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                 public var pathlength:Number;                           // length of path
  17                 public var patharea:Number;                                     // area of path
  18                 public var centroid_x:Number;                           // centroid
  19                 public var centroid_y:Number;                           //  |
  20                 public var heading:Array=new Array();           // angle at each node
  21                 public var nameformat:TextFormat;
  22                 private var recalculateDue:Boolean=false;
  23
  24                 private const NODESIZE:uint=6;
  25
  26                 public function WayUI(way:Way, paint:MapPaint) {
  27                         super(way,paint);
  28             entity.addEventListener(Connection.WAY_NODE_ADDED, wayNodeAdded);
  29             entity.addEventListener(Connection.WAY_NODE_REMOVED, wayNodeRemoved);
  30             entity.addEventListener(Connection.WAY_REORDERED, wayReordered);
  31             entity.addEventListener(Connection.WAY_DRAGGED, wayDragged);
  32             attachNodeListeners();
  33             attachRelationListeners();
  34             recalculate();
  35                         redraw();
  36                         redrawMultis();
  37                 }
  38
  39                 public function removeEventListeners():void {
  40                         removeGenericEventListeners();
  41             entity.removeEventListener(Connection.WAY_NODE_ADDED, wayNodeAdded);
  42             entity.removeEventListener(Connection.WAY_NODE_REMOVED, wayNodeRemoved);
  43             entity.removeEventListener(Connection.WAY_REORDERED, wayReordered);
  44             entity.removeEventListener(Connection.WAY_DRAGGED, wayDragged);
  45             for (var i:uint = 0; i < Way(entity).length; i++ ) {
  46                 Way(entity).getNode(i).removeEventListener(Connection.NODE_MOVED, nodeMoved);
  47             }
  48                 }
  49
  50                 private function attachNodeListeners():void {
  51                         var way:Way=entity as Way;
  52             for (var i:uint = 0; i < way.length; i++ ) {
  53                 way.getNode(i).addEventListener(Connection.NODE_MOVED, nodeMoved);
  54             }
  55                 }
  56
  57                 private function wayNodeAdded(event:WayNodeEvent):void {
  58                     event.node.addEventListener(Connection.NODE_MOVED, nodeMoved);
  59             recalculate();
  60                     redraw();
  61                         redrawMultis();
  62                 }
  63
  64                 private function wayNodeRemoved(event:WayNodeEvent):void {
  65                     if (!event.node.hasParent(event.way)) {
  66                                 event.node.removeEventListener(Connection.NODE_MOVED, nodeMoved);
  67                         }
  68                         if (paint.nodeuis[event.node.id]) {
  69                                 paint.nodeuis[event.node.id].redraw();
  70                         }
  71             recalculate();
  72                     redraw();
  73                         redrawMultis();
  74                 }
  75
  76         private function nodeMoved(event:NodeMovedEvent):void {
  77                         recalculate();
  78             redraw();
  79                         redrawMultis();
  80         }
  81         private function wayReordered(event:EntityEvent):void {
  82             redraw();
  83                         redrawMultis();
  84         }
  85                 private function wayDragged(event:WayDraggedEvent):void {
  86                         offsetSprites(event.xDelta,event.yDelta);
  87                 }
  88
  89                 override protected function relationAdded(event:RelationMemberEvent):void {
  90                         super.relationAdded(event);
  91                         redrawMultis();
  92                 }
  93                 override protected function relationRemoved(event:RelationMemberEvent):void {
  94                         super.relationRemoved(event);
  95                         redrawMultis();
  96                 }
  97                 override protected function relationTagChanged(event:TagEvent):void {
  98                         super.relationTagChanged(event);
  99                         redrawMultis();
 100                 }
 101
 102                 override public function suspendRedraw(event:EntityEvent):void {
 103                         super.suspendRedraw(event);
 104                         recalculateDue=false;
 105                 }
 106
 107                 override public function resumeRedraw(event:EntityEvent):void {
 108                         suspended=false;
 109                         if (recalculateDue) { recalculate(); }
 110                         super.resumeRedraw(event);
 111                 }
 112
 113                 public function redrawMultis():void {
 114                         var multis:Array=entity.findParentRelationsOfType('multipolygon','inner');
 115                         for each (var m:Relation in multis) {
 116                                 var outers:Array=m.findMembersByRole('outer');
 117                                 for each (var e:Entity in outers) {
 118                                         if (e is Way && paint.wayuis[e.id]) {
 119                                                 paint.wayuis[e.id].redraw();
 120                                         }
 121                                 }
 122                         }
 123                 }
 124
 125         public function setHighlightOnNodes(settings:Object):void {
 126                         for (var i:uint = 0; i < Way(entity).length; i++) {
 127                 var node:Node = Way(entity).getNode(i);
 128                                 if (paint.nodeuis[node.id]) {
 129                                         paint.nodeuis[node.id].setHighlight(settings);
 130                                         paint.nodeuis[node.id].redraw();
 131                                 }
 132                         }
 133         }
 134
 135                 // ------------------------------------------------------------------------------------------
 136                 // Calculate length etc.
