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// initialize id sequence
var gradID = 0;
SVG.Gradient = function Gradient(t) {
this.constructor.call(this, SVG.create(t + 'Gradient'));
this.id = 'svgjs_grad_' + (gradID++);
this.type = t;
this.attr('id', this.id);
};
// inherit from SVG.Element
SVG.Gradient.prototype = new SVG.Element();
// include the container object
SVG.extend(SVG.Gradient, SVG.Container);
// add gradient-specific functions
SVG.extend(SVG.Gradient, {
// from position
from: function(x, y) {
return this.type == 'radial' ?
this.attr({ fx: x + '%', fy: y + '%' }) :
this.attr({ x1: x + '%', y1: y + '%' });
},
// to position
to: function(x, y) {
return this.type == 'radial' ?
this.attr({ cx: x + '%', cy: y + '%' }) :
this.attr({ x2: x + '%', y2: y + '%' });
},
// radius for radial gradient
radius: function(r) {
return this.type == 'radial' ?
this.attr({ r: r + '%' }) :
this;
},
// add color stops
at: function(o) {
var m = new SVG.Stop(o);
this.add(m);
return m;
},
// update gradient
update: function(b) {
while (this.node.hasChildNodes())
this.node.removeChild(this.node.lastChild);
b(this);
return this;
},
// return the fill id
fill: function() {
return 'url(#' + this.id + ')';
}
});
// add def-specific functions
SVG.extend(SVG.Defs, {
// define clippath
gradient: function(t, b) {
var e = new SVG.Gradient(t);
this.add(e);
b(e);
return e;
}
});
SVG.Stop = function Stop(o) {
this.constructor.call(this, SVG.create('stop'));
this.update(o);
};
// inherit from SVG.Element
SVG.Stop.prototype = new SVG.Element();
// add mark-specific functions
SVG.extend(SVG.Stop, {
// add color stops
update: function(o) {
var s = '',
a = ['opacity', 'color'];
for (var i = a.length - 1; i >= 0; i--)
if (o[a[i]] != null)
s += 'stop-' + a[i] + ':' + o[a[i]] + ';';
return this.attr({
offset: (o.offset != null ? o.offset : this.attr('offset') || 0) + '%',
style: s
});
}
});
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