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, paint:MapPaint, interactive:Boolean=true) {
  28                         super();
  29                         this.way = way;
  30                         this.paint = paint;
  31                         this.ruleset = ruleset;
  32                         this.interactive = interactive;
  33             init();
  34             way.addEventListener(Connection.TAG_CHANGED, wayTagChanged);
  35             way.addEventListener(Connection.WAY_NODE_ADDED, wayNodeAdded);
  36             way.addEventListener(Connection.WAY_NODE_REMOVED, wayNodeRemoved);
  37                         way.addEventListener(Connection.WAY_DELETED, wayDeleted);
  38                         way.addEventListener(Connection.ADDED_TO_RELATION, wayRelationAdded);
  39                         way.addEventListener(Connection.REMOVED_FROM_RELATION, wayRelationRemoved);
  40                         way.addEventListener(Connection.SUSPEND_REDRAW, suspendRedraw);
  41                         way.addEventListener(Connection.RESUME_REDRAW, resumeRedraw);
  42             attachNodeListeners();
  43             attachRelationListeners();
  44                 }
  45
  46                 private function attachNodeListeners():void {
  47             for (var i:uint = 0; i < way.length; i++ ) {
  48                 way.getNode(i).addEventListener(Connection.NODE_MOVED, nodeMoved);
  49             }
  50                 }
  51
  52                 private function attachRelationListeners():void {
  53                     var relations:Array = way.parentRelations;
  54             for each(var relation:Relation in relations ) {
  55                 relation.addEventListener(Connection.TAG_CHANGED, relationTagChanged);
  56             }
  57                 }
  58
  59                 private function wayRelationAdded(event:RelationMemberEvent):void {
  60                     event.relation.addEventListener(Connection.TAG_CHANGED, relationTagChanged);
  61                     redraw();
  62                 }
  63
  64                 private function wayRelationRemoved(event:RelationMemberEvent):void {
  65                     event.relation.removeEventListener(Connection.TAG_CHANGED, relationTagChanged);
  66                     redraw();
  67                 }
  68
  69                 private function wayNodeAdded(event:WayNodeEvent):void {
  70                     event.node.addEventListener(Connection.NODE_MOVED, nodeMoved);
  71                     redraw();
  72                 }
  73
  74                 private function wayNodeRemoved(event:WayNodeEvent):void {
  75                     event.node.removeEventListener(Connection.NODE_MOVED, nodeMoved);
  76                     redraw();
  77                 }
  78
  79         private function wayTagChanged(event:TagEvent):void {
  80             redraw();
  81         }
  82         private function relationTagChanged(event:TagEvent):void {
  83             redraw();
  84         }
  85         private function nodeMoved(event:NodeMovedEvent):void {
  86             redraw();
  87         }
  88                 private function wayDeleted(event:EntityEvent):void {
  89                         redraw();
  90                 }
  91
  92                 private function init():void {
  93                         recalculate();
  94                         redraw();
  95                         // updateBbox(lon, lat);
  96                         // ** various other stuff
  97                 }
  98
  99                 // ------------------------------------------------------------------------------------------
 100                 // Calculate length etc.
