1 package net.systemeD.halcyon {
3 import flash.display.*;
4 import flash.geom.Matrix;
5 import flash.geom.Point;
6 import flash.geom.Rectangle;
7 import flash.text.AntiAliasType;
8 import flash.text.GridFitType;
9 import flash.text.TextField;
10 import flash.text.TextFormat;
11 import flash.events.*;
12 import net.systemeD.halcyon.styleparser.*;
13 import net.systemeD.halcyon.connection.*;
18 public var pathlength:Number; // length of path
19 public var patharea:Number; // area of path
20 public var centroid_x:Number; // centroid
21 public var centroid_y:Number; // |
22 public var layer:int=0; // map layer
23 public var map:Map; // reference to parent map
24 public var sprites:Array=new Array(); // instances in display list
25 private var hitzone:Sprite;
27 public static const DEFAULT_TEXTFIELD_PARAMS:Object = {
29 antiAliasType: AntiAliasType.ADVANCED,
30 gridFitType: GridFitType.NONE
32 public var nameformat:TextFormat;
35 public function WayUI(way:Way, map:Map) {
39 way.addEventListener(Connection.TAG_CHANGE, wayTagChanged);
42 private function wayTagChanged(event:TagEvent):void {
46 private function init():void {
49 // updateBbox(lon, lat);
50 // ** various other stuff
53 // ------------------------------------------------------------------------------------------
54 // Calculate length etc.
55 // ** this could be made scale-independent - would speed up redraw
57 public function recalculate():void {
58 var lx:Number, ly:Number, sc:Number;
59 var cx:Number=0, cy:Number=0;
63 lx = way.getNode(way.length-1).lon;
64 ly = way.getNode(way.length-1).latp;
65 for ( var i:uint = 0; i < way.length; i++ ) {
66 var node:Node = way.getNode(i);
67 var latp:Number = node.latp;
68 var lon:Number = node.lon;
69 if ( i>0 ) { pathlength += Math.sqrt( Math.pow(lon-lx,2)+Math.pow(latp-ly,2) ); }
70 sc = (lx*latp-lon*ly)*map.scalefactor;
77 pathlength*=map.scalefactor;
79 if (patharea!=0 && way.isArea()) {
80 centroid_x=map.lon2coord(cx/patharea/6);
81 centroid_y=map.latp2coord(cy/patharea/6);
82 } else if (pathlength>0) {
83 var c:Array=pointAt(0.5);
89 // ------------------------------------------------------------------------------------------
92 public function redraw():void {
93 var tags:Object = way.getTagsCopy();
95 // remove all currently existing sprites
96 while (sprites.length>0) {
97 var d:DisplayObject=sprites.pop(); d.parent.removeChild(d);
103 layer=Math.min(Math.max(tags['layer']+5,-5),5)+5;
106 var styles:Array=map.ruleset.getStyles(false, tags, map.scale);
107 for each (var s:* in styles) {
109 if (s is ShapeStyle) {
110 var stroke:Shape, fill:Shape, roadname:Sprite, f:Graphics, g:Graphics;
111 var doStroke:Boolean=false, doDashed:Boolean=false;
112 var doFill:Boolean=false, fill_colour:uint, fill_opacity:Number;
113 var doCasing:Boolean=false, doDashedCasing:Boolean=false;
117 stroke=new Shape(); addToLayer(stroke,1,s.sublayer); g=stroke.graphics;
118 g.moveTo(map.lon2coord(way.getNode(0).lon), map.latp2coord(way.getNode(0).latp));
119 g.lineStyle(s.stroke_width, s.stroke_colour, s.stroke_opacity/100,
120 false, "normal", s.stroke_linecap, s.stroke_linejoin);
123 // Set fill and casing style
124 if (s.isFilled || s.isCased) {
125 fill=new Shape(); addToLayer(fill,0); f=fill.graphics;
126 f.moveTo(map.lon2coord(way.getNode(0).lon), map.latp2coord(way.getNode(0).latp));
127 if (s.isCased) { f.lineStyle(s.casing_width, s.casing_colour, s.casing_opacity/100,
128 false, "normal", s.stroke_linecap, s.stroke_linejoin); }
