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SVG.Gradient = function Gradient(type) {
this.constructor.call(this, SVG.create(type + 'Gradient'));
/* set unique id */
this.attr('id', (this.id = 'svgjs_element_' + (SVG.did++)));
/* store type */
this.type = type;
};
// Inherit from SVG.Element
SVG.Gradient.prototype = new SVG.Element();
// Include the container object
SVG.extend(SVG.Gradient, 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.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(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,
style = '',
attr = ['opacity', 'color'];
/* build style attribute */
for (index = attr.length - 1; index >= 0; index--)
if (o[attr[index]] != null)
style += 'stop-' + attr[index] + ':' + o[attr[index]] + ';';
/* set attributes */
return this.attr({
offset: (o.offset != null ? o.offset : this.attrs.offset || 0) + '%',
style: style
});
}
});
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