 101                 // ** this could be made scale-independent - would speed up redraw
 102
 103                 public function recalculate():void {
 104                         var lx:Number, ly:Number, sc:Number;
 105                         var node:Node, latp:Number, lon:Number;
 106                         var cx:Number=0, cy:Number=0;
 107                         pathlength=0;
 108                         patharea=0;
 109                         if (way.length==0) { return; }
 110
 111                         lx = way.getNode(way.length-1).lon;
 112                         ly = way.getNode(way.length-1).latp;
 113                         for ( var i:uint = 0; i < way.length; i++ ) {
 114                 node = way.getNode(i);
 115                 latp = node.latp;
 116                 lon  = node.lon;
 117
 118                                 // length and area
 119                                 if ( i>0 ) { pathlength += Math.sqrt( Math.pow(lon-lx,2)+Math.pow(latp-ly,2) ); }
 120                                 sc = (lx*latp-lon*ly)*paint.map.scalefactor;
 121                                 cx += (lx+lon)*sc;
 122                                 cy += (ly+latp)*sc;
 123                                 patharea += sc;
 124
 125                                 // heading
 126                                 if (i>0) { heading[i-1]=Math.atan2((lon-lx),(latp-ly)); }
 127
 128                                 lx=lon; ly=latp;
 129                         }
 130                         heading[way.length-1]=heading[way.length-2];
 131
 132                         pathlength*=paint.map.scalefactor;
 133                         patharea/=2;
 134                         if (patharea!=0 && way.isArea()) {
 135                                 centroid_x=paint.map.lon2coord(cx/patharea/6);
 136                                 centroid_y=paint.map.latp2coord(cy/patharea/6);
 137                         } else if (pathlength>0) {
 138                                 var c:Array=pointAt(0.5);
 139                                 centroid_x=c[0];
 140                                 centroid_y=c[1];
 141                         }
 142                 }
 143
 144                 // ------------------------------------------------------------------------------------------
 145                 // Redraw
 146
 147                 override public function doRedraw(sl:StyleList):Boolean {
 148                         removeSprites();
 149                         if (way.length==0) { return false; }
 150                         if (!paint.ready) { return false; }
 151
 152             // Copy tags object, and add states
 153             var tags:Object = way.getTagsCopy();
 154                         tags=applyStateClasses(tags);
 155                         if (way.isArea()) { tags[':area']='yes'; }
 156
 157                         // Which layer?
 158                         layer=0;
 159                         if (tags['layer']) { layer=Math.min(Math.max(tags['layer'],paint.minlayer),paint.maxlayer); }
 160
 161                         // Iterate through each sublayer, drawing any styles on that layer
 162                         if (!sl) { sl=paint.ruleset.getStyles(this.way, tags); }
 163                         var drawn:Boolean;
 164                         for (var sublayer:int=10; sublayer>=0; sublayer--) {
 165                                 if (sl.shapeStyles[sublayer]) {
 166                                         var s:ShapeStyle=sl.shapeStyles[sublayer];
 167                                         var stroke:Shape, fill:Shape, casing:Shape, roadname:Sprite;
 168                                         var x0:Number=paint.map.lon2coord(way.getNode(0).lon);
 169                                         var y0:Number=paint.map.latp2coord(way.getNode(0).latp);
 170
 171                                         // Stroke
 172                                         if (s.width)  {
 173                                                 stroke=new Shape(); addToLayer(stroke,STROKESPRITE,sublayer);
 174                                                 stroke.graphics.moveTo(x0,y0);
 175                                                 s.applyStrokeStyle(stroke.graphics);
 176                                                 if (s.dashes && s.dashes.length>0) {
 177                                                         var segments:Array=dashedLine(stroke.graphics,s.dashes);
 178                                                         if (s.line_style) { lineDecoration(stroke.graphics,s,segments); }
 179                                                 } else { solidLine(stroke.graphics); }
 180                                                 drawn=true;
 181                                         }
 182
 183                                         // Fill
 184                                         if (s.fill_color || s.fill_image) {
 185                                                 fill=new Shape(); addToLayer(fill,FILLSPRITE);
 186                                                 fill.graphics.moveTo(x0,y0);
 187                                                 if (s.fill_image) { new WayBitmapFiller(this,fill.graphics,s); }
 188                                                                          else { s.applyFill(fill.graphics); }
 189                                                 solidLine(fill.graphics);
 190                                                 fill.graphics.endFill();
 191                                                 drawn=true;
 192                                         }
 193
 194                                         // Casing
 195                                         if (s.casing_width) {
 196                                                 casing=new Shape(); addToLayer(casing,CASINGSPRITE);
 197                                                 casing.graphics.moveTo(x0,y0);
 198                                                 s.applyCasingStyle(casing.graphics);