129 if (s.isFilled) { f.beginFill(s.fill_colour,s.fill_opacity/100); }
133 if (s.stroke_dashArray.length>0) { dashedLine(g,s.stroke_dashArray); }
134 else if (s.isStroked) { solidLine(g); }
136 // Draw fill and casing
137 if (s.casing_dashArray.length>0) { dashedLine(f,s.casing_dashArray); f.lineStyle(); }
138 if (s.isFilled) { f.beginFill(s.fill_colour,s.fill_opacity/100);
139 solidLine(f); f.endFill(); }
140 else if (s.isCased && s.casing_dashArray.length==0) { solidLine(f); }
143 } else if (s is TextStyle && s.tag && tags[s.tag]) {
144 roadname=new Sprite(); addToLayer(roadname,2);
145 nameformat = s.getTextFormat();
146 var a:String=tags[s.tag]; if (s.font_caps) { a=a.toUpperCase(); }
148 writeNameOnPath(roadname,a,s.text_offset ? s.text_offset : 0);
149 if (s.pullout_radius>0) { roadname.filters=s.getPulloutFilter(); }
150 } else if (centroid_x) {
151 s.writeNameLabel(roadname,tags[s.tag],centroid_x,centroid_y);
155 } else if (s is ShieldStyle) {
160 if ( styles.length == 0 ) {
161 // there's no styles... so add a thin trace
162 var def:Sprite = new Sprite();
163 def.graphics.lineStyle(0.5, 0x808080, 1, false, "normal");
164 solidLine(def.graphics);
168 // create a generic "way" hitzone sprite
169 hitzone = new Sprite();
170 hitzone.graphics.lineStyle(4, 0x000000, 1, false, "normal", CapsStyle.ROUND, JointStyle.ROUND);
171 solidLine(hitzone.graphics);
172 addToLayer(hitzone, 2);
173 hitzone.visible = false;
175 var listenSprite:Sprite = new Sprite();
176 listenSprite.hitArea = hitzone;
177 addToLayer(listenSprite, 2);
178 listenSprite.buttonMode = true;
179 listenSprite.mouseEnabled = true;
180 listenSprite.addEventListener(MouseEvent.CLICK, mouseEvent);
181 listenSprite.addEventListener(MouseEvent.DOUBLE_CLICK, mouseEvent);
182 listenSprite.addEventListener(MouseEvent.MOUSE_OVER, mouseEvent);
183 listenSprite.addEventListener(MouseEvent.MOUSE_OUT, mouseEvent);
187 // ------------------------------------------------------------------------------------------
188 // Drawing support functions
190 // Draw solid polyline
192 private function solidLine(g:Graphics):void {
193 var node:Node = way.getNode(0);
194 g.moveTo(map.lon2coord(node.lon), map.latp2coord(node.latp));
195 for (var i:uint = 1; i < way.length; i++) {
196 node = way.getNode(i);
197 g.lineTo(map.lon2coord(node.lon), map.latp2coord(node.latp));
201 // Draw dashed polyline
203 private function dashedLine(g:Graphics,dashes:Array):void {
204 var draw:Boolean=false, dashleft:Number=0, dc:Array=new Array();
205 var a:Number, xc:Number, yc:Number;
206 var curx:Number, cury:Number;
207 var dx:Number, dy:Number, segleft:Number=0;
210 var node:Node = way.getNode(0);
211 var nextNode:Node = way.getNode(0);
212 g.moveTo(map.lon2coord(node.lon), map.latp2coord(node.latp));
213 while (i < way.length-1 || segleft>0) {
214 if (dashleft<=0) { // should be ==0
215 if (dc.length==0) { dc=dashes.slice(0); }
219 if (segleft<=0) { // should be ==0
220 node = way.getNode(i);
221 nextNode = way.getNode(i+1);
222 curx=map.lon2coord(node.lon);
223 dx=map.lon2coord(nextNode.lon)-curx;
224 cury=map.latp2coord(node.latp);
225 dy=map.latp2coord(nextNode.latp)-cury;
226 a=Math.atan2(dy,dx); xc=Math.cos(a); yc=Math.sin(a);
227 segleft=Math.sqrt(dx*dx+dy*dy);
231 if (segleft<=dashleft) {
232 // the path segment is shorter than the dash
234 moveLine(g,curx,cury,draw);
235 dashleft-=segleft; segleft=0;
237 // the path segment is longer than the dash
238 curx+=dashleft*xc; dx-=dashleft*xc;
239 cury+=dashleft*yc; dy-=dashleft*yc;
