Use Range Selection for Filtering
Documentation
The RangeSelector widget allows you to handle changes of the currently selected range. For this purpose, the callback function is specified in the onValueChanged option. This demo illustrates how to use the newly selected range for filtering data.
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<div id="range-selector-demo">
<dx-range-selector
id="range-selector"
title="Filter Employee List by Birth Year"
[dataSource]="employees"
dataSourceField="BirthYear"
(onValueChanged)="onValueChanged($event)">
<dxo-margin [top]="20"></dxo-margin>
<dxo-size [height]="140"></dxo-size>
<dxo-scale
[tickInterval]="1"
[minorTickInterval]="1">
<dxo-label format="decimal"></dxo-label>
</dxo-scale>
<dxo-behavior callValueChanged="onMoving"></dxo-behavior>
</dx-range-selector>
<h2>Selected Employees</h2>
<table>
<tr>
<td *ngFor="let data of tableTitles">
<b>{{data}}</b>
</td>
</tr>
<tr *ngFor="let data of selectedEmployees">
<td>{{data.FirstName}}</td>
<td>{{data.LastName}}</td>
<td>{{data.BirthYear}}</td>
<td>{{data.City}}</td>
<td>{{data.Title}}</td>
</tr>
</table>
</div>
import { NgModule, Component, enableProdMode } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { DxRangeSelectorModule } from 'devextreme-angular';
import { Service, Employee } 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 {
employees: Employee[];
selectedEmployees: Employee[];
tableTitles: string[] = ['First Name', 'Last Name', 'Birth Year', 'City', 'Title'];
constructor(service: Service) {
this.employees = service.getEmployees();
this.selectedEmployees = this.employees;
}
onValueChanged(e) {
let selectedEmployees: any[] = [];
this.employees.forEach((item, index) => {
if (item.BirthYear >= e.value[0] && item.BirthYear <= e.value[1]) {
selectedEmployees.push(item);
}
});
this.selectedEmployees = selectedEmployees;
}
}
@NgModule({
imports: [
BrowserModule,
DxRangeSelectorModule
],
declarations: [AppComponent],
bootstrap: [AppComponent]
})
export class AppModule { }
platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep #range-selector-demo {
height: 540px;
width: 100%;
}
::ng-deep #range-selector-demo h2 {
font-size: 20px;
margin: 38px 0 10px;
text-align: center;
}
::ng-deep #range-selector-demo table {
width: 100%;
border: 1px solid #c2c2c2;
border-collapse: collapse;
border-spacing: 0;
}
::ng-deep #range-selector-demo td {
width: 20%;
padding: 4px;
border-top: 1px solid #c2c2c2;
border-bottom: 1px solid #c2c2c2;
}
::ng-deep #range-selector-demo td > b {
font-weight: 500;
}
import { Injectable } from '@angular/core';
export class Employee {
LastName: string;
FirstName: string;
BirthYear: number;
City: string;
Title: string;
}
let employees: Employee[] = [
{ LastName: "Davolio", FirstName: "Nancy", BirthYear: 1948, City: "Seattle", Title: "Sales Representative" },
{ LastName: "Fuller", FirstName: "Andrew", BirthYear: 1952, City: "Tacoma", Title: "Vice President, Sales" },
{ LastName: "Leverling", FirstName: "Janet", BirthYear: 1963, City: "Kirkland", Title: "Sales Representative" },
{ LastName: "Peacock", FirstName: "Margaret", BirthYear: 1937, City: "Redmond", Title: "Sales Representative" },
{ LastName: "Buchanan", FirstName: "Steven", BirthYear: 1955, City: "London", Title: "Sales Manager" },
{ LastName: "Suyama", FirstName: "Michael", BirthYear: 1963, City: "London", Title: "Sales Representative" },
{ LastName: "King", FirstName: "Robert", BirthYear: 1960, City: "London", Title: "Sales Representative" },
{ LastName: "Callahan", FirstName: "Laura", BirthYear: 1958, City: "Seattle", Title: "Inside Sales Coordinator" },
{ LastName: "Dodsworth", FirstName: "Anne", BirthYear: 1966, City: "London", Title: "Sales Representative" }
];
@Injectable()
export class Service {
getEmployees(): Employee[] {
return employees;
}
}
// 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://github.com/DevExpress/devextreme-angular/blob/master/README.md
System.config({
transpiler: 'ts',
typescriptOptions: {
module: "commonjs",
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/core': 'npm:@angular/core@8.0.0/bundles/core.umd.js',
'@angular/common': 'npm:@angular/common@8.0.0/bundles/common.umd.js',
'@angular/compiler': 'npm:@angular/compiler@8.0.0/bundles/compiler.umd.js',
'@angular/platform-browser': 'npm:@angular/platform-browser@8.0.0/bundles/platform-browser.umd.js',
'@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@8.0.0/bundles/platform-browser-dynamic.umd.js',
'@angular/router': 'npm:@angular/router@8.0.0/bundles/router.umd.js',
'@angular/forms': 'npm:@angular/forms@8.0.0/bundles/forms.umd.js',
'@angular/common/http': 'npm:@angular/common@8.0.0/bundles/common-http.umd.js',
'tslib': 'npm:tslib/tslib.js',
'rxjs': 'npm:rxjs@6.3.3',
'rxjs/operators': 'npm:rxjs@6.3.3/operators',
'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js',
'quill': 'npm:quill@1.3.6/dist/quill.js',
'devexpress-diagram': 'npm:devexpress-diagram',
'devextreme': 'npm:devextreme@19.1',
'devextreme-angular': 'npm:devextreme-angular@19.1'
},
packages: {
'app': {
main: './app.component.ts',
defaultExtension: 'ts'
},
'devextreme': {
defaultExtension: 'js'
},
'rxjs': { main: 'index.js', defaultExtension: 'js' },
'rxjs/operators': { main: 'index.js', defaultExtension: 'js' },
'devextreme-angular': {
main: 'index.js',
defaultExtension: 'js'
}
}
});
<!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/19.1.5/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.1.5/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@0.6.25/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>