source: Dev/trunk/src/client/dojox/sketch/DoubleArrowAnnotation.js

define(["dojo/_base/kernel", "dojo/_base/lang", "./Annotation", "./Anchor"], function(dojo){
        dojo.getObject("sketch", true, dojox);
        var ta=dojox.sketch;
        console.log(ta);
        ta.DoubleArrowAnnotation=function(figure, id){
                ta.Annotation.call(this, figure, id);
                this.transform={ dx:0, dy:0 };
                this.start={x:0, y:0};
                this.control={x:100, y:-50};
                this.end={x:200, y:0};
                this.textPosition={ x:0, y:0 };
                this.textOffset=6;
                this.textYOffset=10;
                this.textAlign="middle";
                this.startRotation=0;
                this.endRotation=0;

//              this.property('label',this.id);
                this.labelShape=null;
                this.pathShape=null;
                this.startArrow=null;
                this.startArrowGroup=null;
                this.endArrow=null;
                this.endArrowGroup=null;

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

        p.type=function(){ return 'DoubleArrow'; };
        p.getType=function(){ return ta.DoubleArrowAnnotation; };

        p._rot=function(){
                //      arrowhead rotation
                var opp=this.control.y-this.start.y;
                var adj=this.control.x-this.start.x;
                this.startRotation=Math.atan2(opp,adj);

                opp=this.end.y-this.control.y;
                adj=this.end.x-this.control.x;
                this.endRotation=Math.atan2(opp,adj);
        };
        p._pos=function(){
                //      text position
                var offset=this.textOffset;

                //      figure out the pull of the curve and place accordingly
                if(this.control.y<this.end.y){ offset*=-1; }
                else { offset+=this.textYOffset; }
                var ab={
                        x:((this.control.x-this.start.x)*.5)+this.start.x,
                        y:((this.control.y-this.start.y)*.5)+this.start.y
                };
                var bc={
                        x:((this.end.x-this.control.x)*.5)+this.control.x,
                        y:((this.end.y-this.control.y)*.5)+this.control.y
                };
                this.textPosition={
                        x:((bc.x-ab.x)*.5)+ab.x,
                        y:(((bc.y-ab.y)*.5)+ab.y)+offset
                };
        };
        
        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=="path"){
                                //      the line
                                var d=c.getAttribute('d').split(" ");
                                var s=d[0].split(",");
                                this.start.x=parseFloat(s[0].substr(1),10);
                                this.start.y=parseFloat(s[1],10);
                                s=d[1].split(",");
                                this.control.x=parseFloat(s[0].substr(1),10);
                                this.control.y=parseFloat(s[1],10);
                                s=d[2].split(",");
                                this.end.x=parseFloat(s[0],10);
                                this.end.y=parseFloat(s[1],10);
                                var stroke=this.property('stroke');
                                var style=c.getAttribute('style');
                                var m=style.match(/stroke:([^;]+);/);
                                if(m){
                                        stroke.color=m[1];
                                        this.property('fill',m[1]);
                                }
                                m=style.match(/stroke-width:([^;]+);/);
                                if(m){
                                        stroke.width=m[1];
                                }
                                this.property('stroke',stroke);
                        }
                }
        };
        p.initialize=function(obj){
                //      create, based on passed DOM node if available.
                var font=(ta.Annotation.labelFont)?ta.Annotation.labelFont:{family:"Times", size:"16px"};
                this.apply(obj);

                //      calculate the other positions
                this._rot();
                this._pos();

                //      rotation matrix
                var rot=this.startRotation;
                var startRot=dojox.gfx.matrix.rotate(rot);

                rot=this.endRotation;
                var endRot=dojox.gfx.matrix.rotateAt(rot, this.end.x, this.end.y);

                //      draw the shapes
                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.pathShape=this.shape.createPath("M"+this.start.x+" "+this.start.y+"Q"+this.control.x+" "+this.control.y+" "+this.end.x+" "+this.end.y + " l0,0")
                        //.setStroke(this.property('stroke'));
                
                this.startArrowGroup=this.shape.createGroup().setTransform({ dx:this.start.x, dy:this.start.y });
                this.startArrowGroup.applyTransform(startRot);
                this.startArrow=this.startArrowGroup.createPath();//"M0,0 l20,-5 -3,5 3,5 Z").setFill(this.property('fill'));
                
                this.endArrowGroup=this.shape.createGroup().setTransform(endRot);
                this.endArrow=this.endArrowGroup.createPath();//("M" + this.end.x + "," + this.end.y + " l-20,-5 3,5 -3,5 Z").setFill(this.property('fill'));

