在 GWT 应用程序中集成 JS 库

Question

我开发了一个 GWT 2.8.1 应用程序。现在我正在尝试使用第三方库 (ChartJs)。我想将此 js 代码集成到我的 GWT 示例应用程序中：

<script>
    var MONTHS = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
    var config = {
        type: 'line',
        data: {
            labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
            datasets: [{
                label: 'My First dataset',
                backgroundColor: window.chartColors.red,
                borderColor: window.chartColors.red,
                data: [
                    randomScalingFactor(),
                    randomScalingFactor(),
                    randomScalingFactor(),
                    randomScalingFactor(),
                    randomScalingFactor(),
                    randomScalingFactor(),
                    randomScalingFactor()
                ],
                fill: false,
            }, {
                label: 'My Second dataset',
                fill: false,
                backgroundColor: window.chartColors.blue,
                borderColor: window.chartColors.blue,
                data: [
                    randomScalingFactor(),
                    randomScalingFactor(),
                    randomScalingFactor(),
                    randomScalingFactor(),
                    randomScalingFactor(),
                    randomScalingFactor(),
                    randomScalingFactor()
                ],
            }]
        },
        options: {
            responsive: true,
            title: {
                display: true,
                text: 'Chart.js Line Chart'
            },
            tooltips: {
                mode: 'index',
                intersect: false,
            },
            hover: {
                mode: 'nearest',
                intersect: true
            },
            scales: {
                xAxes: [{
                    display: true,
                    scaleLabel: {
                        display: true,
                        labelString: 'Month'
                    }
                }],
                yAxes: [{
                    display: true,
                    scaleLabel: {
                        display: true,
                        labelString: 'Value'
                    }
                }]
            }
        }
    };

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

    document.getElementById('randomizeData').addEventListener('click', function() {
        config.data.datasets.forEach(function(dataset) {
            dataset.data = dataset.data.map(function() {
                return randomScalingFactor();
            });

        });

        window.myLine.update();
    });

    var colorNames = Object.keys(window.chartColors);
    document.getElementById('addDataset').addEventListener('click', function() {
        var colorName = colorNames[config.data.datasets.length % colorNames.length];
        var newColor = window.chartColors[colorName];
        var newDataset = {
            label: 'Dataset ' + config.data.datasets.length,
            backgroundColor: newColor,
            borderColor: newColor,
            data: [],
            fill: false
        };

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

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

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

            config.data.datasets.forEach(function(dataset) {
                dataset.data.push(randomScalingFactor());
            });

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

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

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

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

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

现在我正在尝试（例如）生成图表并将其插入 VerticalPanel。我该怎么做？

注意：我已经在我的项目中复制了我的 Chart.js 库（与 project.gwt.xml 文件处于同一级别）

Answer 1

GWT 没有开箱即用的图表库。

所以我建议您查看 Charba（Chart.js 的 GWT 包装器）

请检查 link carba

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