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PolyLine.as @ 6839

Revision 6839, 7.3 kB (checked in by gyuque, 5 years ago)
metro-map: imported

Line
1	package mkmap
2	{
3	import flash.display.*;
4	import flash.events.*;
5	import flash.geom.*;
6	public class PolyLine extends CanvasObject
7	{
8	private var mFirst:Segment;
9	private var mLast:Segment;
10	private var mCanvas:MCanvas;
11	private var mCornerR:int;
12
13	private var mThick:int;
14	private var mLineColor:uint;
15
16	function PolyLine(c:MCanvas, initY:int = 10)
17	{
18	mCornerR = 19;
19	mThick = 6;
20	mLineColor = 0x4466ff;
21
22	setInitialSegment(new Segment(10, initY, 110, initY+100));
23	mCanvas = c;
24	mouseEnabled = false;
25	}
26
27	public function set lineColor(c:uint):void
28	{
29	mLineColor = c;
30	updateView();
31	}
32
33	private function setInitialSegment(s:Segment):void
34	{
35	mFirst = s;
36	mLast = s;
37
38	s.next = null;
39	s.prev = null;
40
41	var hb:AnchorButton = new AnchorButton(false);
42	var tb:AnchorButton = new AnchorButton(false);
43	var mb:AnchorButton = new AnchorButton(true);
44
45	addChild(hb);
46	addChild(tb);
47	addChild(mb);
48	hb.onMoved = onAnchorMove;
49	tb.onMoved = onAnchorMove;
50	mb.onMoved = onAnchorMove;
51
52	updateView();
53
54	s.headAnc = hb;
55	s.midAnc = mb;
56	s.tailAnc = tb;
57	s.updateAnchors();
58
59	tb.backSegment = s;
60	mb.middleSegment = s;
61	}
62
63	private function mid_point(x1:int, y1:int, x2:int, y2:int, t:Number, pout:Point):void
64	{
65	var vx:Number = x2 - x1;
66	var vy:Number = y2 - y1;
67
68	var nrm:Number = Math.sqrt(vxvx + vyvy);
69	if (nrm < t)
70	{
71	pout.x = x2;
72	pout.y = y2;
73	return;
74	}
75
76	var fct:Number = (nrm-t) / nrm;
77	pout.x = x1 + vx*fct;
78	pout.y = y1 + vy*fct;
79	}
80
81	private var _tmpPt1:Point = new Point();
82	private var _tmpPt2:Point = new Point();
83	private function updateView():void
84	{
85	var s:Segment;
86	graphics.clear();
87
88	var g:Graphics = graphics;
89
90	for (var phase:int = 0;phase < 2;phase++)
91	{
92	g.lineStyle(mThick + (1-phase)*2, (phase == 0) ? 0xffffff : mLineColor, 1, true, LineScaleMode.NONE, CapsStyle.ROUND);
93	for(s = mFirst; s != null; s=s.next)
94	{
95	if (s == mFirst)
96	g.moveTo(s.x1, s.y1);
97
98	if (s.next != null)
99	{
100	var nx:Segment = s.next;
101	mid_point(s.x1, s.y1, s.x2, s.y2, mCornerR, _tmpPt1);
102	mid_point(nx.x2, nx.y2, nx.x1, nx.y1, mCornerR, _tmpPt2);
103	g.lineTo(_tmpPt1.x, _tmpPt1.y);
104	g.curveTo(s.x2, s.y2, _tmpPt2.x, _tmpPt2.y);
105	}
106	else
107	g.lineTo(s.x2, s.y2);
108	}
109	}
110
111	for(s = mFirst; s != null; s=s.next)
112	drawCenterLine(s);
113	}
114
115	private function onAnchorMove(anc:AnchorButton, e:MouseEvent):void
116	{
117	var p:Point = new Point();
118	mCanvas.getSnappedMousePosition(p);
119
120	if (anc.middleSegment != null)
121	{
122	if (doFold(anc.middleSegment, p.x, p.y))
123	updateView();
124	}
125	else if (anc.backSegment != null)
126	{
127	moveEndAnchor(anc.backSegment, anc.backSegment.next, p.x, p.y);
128	checkUnfold(anc);
129	updateView();
130	anc.backSegment.updateAnchors();
131	if (anc.backSegment.next)
132	anc.backSegment.next.updateAnchors();
133	}
134	else
135	{
136	if (anc == mFirst.headAnc)
137	{
138	moveEndAnchor(null, mFirst, p.x, p.y);
139	updateView();
140	mFirst.updateAnchors();
141	if (mFirst.next)
142	mFirst.next.updateAnchors();
143	}
144	}
145	}
146
147	private function distance2_from_sprite(x:int, y:int, s:Sprite):Number
148	{
149	var dx:int = x - s.x;
150	var dy:int = y - s.y;
151	return dxdx + dydy;
152	}
153
154	private function divideSegmentAt(x:int, y:int, s:Segment):Segment
155	{
156	var oldNext:Segment = s.next;
157	var newSeg:Segment = new Segment(x, y, s.x2, s.y2);
158
159	var tb:AnchorButton = new AnchorButton(false);
