net/systemeD/halcyon/WayUI.as

   1 package net.systemeD.halcyon {
   2
   3         import flash.display.*;
   4         import flash.geom.Matrix;
   5         import flash.geom.Point;
   6         import flash.geom.Rectangle;
   7         import flash.text.TextField;
   8         import flash.text.TextFormat;
   9         import flash.events.*;
  10         import net.systemeD.halcyon.styleparser.*;
  11     import net.systemeD.halcyon.connection.*;
  12         import net.systemeD.halcyon.Globals;
  13
  14         public class WayUI extends EntityUI {
  15
  16         private var way:Way;
  17                 public var pathlength:Number;                           // length of path
  18                 public var patharea:Number;                                     // area of path
  19                 public var centroid_x:Number;                           // centroid
  20                 public var centroid_y:Number;                           //  |
  21                 public var heading:Array=new Array();           // angle at each node
  22         private var hitzone:Sprite;
  23                 public var nameformat:TextFormat;
  24
  25                 private const NODESIZE:uint=6;
  26
  27                 public function WayUI(way:Way, map:Map) {
  28                         super();
  29                         this.way = way;
  30                         this.map = map;
  31             init();
  32             way.addEventListener(Connection.TAG_CHANGE, wayTagChanged);
  33             way.addEventListener(Connection.WAY_NODE_ADDED, wayNodeAdded);
  34             way.addEventListener(Connection.WAY_NODE_REMOVED, wayNodeRemoved);
  35             attachNodeListeners();
  36                 }
  37
  38                 private function attachNodeListeners():void {
  39             for (var i:uint = 0; i < way.length; i++ ) {
  40                 way.getNode(i).addEventListener(Connection.NODE_MOVED, nodeMoved);
  41             }
  42                 }
  43
  44                 private function wayNodeAdded(event:WayNodeEvent):void {
  45                     event.node.addEventListener(Connection.NODE_MOVED, nodeMoved);
  46                     redraw();
  47                 }
  48
  49                 private function wayNodeRemoved(event:WayNodeEvent):void {
  50                     event.node.removeEventListener(Connection.NODE_MOVED, nodeMoved);
  51                     redraw();
  52                 }
  53
  54         private function wayTagChanged(event:TagEvent):void {
  55             redraw();
  56         }
  57         private function nodeMoved(event:NodeMovedEvent):void {
  58             redraw();
  59         }
  60
  61                 private function init():void {
  62                         recalculate();
  63                         redraw();
  64                         // updateBbox(lon, lat);
  65                         // ** various other stuff
  66                 }
  67
  68                 // ------------------------------------------------------------------------------------------
  69                 // Calculate length etc.
  70                 // ** this could be made scale-independent - would speed up redraw
  71
  72                 public function recalculate():void {
  73                         var lx:Number, ly:Number, sc:Number;
  74                         var node:Node, latp:Number, lon:Number;
  75                         var cx:Number=0, cy:Number=0;
  76                         pathlength=0;
  77                         patharea=0;
  78
  79                         lx = way.getNode(way.length-1).lon;
  80                         ly = way.getNode(way.length-1).latp;
  81                         for ( var i:uint = 0; i < way.length; i++ ) {
  82                 node = way.getNode(i);
  83                 latp = node.latp;
  84                 lon  = node.lon;
  85
  86                                 // length and area
  87                                 if ( i>0 ) { pathlength += Math.sqrt( Math.pow(lon-lx,2)+Math.pow(latp-ly,2) ); }
  88                                 sc = (lx*latp-lon*ly)*map.scalefactor;
  89                                 cx += (lx+lon)*sc;
  90                                 cy += (ly+latp)*sc;
  91                                 patharea += sc;
  92
  93                                 // heading
  94                                 if (i>0) { heading[i-1]=Math.atan2((lon-lx),(latp-ly)); }
  95
  96                                 lx=lon; ly=latp;
  97                         }
  98                         heading[way.length-1]=heading[way.length-2];
  99
 100                         pathlength*=map.scalefactor;
 101                         patharea/=2;
 102                         if (patharea!=0 && way.isArea()) {
 103                                 centroid_x=map.lon2coord(cx/patharea/6);
 104                                 centroid_y=map.latp2coord(cy/patharea/6);
 105                         } else if (pathlength>0) {
 106                                 var c:Array=pointAt(0.5);
 107                                 centroid_x=c[0];
 108                                 centroid_y=c[1];
 109                         }
 110                 }
 111
 112                 // ------------------------------------------------------------------------------------------
 113                 // Redraw
 114
 115                 public function redraw():void {
 116                         removeSprites();
 117
 118             // Copy tags object, and add states
 119             var tags:Object = way.getTagsCopy();
 120             for (var stateKey:String in stateClasses) {
 121                 tags[":"+stateKey] = 'yes';
 122             }
 123                         if (way.isArea()) { tags[':area']='yes'; }
 124
 125                         // Which layer?