                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'));
                this.labelShape.getEventSource().setAttribute('id',this.id+"-labelShape");
                this.draw();
        };
        p.destroy=function(){
                if(!this.shape){ return; }
                this.startArrowGroup.remove(this.startArrow);
                this.endArrowGroup.remove(this.endArrow);
                this.shape.remove(this.startArrowGroup);
                this.shape.remove(this.endArrowGroup);
                this.shape.remove(this.pathShape);
                this.shape.remove(this.labelShape);
                this.figure.group.remove(this.shape);
                this.shape=this.pathShape=this.labelShape=this.startArrowGroup=this.startArrow=this.endArrowGroup=this.endArrow=null;
        };
        p.draw=function(obj){
                this.apply(obj);
                this._rot();
                this._pos();

                //      rotation matrix
                var rot=this.startRotation;
                var startRot=dojox.gfx.matrix.rotate(rot);
                rot=this.endRotation;
                var endRot=dojox.gfx.matrix.rotateAt(rot, this.end.x, this.end.y);

                this.shape.setTransform(this.transform);
                this.pathShape.setShape("M"+this.start.x+" "+this.start.y+" Q"+this.control.x+" "+this.control.y+" "+this.end.x+" "+this.end.y + " l0,0")
                        //.setStroke(this.property('stroke'));
                this.startArrowGroup.setTransform({ dx:this.start.x, dy:this.start.y }).applyTransform(startRot);
                this.startArrow.setFill(this.property('fill'));
                
                this.endArrowGroup.setTransform(endRot);
                this.endArrow.setFill(this.property('fill'));
                this.labelShape.setShape({
                                x:this.textPosition.x,
                                y:this.textPosition.y,
                                text:this.property('label')
                        })
                        .setFill(this.property('fill'));
                this.zoom();
        };

        p.zoom=function(pct){
                if(this.startArrow){
                        pct = pct || this.figure.zoomFactor;
                        ta.Annotation.prototype.zoom.call(this,pct);

                        var l=pct>1?20:Math.floor(20/pct), w=pct>1?5:Math.floor(5/pct),h=pct>1?3:Math.floor(3/pct);
                        this.startArrow.setShape("M0,0 l"+l+",-"+w+" -"+h+","+w+" "+h+","+w+" Z");//.setFill(this.property('fill'));

                        this.endArrow.setShape("M" + this.end.x + "," + this.end.y + " l-"+l+",-"+w+" "+h+","+w+" -"+h+","+w+" Z");
                }
        };
        
        p.getBBox=function(){
                var x=Math.min(this.start.x, this.control.x, this.end.x);
                var y=Math.min(this.start.y, this.control.y, this.end.y);
                var w=Math.max(this.start.x, this.control.x, this.end.x)-x;
                var h=Math.max(this.start.y, this.control.y, this.end.y)-y;
                return { x:x, y:y, width:w, height:h };
        };

        p.serialize=function(){
                var s=this.property('stroke');
                return '<g '+this.writeCommonAttrs()+'>'
                        + '<path style="stroke:'+s.color+';stroke-width:'+s.width+';fill:none;" d="'
                        + "M"+this.start.x+","+this.start.y+" "
                        + "Q"+this.control.x+","+this.control.y+" "
                        + this.end.x+","+this.end.y
                        + '" />'
                        + '<g transform="translate(' + this.start.x + "," + this.start.y + ") "
                        + 'rotate(' + (Math.round((this.startRotation*(180/Math.PI))*Math.pow(10,4))/Math.pow(10,4)) + ')">'
                        + '<path style="fill:'+s.color+';" d="M0,0 l20,-5, -3,5, 3,5 Z" />'
                        + '</g>'
                        + '<g transform="rotate('
                        + (Math.round((this.endRotation*(180/Math.PI))*Math.pow(10,4))/Math.pow(10,4))
                        + ", "+this.end.x+", "+this.end.y
                        + ')">'
                        + '<path style="fill:'+s.color+';" d="M'+this.end.x+","+this.end.y+' l-20,-5, 3,5, -3,5 Z" />'
                        + '</g>'
                        + '<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("DoubleArrow");
        return dojox.sketch.DoubleArrowAnnotation;
});