160	var mb:AnchorButton = new AnchorButton(true);
161	addChild(tb);
162	addChild(mb);
163	tb.onMoved = onAnchorMove;
164	mb.onMoved = onAnchorMove;
165	tb.backSegment = newSeg;
166	mb.middleSegment = newSeg;
167
168	newSeg.headAnc = s.tailAnc;
169	newSeg.midAnc = mb;
170	newSeg.tailAnc = tb;
171
172	s.x2 = x;
173	s.y2 = y;
174
175	s.next = newSeg;
176	newSeg.prev = s;
177
178	newSeg.next = oldNext;
179	if (oldNext)
180	{
181	oldNext.prev = newSeg;
182	oldNext.headAnc = tb;
183	}
184
185	if (s == mLast)
186	mLast = newSeg;
187
188	s.updateAnchors();
189	newSeg.updateAnchors();
190	if (oldNext)
191	oldNext.updateAnchors();
192
193	return newSeg;
194	}
195
196	private function doFold(seg:Segment, x:int, y:int):Boolean
197	{
198	if (distance2_from_sprite(x, y, seg.midAnc) > 400)
199	{
200	seg.midAnc.forceRelease();
201
202	divideSegmentAt(x, y, seg);
203	seg.tailAnc.forceDown();
204
205	return true;
206	}
207
208	return false;
209	}
210
211	private function nearZero(v:Number):Boolean
212	{
213	return (v > -0.01 && v < 0.01);
214	}
215
216	private function calcNormalDP(vx1:Number, vy1:Number, vx2:Number, vy2:Number):Number
217	{
218	var nrm1:Number = Math.sqrt(vx1vx1 + vy1vy1);
219	if (nearZero(nrm1))
220	return 0;
221
222	var nrm2:Number = Math.sqrt(vx2vx2 + vy2vy2);
223	if (nearZero(nrm2))
224	return 0;
225
226	vx1 /= nrm1;
227	vy1 /= nrm1;
228	vx2 /= nrm2;
229	vy2 /= nrm2;
230
231	return vx1vx2 + vy1vy2;
232	}
233
234	private function checkUnfold(anc:AnchorButton):Boolean
235	{
236	var seg1:Segment = anc.backSegment;
237	if (seg1 == null)
238	return false;
239
240	var seg2:Segment = seg1.next;
241	if (seg2 == null)
242	return false;
243
244	var vx1:int = seg1.x2 - seg1.x1;
245	var vy1:int = seg1.y2 - seg1.y1;
246
247	var vx2:int = seg2.x2 - seg2.x1;
248	var vy2:int = seg2.y2 - seg2.y1;
249
250	if (calcNormalDP(vx1, vy1, vx2, vy2) > 0.98)
251	unfold(seg1, seg2);
252
253	return true;
254	}
255
256	private function unfold(seg1:Segment, seg2:Segment):void
257	{
258	// remove seg2
259
260	seg1.x2 = seg2.x2;
261	seg1.y2 = seg2.y2;
262
263	seg1.next = seg2.next;
264	if (seg2.next)
265	seg2.next.prev = seg1;
266
267	// remove anchors
268	seg2.midAnc.onMoved = null;
269	removeChild(seg2.midAnc);
270
271	seg1.tailAnc.onMoved = null;
272	removeChild(seg1.tailAnc);
273
274	seg1.tailAnc = seg2.tailAnc;
275	seg1.tailAnc.backSegment = seg1;
276
277	if (seg2 == mLast)
278	mLast = seg1;
279	}
280
281	private function moveEndAnchor(seg1:Segment, seg2:Segment, x:int, y:int):void
282	{
283	if (seg1 != null)
284	{
285	seg1.x2 = x;
286	seg1.y2 = y;
287	}
288
289	if (seg2 != null)
290	{
291	seg2.x1 = x;
292	seg2.y1 = y;
293	}
294
295	}
296
297	private function drawCenterLine(s:Segment):void
298	{
299	var g:Graphics = graphics;
300	g.lineStyle(3, 0xffffff, 1, true);
301	g.moveTo(s.x1, s.y1);
302	g.lineTo(s.x2, s.y2);
303
304	g.lineStyle(1, 0x000000, 1, true);
305	g.moveTo(s.x1, s.y1);
306	g.lineTo(s.x2, s.y2);
307	}
308
309	private static function makeHexColor(c:uint):String
310	{
311	var R:String = ((c&0xff0000) >> 16).toString(16);
312	var G:String = ((c&0x00ff00) >> 8).toString(16);
313	var B:String = ( c&0x0000ff ).toString(16);
314
315	if (R.length<2) R = "0"+R;
316	if (G.length<2) G = "0"+G;
317	if (B.length<2) B = "0"+B;
318
319	return R+G+B;
320	}
321
322	public override function serialize():String
323	{
324	var attrs:Array = [];
325	var points:Array = [];
326
327	attrs.push("color=\"#"+makeHexColor(mLineColor)+"\"");
328
329	for(var s:Segment = mFirst; s != null; s=s.next)
330	{
331	points.push(s.x1+" "+s.y1);
332	if (s.next == null)
333	points.push(s.x2+" "+s.y2);
334	}
335
336	return "<polyline " +attrs.join(" ")+ ">" + points.join(",") + "</polyline>"
337	}
338	}
339	}

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