 126                         layer=5;
 127                         if ( tags['layer'] )
 128                 layer=Math.min(Math.max(tags['layer']+5,-5),5)+5;
 129
 130                         // Iterate through each sublayer, drawing any styles on that layer
 131                         var sl:StyleList=map.ruleset.getStyles(this.way, tags);
 132                         var drawn:Boolean;
 133                         for (var sublayer:int=10; sublayer>=0; sublayer--) {
 134                                 if (sl.shapeStyles[sublayer]) {
 135                                         var s:ShapeStyle=sl.shapeStyles[sublayer];
 136                                         var stroke:Shape, fill:Shape, casing:Shape, roadname:Sprite;
 137                                         var x0:Number=map.lon2coord(way.getNode(0).lon);
 138                                         var y0:Number=map.latp2coord(way.getNode(0).latp);
 139
 140                                         // Stroke
 141                                         if (s.width)  {
 142                                                 stroke=new Shape(); addToLayer(stroke,STROKESPRITE,sublayer);
 143                                                 stroke.graphics.moveTo(x0,y0);
 144                                                 s.applyStrokeStyle(stroke.graphics);
 145                                                 if (s.dashes && s.dashes.length>0) { dashedLine(stroke.graphics,s.dashes); }
 146                                                                                                           else { solidLine(stroke.graphics); }
 147                                                 drawn=true;
 148                                         }
 149
 150                                         // Fill
 151                                         if (s.fill_color || s.fill_image) {
 152                                                 fill=new Shape(); addToLayer(fill,FILLSPRITE);
 153                                                 fill.graphics.moveTo(x0,y0);
 154                                                 if (s.fill_image) { new WayBitmapFiller(this,fill.graphics,s); }
 155                                                                          else { s.applyFill(fill.graphics); }
 156                                                 solidLine(fill.graphics);
 157                                                 fill.graphics.endFill();
 158                                                 drawn=true;
 159                                         }
 160
 161                                         // Casing
 162                                         if (s.casing_width) {
 163                                                 casing=new Shape(); addToLayer(casing,CASINGSPRITE);
 164                                                 casing.graphics.moveTo(x0,y0);
 165                                                 s.applyCasingStyle(casing.graphics);
 166                                                 if (s.casing_dashes && s.casing_dashes.length>0) { dashedLine(casing.graphics,s.casing_dashes); }
 167                                                                                                                                         else { solidLine(casing.graphics); }
 168                                                 drawn=true;
 169                                         }
 170                                 }
 171
 172                                 if (sl.textStyles[sublayer]) {
 173                                         var t:TextStyle=sl.textStyles[sublayer];
 174                                         roadname=new Sprite(); addToLayer(roadname,NAMESPRITE);
 175                                         nameformat = t.getTextFormat();
 176                                         var a:String=tags[t.text];
 177                                         if (a) {
 178                                                 if (t.font_caps) { a=a.toUpperCase(); }
 179                                                 if (t.text_center && centroid_x) {
 180                                                         t.writeNameLabel(roadname,a,centroid_x,centroid_y);
 181                                                 } else {
 182                                                         writeNameOnPath(roadname,a,t.text_offset ? t.text_offset : 0);
 183                                                 }
 184                                                 if (t.text_halo_radius>0) { roadname.filters=t.getHaloFilter(); }
 185                                         }
 186                                 }
 187
 188                                 // ** ShieldStyle to do
 189                         }
 190
 191                         // Draw icons
 192                         // ** there should be huge potential to optimise this - at present we're
 193                         //    running getStyles for every node in the way on every redraw
 194                         var r:Number;
 195                         var nodetags:Object;
 196                         var highlight:Boolean=stateClasses["showNodes"]; // !=null
 197                         for (var i:uint = 0; i < way.length; i++) {
 198                 var node:Node = way.getNode(i);
 199                                 nodetags=node.getTagsCopy();
 200                                 if (i==0) { nodetags['_heading']= heading[i]; }
 201                                      else { nodetags['_heading']=(heading[i]+heading[i-1])/2; }
 202                                 if (highlight) { nodetags[':selectedway']='yes'; }
 203                                 sl=map.ruleset.getStyles(node,nodetags);
 204                                 if (sl.hasStyles()) {
 205                                         if (!map.pois[node.id]) { map.pois[node.id]=new NodeUI(node,map,r); }
