root / trunk / web / dojo / dojox / gfx / gradient.js
History | View | Annotate | Download (2.36 KB)
| 1 |
/*
|
|---|---|
| 2 |
Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
|
| 3 |
Available via Academic Free License >= 2.1 OR the modified BSD license.
|
| 4 |
see: http://dojotoolkit.org/license for details
|
| 5 |
*/
|
| 6 |
|
| 7 |
|
| 8 |
if(!dojo._hasResource["dojox.gfx.gradient"]){ |
| 9 |
dojo._hasResource["dojox.gfx.gradient"]=true; |
| 10 |
dojo.provide("dojox.gfx.gradient");
|
| 11 |
dojo.require("dojox.gfx.matrix");
|
| 12 |
(function(){
|
| 13 |
var d=dojo,m=dojox.gfx.matrix,C=d.Color;
|
| 14 |
dojox.gfx.gradient.rescale=function(_1,_2,to){ |
| 15 |
var _3=_1.length,_4=(to<_2),_5;
|
| 16 |
if(_4){
|
| 17 |
var _6=_2;
|
| 18 |
_2=to; |
| 19 |
to=_6; |
| 20 |
} |
| 21 |
if(!_3){
|
| 22 |
return [];
|
| 23 |
} |
| 24 |
if(to<=_1[0].offset){ |
| 25 |
_5=[{offset:0,color:_1[0].color},{offset:1,color:_1[0].color}];
|
| 26 |
}else{
|
| 27 |
if(_2>=_1[_3-1].offset){ |
| 28 |
_5=[{offset:0,color:_1[_3-1].color},{offset:1,color:_1[_3-1].color}];
|
| 29 |
}else{
|
| 30 |
var _7=to-_2,_8,_9,i;
|
| 31 |
_5=[]; |
| 32 |
if(_2<0){ |
| 33 |
_5.push({offset:0,color:new C(_1[0].color)});
|
| 34 |
} |
| 35 |
for(i=0;i<_3;++i){ |
| 36 |
_8=_1[i]; |
| 37 |
if(_8.offset>=_2){
|
| 38 |
break;
|
| 39 |
} |
| 40 |
} |
| 41 |
if(i){
|
| 42 |
_9=_1[i-1];
|
| 43 |
_5.push({offset:0,color:d.blendColors(new C(_9.color),new C(_8.color),(_2-_9.offset)/(_8.offset-_9.offset))});
|
| 44 |
}else{
|
| 45 |
_5.push({offset:0,color:new C(_8.color)});
|
| 46 |
} |
| 47 |
for(;i<_3;++i){
|
| 48 |
_8=_1[i]; |
| 49 |
if(_8.offset>=to){
|
| 50 |
break;
|
| 51 |
} |
| 52 |
_5.push({offset:(_8.offset-_2)/_7,color:new C(_8.color)});
|
| 53 |
} |
| 54 |
if(i<_3){
|
| 55 |
_9=_1[i-1];
|
| 56 |
_5.push({offset:1,color:d.blendColors(new C(_9.color),new C(_8.color),(to-_9.offset)/(_8.offset-_9.offset))});
|
| 57 |
}else{
|
| 58 |
_5.push({offset:1,color:new C(_1[_3-1].color)});
|
| 59 |
} |
| 60 |
} |
| 61 |
} |
| 62 |
if(_4){
|
| 63 |
_5.reverse(); |
| 64 |
for(i=0,_3=_5.length;i<_3;++i){ |
| 65 |
_8=_5[i]; |
| 66 |
_8.offset=1-_8.offset;
|
| 67 |
} |
| 68 |
} |
| 69 |
return _5;
|
| 70 |
}; |
| 71 |
function _a(x,y,_b,_c,_d,_e){ |
| 72 |
var r=m.multiplyPoint(_b,x,y),p=m.multiplyPoint(_c,r);
|
| 73 |
return {r:r,p:p,o:m.multiplyPoint(_d,p).x/_e}; |
| 74 |
}; |
| 75 |
function _f(a,b){ |
| 76 |
return a.o-b.o;
|
| 77 |
}; |
| 78 |
dojox.gfx.gradient.project=function(_10,_11,tl,rb,ttl,trb){ |
| 79 |
_10=_10||m.identity; |
| 80 |
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); |
| 81 |
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}; |
| 82 |
}; |
| 83 |
})(); |
| 84 |
} |