 137                 // ** this could be made scale-independent - would speed up redraw
 138
 139                 public function recalculate():void {
 140                         if (suspended) { recalculateDue=true; return; }
 141
 142                         var lx:Number, ly:Number, sc:Number;
 143                         var node:Node, latp:Number, lon:Number;
 144                         var cx:Number=0, cy:Number=0;
 145                         var way:Way=entity as Way;
 146
 147                         pathlength=0;
 148                         patharea=0;
 149                         if (way.length==0) { return; }
 150
 151                         lx = way.getNode(way.length-1).lon;
 152                         ly = way.getNode(way.length-1).latp;
 153                         for ( var i:uint = 0; i < way.length; i++ ) {
 154                 node = way.getNode(i);
 155                 latp = node.latp;
 156                 lon  = node.lon;
 157
 158                                 // length and area
 159                                 if ( i>0 ) { pathlength += Math.sqrt( Math.pow(lon-lx,2)+Math.pow(latp-ly,2) ); }
 160                                 sc = (lx*latp-lon*ly)*paint.map.scalefactor;
 161                                 cx += (lx+lon)*sc;
 162                                 cy += (ly+latp)*sc;
 163                                 patharea += sc;
 164
 165                                 // heading
 166                                 if (i>0) { heading[i-1]=Math.atan2((lon-lx),(latp-ly)); }
 167
 168                                 lx=lon; ly=latp;
 169                         }
 170                         heading[way.length-1]=heading[way.length-2];
 171
 172                         pathlength*=paint.map.scalefactor;
 173                         patharea/=2;
 174                         if (patharea!=0 && way.isArea()) {
 175                                 centroid_x=paint.map.lon2coord(cx/patharea/6);
 176                                 centroid_y=paint.map.latp2coord(cy/patharea/6);
 177                         } else if (pathlength>0) {
 178                                 var c:Array=pointAt(0.5);
 179                                 centroid_x=c[0];
 180                                 centroid_y=c[1];
 181                         }
 182                 }
 183
 184                 // ------------------------------------------------------------------------------------------
 185                 // Redraw
 186
 187                 override public function doRedraw():Boolean {
 188                         interactive=false;
 189                         removeSprites();
 190                         if (Way(entity).length==0) { return false; }
 191                         if (!paint.ready) { return false; }
 192
 193             // Copy tags object, and add states
 194             var tags:Object = entity.getTagsCopy();
 195                         tags=applyStateClasses(tags);
 196                         if (Way(entity).isArea()) { tags[':area']='yes'; }
 197             if (entity.isUneditedTiger() && Globals.vars.highlightTiger) { tags[':tiger']='yes'; }
 198
 199                         // Which layer?