 206                                         map.pois[node.id].redraw(sl);
 207                                         // ** this should be done via the registerPOI/event listener mechanism,
 208                                         //    but that needs a bit of reworking so we can pass in a styleList
 209                                         //    (otherwise we end up computing the styles twice which is expensive)
 210                                 } else if (map.pois[node.id]) {
 211                                         map.pois[node.id].removeSprites();
 212                                 }
 213                         }
 214                         if (!drawn) { return; }
 215
 216             // create a generic "way" hitzone sprite
 217             hitzone = new Sprite();
 218             hitzone.graphics.lineStyle(4, 0x000000, 1, false, "normal", CapsStyle.ROUND, JointStyle.ROUND);
 219             solidLine(hitzone.graphics);
 220             addToLayer(hitzone, CLICKSPRITE);
 221             hitzone.visible = false;
 222                         createListenSprite(hitzone);
 223
 224                 }
 225
 226                 // ------------------------------------------------------------------------------------------
 227                 // Drawing support functions
 228
 229                 private function drawNodes(g:Graphics):void {
 230 // ***** these should be discreet anchorpoints (NodeUI?), not just sprites
 231 //          g.lineStyle(1, 0xff0000, 1, false, "normal", CapsStyle.ROUND, JointStyle.ROUND);
 232                         g.beginFill(0xFF0000);
 233                         for (var i:uint = 0; i < way.length; i++) {
 234                 var node:Node = way.getNode(i);
 235                 var x:Number = map.lon2coord(node.lon);
 236                 var y:Number = map.latp2coord(node.latp);
 237                 g.moveTo(x-NODESIZE, y-NODESIZE);
 238                 g.lineTo(x+NODESIZE, y-NODESIZE);
 239                 g.lineTo(x+NODESIZE, y+NODESIZE);
 240                 g.lineTo(x-NODESIZE, y+NODESIZE);
 241                 g.lineTo(x-NODESIZE, y-NODESIZE);
 242                         }
 243                 }
 244
 245                 // Draw solid polyline
 246
 247                 public function solidLine(g:Graphics):void {
 248             var node:Node = way.getNode(0);
 249                         g.moveTo(map.lon2coord(node.lon), map.latp2coord(node.latp));
 250                         for (var i:uint = 1; i < way.length; i++) {
 251                 node = way.getNode(i);
 252                                 g.lineTo(map.lon2coord(node.lon), map.latp2coord(node.latp));
 253                         }
 254                 }
 255
 256                 // Draw dashed polyline
 257
 258                 private function dashedLine(g:Graphics,dashes:Array):void {
 259                         var draw:Boolean=false, dashleft:Number=0, dc:Array=new Array();
 260                         var a:Number, xc:Number, yc:Number;
 261                         var curx:Number, cury:Number;
 262                         var dx:Number, dy:Number, segleft:Number=0;
 263                         var i:int=0;
 264
 265             var node:Node = way.getNode(0);
 266             var nextNode:Node = way.getNode(0);
 267                         g.moveTo(map.lon2coord(node.lon), map.latp2coord(node.latp));
 268                         while (i < way.length-1 || segleft>0) {
 269                                 if (dashleft<=0) {      // should be ==0
 270                                         if (dc.length==0) { dc=dashes.slice(0); }
 271                                         dashleft=dc.shift();
 272                                         draw=!draw;
 273                                 }
 274                                 if (segleft<=0) {       // should be ==0
 275                     node = way.getNode(i);
 276                     nextNode = way.getNode(i+1);
 277                                         curx=map.lon2coord(node.lon);
 278                     dx=map.lon2coord(nextNode.lon)-curx;
 279                                         cury=map.latp2coord(node.latp);
 280                     dy=map.latp2coord(nextNode.latp)-cury;
 281                                         a=Math.atan2(dy,dx); xc=Math.cos(a); yc=Math.sin(a);
 282                                         segleft=Math.sqrt(dx*dx+dy*dy);
 283                                         i++;
 284                                 }
 285
 286                                 if (segleft<=dashleft) {
 287                                         // the path segment is shorter than the dash
 288                                         curx+=dx; cury+=dy;
 289                                         moveLine(g,curx,cury,draw);
 290                                         dashleft-=segleft; segleft=0;
 291                                 } else {
 292                                         // the path segment is longer than the dash
 293                                         curx+=dashleft*xc; dx-=dashleft*xc;
 294                                         cury+=dashleft*yc; dy-=dashleft*yc;
 295                                         moveLine(g,curx,cury,draw);
 296                                         segleft-=dashleft; dashleft=0;
 297                                 }
 298                         }
 299                 }
 300
 301                 private function moveLine(g:Graphics,x:Number,y:Number,draw:Boolean):void {
 302                         if (draw) { g.lineTo(x,y); }
 303                                  else { g.moveTo(x,y); }
 304                 }
 305
 306
 307                 // Find point partway (0-1) along a path
 308                 // returns (x,y,angle)
