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Filename : sankey.js
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/* ------------------------------------------------------------------------------
 *
 *  # Google Visualization - sankey diagram
 *
 *  Google Visualization sankey diagram demonstration
 *
 * ---------------------------------------------------------------------------- */


// Setup module
// ------------------------------

var GoogleSankeyBasic = function() {


    //
    // Setup module components
    //

    // Sankey diagram
    var _googleSankeyBasic = function() {
        if (typeof google == 'undefined') {
            console.warn('Warning - Google Charts library is not loaded.');
            return;
        }

        // Initialize chart
        google.charts.load('current', {
            callback: function () {

                // Draw chart
                drawSankey();

                // Resize on sidebar width change
                $(document).on('click', '.sidebar-control', drawSankey);

                // Resize on window resize
                var resizeSankeyBasic;
                $(window).on('resize', function() {
                    clearTimeout(resizeSankeyBasic);
                    resizeSankeyBasic = setTimeout(function () {
                        drawSankey();
                    }, 200);
                });
            },
            packages: ['corechart', 'sankey']
        });

        // Chart settings
        function drawSankey() {

            // Define charts element
            var sankey_chart_element = document.getElementById('google-sankey');

            // Data
            var data = new google.visualization.DataTable();
            data.addColumn('string', 'From');
            data.addColumn('string', 'To');
            data.addColumn('number', 'Weight');
            data.addRows([
                [ 'Brazil', 'Portugal', 4 ],
                [ 'Brazil', 'France', 1 ],
                [ 'Brazil', 'Spain', 1 ],
                [ 'Brazil', 'England', 1 ],
                [ 'Canada', 'Portugal', 1 ],
                [ 'Canada', 'France', 4 ],
                [ 'Canada', 'England', 1 ],
                [ 'Mexico', 'Portugal', 1 ],
                [ 'Mexico', 'France', 1 ],
                [ 'Mexico', 'Spain', 4 ],
                [ 'Mexico', 'England', 1 ],
                [ 'USA', 'Portugal', 1 ],
                [ 'USA', 'France', 1 ],
                [ 'USA', 'Spain', 1 ],
                [ 'USA', 'England', 4 ],
                [ 'Portugal', 'Angola', 2 ],
                [ 'Portugal', 'Senegal', 1 ],
                [ 'Portugal', 'Morocco', 1 ],
                [ 'Portugal', 'South Africa', 3 ],
                [ 'France', 'Angola', 1 ],
                [ 'France', 'Mali', 3 ],
                [ 'France', 'Morocco', 3 ],
                [ 'France', 'South Africa', 1 ],
                [ 'Spain', 'Senegal', 1 ],
                [ 'Spain', 'Morocco', 3 ],
                [ 'Spain', 'South Africa', 1 ],
                [ 'England', 'Angola', 1 ],
                [ 'England', 'Senegal', 1 ],
                [ 'England', 'Morocco', 2 ],
                [ 'England', 'South Africa', 4 ],
                [ 'South Africa', 'India', 1 ],
                [ 'South Africa', 'Japan', 3 ],
                [ 'Angola', 'China', 2 ],
                [ 'Angola', 'India', 1 ],
                [ 'Angola', 'Japan', 3 ],
                [ 'Senegal', 'China', 2 ],
                [ 'Senegal', 'India', 1 ],
                [ 'Senegal', 'Japan', 3 ],
                [ 'Mali', 'China', 2 ],
                [ 'Mali', 'India', 1 ],
                [ 'Mali', 'Japan', 3 ],
                [ 'Morocco', 'China', 2 ],
                [ 'Morocco', 'India', 1 ],
                [ 'Morocco', 'Japan', 3 ],
                [ 'Morocco', 'Senegal', 1 ]
            ]);

            // Options
            var options = {
                height: 600,
                sankey: { 
                    link: {
                        color: {
                            fill: '#eee',
                            fillOpacity: 0.3
                        }
                    },
                    node: {
                        width: 8,
                        nodePadding: 80,
                        label: {
                            fontName: 'Roboto',
                            fontSize: 13
                        } 
                    } 
                },
            };

            // Draw chart
            var chart = new google.visualization.Sankey(sankey_chart_element);
            chart.draw(data, options);
        }
    };


    //
    // Return objects assigned to module
    //

    return {
        init: function() {
            _googleSankeyBasic();
        }
    }
}();


// Initialize module
// ------------------------------

GoogleSankeyBasic.init();