 200                         layer=0;
 201                         if (tags['layer']) { layer=Math.min(Math.max(tags['layer'],paint.minlayer),paint.maxlayer); }
 202
 203                         // Keep track of maximum stroke width for hitzone
 204                         var maxwidth:Number=4;
 205
 206                         // Create styleList if not already drawn
 207                         if (!styleList || !styleList.isValidAt(paint.map.scale)) {
 208                                 styleList=paint.ruleset.getStyles(entity, tags, paint.map.scale);
 209                         }
 210
 211                         // Iterate through each sublayer, drawing any styles on that layer
 212                         var drawn:Boolean;
 213                         var multis:Array=entity.findParentRelationsOfType('multipolygon','outer');
 214                         var inners:Array=[];
 215                         for each (var m:Relation in multis) {
 216                                 inners=inners.concat(m.findMembersByRole('inner'));
 217                         }
 218
 219                         for each (var sublayer:Number in styleList.sublayers) {
 220                                 if (styleList.shapeStyles[sublayer]) {
 221                                         var s:ShapeStyle=styleList.shapeStyles[sublayer];
 222                                         var stroke:Shape, fill:Shape, casing:Shape, roadname:Sprite;
 223                                         var x0:Number=paint.map.lon2coord(Way(entity).getNode(0).lon);
 224                                         var y0:Number=paint.map.latp2coord(Way(entity).getNode(0).latp);
 225                                         interactive||=s.interactive;
 226
 227                                         // Stroke
 228                                         if (s.width)  {
 229                                                 stroke=new Shape(); addToLayer(stroke,STROKESPRITE,sublayer);
 230                                                 stroke.graphics.moveTo(x0,y0);
 231                                                 s.applyStrokeStyle(stroke.graphics);
 232                                                 if (s.dashes && s.dashes.length>0) {
 233                                                         var segments:Array=dashedLine(stroke.graphics,s.dashes);
 234                                                         if (s.line_style) { lineDecoration(stroke.graphics,s,segments); }
 235                                                 } else { solidLines(stroke.graphics,inners); }
 236                                                 drawn=true;
 237                                                 if (s.interactive) { maxwidth=Math.max(maxwidth,s.width); }
 238                                         }
 239
 240                                         // Fill
 241                                         if ((!isNaN(s.fill_color) || s.fill_image) && entity.findParentRelationsOfType('multipolygon','inner').length==0) {
 242                                                 fill=new Shape(); addToLayer(fill,FILLSPRITE);
 243                                                 fill.graphics.moveTo(x0,y0);
 244                                                 if (s.fill_image) { new WayBitmapFiller(this,fill.graphics,s); }
 245                                                                          else { s.applyFill(fill.graphics); }
 246                                                 solidLines(fill.graphics,inners);
 247                                                 fill.graphics.endFill();
 248                                                 drawn=true;
 249                                         }
 250
 251                                         // Casing
 252                                         if (s.casing_width) {
 253                                                 casing=new Shape(); addToLayer(casing,CASINGSPRITE);
 254                                                 casing.graphics.moveTo(x0,y0);
 255                                                 s.applyCasingStyle(casing.graphics);
 256                                                 if (s.casing_dashes && s.casing_dashes.length>0) { dashedLine(casing.graphics,s.casing_dashes); }
 257                                                                                                                                         else { solidLines(casing.graphics,inners); }
 258                                                 drawn=true;
 259                                                 if (s.interactive) { maxwidth=Math.max(maxwidth,s.casing_width); }
 260                                         }
 261                                 }
 262
 263                                 if (styleList.textStyles[sublayer]) {
 264                                         var t:TextStyle=styleList.textStyles[sublayer];
 265                                         interactive||=t.interactive;
 266                                         roadname=new Sprite(); addToLayer(roadname,NAMESPRITE);
 267                                         nameformat = t.getTextFormat();
 268                                         var a:String=tags[t.text];
 269                                         if (a) {
