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swfgmap

Timestamp:

12/06/07 17:24:47 (13 months ago)

Author:

gyuque

Message:

lang/actionscript/swfgmap: implemented zooming with fixed point

Location:

lang/actionscript/swfgmap/trunk/gyuque/gmap

Files:

r2528	r2637
2	2	{
3	3	import flash.display.*;
	4	import flash.geom.Point;
4	5	import flash.text.TextField;
5	6	import flash.text.TextFormat;
…	…
103	104	protected function onMouseWheel(e:MouseEvent):void
104	105	{
105		zoom((e.delta > 0) ? 1 : -1);
106		}
107
108		protected function zoom(d:int):void
	106	zoom((e.delta > 0) ? 1 : -1, e.stageX, e.stageY);
	107	}
	108
	109	protected function zoom(d:int, px:Number = -1, py:Number = -1):void
109	110	{
110	111	var z:int = mCurrentViewport.zoom;
…	…
115	116
116	117	mCurrentViewport.zoom = z;
	118	if (px >= 0 \|\| py >= 0) {
	119	var mv:Point = calcFixedPointZoom(px, py, (d>0) ? 2 : 0.5, mCurrentViewport);
	120	mCurrentViewport.moveByPixel(mv.x, mv.y);
	121	//fireViewportChange(mv.x, mv.y, z - oldz);
	122	//return;
	123	}
	124
117	125	fireViewportChange(0,0,z - oldz);
	126	}
	127
	128	protected function calcFixedPointZoom(sx:Number, sy:Number, zoomRatio:Number, vpAfter:GMapViewport):Point
	129	{
	130	sx -= vpAfter.width *0.5;
	131	sy -= vpAfter.height*0.5;
	132
	133	var sx2:Number = sx * zoomRatio;
	134	var sy2:Number = sy * zoomRatio;
	135
	136	var dx:Number = sx2 - sx;
	137	var dy:Number = sy2 - sy;
	138
	139	// var retval:Point = new Point();
	140	// vpAfter.transformVectorScreenToView(dx, dy, retval);
	141	// return retval;
	142	return new Point(dx, dy);
118	143	}
119	144

r2528	r2637
8	8	private var mLatlng:LatLng = new LatLng();
9	9	private var mNrmXY:Point = new Point();
10		~~//private var mScreenXY:Point = new Point();~~
11	10	private var mBitmapXY:Point = new Point();
12	11	private var mViewSize:Point = new Point();
…	…
36	35
37	36	calcXY();
38		~~//mScreenXY.x = 0;~~
39		~~//mScreenXY.y = 0;~~
40	37	}
41	38
…	…
76	73
77	74	calcXY();
78		~~// mScreenXY.x = 0;~~
79		~~// mScreenXY.y = 0;~~
80	75	}
81	76
…	…
127	122	return mLatlng.lng;
128	123	}
129		/*
130		public function get screenX():Number
131		{
132		return mScreenXY.x;
133		}
134
135		public function get screenY():Number
136		{
137		return mScreenXY.y;
138		}
139		*/
	124
140	125	public function get to_screen_transform():Matrix
141	126	{

r2528	r2637
92	92	var tile:GMapMapTile = new GMapMapTile(tx, ty, GMapCalc.calcMapsZoomIndex(mViewport.zoom));
93	93	tile.addEventListener(IOErrorEvent.IO_ERROR, onIOError);
94		mVPobs.dout.puts(tile.url);
	94	//mVPobs.dout.puts(tile.url);
95	95
96	96	addChild(tile.loadTile());