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SVG.Gradient = function(type) {
this.constructor.call(this, SVG.create(type + 'Gradient'))
/* store type */
this.type = type
}
// Inherit from SVG.Container
SVG.Gradient.prototype = new SVG.Container
//
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(radius) {
return this.type == 'radial' ?
this.attr({ r: radius + '%' }) :
this
}
// Add a color stop
, at: function(stop) {
return this.put(new SVG.Stop(stop))
}
// Update gradient
, update: function(block) {
/* remove all stops */
while (this.node.hasChildNodes())
this.node.removeChild(this.node.lastChild)
/* invoke passed block */
block(this)
return this
}
// Return the fill id
, fill: function() {
return 'url(#' + this.attr('id') + ')'
}
})
//
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 = function(stop) {
this.constructor.call(this, SVG.create('stop'))
/* immediatelly build stop */
this.update(stop)
}
// Inherit from SVG.Element
SVG.Stop.prototype = new SVG.Element()
//
SVG.extend(SVG.Stop, {
// add color stops
update: function(o) {
var index
, attr = ['opacity', 'color']
/* build style attribute */
for (index = attr.length - 1; index >= 0; index--)
if (o[attr[index]] != null)
this.style('stop-' + attr[index], o[attr[index]])
/* set attributes */
return this.attr('offset', (o.offset != null ? o.offset : this.attr('offset')) + '%')
}
})
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