dojo_app/js/library/dojox/sketch/Anchor.js

define([
	"dojo/_base/kernel",
	"dojo/_base/lang",
	"../gfx"
], function(dojo){
	dojo.getObject("sketch", true, dojox);

	dojox.sketch.Anchor=function(an, id, isControl){
		var self=this;
		var size=4;	//	.5 * size of anchor.
		var rect=null;

		this.type=function(){ return "Anchor"; };
		this.annotation=an;

		this.id=id;
		this._key="anchor-" + dojox.sketch.Anchor.count++;
		this.shape=null;
		this.isControl=(isControl!=null)?isControl:true;

		this.beginEdit=function(){
			this.annotation.beginEdit(dojox.sketch.CommandTypes.Modify);
		};
		this.endEdit=function(){
			this.annotation.endEdit();
		};
		this.zoom=function(pct){
			if(this.shape){
				var rs=Math.floor(size/pct);
				var width=dojox.gfx.renderer=='vml'?1:1/pct
				this.shape.setShape({ x:an[id].x-rs, y:an[id].y-rs, width:rs*2, height:rs*2 }).setStroke({ color:"black", width:width }); //For IE, maybe we need Math.ceil(1/pct)||1
			}
		}
		/*this.doChange=function(pt){
			if(this.isControl){
				this.shape.applyTransform(pt);
			} else{
				an.transform.dx+=pt.dx;
				an.transform.dy+=pt.dy;
			}
		};*/
		this.setBinding=function(pt){
			an[id]={ x: an[id].x+pt.dx, y:an[id].y+pt.dy };
			an.draw();
			an.drawBBox();
		};
		this.setUndo=function(){ an.setUndo(); };

		this.enable=function(){
			if(!an.shape){ return; }
			an.figure._add(this);
			rect={ x:an[id].x-size, y:an[id].y-size, width:size*2, height:size*2 };
			this.shape=an.shape.createRect(rect)
				//.setStroke({ color:"black", width:1 })
				.setFill([255,255,255,0.35]);
			this.shape.getEventSource().setAttribute("id", self._key);
			this.shape.getEventSource().setAttribute("shape-rendering", "crispEdges");
			this.zoom(an.figure.zoomFactor);
		};
		this.disable=function(){
			an.figure._remove(this);
			if(an.shape){ an.shape.remove(this.shape); }
			this.shape=null;
			rect=null;
		};
	};
	dojox.sketch.Anchor.count=0;
	return dojox.sketch.Anchor;
});