 199                                                 if (s.casing_dashes && s.casing_dashes.length>0) { dashedLine(casing.graphics,s.casing_dashes); }
 200                                                                                                                                         else { solidLine(casing.graphics); }
 201                                                 drawn=true;
 202                                         }
 203                                 }
 204
 205                                 if (sl.textStyles[sublayer]) {
 206                                         var t:TextStyle=sl.textStyles[sublayer];
 207                                         roadname=new Sprite(); addToLayer(roadname,NAMESPRITE);
 208                                         nameformat = t.getTextFormat();
 209                                         var a:String=tags[t.text];
 210                                         if (a) {
 211                                                 if (t.font_caps) { a=a.toUpperCase(); }
 212                                                 if (t.text_center && centroid_x) {
 213                                                         t.writeNameLabel(roadname,a,centroid_x,centroid_y);
 214                                                 } else {
 215                                                         writeNameOnPath(roadname,a,t.text_offset ? t.text_offset : 0);
 216                                                 }
 217                                                 if (t.text_halo_radius>0) { roadname.filters=t.getHaloFilter(); }
 218                                         }
 219                                 }
 220
 221                                 // ** ShieldStyle to do
 222                         }
 223
 224                         // Draw icons
 225                         // ** there should be huge potential to optimise this - at present we're
 226                         //    running getStyles for every node in the way on every redraw
 227                         // ** fix r/heading behaviour - that doesn't look right
 228                         var r:Number;
 229                         var nodetags:Object;
 230                         var nodeSelected:int=stateClasses["nodeSelected"];
 231                         for (var i:uint = 0; i < way.length; i++) {
 232                 var node:Node = way.getNode(i);
 233                                 nodetags=node.getTagsCopy();
 234                                 if (i==0) { nodetags['_heading']= heading[i]; }
 235                                      else { nodetags['_heading']=(heading[i]+heading[i-1])/2; }
 236                                 if (stateClasses["showNodes"]) { nodetags[':selectedway']='yes'; }
 237                                 if (stateClasses["showNodesHover"]) { nodetags[':hoverway']='yes'; }
 238                                 if (node.id==nodeSelected) { nodetags[':selected']='yes'; }
 239                                 if (node.numParentWays>1) { nodetags[':junction']='yes'; }
 240                                 sl=paint.ruleset.getStyles(node,nodetags);
 241                                 if (sl.hasStyles()) {
 242                                         if (!paint.nodeuis[node.id]) {
 243                                                 paint.nodeuis[node.id]=new NodeUI(node,paint,r);
 244                                         }
 245                                         paint.nodeuis[node.id].redraw(sl);
 246                                 } else if (paint.nodeuis[node.id]) {
 247                                         paint.nodeuis[node.id].removeSprites();
 248                                         delete paint.nodeuis[node.id];
 249                                 }
 250                         }
 251                         if (!drawn) { return false; }
 252
 253             // create a generic "way" hitzone sprite
 254             hitzone = new Sprite();
 255             hitzone.graphics.lineStyle(4, 0x000000, 1, false, "normal", CapsStyle.ROUND, JointStyle.ROUND);
 256             solidLine(hitzone.graphics);
 257             addToLayer(hitzone, CLICKSPRITE);
 258             hitzone.visible = false;
 259                         setListenSprite(hitzone);
 260
 261                         return true;
 262                 }
 263
 264                 // ------------------------------------------------------------------------------------------
 265                 // Drawing support functions
 266
 267                 // Draw solid polyline
 268
 269                 public function solidLine(g:Graphics):void {
 270             var node:Node = way.getNode(0);
 271                         g.moveTo(paint.map.lon2coord(node.lon), paint.map.latp2coord(node.latp));
 272                         for (var i:uint = 1; i < way.length; i++) {
 273                 node = way.getNode(i);
 274                                 g.lineTo(paint.map.lon2coord(node.lon), paint.map.latp2coord(node.latp));
 275                         }
 276                 }
 277
 278                 // Draw dashed polyline
 279
 280                 private function dashedLine(g:Graphics,dashes:Array):Array {
 281                         var segments:Array=[];
 282                         var draw:Boolean=false, dashleft:Number=0, dc:Array=new Array();
 283                         var a:Number, xc:Number, yc:Number;
 284                         var curx:Number, cury:Number;
 285                         var dx:Number, dy:Number, segleft:Number=0;
 286                         var i:int=0;
 287
 288             var node:Node = way.getNode(0);
 289             var nextNode:Node = way.getNode(0);
 290                         g.moveTo(paint.map.lon2coord(node.lon), paint.map.latp2coord(node.latp));
 291                         while (i < way.length-1 || segleft>0) {
 292                                 if (dashleft<=0) {      // should be ==0
 293                                         if (dc.length==0) { dc=dashes.slice(0); }
 294                                         dashleft=dc.shift();