240 moveLine(g,curx,cury,draw);
241 segleft-=dashleft; dashleft=0;
246 private function moveLine(g:Graphics,x:Number,y:Number,draw:Boolean):void {
247 if (draw) { g.lineTo(x,y); }
248 else { g.moveTo(x,y); }
252 // Find point partway (0-1) along a path
253 // returns (x,y,angle)
254 // inspired by senocular's Path.as
256 private function pointAt(t:Number):Array {
257 var totallen:Number = t*pathlength;
258 var curlen:Number = 0;
259 var dx:Number, dy:Number, seglen:Number;
260 for (var i:int = 1; i < way.length; i++){
261 dx=map.lon2coord(way.getNode(i).lon)-map.lon2coord(way.getNode(i-1).lon);
262 dy=map.latp2coord(way.getNode(i).latp)-map.latp2coord(way.getNode(i-1).latp);
263 seglen=Math.sqrt(dx*dx+dy*dy);
264 if (totallen > curlen+seglen) { curlen+=seglen; continue; }
265 return new Array(map.lon2coord(way.getNode(i-1).lon)+(totallen-curlen)/seglen*dx,
266 map.latp2coord(way.getNode(i-1).latp)+(totallen-curlen)/seglen*dy,
269 return new Array(0, 0, 0);
272 // Draw name along path
273 // based on code by Tom Carden
276 private function writeNameOnPath(s:Sprite,a:String,textOffset:Number=0):void {
278 // make a dummy textfield so we can measure its width
279 var tf:TextField = new TextField();
280 tf.defaultTextFormat = nameformat;
282 tf.width = tf.textWidth+4;
283 tf.height = tf.textHeight+4;
284 if (pathlength<tf.width) { return; } // no room for text?
286 var t1:Number = (pathlength/2 - tf.width/2) / pathlength; var p1:Array=pointAt(t1);
287 var t2:Number = (pathlength/2 + tf.width/2) / pathlength; var p2:Array=pointAt(t2);
289 var angleOffset:Number; // so we can do a 180ยบ if we're running backwards
290 var offsetSign:Number; // -1 if we're starting at t2
291 var tStart:Number; // t1 or t2
293 // make sure text doesn't run right->left or upside down
296 p1[2] > -Math.PI/2) {
297 angleOffset = 0; offsetSign = 1; tStart = t1;
299 angleOffset = Math.PI; offsetSign = -1; tStart = t2;
302 // make a textfield for each char, centered on the line,
303 // using getCharBoundaries to rotate it around its center point
304 var chars:Array = a.split('');
305 for (var i:int = 0; i < chars.length; i++) {
306 var rect:Rectangle = tf.getCharBoundaries(i);
308 s.addChild(rotatedLetter(chars[i],
309 tStart + offsetSign*(rect.left+rect.width/2)/pathlength,
310 rect.width, tf.height, angleOffset, textOffset));
315 private function rotatedLetter(char:String, t:Number, w:Number, h:Number, a:Number, o:Number):TextField {
316 var tf:TextField = new TextField();
317 tf.mouseEnabled = false;
318 tf.mouseWheelEnabled = false;
319 tf.defaultTextFormat = nameformat;
320 tf.embedFonts = true;
322 tf.width = tf.textWidth+4;
323 tf.height = tf.textHeight+4;
325 var p:Array=pointAt(t);
326 var matrix:Matrix = new Matrix();
327 matrix.translate(-w/2, -h/2-o);
328 // ** add (say) -4 to the height to move it up by 4px
329 matrix.rotate(p[2]+a);
330 matrix.translate(p[0], p[1]);
331 tf.transform.matrix = matrix;
335 // Add object (stroke/fill/roadname) to layer sprite
337 private function addToLayer(s:DisplayObject,t:uint,sublayer:int=-1):void {
338 var l:DisplayObject=Map(map).getChildAt(layer);
339 var o:DisplayObject=Sprite(l).getChildAt(t);
340 if (sublayer!=-1) { o=Sprite(o).getChildAt(sublayer); }
341 Sprite(o).addChild(s);
343 if ( s is Sprite ) Sprite(s).mouseEnabled = false;
346 private function mouseEvent(event:MouseEvent):void {
347 map.wayMouseEvent(event, way);
350 public function setHighlight(highlight:Boolean):void {
351 hitzone.visible = highlight;