 309                 // inspired by senocular's Path.as
 310
 311                 private function pointAt(t:Number):Array {
 312                         var totallen:Number = t*pathlength;
 313                         var curlen:Number = 0;
 314                         var dx:Number, dy:Number, seglen:Number;
 315                         for (var i:int = 1; i < way.length; i++){
 316                                 dx=map.lon2coord(way.getNode(i).lon)-map.lon2coord(way.getNode(i-1).lon);
 317                                 dy=map.latp2coord(way.getNode(i).latp)-map.latp2coord(way.getNode(i-1).latp);
 318                                 seglen=Math.sqrt(dx*dx+dy*dy);
 319                                 if (totallen > curlen+seglen) { curlen+=seglen; continue; }
 320                                 return new Array(map.lon2coord(way.getNode(i-1).lon)+(totallen-curlen)/seglen*dx,
 321                                                                  map.latp2coord(way.getNode(i-1).latp)+(totallen-curlen)/seglen*dy,
 322                                                                  Math.atan2(dy,dx));
 323                         }
 324                         return new Array(0, 0, 0);
 325                 }
 326
 327                 // Draw name along path
 328                 // based on code by Tom Carden
 329
 330                 private function writeNameOnPath(s:Sprite,a:String,textOffset:Number=0):void {
 331
 332                         // make a dummy textfield so we can measure its width
 333                         var tf:TextField = new TextField();
 334                         tf.defaultTextFormat = nameformat;
 335                         tf.text = a;
 336                         tf.width = tf.textWidth+4;
 337                         tf.height = tf.textHeight+4;
 338                         if (pathlength<tf.width) { return; }    // no room for text?
 339
 340                         var t1:Number = (pathlength/2 - tf.width/2) / pathlength; var p1:Array=pointAt(t1);
 341                         var t2:Number = (pathlength/2 + tf.width/2) / pathlength; var p2:Array=pointAt(t2);
 342
 343                         var angleOffset:Number; // so we can do a 180º if we're running backwards
 344                         var offsetSign:Number;  // -1 if we're starting at t2
 345                         var tStart:Number;      // t1 or t2
 346
 347                         // make sure text doesn't run right->left or upside down
 348                         if (p1[0] < p2[0] &&
 349                                 p1[2] < Math.PI/2 &&
 350                                 p1[2] > -Math.PI/2) {
 351                                 angleOffset = 0; offsetSign = 1; tStart = t1;
 352                         } else {
 353                                 angleOffset = Math.PI; offsetSign = -1; tStart = t2;
 354                         }
 355
 356                         // make a textfield for each char, centered on the line,
 357                         // using getCharBoundaries to rotate it around its center point
 358                         var chars:Array = a.split('');
 359                         for (var i:int = 0; i < chars.length; i++) {
 360                                 var rect:Rectangle = tf.getCharBoundaries(i);
 361                                 if (rect) {
 362                                         s.addChild(rotatedLetter(chars[i],
 363                                                                                          tStart + offsetSign*(rect.left+rect.width/2)/pathlength,
 364                                                                                          rect.width, tf.height, angleOffset, textOffset));
 365                                 }
 366                         }
 367                 }
 368
 369                 private function rotatedLetter(char:String, t:Number, w:Number, h:Number, a:Number, o:Number):TextField {
 370                         var tf:TextField = new TextField();
 371             tf.mouseEnabled = false;
 372             tf.mouseWheelEnabled = false;
 373                         tf.defaultTextFormat = nameformat;
 374                         tf.embedFonts = true;
 375                         tf.text = char;
 376                         tf.width = tf.textWidth+4;
 377                         tf.height = tf.textHeight+4;
 378
 379                         var p:Array=pointAt(t);
 380                         var matrix:Matrix = new Matrix();
 381                         matrix.translate(-w/2, -h/2-o);
 382                         // ** add (say) -4 to the height to move it up by 4px
 383                         matrix.rotate(p[2]+a);
 384                         matrix.translate(p[0], p[1]);
 385                         tf.transform.matrix = matrix;
 386                         return tf;
 387                 }
 388
 389                 public function getNodeAt(x:Number, y:Number):Node {
 390                         for (var i:uint = 0; i < way.length; i++) {
 391                 var node:Node = way.getNode(i);
 392                 var nodeX:Number = map.lon2coord(node.lon);
 393                 var nodeY:Number = map.latp2coord(node.latp);
 394                 if ( nodeX >= x-NODESIZE && nodeX <= x+NODESIZE &&
 395                      nodeY >= y-NODESIZE && nodeY <= y+NODESIZE )
 396                     return node;
 397             }
 398             return null;
 399                 }
 400
 401         override protected function mouseEvent(event:MouseEvent):void {
 402             var node:Node = getNodeAt(event.localX, event.localY);
 403             if ( node == null )
 404                 map.entityMouseEvent(event, way);
 405             else
 406                 map.entityMouseEvent(event, node);
 407         }
 408
 409         }
 410 }