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SVG.Gradient = SVG.invent({
// Initialize node
create: function (type) {
this.constructor.call(this, typeof type === 'object' ? type : SVG.create(type + 'Gradient'))
},
// Inherit from
inherit: SVG.Container,
// Add class methods
extend: {
// Add a color stop
stop: function (offset, color, opacity) {
return this.put(new SVG.Stop()).update(offset, color, opacity)
},
// Update gradient
update: function (block) {
// remove all stops
this.clear()
// invoke passed block
if (typeof block === 'function') {
block.call(this, this)
}
return this
},
// Return the fill id
url: function () {
return 'url(#' + this.id() + ')'
},
// Alias string convertion to fill
toString: function () {
return this.url()
},
// custom attr to handle transform
attr: function (a, b, c) {
if (a === 'transform') a = 'gradientTransform'
return SVG.Container.prototype.attr.call(this, a, b, c)
}
},
// Add parent method
construct: {
// Create gradient element in defs
gradient: function (type, block) {
return this.defs().gradient(type, block)
}
}
})
// Add animatable methods to both gradient and fx module
SVG.extend([SVG.Gradient, SVG.FX], {
// From position
from: function (x, y) {
return (this._target || this).type === 'radialGradient'
? this.attr({ fx: new SVG.Number(x), fy: new SVG.Number(y) })
: this.attr({ x1: new SVG.Number(x), y1: new SVG.Number(y) })
},
// To position
to: function (x, y) {
return (this._target || this).type === 'radialGradient'
? this.attr({ cx: new SVG.Number(x), cy: new SVG.Number(y) })
: this.attr({ x2: new SVG.Number(x), y2: new SVG.Number(y) })
}
})
// Base gradient generation
SVG.extend(SVG.Defs, {
// define gradient
gradient: function (type, block) {
return this.put(new SVG.Gradient(type)).update(block)
}
})
SVG.Stop = SVG.invent({
// Initialize node
create: 'stop',
// Inherit from
inherit: SVG.Element,
// Add class methods
extend: {
// add color stops
update: function (o) {
if (typeof o === 'number' || o instanceof SVG.Number) {
o = {
offset: arguments[0],
color: arguments[1],
opacity: arguments[2]
}
}
// set attributes
if (o.opacity != null) this.attr('stop-opacity', o.opacity)
if (o.color != null) this.attr('stop-color', o.color)
if (o.offset != null) this.attr('offset', new SVG.Number(o.offset))
return this
}
}
})
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