- Author:
- David Nickerson <nickerso@users.sourceforge.net>
- Date:
- 2009-07-16 02:00:03+12:00
- Desc:
- the starting point for the HH tutorial example
- Permanent Source URI:
- https://models.fieldml.org/workspace/a1/rawfile/f6a8f90307388eb4b040ee3566b84d88b59247f7/dojo-presentation/js/dojo/dojox/sketch/SingleArrowAnnotation.js
dojo.provide("dojox.sketch.SingleArrowAnnotation");
dojo.require("dojox.sketch.Annotation");
dojo.require("dojox.sketch.Anchor");
(function(){
var ta=dojox.sketch;
ta.SingleArrowAnnotation=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=4;
this.textAlign="middle";
this.textYOffset=10;
this.rotation=0;
// this.property('label',this.id);
// this.label=this.id;
this.pathShape=null;
this.arrowhead=null;
this.arrowheadGroup=null;
this.labelShape=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.SingleArrowAnnotation.prototype=new ta.Annotation;
var p=ta.SingleArrowAnnotation.prototype;
p.constructor=ta.SingleArrowAnnotation;
p.type=function(){ return 'SingleArrow'; };
p.getType=function(){ return ta.SingleArrowAnnotation; };
// helper functions
p._rot=function(){
// arrowhead rotation
var opp=this.start.y-this.control.y;
var adj=this.start.x-this.control.x;
if(!adj){ adj=1; }
this.rotation=Math.atan(opp/adj);
};
p._pos=function(){
// text position
var offset=this.textOffset, x=0, y=0;
var slope=this.calculate.slope(this.control, this.end);
if(Math.abs(slope)>=1){
x=this.end.x+this.calculate.dx(this.control, this.end, offset);
if(this.control.y>this.end.y){ y=this.end.y-offset; }
else{ y=this.end.y+offset+this.textYOffset; }
} else if(slope==0){
x=this.end.x+offset;
y=this.end.y+this.textYOffset;
} else {
if(this.start.x>this.end.x){
x=this.end.x-offset;
this.textAlign="end";
} else {
x=this.end.x+offset;
this.textAlign="start";
}
if(this.start.y<this.end.y){
y=this.end.y+this.calculate.dy(this.control, this.end, offset)+this.textYOffset;
} else {
y=this.end.y+this.calculate.dy(this.control, this.end, -offset);
}
}
this.textPosition={ x:x, y:y };
};
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);
}
}
};
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.rotation;
if(this.control.x>=this.end.x&&this.control.x<this.start.x){ rot+=Math.PI; }
var tRot=dojox.gfx.matrix.rotate(rot);
// 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.arrowheadGroup=this.shape.createGroup().setTransform({ dx:this.start.x, dy:this.start.y }).applyTransform(tRot);
this.arrowhead=this.arrowheadGroup.createPath("M0,0 l20,-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'));
};
p.destroy=function(){
if(!this.shape){ return; }
this.arrowheadGroup.remove(this.arrowhead);
this.shape.remove(this.arrowheadGroup);
this.shape.remove(this.pathShape);
this.shape.remove(this.labelShape);
this.figure.group.remove(this.shape);
this.shape=this.pathShape=this.labelShape=this.arrowheadGroup=this.arrowhead=null;
};
p.draw=function(obj){
this.apply(obj);
this._rot();
this._pos();
// rotation matrix
var rot=this.rotation;
if(this.control.x<this.start.x){ rot+=Math.PI; }
var tRot=dojox.gfx.matrix.rotate(rot);
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.arrowheadGroup.setTransform({dx:this.start.x,dy:this.start.y}).applyTransform(tRot);
this.arrowhead.setFill(this.property('fill'));
this.labelShape.setShape({
x:this.textPosition.x,
y:this.textPosition.y,
text:this.property('label'),
align:this.textAlign
})
.setFill(this.property('fill'));
};
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');
var r=this.rotation*(180/Math.PI);
if(this.start.x>this.end.x){ r-=180; }
r=Math.round(r*Math.pow(10,4))/Math.pow(10,4);
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(' + r + ')">'
+ '<path style="fill:'+s.color+';" d="M0,0 l20,-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("SingleArrow");
})();
