-stage.mouseX)<=TOLERANCE   && Math.abs(downY-stage.mouseY)<=TOLERANCE  ) return;
 539                                 } else {
 540                                         if (Math.abs(downX-stage.mouseX)<=TOLERANCE/2 && Math.abs(downY-stage.mouseY)<=TOLERANCE/2) return;
 541                                 }
 542                                 dragstate=DRAGGING;
 543                         }
 544
 545                         setScrollRectXY(getX()+stage.mouseX-lastxmouse,getY()+stage.mouseY-lastymouse);
 546                         lastxmouse=stage.mouseX; lastymouse=stage.mouseY;
 547                         setCentre();
 548                 }
 549
 550                 // ------------------------------------------------------------------------------------------
 551                 // Do every frame
 552
 553                 private function everyFrame(event:Event):void {
 554                         if (tileset) { tileset.serviceQueue(); }
 555                 }
 556
 557                 // ------------------------------------------------------------------------------------------
 558                 // Miscellaneous events
 559
 560                 /** Respond to cursor movements and zoom in/out.*/
 561                 public function keyUpHandler(event:KeyboardEvent):void {
 562                         if (event.target is TextField) return;                          // not meant for us
 563                         switch (event.keyCode) {
 564                                 case Keyboard.PAGE_UP:  zoomIn(); break;                 // Page Up - zoom in
 565                                 case Keyboard.PAGE_DOWN:        zoomOut(); break;            // Page Down - zoom out
 566                                 case Keyboard.LEFT:     moveMap(mapwidth/2,0); break;        // left cursor
 567                                 case Keyboard.UP:       moveMap(0,mapheight/2); break;           // up cursor
 568                                 case Keyboard.RIGHT:    moveMap(-mapwidth/2,0); break;   // right cursor
 569                                 case Keyboard.DOWN:     moveMap(0,-mapheight/2); break;      // down cursor
 570                         }
 571                 }
 572
 573                 // ------------------------------------------------------------------------------------------
 574                 // Debugging
 575
 576                 public function clearDebug():void {
 577                         if (!Globals.vars.hasOwnProperty('debug')) return;
 578                         Globals.vars.debug.text='';
 579                 }
 580
 581                 public function addDebug(text:String):void {
 582                         trace(text);
 583                         if (!Globals.vars.hasOwnProperty('debug')) return;
 584                         if (!Globals.vars.debug.visible) return;
 585                         Globals.vars.debug.appendText(text+"\n");
 586                         Globals.vars.debug.scrollV=Globals.vars.debug.maxScrollV;
 587                 }
 588
 589         }
 590 }