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.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
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' } };
} 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(e: any) {
return `${e.valueText}°F`;
},
};
}
};
customizeText = (arg: any) => `${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;
}
const 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/
window.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/core': 'npm:@angular/core@12.2.15',
'@angular/platform-browser': 'npm:@angular/platform-browser@12.2.15',
'@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@12.2.15',
'@angular/forms': 'npm:@angular/forms@12.2.15',
'@angular/common': 'npm:@angular/common@12.2.15',
'@angular/compiler': 'npm:@angular/compiler@12.2.15',
'tslib': 'npm:tslib@2.3.1/tslib.js',
'rxjs': 'npm:rxjs@6.4.0',
'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.28.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@21.2.5/cjs',
'devextreme/bundles/dx.all': 'npm:devextreme@21.2.5/bundles/dx.all.js',
'jszip': 'npm:jszip@3.7.1/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@1.5.11/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.1.45',
'devexpress-gantt': 'npm:devexpress-gantt@4.0.3',
'devextreme-angular': 'npm:devextreme-angular@21.2.5',
'@devextreme/runtime': 'npm:@devextreme/runtime@2.3.14',
'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js',
'inferno-compat': 'npm:inferno-compat@7.4.11/dist/inferno-compat.min.js',
'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js',
'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js',
'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/dist/inferno-hydrate.min.js',
'inferno-clone-vnode': 'npm:inferno-clone-vnode@7.4.11/dist/inferno-clone-vnode.min.js',
'inferno-create-class': 'npm:inferno-create-class@7.4.11/dist/inferno-create-class.min.js',
'inferno-extras': 'npm:inferno-extras@7.4.11/dist/inferno-extras.min.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:@devextreme/*/package.json',
'npm:@devextreme/runtime@2.3.14/inferno/package.json',
'npm:@angular/*/package.json',
'npm:@angular/common@12.2.15/*/package.json',
'npm:rxjs@6.4.0/package.json',
'npm:rxjs@6.4.0/operators/package.json',
'npm:devextreme-angular@21.2.5/*/package.json',
'npm:devextreme-angular@21.2.5/ui/*/package.json',
'npm:devextreme-angular@21.2.5/package.json',
'npm:devexpress-diagram@2.1.45/package.json',
'npm:devexpress-gantt@4.0.3/package.json',
],
};
System.config(window.config);
<!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/21.2.5/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/21.2.5/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@0.11.4/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>