Customize Points and Labels
Documentation
This demo shows how you can customize individual points and labels in the Chart.
Feel free to share demo-related thoughts here.
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If you have technical questions, please create a support ticket in the DevExpress Support Center.
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<dx-chart id="chart" [dataSource]="temperaturesData" title="Daily Temperature in May" [customizePoint]="customizePoint"
[customizeLabel]="customizeLabel">
<dxi-series argumentField="day" valueField="value" type="bar" color="#e7d19a"></dxi-series>
<dxi-value-axis [maxValueMargin]="0.01" [visualRange]="{startValue:40}">
<dxo-label [customizeText]="customizeText"></dxo-label>
<dxi-constant-line [width]="2" [value]="lowAverage" color="#8c8cff" dashStyle="dash">
<dxo-label text="Low Average"></dxo-label>
</dxi-constant-line>
<dxi-constant-line [width]="2" [value]="highAverage" color="#ff7c7c" dashStyle="dash">
<dxo-label text="High Average"></dxo-label>
</dxi-constant-line>
</dxi-value-axis>
<dxo-legend [visible]="false"></dxo-legend>
<dxo-export [enabled]="true"></dxo-export>
</dx-chart>
import { NgModule, Component, enableProdMode } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { DxChartModule } from 'devextreme-angular';
import { Service, Temperature } from './app.service';
if(!/localhost/.test(document.location.host)) {
enableProdMode();
}
@Component({
selector: 'demo-app',
providers: [Service],
templateUrl: 'app/app.component.html',
styleUrls: ['app/app.component.css']
})
export class AppComponent {
highAverage = 77;
lowAverage = 58;
temperaturesData: Temperature[];
constructor(service: Service) {
this.temperaturesData = service.getTemperaturesData();
}
customizePoint = (arg: any) => {
if(arg.value > this.highAverage) {
return { color: "#ff7c7c", hoverStyle: { color: "#ff7c7c" } };
} else if(arg.value < this.lowAverage) {
return { color: "#8c8cff", hoverStyle: { color: "#8c8cff" } };
}
}
customizeLabel = (arg: any) => {
if (arg.value > this.highAverage) {
return {
visible: true,
backgroundColor: "#ff7c7c",
customizeText: function (e: any) {
return e.valueText + "°F";
}
};
}
}
customizeText = (arg: any) => {
return arg.valueText + "°F";
}
}
@NgModule({
imports: [
BrowserModule,
DxChartModule
],
declarations: [AppComponent],
bootstrap: [AppComponent]
})
export class AppModule { }
platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep #chart {
height: 440px;
}
import { Injectable } from '@angular/core';
export class Temperature {
day: string;
value: number;
}
let temperaturesData : Temperature[] = [{
day: '1',
value: 57
}, {
day: '2',
value: 58
}, {
day: '3',
value: 57
}, {
day: '4',
value: 59
}, {
day: '5',
value: 63
}, {
day: '6',
value: 63
}, {
day: '7',
value: 63
}, {
day: '8',
value: 64
}, {
day: '9',
value: 64
}, {
day: '10',
value: 64
}, {
day: '11',
value: 69
}, {
day: '12',
value: 72
}, {
day: '13',
value: 75
}, {
day: '14',
value: 78
}, {
day: '15',
value: 76
}, {
day: '16',
value: 70
}, {
day: '17',
value: 65
}, {
day: '18',
value: 65
}, {
day: '19',
value: 68
}, {
day: '20',
value: 70
}, {
day: '21',
value: 73
}, {
day: '22',
value: 73
}, {
day: '23',
value: 75
}, {
day: '24',
value: 78
}, {
day: '25',
value: 76
}, {
day: '26',
value: 76
}, {
day: '27',
value: 80
}, {
day: '28',
value: 76
}, {
day: '29',
value: 75
}, {
day: '30',
value: 75
}, {
day: '31',
value: 74
}];
@Injectable()
export class Service {
getTemperaturesData(): Temperature[] {
return temperaturesData;
}
}
// In real applications, you should not transpile code in the browser. You can see how to create your own application with Angular and DevExtreme here:
// https://js.devexpress.com/Documentation/Guide/Angular_Components/Getting_Started/Create_a_DevExtreme_Application/
System.config({
transpiler: 'ts',
typescriptOptions: {
module: "system",
emitDecoratorMetadata: true,
experimentalDecorators: true
},
meta: {
'typescript': {
"exports": "ts"
},
'devextreme/localization.js': {
"esModule": true
}
},
paths: {
'npm:': 'https://unpkg.com/'
},
map: {
'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js',
'typescript': 'npm:typescript@3.5.3/lib/typescript.js',
'@angular': 'npm:@angular',
'tslib': 'npm:tslib@2.1.0/tslib.js',
'rxjs': 'npm:rxjs@6.4.0',
'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.26.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@20.2.6',
'jszip': 'npm:jszip@3.6.0/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@0.10.3/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.0.18',
'devexpress-gantt': 'npm:devexpress-gantt@2.0.24',
'devextreme-angular': 'npm:devextreme-angular@20.2.6',
'preact': 'npm:preact@10.5.13/dist/preact.js',
'preact/hooks': 'npm:preact@10.5.13/hooks/dist/hooks.js'
},
packages: {
'app': {
main: './app.component.ts',
defaultExtension: 'ts'
},
'devextreme': {
defaultExtension: 'js'
},
'devextreme/events/utils': {
main: 'index'
},
'devextreme/events': {
main: 'index'
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js'
}
},
packageConfigPaths: [
"npm:@angular/*/package.json",
"npm:@angular/common/*/package.json",
"npm:rxjs/package.json",
"npm:rxjs/operators/package.json",
"npm:devextreme-angular/*/package.json",
"npm:devextreme-angular/ui/*/package.json",
"npm:devextreme-angular/package.json",
"npm:devexpress-diagram/package.json",
"npm:devexpress-gantt/package.json",
]
});
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>DevExtreme Demo</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.6/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.6/css/dx.light.css" />
<script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
<script src="https://unpkg.com/zone.js@0.10.2/dist/zone.js"></script>
<script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script>
<script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script>
<script src="config.js"></script>
<script>
System.import('app').catch(console.error.bind(console));
</script>
</head>
<body class="dx-viewport">
<div class="demo-container">
<demo-app>Loading...</demo-app>
</div>
</body>
</html>