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SVG.Gradient = SVG.invent({
// Initialize node
create: function(type) {
this.constructor.call(this, SVG.create(type + 'Gradient'))
/* store type */
this.type = type
}
// Inherit from
, inherit: SVG.Container
// Add class methods
, extend: {
// From position
from: function(x, y) {
return this.type == 'radial' ?
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.type == 'radial' ?
this.attr({ cx: new SVG.Number(x), cy: new SVG.Number(y) }) :
this.attr({ x2: new SVG.Number(x), y2: new SVG.Number(y) })
}
// Radius for radial gradient
, radius: function(r) {
return this.type == 'radial' ?
this.attr({ r: new SVG.Number(r) }) :
this
}
// Add a color stop
, at: function(stop) {
return this.put(new SVG.Stop().update(stop))
}
// Update gradient
, update: function(block) {
/* remove all stops */
this.clear()
/* invoke passed block */
block(this)
return this
}
// Return the fill id
, fill: function() {
return 'url(#' + this.attr('id') + ')'
}
// Alias string convertion to fill
, toString: function() {
return this.fill()
}
}
// Add parent method
, construct: {
// Create gradient element in defs
gradient: function(type, block) {
return this.defs().gradient(type, block)
}
}
})
SVG.extend(SVG.Defs, {
// define gradient
gradient: function(type, block) {
var element = this.put(new SVG.Gradient(type))
/* invoke passed block */
block(element)
return element
}
})
SVG.Stop = SVG.invent({
// Initialize node
create: 'stop'
// Inherit from
, inherit: SVG.Element
// Add class methods
, extend: {
// add color stops
update: function(o) {
/* 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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