/*
 * jQuery gvChart plugin
 * This plugin was created to simplify things when using Google Visualisation Charts. 
 * It still needs to be used with google script import tag, however now you can
 * crate chart from your table. 
 * All examples you will find on http://www.ivellios.toron.pl/technikalia/demos/gvChart/
 * @name jquery.gvChart-1.0.1.js
 * @author Janusz Kamieński - http://www.ivellios.toron.pl/technikalia
 * @version 1.0.1
 * @date December 04, 2010
 * @category jQuery plugin google charts
 * @copyright (c) 2010 Janusz Kamieński (www.ivellios.toron.pl)
 * @license CC Attribution Works 3.0 Poland - http://creativecommons.org/licenses/by/3.0/pl/deed.en_US
 * @example Visit http://www.ivellios.toron.pl/technikalia/demos/gvChart/ for more informations about this jQuery plugin
 */
(function (jQuery) {
    jQuery.fn.gvChart = function (settings) {

        defaults = {
            hideTable: true,
            chartType: 'AreaChart',
            chartDivID: 'gvChartDiv',
            gvSettings: null
        };

        var el = document.createElement('div');
        jQuery(el).insertBefore(this);
        gvChartCount++;
        gvChartID = defaults.chartDivID + gvChartCount;
        jQuery(el).attr('id', gvChartID);
        jQuery(el).addClass('gvChart');

        if (settings) {
            jQuery.extend(defaults, settings);
        }

        if (defaults.hideTable)
            $(this).hide();

        var data = new google.visualization.DataTable();

        // add X label
        data.addColumn('string', 'X labels');

        var a = new Array();

        var headers = $(this).find('thead').find('th');
        var rows = $(this).find('tbody').find('tr');

        rows.each(function (index) {
            data.addColumn('number', $(this).find('th').text());
        });

        data.addRows(headers.length - 1);

        headers.each(function (index) {
            if (index) {
                data.setCell(index - 1, 0, $(this).text());
            }
        });

        rows.each(function (index) {
            $(this).find('td').each(function (index2) {
                data.setCell(index2, index + 1, Number($(this).text()));
            });
        });

        var formatter = new google.visualization.NumberFormat(defaults.numberFormat);

        formatter.format(data, 1);

        chartSettings = {
            title: $(this).find('caption').text()
        };

        if (defaults.gvSettings) {
            jQuery.extend(chartSettings, defaults.gvSettings);
        }

        eval("var chart = new google.visualization." + defaults.chartType + "(document.getElementById('" + gvChartID + "'))");

        chart.draw(data, chartSettings);
    }
})(jQuery);


function gvChartInit(){
	gvChartCount = 0;
	google.load('visualization', '1', {packages: ['corechart']});
}