Skip to content

D
DHAS
Switch branch/tag
Find file
Normal viewHistoryPermalink
line-skip-points.html 5.35 KB
Newer Older
UPGIT7
23d4d558
 
Thitichaipun Wutthisak 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 
<!doctype html>
<html>

<head>
    <title>Line Chart</title>
    <script src="../dist/Chart.bundle.js"></script>
    <script src="http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
    <style>
    canvas {
        -moz-user-select: none;
        -webkit-user-select: none;
        -ms-user-select: none;
    }
    </style>
</head>

<body>
    <div style="width:75%;">
        <canvas id="canvas"></canvas>
    </div>
    <br>
    <br>
    <button id="randomizeData">Randomize Data</button>
    <button id="addDataset">Add Dataset</button>
    <button id="removeDataset">Remove Dataset</button>
    <button id="addData">Add Data</button>
    <button id="removeData">Remove Data</button>
    <script>
        var MONTHS = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];

        var randomScalingFactor = function() {
            return Math.round(Math.random() * 100);
            //return 0;
        };
        var randomColorFactor = function() {
            return Math.round(Math.random() * 255);
        };
        var randomColor = function(opacity) {
            return 'rgba(' + randomColorFactor() + ',' + randomColorFactor() + ',' + randomColorFactor() + ',' + (opacity || '.3') + ')';
        };

        var config = {
            type: 'line',
            data: {
                labels: ["January", "February", "March", "April", "May", "June", "July"],
                datasets: [{
                    label: "My First dataset",

                    // Skip a point in the middle
                    data: [randomScalingFactor(), randomScalingFactor(), NaN, randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()],
                    fill: true,
                    borderDash: [5, 5],
                }, {
                    label: "My Second dataset",

                    // Skip first and last points
                    data: [NaN, randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), NaN],
                }]
            },
            options: {
                responsive: true,
                title:{
                    display:true,
                    text:'Chart.js Line Chart - Skip Points'
                },
                tooltips: {
                    mode: 'label',
                },
                hover: {
                    mode: 'label'
                },
                scales: {
                    xAxes: [{
                        display: true,
                        scaleLabel: {
                            display: true,
                            labelString: 'Month'
                        }
                    }],
                    yAxes: [{
                        display: true,
                        scaleLabel: {
                            display: true,
                            labelString: 'Value'
                        },
                    }]
                }
            }
        };

        $.each(config.data.datasets, function(i, dataset) {
            dataset.borderColor = randomColor(0.4);
            dataset.backgroundColor = randomColor(0.5);
            dataset.pointBorderColor = randomColor(0.7);
            dataset.pointBackgroundColor = randomColor(0.5);
            dataset.pointBorderWidth = 1;
        });

        window.onload = function() {
            var ctx = document.getElementById("canvas").getContext("2d");
            window.myLine = new Chart(ctx, config);
        };

        $('#randomizeData').click(function() {
            $.each(config.data.datasets, function(i, dataset) {
                dataset.data = dataset.data.map(function() {
                    return randomScalingFactor();
                });

            });

            window.myLine.update();
        });

        $('#addDataset').click(function() {
            var newDataset = {
                label: 'Dataset ' + config.data.datasets.length,
                borderColor: randomColor(0.4),
                backgroundColor: randomColor(0.5),
                pointBorderColor: randomColor(0.7),
                pointBackgroundColor: randomColor(0.5),
                pointBorderWidth: 1,
                data: [],
            };

            for (var index = 0; index < config.data.labels.length; ++index) {
                newDataset.data.push(randomScalingFactor());
            }

            config.data.datasets.push(newDataset);
            window.myLine.update();
        });

        $('#addData').click(function() {
            if (config.data.datasets.length > 0) {
                var month = MONTHS[config.data.labels.length % MONTHS.length];
                config.data.labels.push(month);

                $.each(config.data.datasets, function(i, dataset) {
                    dataset.data.push(randomScalingFactor());
                });

                window.myLine.update();
            }
        });

        $('#removeDataset').click(function() {
            config.data.datasets.splice(0, 1);
            window.myLine.update();
        });

        $('#removeData').click(function() {
            config.data.labels.splice(-1, 1); // remove the label first

            config.data.datasets.forEach(function(dataset, datasetIndex) {
                dataset.data.pop();
            });

            window.myLine.update();
        });
    </script>
</body>

</html>