 270                                                 if (t.font_caps) { a=a.toUpperCase(); }
 271                                                 if (t.text_center && centroid_x) {
 272                                                         t.writeNameLabel(roadname,a,centroid_x,centroid_y);
 273                                                 } else {
 274                                                         writeNameOnPath(roadname,a,t.text_offset ? t.text_offset : 0);
 275                                                 }
 276                                                 if (t.text_halo_radius>0) { roadname.filters=t.getHaloFilter(); }
 277                                         }
 278                                 }
 279
 280                                 // ** ShieldStyle to do
 281                         }
 282
 283                         // Draw icons
 284                         var r:Number;
 285                         var nodeSelected:int=stateClasses["nodeSelected"];
 286                         for (var i:uint = 0; i < Way(entity).length; i++) {
 287                 var node:Node = Way(entity).getNode(i);
 288                                 var nodeStateClasses:Object={};
 289 //                              if (i==0) { nodetags['_heading']= heading[i]; }
 290 //                                   else { nodetags['_heading']=(heading[i]+heading[i-1])/2; }
 291                                 // ** FIXME - heading isn't currently applied
 292                                 nodeStateClasses['junction']=(node.numParentWays>1);
 293                                 paint.createNodeUI(node,r,layer,nodeStateClasses);
 294                         }
 295                         if (!drawn) { return false; }
 296
 297             // create a generic "way" hitzone sprite
 298                         if (interactive && drawn) {
 299                     hitzone = new Sprite();
 300                     hitzone.graphics.lineStyle(maxwidth, 0x000000, 1, false, "normal", CapsStyle.ROUND, JointStyle.ROUND);
 301                     solidLines(hitzone.graphics,[]);
 302                     hitzone.visible = false;
 303                                 setListenSprite();
 304                         }
 305
 306                         return true;
 307                 }
 308
 309                 // ------------------------------------------------------------------------------------------
 310                 // Drawing support functions
 311
 312                 // Draw solid polyline
 313
 314                 public function solidLines(g:Graphics,inners:Array):void {
 315                         solidLine(g,entity as Way);
 316                         for each (var w:Way in inners) { solidLine(g,w); }
 317                 }
 318
 319                 private function solidLine(g:Graphics,w:Way):void {
 320                         if (w.length==0) { return; }
 321             var node:Node = w.getNode(0);
 322                         g.moveTo(paint.map.lon2coord(node.lon), paint.map.latp2coord(node.latp));
 323                         for (var i:uint = 1; i < w.length; i++) {
 324                 node = w.getNode(i);
 325                                 g.lineTo(paint.map.lon2coord(node.lon), paint.map.latp2coord(node.latp));
 326                         }
 327                 }
 328
 329                 // Draw dashed polyline
 330
 331                 private function dashedLine(g:Graphics,dashes:Array):Array {
 332                         var way:Way=entity as Way;
 333                         var segments:Array=[];
 334                         var draw:Boolean=false, dashleft:Number=0, dc:Array=new Array();
 335                         var a:Number, xc:Number, yc:Number;
 336                         var curx:Number, cury:Number;
 337                         var dx:Number, dy:Number, segleft:Number=0;
 338                         var i:int=0;
 339
 340             var node:Node = way.getNode(0);
 341             var nextNode:Node = way.getNode(0);
 342                         g.moveTo(paint.map.lon2coord(node.lon), paint.map.latp2coord(node.latp));
 343                         while (i < way.length-1 || segleft>0) {
 344                                 if (dashleft<=0) {      // should be ==0
 345                                         if (dc.length==0) { dc=dashes.slice(0); }
 346                                         dashleft=dc.shift();
 347                                         if (draw) { segments.push([curx,cury,dx,dy]); }
 348                                         draw=!draw;
 349                                 }
 350                                 if (segleft<=0) {       // should be ==0
 351                     node = way.getNode(i);
 352                     nextNode = way.getNode(i+1);
 353                                         curx=paint.map.lon2coord(node.lon);
 354                     dx=paint.map.lon2coord(nextNode.lon)-curx;
 355                                         cury=paint.map.latp2coord(node.latp);
 356                     dy=paint.map.latp2coord(nextNode.latp)-cury;
 357                                         a=Math.atan2(dy,dx); xc=Math.cos(a); yc=Math.sin(a);
 358                                         segleft=Math.sqrt(dx*dx+dy*dy);
