source: Dev/trunk/src/client/dojox/drawing/tools/Ellipse.js

define(["dojo/_base/lang", "../util/oo", "../manager/_registry", "../stencil/Ellipse"],
function(lang, oo, registry, StencilEllipse){

//dojox.drawing.tools.Ellipse = 
var Ellipse = oo.declare(
        StencilEllipse,
        function(){
                // summary:
                //              constructor
        },
        {
                // summary:
                //              A drawable Ellipse.

                draws:true,
                onDrag: function(/*EventObject*/obj){
                        var s = obj.start, e = obj;
                        var     x = s.x < e.x ? s.x : e.x,
                                y = s.y < e.y ? s.y : e.y,
                                w = s.x < e.x ? e.x-s.x : s.x-e.x,
                                h = s.y < e.y ? e.y-s.y : s.y-e.y;
                        
                        if(this.keys.shift){ w = h = Math.max(w,h); }
                        if(!this.keys.alt){ // ellipse is normally on center
                                x+=w/2; y+=h/2; w/=2; h/=2;
                        } else{
                                if(y - h < 0){ h = y; }
                                if(x - w < 0){ w = x; }
                        }
                        
                        this.points = [
                                {x:x-w, y:y-h},         // TL
                                {x:x+w, y:y-h},         // TR
                                {x:x+w, y:y+h},         // BR
                                {x:x-w, y:y+h}          // BL
                        ];
                        this.render();
                },
                
                onUp: function(/*EventObject*/obj){
                        if(this.created || !this._downOnCanvas){ return; }
                        this._downOnCanvas = false;
                        //Default shape on single click
                        if(!this.shape){
                                var s = obj.start, e = this.minimumSize*2;
                                this.data = {
                                        cx: s.x+e,
                                        cy: s.y+e,
                                        rx: e,
                                        ry: e
                                };
                                this.dataToPoints();
                                this.render();
                        }else{
                        // if too small, need to reset
                                var o = this.pointsToData();
                                console.log("Create a default shape here, pt to data: ",o);
                                if(o.rx*2<this.minimumSize && o.ry*2 < this.minimumSize){
                                        this.remove(this.shape, this.hit);
                                        return;
                                }
                        }
                        
                        this.onRender(this);
                        
                }
        }
);

lang.setObject("dojox.drawing.tools.Ellipse", Ellipse);
Ellipse.setup = {
        name:"dojox.drawing.tools.Ellipse",
        tooltip:"Ellipse Tool",
        iconClass:"iconEllipse"
};

registry.register(Ellipse.setup, "tool");

return Ellipse;
});