您可以根据屏幕宽度修剪标签,如下所示
Chart.types.Bar.extend({
name: "BarAlt",
initialize: function (data) {
var originalLabels;
// figure out the best label length for the current window size
if (this.options.responsiveLabelLengths !== undefined) {
var maxLabelLength;
this.options.responsiveLabelLengths
.sort(function (a, b) {
return b.uptoWidth - a.uptoWidth;
})
.forEach(function (spec) {
if (screen.width < spec.uptoWidth)
maxLabelLength = spec.maxLabelLength;
})
// update the labels if required
if (maxLabelLength !== undefined) {
originalLabels = Chart.helpers.clone(data.labels);
data.labels.forEach(function (label, i) {
if (data.labels[i].length > maxLabelLength)
data.labels[i] = data.labels[i].substring(0, maxLabelLength) + '...';
})
}
}
Chart.types.Bar.prototype.initialize.apply(this, arguments);
// optional - now restore the original labels for the tooltips
if (originalLabels !== undefined) {
this.datasets.forEach(function (dataset) {
dataset.bars.forEach(function (bar, i) {
bar.label = originalLabels[i];
})
})
}
}
});
var data = {
labels: ["Really Really Really Really Really Long Text", "February", "March", "April", "May", "June", "July"],
datasets: [
{
label: "My First dataset",
fillColor: "rgba(220,220,220,0.5)",
strokeColor: "rgba(220,220,220,0.8)",
highlightFill: "rgba(220,220,220,0.75)",
highlightStroke: "rgba(220,220,220,1)",
data: [65, 59, 80, 81, 56, 55, 40]
},
{
label: "My Second dataset",
fillColor: "rgba(151,187,205,0.5)",
strokeColor: "rgba(151,187,205,0.8)",
highlightFill: "rgba(151,187,205,0.75)",
highlightStroke: "rgba(151,187,205,1)",
data: [28, 48, 40, 19, 86, 27, 90]
}
]
};
var ctx = document.getElementById("myChart").getContext("2d");
var myLineChart = new Chart(ctx).BarAlt(data, {
responsiveLabelLengths: [
{
uptoWidth: 480,
maxLabelLength: 5
},
{
uptoWidth: 768,
maxLabelLength: 10
},
{
uptoWidth: 992,
maxLabelLength: 20
},
{
uptoWidth: 1200,
maxLabelLength: undefined
},
]
});
由于我们使用的是屏幕宽度,您需要使用 Chrome 开发者工具并选择合适的视口大小来查看效果。出于同样的原因,如果您正在调整窗口大小,这不会有任何影响 - 如果您需要,只需将 screen.width 替换为 window.innerWidth。
将此作为新指令添加到 angular-chart 非常简单。在上述代码块之后(以及 angular-chart.js 的脚本包含之后)为 BarAlt 添加一个新指令,如下所示
angular.module('chart.js')
.directive('chartBarAlt', ['ChartJsFactory', function (ChartJsFactory) { return new ChartJsFactory('BarAlt'); }]);
然后像这样使用指令
<canvas id="line" class="chart chart-bar-alt" data="data" options="options"
labels="labels"></canvas>
注意选项?您需要在您的选项中包含 responsiveLabelLengths 才能启动 BarAlt(否则它就像一个普通的条形图)。你这样做(在你的控制器中)
$scope.options = {
responsiveLabelLengths: [
{
uptoWidth: 480,
maxLabelLength: 5
},
{
uptoWidth: 768,
maxLabelLength: 10
},
{
uptoWidth: 992,
maxLabelLength: 20
},
{
uptoWidth: 1200,
maxLabelLength: undefined
},
]
};
请注意,您需要使用 Chrome 开发人员工具并选择适当的视口大小才能看到效果
小提琴 - http://jsfiddle.net/mqo24Lnx/
以下是修剪在不同屏幕尺寸上的工作方式