Add legend in table with x axis label in Chart
This article explains how to add a legend in a table with x-axis labels in the Chart component. The <e-annotation> tag is used to add a legend to the table, and the multiLevelLabels property is used to customize the axis label in table format.
To add a legend in a table with x-axis labels, follow the given steps:
- Initialize the custom elements using the <e-annotation> tag.
- Create table and rectangle shapes in the HTML page and set them as the content of the <e-annotation> tag.
- By setting the coordinateUnit value to 'pixel' in the annotation object, you can place the legend in the chart based on pixel values.
[app.component.ts]
import { Component, ViewEncapsulation, ViewChild } from '@angular/core';
import { ChartComponent, IAxisLabelRenderEventArgs, IMouseEventArgs } from '@syncfusion/ej2-angular-charts';
@Component({
selector: 'my-app',
template:
`<ejs-chart id="chart-container2" #chart [margin]='columnMargin' [chartArea]='columnChart' [primaryXAxis]='columnXAxis'[primaryYAxis]='columnYAxis' [margin]='columnMargin' (axisLabelRender)='axisLabelRender($event)' (chartMouseClick)='chartMouseClick($event)'>
<e-annotations>
<e-annotation x='120' y='328' region='Chart' coordinateUnit = 'pixel'>
<ng-template #content>
<div style='width:80px; padding: 5px;'>
<table style='width: 100%'>
<tr>
<td><div id='first' style='width: 10px; height: 10px; background:skyblue;'></div></td>
<td style='padding-left: 5px;'>Awarded</td>
</tr>
<tr>
<td><div id='second' style='width: 10px; height: 10px; background:#b22222;'></div></td>
<td style='padding-left: 5px;'>Paid</td>
</tr>
</table>
</div>
</ng-template>
</e-annotation>
<e-annotation x='116' y='312' region='Chart' coordinateUnit = 'pixel'>
<ng-template #content>
<div style='width:80px; padding: 5px;'>
<table style='width: 100%'>
<tr>
<td><div style='border-style: solid;border-width: 1px; height:27px;width:85px; border-color: #b5b5b5;'></div></td>
</tr>
</table>
</div>
</ng-template>
</e-annotation>
<e-annotation x='116' y='340' region='Chart' coordinateUnit = 'pixel'>
<ng-template #content>
<div style='width:80px; padding: 5px;'>
<table style='width: 100%'>
<tr>
<td><div style='border-style: solid;border-width: 1px; height:27px;width:85px; border-color: #b5b5b5;'></div></td>
</tr>
</table>
</div>
</ng-template>
</e-annotation>
</e-annotations>
<e-series-collection>
<e-series [dataSource]='columnData' type='Column' xName='x' yName='y' [marker]='columnMarker' fill='skyblue'></e-series>
<e-series [dataSource]='columnData' type='Column' xName='x' yName='y1' [marker]='columnMarker' fill='#b22222'></e-series>
</e-series-collection>
</ejs-chart>`,
encapsulation: ViewEncapsulation.None
})
export class AppComponent {
public columnMargin: Object = {
left: 100, right: 100, bottom: 100
};
@ViewChild('chart')
public chartInstance: ChartComponent;
public firstClick: Boolean = true;
public tooltip: Object = { enable: true};
// intialize primary x-axis
public columnXAxis: Object = {
valueType: 'Category',
border: { width: 1, type: 'Rectangle' },
isIndexed: true,
interval: 1,
majorGridLines: { width: 0},
multiLevelLabels: [
{
border: { type: 'Rectangle' },
textStyle: { fontWeight: 'Bold' },
categories: [
{ start: -0.5, end: 3.5, text: 'Construction', },
{ start: 3.5, end: 7.5, text: 'Professional Services', },
]
},
{
border: { type: 'Rectangle' },
categories: [
{ start: -0.5, end: 0.5, text: '248,952,090' },
{ start: 0.5, end: 1.5, text: '248,952,090' },
{ start: 1.5, end: 2.5, text: '248,952,090' },
{ start: 2.5, end: 3.5, text: '248,952,090' },
{ start: 3.5, end: 4.5, text: '248,952,090' },
{ start: 4.5, end: 5.5, text: '248,952,090' },
{ start: 5.5, end: 6.5, text: '248,952,090' },
{ start: 6.5, end: 7.5, text: '248,952,090' },
]
},
{
border: { type: 'Rectangle' },
categories: [
{ start: -0.5, end: 0.5, text: '248,952,090' },
{ start: 0.5, end: 1.5, text: '248,952,090' },
{ start: 1.5, end: 2.5, text: '248,952,090' },
{ start: 2.5, end: 3.5, text: '248,952,090' },
{ start: 3.5, end: 4.5, text: '248,952,090' },
{ start: 4.5, end: 5.5, text: '248,952,090' },
{ start: 5.5, end: 6.5, text: '248,952,090' },
{ start: 6.5, end: 7.5, text: '248,952,090' },
]
},
]
};
public axisLabelRender(args: IAxisLabelRenderEventArgs): void {
if(args.axis.name === 'primaryXAxis'){
console.log(args);
args.text = args.text.split(',')[0];
}
};
public chartMouseClick(args: IMouseEventArgs): void {
if((args.x >= 83 && args.x <= 155) && (args.y > 312 && args.y < 343)){
this.chartInstance.series[0].dataSource = this.firstClick ? null : this.columnData;
this.chartInstance.refresh();
this.firstClick = !this.firstClick;
}
};
public columnMarker: Object = {
visible: false,
dataLabel : {
visible : true
}
};
public columnYAxis: Object = {
labelFormat:'{value}%',
};
public chartArea: Object = {
border: {width:0}
};
public columnChart: Object = {
border: {width:0}
};
public primaryYAxis: Object = {
majorGridLines: {width: 0},
minimum: 0, maximum: 120,
interval: 20
};
public marker: Object = {
height: 20, width:20
};
public columnData: Object[] = [
{ x: 'MWBE', y: 2800000, y1: 1000000 },
{ x: 'LDB', y: 1000000, y1:1550000 },
{ x: 'VBE', y: 2200000, y1:1200000 },
{ x: 'DBE', y: 3000000,y1: 1000000 },
{ x: 'MWBE', y: 1000000, y1: 800000 },
{ x: 'LDB', y: 500000, y1:400000 },
{ x: 'VBE', y: 2100000, y1:1500000 },
{ x: 'DBE', y: 900000, y1: 0 }
];
};
Screenshot:
Refer to the working sample for additional details and implementation: View Sample in StackBlitz.
Conclusion
We hope you enjoyed learning about how to Add legend in table with x axis label in Chart.
You can refer to our Angular feature tour page to learn about its other groundbreaking feature representations and documentation, and how to quickly get started with configuration specifications. You can also explore our Angular chart example to understand how to create and manipulate data.
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