source: Dev/trunk/src/client/dojox/drawing/tools/Arrow.js @ 529

define(["dojo/_base/lang", "../util/oo", "../manager/_registry", "./Line", 
"../annotations/Arrow", "../util/positioning"],
function(lang, oo, registry, Line, AnnotationArrow, positioning){

var Arrow = oo.declare(
        Line,
        function(options){
                // summary:
                //              constructor
                if(this.arrowStart){
                        this.begArrow = new AnnotationArrow({stencil:this, idx1:0, idx2:1});
                }
                if(this.arrowEnd){
                        this.endArrow = new AnnotationArrow({stencil:this, idx1:1, idx2:0});
                }
                if(this.points.length){
                        // This is protecting against cases when there are no points
                        // not sure how that would ever happen
                        // Render & label here instead of in base because of Arrow annotation
                        this.render();
                        options.label && this.setLabel(options.label);
                }
        },
        {
                // summary:
                //              Extends stencil.Line and adds an arrow head
                //              to the end and or start.

                draws:true,
                type:"dojox.drawing.tools.Arrow",
                baseRender:false,
                
                // arrowStart: Boolean
                //              Whether or not to place an arrow on start.
                arrowStart:false,

                // arrowEnd: Boolean
                //              Whether or not to place an arrow on end.
                arrowEnd:true,
                
                labelPosition: function(){
                        // summary:
                        //              The custom position used for the label

                        var d = this.data;
                        var pt = positioning.label({x:d.x1,y:d.y1},{x:d.x2,y:d.y2});
                        return {
                                x:pt.x,
                                y:pt.y
                        }
                },
                
                onUp: function(/*EventObject*/obj){
                        if(this.created || !this.shape){ return; }
                        
                        // if too small, need to reset
                        var p = this.points;
                        var len = this.util.distance(p[0].x,p[0].y,p[1].x,p[1].y);
                        if(len<this.minimumSize){
                                this.remove(this.shape, this.hit);
                                return;
                        }
                        
                        var pt = this.util.snapAngle(obj, this.angleSnap/180);
                        this.setPoints([
                                {x:p[0].x, y:p[0].y},
                                {x:pt.x, y:pt.y}
                        ]);
                        
                        this.renderedOnce = true;
                        this.onRender(this);
                }
        }
);

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

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

return Arrow;
});