[英]ng2-charts / chart.js - How to set doughnut/pie chart color on specific labels programatically?
我有一个交易列表,这些交易列表以图表标签的形式返回status
,并以图表数据的形式count
。 我的标签通常是['cancelled', 'completed', 'rejected']
,但有时数据返回['cancelled', 'completed', 'error', 'pending', 'rejected]
。 如何为每个标签设置不同的颜色?
到目前为止,我的代码:
statusCount: StatusCount[] = [];
loaded = false;
// Doughnut
public chartData = [];
public chartLabels = [];
public chartType = 'doughnut';
public chartOptions = {
responsive: true,
maintainAspectRatio: false,
legend: {
position: 'right'
}
};
private chartColors: any[] = [{ backgroundColor: ['#E91E63', '#00BFA5', '#ff1744'] }];
constructor(
private apiService: ApiService
) {
}
ngOnInit() {
this.getTransactionStatus();
}
getTransactionStatus() {
this.apiService.getTransactionStatus().subscribe((res: any) => {
this.statusCount = res;
for (const i of this.statusCount) {
this.chartData.push(i.count);
this.chartLabels.push(i.status);
}
this.loaded = true;
}, error => {
console.log(error);
});
}
您也可以在getTransactionStatus
方法中设置chartColors
。
它看起来像这样(假设您的statusCount
对象具有color属性:
public chartColors: any[] = [{ backgroundColor: [] }];
constructor(
private apiService: ApiService
) {
}
ngOnInit() {
this.getTransactionStatus();
}
getTransactionStatus() {
this.apiService.getTransactionStatus().subscribe((res: any) => {
this.statusCount = res;
for (const i of this.statusCount) {
this.chartData.push(i.count);
this.chartLabels.push(i.status);
this.chartColors[0].backgroundColor.push(i.color);
}
this.loaded = true;
}, error => {
console.log(error);
});
}
请注意,您的chartColors
对象应该是公共的(例如chartData
, chartLabelse
等),以便HTML可见(它可以在开发模式下工作,但除非是公共的,否则它不会生成。
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