preexistingannotation.js

这是一个ajax的例子大家好好的看看就是一个鱼眼的效果

if(!dojo._hasResource["dojox.sketch.PreexistingAnnotation"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
dojo._hasResource["dojox.sketch.PreexistingAnnotation"] = true;
dojo.provide("dojox.sketch.PreexistingAnnotation");

dojo.require("dojox.sketch.Annotation");
dojo.require("dojox.sketch.Anchor");

(function(){
	var ta=dojox.sketch;
	ta.PreexistingAnnotation=function(figure, id){
		ta.Annotation.call(this, figure, id);
		this.transform={dx:0, dy:0};
		this.start={ x:0, y:0 };
		this.end={ x:200, y:200 };
		this.radius=8;
		this.textPosition={ x:196, y:196 };
		this.textOffset=4;
		this.textAlign="end";

		this.property('label',this.id);
		this.rectShape=null;
		this.labelShape=null;

		this.anchors.start=new ta.Anchor(this, "start");
		this.anchors.end=new ta.Anchor(this, "end");
	};
	ta.PreexistingAnnotation.prototype=new ta.Annotation;
	var p=ta.PreexistingAnnotation.prototype;
	p.constructor=ta.PreexistingAnnotation;

	p.type=function(){ return 'Preexisting' };
	p.getType=function(){ return ta.PreexistingAnnotation; };

	p._pos=function(){
		var x=Math.min(this.start.x, this.end.x);
		var y=Math.min(this.start.y, this.end.y);
		var w=Math.max(this.start.x, this.end.x);
		var h=Math.max(this.start.y, this.end.y);
		this.start={ x:x, y:y };
		this.end={ x:w, y:h };
		this.textPosition={ x:this.end.x-this.textOffset, y:this.end.y-this.textOffset };
	};
	p.apply=function(obj){
		if(!obj) return;
		if(obj.documentElement) obj=obj.documentElement;
		this.readCommonAttrs(obj);
		
		for(var i=0; i<obj.childNodes.length; i++){
			var c=obj.childNodes[i];
			if(c.localName=="text") this.property('label',c.childNodes.length?c.childNodes[0].nodeValue:'');
			else if(c.localName=="rect"){
				if(c.getAttribute('x')!==null) this.start.x=parseFloat(c.getAttribute('x'), 10);
				if(c.getAttribute('width')!==null) this.end.x=parseFloat(c.getAttribute('width'), 10)+parseFloat(c.getAttribute('x'), 10);
				if(c.getAttribute('y')!==null) this.start.y=parseFloat(c.getAttribute('y'), 10);
				if(c.getAttribute('height')!==null) this.end.y=parseFloat(c.getAttribute('height'), 10)+parseFloat(c.getAttribute('y'), 10);
				if(c.getAttribute('r')!==null) this.radius=parseFloat(c.getAttribute('r'),10);
			}
		}
	};
	p.initialize=function(obj){
		var font=(ta.Annotation.labelFont)?ta.Annotation.labelFont:{family:"Times", size:"16px"};
		this.apply(obj);
		this._pos();

		//	create either from scratch or based on the passed node
		this.shape=this.figure.group.createGroup();
		this.shape.getEventSource().setAttribute("id", this.id);
		if(this.transform.dx || this.transform.dy) this.shape.setTransform(this.transform);
		this.rectShape=this.shape.createRect({
			x:this.start.x, y: this.start.y, width: this.end.x-this.start.x, height:this.end.y-this.start.y, r:this.radius
		}).setStroke({color:this.property('fill'), width:1}).setFill([255,255,255,0.1]);
		this.rectShape.getEventSource().setAttribute("shape-rendering","crispEdges");
		this.labelShape=this.shape.createText({
			x:this.textPosition.x, y:this.textPosition.y, text:this.property('label'), align:this.textAlign
		}).setFont(font).setFill(this.property('fill'));
	};
	p.destroy=function(){
		if(!this.shape) return;
		this.shape.remove(this.rectShape);
		this.shape.remove(this.labelShape);
		this.figure.group.remove(this.shape);
		this.shape=this.rectShape=this.labelShape=null;
	};
	p.getBBox=function(){
		var x=Math.min(this.start.x, this.end.x);
		var y=Math.min(this.start.y, this.end.y);
		var w=Math.max(this.start.x, this.end.x)-x;
		var h=Math.max(this.start.y, this.end.y)-y;
		return { x:x-2, y:y-2, width:w+4, height:h+4 };
	};
	p.draw=function(obj){
		this.apply(obj);
		this._pos();
		this.shape.setTransform(this.transform);
		this.rectShape.setShape({x:this.start.x, y: this.start.y, width: this.end.x-this.start.x, height:this.end.y-this.start.y, r:this.radius})
			.setStroke({ color:this.property('fill'), width:1 }).setFill([255,255,255,0.1]);
		this.labelShape.setShape({ x:this.textPosition.x, y:this.textPosition.y, text:this.property('label') }).setFill(this.property('fill'));
	};
	p.serialize=function(){
		var s=this.property('stroke');
		return '<g '+this.writeCommonAttrs()+'>'
			+ '<rect style="stroke:'+s.color+';stroke-weight:1;fill:none;" '
			+ 'x="' + this.start.x + '" '
			+ 'width="' + (this.end.x-this.start.x) + '" '
			+ 'y="' + this.start.y + '" '
			+ 'height="' + (this.end.y-this.start.y) + '" '
			+ 'rx="' + this.radius + '" '
			+ 'ry="' + this.radius + '" '
			+ ' />'
			+ '<text style="fill:'+s.color+';text-anchor:'+this.textAlign+'" font-weight="bold" '
			+ 'x="' + this.textPosition.x + '" '
			+ 'y="' + this.textPosition.y + '">'
			+ this.property('label')
			+ '</text>'
			+ '</g>';
	};

	ta.Annotation.register("Preexisting");
})();

}