/**
 * An animated, rotating cloud of words, based on flash
 *
 * Usage prequisities:
 * - Include the js files http://word-cumulus-goog-vis.googlecode.com/svn/trunk/swfobject.js
 * and http://word-cumulus-goog-vis.googlecode.com/svn/trunk/wordcumulus.js
 *
 * Options:
 * - text_color (e.g., '#ff0000')
 * - hover_text_color
 * - height (in px, default = 300)
 * - width (in px, default = 400)
 * - speed (default = 100, higher means faster rotation)
 */

var gviz_word_cumulus = {};

gviz_word_cumulus.WordCumulus = function(container) {

  /**
   * The container on which to draw this chart.
   * @type {Element}
   * @private
   */
  this.container_ = container;
};


gviz_word_cumulus.WordCumulus.prototype.draw = function(data, options) {
  this.data_ = data;
  options = options || {};
  var url = "http://word-cumulus-goog-vis.googlecode.com/svn/trunk/tagcloud.swf";
  var params = {};

  var attributes = {};
  attributes['allowScriptAccess'] = 'always';
  attributes['wmode'] = 'transparent'; // To resolve z-index issue on FF.
  attributes['id'] = this.container_.id;

  var flashvars = {
    'mode' : 'tags',
    'distr' : 'false',
    'tcolor' : (options.text_color || '#ff0000').replace('#', '0x'),
    'hcolor' : (options.hover_text_color || '#000000').replace('#','0x'),
    'speed' : (options.speed || 100)
  };
  var tags_xml = "<tags>";
  for (var row = 0; row < data.getNumberOfRows(); row++) {
    var label = data.getFormattedValue(row, 0);
    var uri = data.getFormattedValue(row, 1);
    var font_size = 10;
    if (data.getNumberOfColumns() > 2) {
      font_size = data.getFormattedValue(row, 2);
    }
    var tag = "<a href='" + uri + "' target='_blank' style='font-size:" +  String(font_size) + "pt;'>" + label + "</a>";
    tags_xml = tags_xml + tag;
  }
  tags_xml = tags_xml + "</tags>";
  flashvars["tagcloud"] = tags_xml;
  swfobject.embedSWF(url, this.container_.id, (options.width || 400), (options.height || 300), '10', '', flashvars, params,
      attributes);

};