 359                                         i++;
 360                                 }
 361
 362                                 if (segleft<=dashleft) {
 363                                         // the path segment is shorter than the dash
 364                                         curx+=dx; cury+=dy;
 365                                         moveLine(g,curx,cury,draw);
 366                                         dashleft-=segleft; segleft=0;
 367                                 } else {
 368                                         // the path segment is longer than the dash
 369                                         curx+=dashleft*xc; dx-=dashleft*xc;
 370                                         cury+=dashleft*yc; dy-=dashleft*yc;
 371                                         moveLine(g,curx,cury,draw);
 372                                         segleft-=dashleft; dashleft=0;
 373                                 }
 374                         }
 375                         return segments;
 376                 }
 377
 378                 private function moveLine(g:Graphics,x:Number,y:Number,draw:Boolean):void {
 379                         if (draw) { g.lineTo(x,y); }
 380                                  else { g.moveTo(x,y); }
 381                 }
 382
 383                 // Draw decoration (arrows etc.)
 384
 385                 private function lineDecoration(g:Graphics,s:ShapeStyle,segments:Array):void {
 386                         var c:int=s.color ? s.color : 0;
 387                         switch (s.line_style.toLowerCase()) {
 388
 389                                 case 'arrows':
 390                                         var w:Number=s.width*1.5;       // width of arrow
 391                                         var l:Number=s.width*2;         // length of arrow
 392                                         var angle0:Number, angle1:Number, angle2:Number;
 393                                         g.lineStyle(1,c);
 394                                         for each (var seg:Array in segments) {
 395                                                 g.beginFill(c);
 396                                                 angle0= Math.atan2(seg[3],seg[2]);
 397                                                 angle1=-Math.atan2(seg[3],seg[2]);
 398                                                 angle2=-Math.atan2(seg[3],seg[2])-Math.PI;
 399                                                 g.moveTo(seg[0]+l*Math.cos(angle0),
 400                                                          seg[1]+l*Math.sin(angle0));
 401                                                 g.lineTo(seg[0]+w*Math.sin(angle1),
 402                                                          seg[1]+w*Math.cos(angle1));
 403                                                 g.lineTo(seg[0]+w*Math.sin(angle2),
 404                                                          seg[1]+w*Math.cos(angle2));
 405                                                 g.endFill();
 406                                         }
 407                                         break;
 408                                 }
 409                 }
 410
 411
 412                 // Find point partway (0-1) along a path
 413                 // returns (x,y,angle)
 414                 // inspired by senocular's Path.as
 415
 416                 private function pointAt(t:Number):Array {
 417                         var way:Way=entity as Way;
 418                         var totallen:Number = t*pathlength;
 419                         var curlen:Number = 0;
 420                         var dx:Number, dy:Number, seglen:Number;
 421                         for (var i:int = 1; i < way.length; i++){
 422                                 dx=paint.map.lon2coord(way.getNode(i).lon)-paint.map.lon2coord(way.getNode(i-1).lon);
 423                                 dy=paint.map.latp2coord(way.getNode(i).latp)-paint.map.latp2coord(way.getNode(i-1).latp);
 424                                 seglen=Math.sqrt(dx*dx+dy*dy);
 425                                 if (totallen > curlen+seglen) { curlen+=seglen; continue; }
 426                                 return new Array(paint.map.lon2coord(way.getNode(i-1).lon)+(totallen-curlen)/seglen*dx,
 427                                                                  paint.map.latp2coord(way.getNode(i-1).latp)+(totallen-curlen)/seglen*dy,
 428                                                                  Math.atan2(dy,dx));
 429                         }
 430                         return new Array(0, 0, 0);
 431                 }
 432
 433                 // Draw name along path
 434                 // based on code by Tom Carden
 435
 436                 private function writeNameOnPath(s:Sprite,a:String,textOffset:Number=0):void {
 437
 438                         // make a dummy textfield so we can measure its width
 439                         var tf:TextField = new TextField();
 440                         tf.defaultTextFormat = nameformat;
 441                         tf.text = a;
 442                         tf.width = tf.textWidth+4;
 443                         tf.height = tf.textHeight+4;
 444                         if (pathlength<tf.width) { return; }    // no room for text?
