bars_basic_tooltip.js 5.64 KB
Newer Older
Indra Raja's avatar
Indra Raja committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209
/* ------------------------------------------------------------------------------
 *
 *  # D3.js - bar chart with tooltip
 *
 *  Demo d3.js bar chart setup with tooltip and .tsv data source
 *
 *  Version: 1.0
 *  Latest update: August 1, 2015
 *
 * ---------------------------------------------------------------------------- */

$(function () {

    // Initialize chart
    barTooltip('#d3-bar-tooltip', 400);

    // Chart setup
    function barTooltip(element, height) {


        // Basic setup
        // ------------------------------

        // Define main variables
        var d3Container = d3.select(element),
            margin = {top: 5, right: 10, bottom: 20, left: 40},
            width = d3Container.node().getBoundingClientRect().width - margin.left - margin.right,
            height = height - margin.top - margin.bottom - 5;



        // Construct scales
        // ------------------------------

        // Horizontal
        var x = d3.scale.ordinal()
            .rangeRoundBands([0, width], .1, .5);

        // Vertical
        var y = d3.scale.linear()
            .range([height, 0]);

        // Color
        var color = d3.scale.category20c();



        // Create axes
        // ------------------------------

        // Horizontal
        var xAxis = d3.svg.axis()
            .scale(x)
            .orient("bottom");

        // Vertical
        var yAxis = d3.svg.axis()
            .scale(y)
            .orient("left")
            .ticks(10, "%");



        // Create chart
        // ------------------------------

        // Add SVG element
        var container = d3Container.append("svg");

        // Add SVG group
        var svg = container
            .attr("width", width + margin.left + margin.right)
            .attr("height", height + margin.top + margin.bottom)
            .append("g")
                .attr("transform", "translate(" + margin.left + "," + margin.top + ")");



        // Create tooltip
        // ------------------------------

        // Create tooltip
        var tip = d3.tip()
            .attr('class', 'd3-tip')
            .offset([-10, 0])
            .html(function(d) {
                return d.frequency;
            });

        // Initialize tooltip
        svg.call(tip);



        // Load data
        // ------------------------------

        d3.tsv("assets/demo_data/d3/bars/bars_tooltip.tsv", function(error, data) {

            // Pull out values
            data.forEach(function(d) {
                d.frequency = +d.frequency;
            });


            // Set input domains
            // ------------------------------

            // Horizontal
            x.domain(data.map(function(d) { return d.letter; }));

            // Vertical
            y.domain([0, d3.max(data, function(d) { return d.frequency; })]);


            //
            // Append chart elements
            //

            // Append axes
            // ------------------------------

            // Horizontal
            svg.append("g")
                .attr("class", "d3-axis d3-axis-horizontal d3-axis-strong")
                .attr("transform", "translate(0," + height + ")")
                .call(xAxis);

            // Vertical
            var verticalAxis = svg.append("g")
                .attr("class", "d3-axis d3-axis-vertical d3-axis-strong")
                .call(yAxis);

            // Add text label
            verticalAxis.append("text")
                .attr("transform", "rotate(-90)")
                .attr("y", 10)
                .attr("dy", ".71em")
                .style("text-anchor", "end")
                .style("fill", "#999")
                .style("font-size", 12)
                .text("Frequency");


            // Append bars
            svg.selectAll(".d3-bar")
                .data(data)
                .enter()
                .append("rect")
                    .attr("class", "d3-bar")
                    .style("fill", function(d) { return color(d.letter); })
                    .attr("x", function(d) { return x(d.letter); })
                    .attr("width", x.rangeBand())
                    .attr("y", function(d) { return y(d.frequency); })
                    .attr("height", function(d) { return height - y(d.frequency); })
                    .on('mouseover', tip.attr('class', 'tooltip-inner in').show)
                    .on('mouseout', tip.hide);
        });



        // Resize chart
        // ------------------------------

        // Call function on window resize
        $(window).on('resize', resize);

        // Call function on sidebar width change
        $('.sidebar-control').on('click', resize);

        // Resize function
        // 
        // Since D3 doesn't support SVG resize by default,
        // we need to manually specify parts of the graph that need to 
        // be updated on window resize
        function resize() {

            // Layout variables
            width = d3Container.node().getBoundingClientRect().width - margin.left - margin.right;


            // Layout
            // -------------------------

            // Main svg width
            container.attr("width", width + margin.left + margin.right);

            // Width of appended group
            svg.attr("width", width + margin.left + margin.right);


            // Axes
            // -------------------------

            // Horizontal range
            x.rangeRoundBands([0, width], .1, .5);

            // Horizontal axis
            svg.selectAll('.d3-axis-horizontal').call(xAxis);


            // Chart elements
            // -------------------------

            // Bars
            svg.selectAll('.d3-bar').attr("x", function(d) { return x(d.letter); }).attr("width", x.rangeBand());
        }
    }
});