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bar.html 5.21 KB
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UPGIT7
23d4d558
 
Thitichaipun Wutthisak committed
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<!doctype html>
<html>

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

<body>
    <div id="container" style="width: 75%;">
        <canvas id="canvas"></canvas>
    </div>
    <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.random() > 0.5 ? 1.0 : -1.0) * Math.round(Math.random() * 100);
        };
        var randomColorFactor = function() {
            return Math.round(Math.random() * 255);
        };
        var randomColor = function() {
            return 'rgba(' + randomColorFactor() + ',' + randomColorFactor() + ',' + randomColorFactor() + ',.7)';
        };

        var barChartData = {
            labels: ["January", "February", "March", "April", "May", "June", "July"],
            datasets: [{
                label: 'Dataset 1',
                backgroundColor: "rgba(220,220,220,0.5)",
                data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()]
            }, {
                hidden: true,
                label: 'Dataset 2',
                backgroundColor: "rgba(151,187,205,0.5)",
                data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()]
            }, {
                label: 'Dataset 3',
                backgroundColor: "rgba(151,187,205,0.5)",
                data: [randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor(), randomScalingFactor()]
            }]

        };

        window.onload = function() {
            var ctx = document.getElementById("canvas").getContext("2d");
            window.myBar = new Chart(ctx, {
                type: 'bar',
                data: barChartData,
                options: {
                    // Elements options apply to all of the options unless overridden in a dataset
                    // In this case, we are setting the border of each bar to be 2px wide and green
                    elements: {
                        rectangle: {
                            borderWidth: 2,
                            borderColor: 'rgb(0, 255, 0)',
                            borderSkipped: 'bottom'
                        }
                    },
                    responsive: true,
                    legend: {
                        position: 'top',
                    },
                    title: {
                        display: true,
                        text: 'Chart.js Bar Chart'
                    }
                }
            });

        };

        $('#randomizeData').click(function() {
            var zero = Math.random() < 0.2 ? true : false;
            $.each(barChartData.datasets, function(i, dataset) {
                dataset.backgroundColor = randomColor();
                dataset.data = dataset.data.map(function() {
                    return zero ? 0.0 : randomScalingFactor();
                });

            });
            window.myBar.update();
        });

        $('#addDataset').click(function() {
            var newDataset = {
                label: 'Dataset ' + barChartData.datasets.length,
                backgroundColor: randomColor(),
                data: []
            };

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

            barChartData.datasets.push(newDataset);
            window.myBar.update();
        });

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

                for (var index = 0; index < barChartData.datasets.length; ++index) {
                    //window.myBar.addData(randomScalingFactor(), index);
                    barChartData.datasets[index].data.push(randomScalingFactor());
                }

                window.myBar.update();
            }
        });

        $('#removeDataset').click(function() {
            barChartData.datasets.splice(0, 1);
            window.myBar.update();
        });

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

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

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

</html>