Custom Annotations
To customize an annotation, declare the SVG markup in the annotation template. Inside the template, you can access the annotation being customized.
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<dx-chart
id="chart"
[dataSource]="populationData"
>
<dxo-title
text="Top 5 Most Populated States in US">
</dxo-title>
<dxi-series
type="bar"
name="Population"
argumentField="name"
valueField="population">
</dxi-series>
<dxo-common-annotation-settings
type="custom"
series="Population"
template="template"
[allowDragging]="true">
</dxo-common-annotation-settings>
<dxi-annotation *ngFor="let data of populationData"
[data]="data"
[argument]="data.name">
</dxi-annotation>
<dxo-legend [visible]="false"></dxo-legend>
<svg *dxTemplate="let annotation of 'template'" class="annotation">
<image attr.href="{{getImagePath(annotation)}}" width="60" height="40" />
<text x="70" y="25" class="state">{{annotation.argument}}</text>
<text x="0" y="60">
<tspan class="caption">Capital:</tspan>
<tspan dx="5">{{annotation.data.capital}}</tspan>
<tspan dy="14" x="0" class="caption">Population:</tspan>
<tspan dx="5">{{annotation.data.population | number:"3.0-0"}}</tspan>
<tspan dy="14" x="0" class="caption">Area:</tspan>
<tspan dx="5">{{annotation.data.area | number: "3.0-0"}}</tspan>
<tspan dx="5">km</tspan>
<tspan class="sup" dy="-2">2</tspan>
</text>
</svg>
</dx-chart>
import { NgModule, Component, enableProdMode } from '@angular/core';
import { DecimalPipe } from '@angular/common';
import { BrowserModule } from '@angular/platform-browser';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { DxChartModule } from 'devextreme-angular';
import { Service, State } 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 {
populationData: State[];
pipe: any = new DecimalPipe("en-US");
constructor(service: Service) {
this.populationData = service.getPopulationData();
}
getImagePath(annotation) {
const name = annotation.argument.replace(/\s/, "").toLowerCase();
return `../../../../images/flags/${name}.gif`;
}
}
@NgModule({
imports: [
BrowserModule,
DxChartModule
],
declarations: [AppComponent],
bootstrap: [AppComponent]
})
export class AppModule { }
platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep #chart {
height: 440px;
}
::ng-deep .annotation {
font-size: 12px;
}
::ng-deep .state {
font-weight: 500;
font-size: 14px;
}
::ng-deep .caption {
font-weight: 500;
}
::ng-deep .sup {
font-size: 0.8em;
}
import { Injectable } from '@angular/core';
export interface State {
name: string;
population: number;
capital: string;
area: number;
}
const populationData: State[] = [{
name: 'California',
population: 38802500,
capital: 'Sacramento',
area: 423967
}, {
name: 'Texas',
population: 26956958,
capital: 'Austin',
area: 695662
}, {
name: 'Florida',
population: 19893297,
capital: 'Tallahassee',
area: 170312
}, {
name: 'New York',
population: 19746227,
capital: 'Albany',
area: 141297
}, {
name: 'Illinois',
population: 12880580,
capital: 'Springfield',
area: 149995
}];
@Injectable()
export class Service {
getPopulationData(): State[] {
return populationData;
}
}
// 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"
},
},
paths: {
'npm:': 'https://unpkg.com/'
},
map: {
'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js',
'typescript': 'npm:typescript@3.4.5/lib/typescript.js',
'@angular': 'npm:@angular',
'tslib': 'npm:tslib/tslib.js',
'rxjs': 'npm:rxjs',
'devextreme': 'npm:devextreme@20.1',
'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js',
'quill': 'npm:quill@1.3.7/dist/quill.js',
'devexpress-diagram': 'npm:devexpress-diagram@1.0.5',
'devexpress-gantt': 'npm:devexpress-gantt@1.0.3',
'devextreme-angular': 'npm:devextreme-angular@20.1'
},
packages: {
'app': {
main: './app.component.ts',
defaultExtension: 'ts'
},
'devextreme': {
defaultExtension: 'js'
},
'devextreme/events/utils': {
main: 'index'
},
'devextreme/events': {
main: 'index'
},
},
packageConfigPaths: [
"npm:*/package.json",
"npm:@angular/*/package.json",
"npm:@angular/common/*/package.json",
"npm:rxjs/operators/package.json",
"npm:devextreme-angular@20.1/*/package.json",
"npm:devextreme-angular@20.1/ui/*/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/20.1.4/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.1.4/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>