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Viewing file:     marker.js (1.89 KB)      -rwxrwxr-x

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)
  }
  
})