 445
 446                         var t1:Number = (pathlength/2 - tf.width/2) / pathlength; var p1:Array=pointAt(t1);
 447                         var t2:Number = (pathlength/2 + tf.width/2) / pathlength; var p2:Array=pointAt(t2);
 448
 449                         var angleOffset:Number; // so we can do a 180º if we're running backwards
 450                         var offsetSign:Number;  // -1 if we're starting at t2
 451                         var tStart:Number;      // t1 or t2
 452
 453                         // make sure text doesn't run right->left or upside down
 454                         if (p1[0] < p2[0] &&
 455                                 p1[2] < Math.PI/2 &&
 456                                 p1[2] > -Math.PI/2) {
 457                                 angleOffset = 0; offsetSign = 1; tStart = t1;
 458                         } else {
 459                                 angleOffset = Math.PI; offsetSign = -1; tStart = t2;
 460                         }
 461
 462                         // make a textfield for each char, centered on the line,
 463                         // using getCharBoundaries to rotate it around its center point
 464                         var chars:Array = a.split('');
 465                         for (var i:int = 0; i < chars.length; i++) {
 466                                 var rect:Rectangle = tf.getCharBoundaries(i);
 467                                 if (rect) {
 468                                         s.addChild(rotatedLetter(chars[i],
 469                                                                                          tStart + offsetSign*(rect.left+rect.width/2)/pathlength,
 470                                                                                          rect.width, tf.height, angleOffset, textOffset));
 471                                 }
 472                         }
 473                 }
 474
 475                 private function rotatedLetter(char:String, t:Number, w:Number, h:Number, a:Number, o:Number):TextField {
 476                         var tf:TextField = new TextField();
 477             tf.mouseEnabled = false;
 478             tf.mouseWheelEnabled = false;
 479                         tf.defaultTextFormat = nameformat;
 480                         tf.embedFonts = true;
 481                         tf.text = char;
 482                         tf.width = tf.textWidth+4;
 483                         tf.height = tf.textHeight+4;
 484
 485                         var p:Array=pointAt(t);
 486                         var matrix:Matrix = new Matrix();
 487                         matrix.translate(-w/2, -h/2-o);
 488                         // ** add (say) -4 to the height to move it up by 4px
 489                         matrix.rotate(p[2]+a);
 490                         matrix.translate(p[0], p[1]);
 491                         tf.transform.matrix = matrix;
 492                         return tf;
 493                 }
 494
 495                 public function getNodeAt(x:Number, y:Number):Node {
 496                         var way:Way=entity as Way;
 497                         for (var i:uint = 0; i < way.length; i++) {
 498                 var node:Node = way.getNode(i);
 499                 var nodeX:Number = paint.map.lon2coord(node.lon);
 500                 var nodeY:Number = paint.map.latp2coord(node.latp);
 501                 if ( nodeX >= x-NODESIZE && nodeX <= x+NODESIZE &&
 502                      nodeY >= y-NODESIZE && nodeY <= y+NODESIZE )
 503                     return node;
 504             }
 505             return null;
 506                 }
 507
 508                 // ------------------------------------------------------------------------------------------
 509                 // Interaction
 510
 511                 public function hitTest(x:Number, y:Number):Way {
 512                         if (hitzone.hitTestPoint(x,y,true)) { return entity as Way; }
 513                         return null;
 514                 }
 515         }
 516 }