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Documentation

The ScrollView is a widget that enables a user to scroll its content. This demo shows how to display the scrollbar within a container and how to update the ScrollView content.

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<div id="scrollview-demo"> <dx-scroll-view #scrollView id="scrollview" [scrollByContent]="scrollByContent" [scrollByThumb]="scrollByThumb" [showScrollbar]="scrollbarMode" [bounceEnabled]="pullDown" reachBottomText="Updating..." (onPullDown)="updateTopContent($event)" (onReachBottom)="updateBottomContent($event)"> <div [innerHTML]="content"></div> </dx-scroll-view> <div class="options"> <div class="caption">Options</div> <div class="option"> <span>Show scrollbar:</span> <dx-select-box id="show-scrollbar-mode" [items]="showScrollbarModes" valueExpr="value" displayExpr="text" [(value)]="scrollbarMode"> </dx-select-box> </div> <div class="option"> <dx-check-box text="Update content on the ReachBottom event" (onValueChanged)="valueChanged($event)" [value]="true"> </dx-check-box> </div> <div class="option"> <dx-check-box text="Update content on the PullDown event" [(value)]="pullDown"> </dx-check-box> </div> <div class="option"> <dx-check-box text="Scroll by content" [(value)]="scrollByContent"> </dx-check-box> </div> <div class="option"> <dx-check-box text="Scroll by thumb" [(value)]="scrollByThumb"> </dx-check-box> </div> </div> </div>
import { NgModule, Component, ViewChild, AfterViewInit, enableProdMode } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { Service } from './app.service'; import { DxScrollViewModule, DxScrollViewComponent , DxCheckBoxModule, DxSelectBoxModule } from 'devextreme-angular'; if(!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'], providers: [Service] }) export class AppComponent implements AfterViewInit { @ViewChild(DxScrollViewComponent) scrollView: DxScrollViewComponent; showScrollbarModes: any[]; content: string; updateContentTimer: number; scrollByContent = true; scrollByThumb = true; scrollbarMode: string; pullDown = false; constructor (service: Service) { this.content = service.getContent(); this.showScrollbarModes = [{ text: "On Scroll", value: "onScroll" }, { text: "On Hover", value: "onHover" }, { text: "Always", value: "always" }, { text: "Never", value: "never" }]; this.scrollbarMode = this.showScrollbarModes[0].value; } ngAfterViewInit() { this.scrollView.instance.option("onReachBottom", this.updateBottomContent); } valueChanged = (data) => { this.scrollView.instance.option("onReachBottom", data.value ? this.updateBottomContent : null); } updateContent = (args, eventName) => { var updateContentText = "<br /><div>Content has been updated on the " + eventName + " event.</div><br />"; if(this.updateContentTimer) clearTimeout(this.updateContentTimer); this.updateContentTimer = setTimeout(() => { this.content = (eventName == "PullDown" ? updateContentText + this.content : this.content + updateContentText); args.component.release(); }, 500); }; updateTopContent = (e) => { this.updateContent(e, "PullDown"); } updateBottomContent = (e) => { this.updateContent(e, "ReachBottom"); } } @NgModule({ imports: [ BrowserModule, DxScrollViewModule, DxCheckBoxModule, DxSelectBoxModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule {} platformBrowserDynamic().bootstrapModule(AppModule)
/deep/ #scrollview-demo { min-height: 550px; } /deep/ #scrollview { height: auto; position: absolute; top: 0; bottom: 300px; padding: 20px; } /deep/ .options { padding: 20px; background-color: rgba(191, 191, 191, 0.15); position: absolute; bottom: 0; left: 0; right: 0; } /deep/ .caption { font-size: 18px; font-weight: 500; } /deep/ .option { margin-top: 10px; } /deep/ .option > span { position: relative; top: 2px; margin-right: 10px; } /deep/ .option > .dx-selectbox { display: inline-block; vertical-align: middle; max-width: 340px; width: 100%; }
import { Injectable } from "@angular/core"; let content = ""; @Injectable() export class Service { getContent(){ for(var i=0; i < 10; i++) { content += "<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>"; } content += "<br />"; return content; } }
// 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@7.0.6/lib/plugin.js', 'typescript': 'npm:typescript@2.2.2/lib/typescript.js', '@angular/core': 'npm:@angular/core@4.1.0/bundles/core.umd.js', '@angular/common': 'npm:@angular/common@4.1.0/bundles/common.umd.js', '@angular/compiler': 'npm:@angular/compiler@4.1.0/bundles/compiler.umd.js', '@angular/platform-browser': 'npm:@angular/platform-browser@4.1.0/bundles/platform-browser.umd.js', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic@4.1.0/bundles/platform-browser-dynamic.umd.js', '@angular/http': 'npm:@angular/http@4.1.0/bundles/http.umd.js', '@angular/router': 'npm:@angular/router@4.1.0/bundles/router.umd.js', '@angular/forms': 'npm:@angular/forms@4.1.0/bundles/forms.umd.js', 'rxjs': 'npm:rxjs@5.3.1', 'devextreme': 'npm:devextreme@17.2', 'jquery': 'npm:jquery@3.1.1/dist/jquery.min.js', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'devextreme-angular': 'npm:devextreme-angular@17.2' }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts' }, 'devextreme': { 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/17.2.3/css/dx.spa.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/17.2.3/css/dx.common.css" /> <link rel="dx-theme" data-theme="generic.light" href="https://cdn3.devexpress.com/jslib/17.2.3/css/dx.light.css" /> <link rel="dx-theme" data-theme="android5.light" href="https://cdn3.devexpress.com/jslib/17.2.3/css/dx.android5.light.css" /> <link rel="dx-theme" data-theme="ios7.default" href="https://cdn3.devexpress.com/jslib/17.2.3/css/dx.ios7.default.css" /> <link rel="dx-theme" data-theme="win10.black" href="https://cdn3.devexpress.com/jslib/17.2.3/css/dx.win10.black.css" /> <link rel="dx-theme" data-theme="win10.white" href="https://cdn3.devexpress.com/jslib/17.2.3/css/dx.win10.white.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@0.19.31/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>