 295                                         if (draw) { segments.push([curx,cury,dx,dy]); }
 296                                         draw=!draw;
 297                                 }
 298                                 if (segleft<=0) {       // should be ==0
 299                     node = way.getNode(i);
 300                     nextNode = way.getNode(i+1);
 301                                         curx=paint.map.lon2coord(node.lon);
 302                     dx=paint.map.lon2coord(nextNode.lon)-curx;
 303                                         cury=paint.map.latp2coord(node.latp);
 304                     dy=paint.map.latp2coord(nextNode.latp)-cury;
 305                                         a=Math.atan2(dy,dx); xc=Math.cos(a); yc=Math.sin(a);
 306                                         segleft=Math.sqrt(dx*dx+dy*dy);
 307                                         i++;
 308                                 }
 309
 310                                 if (segleft<=dashleft) {
 311                                         // the path segment is shorter than the dash
 312                                         curx+=dx; cury+=dy;
 313                                         moveLine(g,curx,cury,draw);
 314                                         dashleft-=segleft; segleft=0;
 315                                 } else {
 316                                         // the path segment is longer than the dash
 317                                         curx+=dashleft*xc; dx-=dashleft*xc;
 318                                         cury+=dashleft*yc; dy-=dashleft*yc;
 319                                         moveLine(g,curx,cury,draw);
 320                                         segleft-=dashleft; dashleft=0;
 321                                 }
 322                         }
 323                         return segments;
 324                 }
 325
 326                 private function moveLine(g:Graphics,x:Number,y:Number,draw:Boolean):void {
 327                         if (draw) { g.lineTo(x,y); }
 328                                  else { g.moveTo(x,y); }
 329                 }
 330
 331                 // Draw decoration (arrows etc.)
 332
 333                 private function lineDecoration(g:Graphics,s:ShapeStyle,segments:Array):void {
 334                         var c:int=s.color ? s.color : 0;
 335                         switch (s.line_style.toLowerCase()) {
 336
 337                                 case 'arrows':
 338                                         var w:Number=s.width*1.5;       // width of arrow
 339                                         var l:Number=s.width*2;         // length of arrow
 340                                         var angle0:Number, angle1:Number, angle2:Number;
 341                                         g.lineStyle(1,c);
 342                                         for each (var seg:Array in segments) {
 343                                                 g.beginFill(c);
 344                                                 angle0= Math.atan2(seg[3],seg[2]);
 345                                                 angle1=-Math.atan2(seg[3],seg[2]);
 346                                                 angle2=-Math.atan2(seg[3],seg[2])-Math.PI;
 347                                                 g.moveTo(seg[0]+l*Math.cos(angle0),
 348                                                          seg[1]+l*Math.sin(angle0));
 349                                                 g.lineTo(seg[0]+w*Math.sin(angle1),
 350                                                          seg[1]+w*Math.cos(angle1));
 351                                                 g.lineTo(seg[0]+w*Math.sin(angle2),
 352                                                          seg[1]+w*Math.cos(angle2));
 353                                                 g.endFill();
 354                                         }
 355                                         break;
 356                                 }
 357                 }
 358
 359
 360                 // Find point partway (0-1) along a path
 361                 // returns (x,y,angle)
 362                 // inspired by senocular's Path.as
 363
 364                 private function pointAt(t:Number):Array {
 365                         var totallen:Number = t*pathlength;
 366                         var curlen:Number = 0;
 367                         var dx:Number, dy:Number, seglen:Number;
 368                         for (var i:int = 1; i < way.length; i++){
 369                                 dx=paint.map.lon2coord(way.getNode(i).lon)-paint.map.lon2coord(way.getNode(i-1).lon);
 370                                 dy=paint.map.latp2coord(way.getNode(i).latp)-paint.map.latp2coord(way.getNode(i-1).latp);
 371                                 seglen=Math.sqrt(dx*dx+dy*dy);
 372                                 if (totallen > curlen+seglen) { curlen+=seglen; continue; }
 373                                 return new Array(paint.map.lon2coord(way.getNode(i-1).lon)+(totallen-curlen)/seglen*dx,
 374                                                                  paint.map.latp2coord(way.getNode(i-1).latp)+(totallen-curlen)/seglen*dy,
 375                                                                  Math.atan2(dy,dx));
 376                         }
 377                         return new Array(0, 0, 0);
 378                 }
 379
 380                 // Draw name along path
 381                 // based on code by Tom Carden
 382
 383                 private function writeNameOnPath(s:Sprite,a:String,textOffset:Number=0):void {
 384
 385                         // make a dummy textfield so we can measure its width
 386                         var tf:TextField = new TextField();
 387                         tf.defaultTextFormat = nameformat;
 388                         tf.text = a;
 389                         tf.width = tf.textWidth+4;
 390                         tf.height = tf.textHeight+4;
 391                         if (pathlength<tf.width) { return; }    // no room for text?
