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SVG.Marker = SVG.invent({
// Initialize node
create: 'marker'
// Inherit from
, inherit: SVG.Container
// Add class methods
, extend: {
// Set width of element
width: function(width) {
return this.attr('markerWidth', width)
}
// Set height of element
, height: function(height) {
return this.attr('markerHeight', height)
}
// Set marker refX and refY
, ref: function(x, y) {
return this.attr('refX', x).attr('refY', y)
}
// Update marker
, update: function(block) {
// remove all content
this.clear()
// invoke passed block
if (typeof block == 'function')
block.call(this, this)
return this
}
// Return the fill id
, toString: function() {
return 'url(#' + this.id() + ')'
}
}
// Add parent method
, construct: {
marker: function(width, height, block) {
// Create marker element in defs
return this.defs().marker(width, height, block)
}
}
})
SVG.extend(SVG.Defs, {
// Create marker
marker: function(width, height, block) {
// Set default viewbox to match the width and height, set ref to cx and cy and set orient to auto
return this.put(new SVG.Marker)
.size(width, height)
.ref(width / 2, height / 2)
.viewbox(0, 0, width, height)
.attr('orient', 'auto')
.update(block)
}
})
SVG.extend([SVG.Line, SVG.Polyline, SVG.Polygon, SVG.Path], {
// Create and attach markers
marker: function(marker, width, height, block) {
var attr = ['marker']
// Build attribute name
if (marker != 'all') attr.push(marker)
attr = attr.join('-')
// Set marker attribute
marker = arguments[1] instanceof SVG.Marker ?
arguments[1] :
this.doc().marker(width, height, block)
return this.attr(attr, marker)
}
})
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