root / trunk / web / dojo / dojox / gfx / gradient.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.gfx.gradient"]){ |
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dojo._hasResource["dojox.gfx.gradient"]=true; |
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dojo.provide("dojox.gfx.gradient");
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dojo.require("dojox.gfx.matrix");
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(function(){
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var d=dojo,m=dojox.gfx.matrix,C=d.Color;
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dojox.gfx.gradient.rescale=function(_1,_2,to){ |
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var _3=_1.length,_4=(to<_2),_5;
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if(_4){
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var _6=_2;
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_2=to; |
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to=_6; |
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} |
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if(!_3){
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return [];
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} |
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if(to<=_1[0].offset){ |
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_5=[{offset:0,color:_1[0].color},{offset:1,color:_1[0].color}];
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}else{
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if(_2>=_1[_3-1].offset){ |
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_5=[{offset:0,color:_1[_3-1].color},{offset:1,color:_1[_3-1].color}];
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}else{
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var _7=to-_2,_8,_9,i;
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_5=[]; |
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if(_2<0){ |
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_5.push({offset:0,color:new C(_1[0].color)});
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} |
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for(i=0;i<_3;++i){ |
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_8=_1[i]; |
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if(_8.offset>=_2){
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break;
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} |
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} |
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if(i){
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_9=_1[i-1];
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_5.push({offset:0,color:d.blendColors(new C(_9.color),new C(_8.color),(_2-_9.offset)/(_8.offset-_9.offset))});
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}else{
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_5.push({offset:0,color:new C(_8.color)});
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} |
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for(;i<_3;++i){
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_8=_1[i]; |
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if(_8.offset>=to){
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break;
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} |
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_5.push({offset:(_8.offset-_2)/_7,color:new C(_8.color)});
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} |
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if(i<_3){
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_9=_1[i-1];
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_5.push({offset:1,color:d.blendColors(new C(_9.color),new C(_8.color),(to-_9.offset)/(_8.offset-_9.offset))});
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}else{
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_5.push({offset:1,color:new C(_1[_3-1].color)});
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} |
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} |
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} |
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if(_4){
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_5.reverse(); |
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for(i=0,_3=_5.length;i<_3;++i){ |
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_8=_5[i]; |
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_8.offset=1-_8.offset;
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} |
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} |
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return _5;
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}; |
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function _a(x,y,_b,_c,_d,_e){ |
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var r=m.multiplyPoint(_b,x,y),p=m.multiplyPoint(_c,r);
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return {r:r,p:p,o:m.multiplyPoint(_d,p).x/_e}; |
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}; |
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function _f(a,b){ |
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return a.o-b.o;
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}; |
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dojox.gfx.gradient.project=function(_10,_11,tl,rb,ttl,trb){ |
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_10=_10||m.identity; |
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var f1=m.multiplyPoint(_10,_11.x1,_11.y1),f2=m.multiplyPoint(_10,_11.x2,_11.y2),_12=Math.atan2(f2.y-f1.y,f2.x-f1.x),_13=m.project(f2.x-f1.x,f2.y-f1.y),pf1=m.multiplyPoint(_13,f1),pf2=m.multiplyPoint(_13,f2),_14=new m.Matrix2D([m.rotate(-_12),{dx:-pf1.x,dy:-pf1.y}]),_15=m.multiplyPoint(_14,pf2).x,_16=[_a(tl.x,tl.y,_10,_13,_14,_15),_a(rb.x,rb.y,_10,_13,_14,_15),_a(tl.x,rb.y,_10,_13,_14,_15),_a(rb.x,tl.y,_10,_13,_14,_15)].sort(_f),_17=_16[0].o,to=_16[3].o,_18=dojox.gfx.gradient.rescale(_11.colors,_17,to),_19=Math.atan2(_16[3].r.y-_16[0].r.y,_16[3].r.x-_16[0].r.x); |
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return {type:"linear",x1:_16[0].p.x,y1:_16[0].p.y,x2:_16[3].p.x,y2:_16[3].p.y,colors:_18,angle:_12}; |
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}; |
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})(); |
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} |