root / trunk / web / dojo / dojox / drawing / util / common.js @ 12
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/*
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Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
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Available via Academic Free License >= 2.1 OR the modified BSD license.
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see: http://dojotoolkit.org/license for details
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*/
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if(!dojo._hasResource["dojox.drawing.util.common"]){ |
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dojo._hasResource["dojox.drawing.util.common"]=true; |
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dojo.provide("dojox.drawing.util.common");
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dojo.require("dojox.math.round");
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(function(){
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var _1={};
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var _2=0; |
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dojox.drawing.util.common={radToDeg:function(n){
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return (n*180)/Math.PI; |
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},degToRad:function(n){ |
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return (n*Math.PI)/180; |
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},angle:function(_3,_4){ |
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if(_4){
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_4=_4/180;
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var _5=this.radians(_3),_6=Math.PI*_4,_7=dojox.math.round(_5/_6),_8=_7*_6; |
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return dojox.math.round(this.radToDeg(_8)); |
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}else{
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return this.radToDeg(this.radians(_3)); |
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} |
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},oppAngle:function(_9){ |
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(_9+=180)>360?_9=_9-360:_9; |
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return _9;
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},radians:function(o){ |
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return Math.atan2(o.start.y-o.y,o.x-o.start.x);
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},length:function(o){ |
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return Math.sqrt(Math.pow(o.start.x-o.x,2)+Math.pow(o.start.y-o.y,2)); |
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},lineSub:function(x1,y1,x2,y2,_a){ |
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var _b=this.distance(this.argsToObj.apply(this,arguments)); |
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_b=_b<_a?_a:_b; |
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var pc=(_b-_a)/_b;
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var x=x1-(x1-x2)*pc;
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var y=y1-(y1-y2)*pc;
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return {x:x,y:y}; |
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},argsToObj:function(){ |
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var a=arguments; |
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if(a.length<4){ |
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return a[0]; |
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} |
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return {start:{x:a[0],y:a[1]},x:a[2],y:a[3]}; |
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},distance:function(){ |
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var o=this.argsToObj.apply(this,arguments); |
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return Math.abs(Math.sqrt(Math.pow(o.start.x-o.x,2)+Math.pow(o.start.y-o.y,2))); |
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},slope:function(p1,p2){ |
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if(!(p1.x-p2.x)){
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return 0; |
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} |
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return ((p1.y-p2.y)/(p1.x-p2.x));
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},pointOnCircle:function(cx,cy,_c,_d){ |
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var _e=_d*Math.PI/180; |
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var x=_c*Math.cos(_e);
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var y=_c*Math.sin(_e);
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return {x:cx+x,y:cy-y}; |
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},constrainAngle:function(_f,min,max){ |
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var _10=this.angle(_f); |
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if(_10>=min&&_10<=max){
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return _f;
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} |
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var _11=this.length(_f); |
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var _12=_10>max?max:min-_10<100?min:max; |
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return this.pointOnCircle(_f.start.x,_f.start.y,_11,_12); |
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},snapAngle:function(obj,ca){ |
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var _13=this.radians(obj),_14=this.length(obj),seg=Math.PI*ca,rnd=Math.round(_13/seg),_15=rnd*seg,_16=this.radToDeg(_15),pt=this.pointOnCircle(obj.start.x,obj.start.y,_14,_16); |
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return pt;
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},idSetStart:function(num){ |
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_2=num; |
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},uid:function(str){ |
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str=str||"shape";
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_1[str]=_1[str]===undefined?_2:_1[str]+1; |
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return str+_1[str];
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},abbr:function(_17){ |
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return _17.substring(_17.lastIndexOf(".")+1).charAt(0).toLowerCase()+_17.substring(_17.lastIndexOf(".")+2); |
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},mixin:function(o1,o2){ |
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},objects:{},register:function(obj){ |
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this.objects[obj.id]=obj;
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},byId:function(id){ |
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return this.objects[id]; |
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},attr:function(_18,_19,_1a,_1b){ |
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if(!_18){
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return false; |
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} |
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try{
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if(_18.shape&&_18.util){
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_18=_18.shape; |
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} |
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if(!_1a&&_19=="id"&&_18.target){ |
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var n=_18.target;
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while(!dojo.attr(n,"id")){ |
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n=n.parentNode; |
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} |
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return dojo.attr(n,"id"); |
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} |
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if(_18.rawNode||_18.target){
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var _1c=Array.prototype.slice.call(arguments); |
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_1c[0]=_18.rawNode||_18.target;
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return dojo.attr.apply(dojo,_1c);
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} |
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return dojo.attr(_18,"id"); |
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} |
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catch(e){
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if(!_1b){
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} |
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return false; |
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} |
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}}; |
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})(); |
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} |