 392
 393                         var t1:Number = (pathlength/2 - tf.width/2) / pathlength; var p1:Array=pointAt(t1);
 394                         var t2:Number = (pathlength/2 + tf.width/2) / pathlength; var p2:Array=pointAt(t2);
 395
 396                         var angleOffset:Number; // so we can do a 180º if we're running backwards
 397                         var offsetSign:Number;  // -1 if we're starting at t2
 398                         var tStart:Number;      // t1 or t2
 399
 400                         // make sure text doesn't run right->left or upside down
 401                         if (p1[0] < p2[0] &&
 402                                 p1[2] < Math.PI/2 &&
 403                                 p1[2] > -Math.PI/2) {
 404                                 angleOffset = 0; offsetSign = 1; tStart = t1;
 405                         } else {
 406                                 angleOffset = Math.PI; offsetSign = -1; tStart = t2;
 407                         }
 408
 409                         // make a textfield for each char, centered on the line,
 410                         // using getCharBoundaries to rotate it around its center point
 411                         var chars:Array = a.split('');
 412                         for (var i:int = 0; i < chars.length; i++) {
 413                                 var rect:Rectangle = tf.getCharBoundaries(i);
 414                                 if (rect) {
 415                                         s.addChild(rotatedLetter(chars[i],
 416                                                                                          tStart + offsetSign*(rect.left+rect.width/2)/pathlength,
 417                                                                                          rect.width, tf.height, angleOffset, textOffset));
 418                                 }
 419                         }
 420                 }
 421
 422                 private function rotatedLetter(char:String, t:Number, w:Number, h:Number, a:Number, o:Number):TextField {
 423                         var tf:TextField = new TextField();
 424             tf.mouseEnabled = false;
 425             tf.mouseWheelEnabled = false;
 426                         tf.defaultTextFormat = nameformat;
 427                         tf.embedFonts = true;
 428                         tf.text = char;
 429                         tf.width = tf.textWidth+4;
 430                         tf.height = tf.textHeight+4;
 431
 432                         var p:Array=pointAt(t);
 433                         var matrix:Matrix = new Matrix();
 434                         matrix.translate(-w/2, -h/2-o);
 435                         // ** add (say) -4 to the height to move it up by 4px
 436                         matrix.rotate(p[2]+a);
 437                         matrix.translate(p[0], p[1]);
 438                         tf.transform.matrix = matrix;
 439                         return tf;
 440                 }
 441
 442                 public function getNodeAt(x:Number, y:Number):Node {
 443                         for (var i:uint = 0; i < way.length; i++) {
 444                 var node:Node = way.getNode(i);
 445                 var nodeX:Number = paint.map.lon2coord(node.lon);
 446                 var nodeY:Number = paint.map.latp2coord(node.latp);
 447                 if ( nodeX >= x-NODESIZE && nodeX <= x+NODESIZE &&
 448                      nodeY >= y-NODESIZE && nodeY <= y+NODESIZE )
 449                     return node;
 450             }
 451             return null;
 452                 }
 453
 454         override protected function mouseEvent(event:MouseEvent):void {
 455                         paint.map.entityMouseEvent(event, way);
 456         }
 457
 458         }
 459 }