有没有办法使用Chart.js库制作堆叠和分组的条形图?
它应该类似于这个 http://www.highcharts.com/demo/column-stacked-and-grouped。
它应该类似于这个 http://www.highcharts.com/demo/column-stacked-and-grouped。
好的,我找到了解决方法。在这个GitHub问题中有描述,解决方案在这个JSFiddle中。
Chart.defaults.groupableBar = Chart.helpers.clone(Chart.defaults.bar);
var helpers = Chart.helpers;
Chart.controllers.groupableBar = Chart.controllers.bar.extend({
calculateBarX: function (index, datasetIndex) {
// position the bars based on the stack index
var stackIndex = this.getMeta().stackIndex;
return Chart.controllers.bar.prototype.calculateBarX.apply(this, [index, stackIndex]);
},
hideOtherStacks: function (datasetIndex) {
var meta = this.getMeta();
var stackIndex = meta.stackIndex;
this.hiddens = [];
for (var i = 0; i < datasetIndex; i++) {
var dsMeta = this.chart.getDatasetMeta(i);
if (dsMeta.stackIndex !== stackIndex) {
this.hiddens.push(dsMeta.hidden);
dsMeta.hidden = true;
}
}
},
unhideOtherStacks: function (datasetIndex) {
var meta = this.getMeta();
var stackIndex = meta.stackIndex;
for (var i = 0; i < datasetIndex; i++) {
var dsMeta = this.chart.getDatasetMeta(i);
if (dsMeta.stackIndex !== stackIndex) {
dsMeta.hidden = this.hiddens.unshift();
}
}
},
calculateBarY: function (index, datasetIndex) {
this.hideOtherStacks(datasetIndex);
var barY = Chart.controllers.bar.prototype.calculateBarY.apply(this, [index, datasetIndex]);
this.unhideOtherStacks(datasetIndex);
return barY;
},
calculateBarBase: function (datasetIndex, index) {
this.hideOtherStacks(datasetIndex);
var barBase = Chart.controllers.bar.prototype.calculateBarBase.apply(this, [datasetIndex, index]);
this.unhideOtherStacks(datasetIndex);
return barBase;
},
getBarCount: function () {
var stacks = [];
// put the stack index in the dataset meta
Chart.helpers.each(this.chart.data.datasets, function (dataset, datasetIndex) {
var meta = this.chart.getDatasetMeta(datasetIndex);
if (meta.bar && this.chart.isDatasetVisible(datasetIndex)) {
var stackIndex = stacks.indexOf(dataset.stack);
if (stackIndex === -1) {
stackIndex = stacks.length;
stacks.push(dataset.stack);
}
meta.stackIndex = stackIndex;
}
}, this);
this.getMeta().stacks = stacks;
return stacks.length;
},
});
var data = {
labels: ["January", "February", "March"],
datasets: [
{
label: "Apples",
backgroundColor: "rgba(99,255,132,0.2)",
data: [20, 10, 30],
stack: 1
},
{
label: "Bananas",
backgroundColor: "rgba(99,132,255,0.2)",
data: [40, 50, 20],
stack: 1
},
{
label: "Cookies",
backgroundColor: "rgba(255,99,132,0.2)",
data: [60, 20, 20],
stack: 1
},
{
label: "Apples",
backgroundColor: "rgba(99,255,132,0.2)",
data: [20, 10, 30],
stack: 2
},
{
label: "Bananas",
backgroundColor: "rgba(99,132,255,0.2)",
data: [40, 50, 20],
stack: 2
},
{
label: "Cookies",
backgroundColor: "rgba(255,99,132,0.2)",
data: [60, 20, 20],
stack: 2
},
{
label: "Apples",
backgroundColor: "rgba(99,255,132,0.2)",
data: [20, 10, 30],
stack: 3
},
{
label: "Bananas",
backgroundColor: "rgba(99,132,255,0.2)",
data: [40, 50, 20],
stack: 3
},
{
label: "Cookies",
backgroundColor: "rgba(255,99,132,0.2)",
data: [60, 20, 20],
stack: 3
},
]
};
var ctx = document.getElementById("myChart").getContext("2d");
new Chart(ctx, {
type: 'groupableBar',
data: data,
options: {
legend: {
labels: {
generateLabels: function(chart) {
return Chart.defaults.global.legend.labels.generateLabels.apply(this, [chart]).filter(function(item, i){
return i <= 2;
});
}
}
},
scales: {
yAxes: [{
ticks: {
max: 160,
},
stacked: true,
}]
}
}
});
您可以使用以下数据实现堆叠条形图
this.dataStackedBarChart = {
type: 'horizontalBar',
labels: this.stackedBarChartLabel,
datasets: [
{
label: 'Success Count',
stack: 'Stack 0',
data: this.successCount,
backgroundColor: 'green'
},
{
label: 'FailureCount',
stack: 'Stack 0',
data: this.failureCount,
backgroundColor: 'red'
},
{
label: 'AvgDuration',
stack: 'Stack 1',
data: this.avgDuration,
backgroundColor: 'black'
},
{
label: 'MaxDuration',
stack: 'Stack 2',
data: this.maxDuration,
backgroundColor: 'orange'
},
{
label: 'MinDuration',
stack: 'Stack 3',
data: this.minDuration,
backgroundColor: 'pink'
}
],
borderWidth: 2
}
this.optionsStackedBarChart = {
tooltips: {
callbacks: {
label: function (tooltipItem, data) {
var label = this.uniqueApiPath[tooltipItem.index];
return label;
}
}
},
scales: {
xAxes: [
{
stacked: true,
display: true,
ticks: {
beginAtZero: true,
min: 0,
suggestedMin: 0
}
}
],
yAxes: [
{
stacked: true,
display: true,
ticks: {
beginAtZero: true,
min: 0,
suggestedMin: 0
}
}
]
}