Demos
Grid(Angular)
Paging / Scrolling
Fast Scroller

Fast Scroller (iOS-style) (Angular)

The iPad contact list uses a fast scroller to make it easier to look up people by clicking their initials. This sample implements something similar with FlexGrid by adding a vertical list of initials near the right edge of a grid. When users click or type an initial, the grid scrolls to show the first contact that matches the request.

Learn about FlexGrid | FlexGrid API Reference

This example uses Angular.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; // import '@angular/compiler'; import { Component, enableProdMode, NgModule, ViewChild } from '@angular/core'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { BrowserModule } from '@angular/platform-browser'; import * as wjcCore from '@mescius/wijmo'; import * as wjcGrid from '@mescius/wijmo.grid'; import { WjGridModule } from '@mescius/wijmo.angular2.grid'; // @Component({ selector: 'app-component', templateUrl: 'src/app.component.html' }) export class AppComponent { data: wjcCore.CollectionView; constructor() { this.data = this._getData(); } @ViewChild('flex', { static: true }) flex: wjcGrid.FlexGrid; ngOnInit() { // create the fast scroller element let theScroller = document.createElement('div'); theScroller.classList.add('fast-scroller'); for (let i = 65; i <= 90; i++) { let initial = wjcCore.createElement('<div>' + String.fromCharCode(i) + '</div>'); theScroller.appendChild(initial); } this.flex.hostElement.firstElementChild.appendChild(theScroller); theScroller.addEventListener('mousedown', (e) => { // get initial we're looking for let initial = (<HTMLDivElement>e.target).textContent; this._scrollTo(initial); e.preventDefault(); }); // // allow scrolling by typing the initial as well this.flex.hostElement.addEventListener('keypress', (e) => { this._scrollTo(String.fromCharCode(e.keyCode)); }); } initializeGrid(flex: wjcGrid.FlexGrid) { flex.formatItem.addHandler((s: wjcGrid.FlexGrid, e: wjcGrid.FormatItemEventArgs) => { if (e.panel == s.cells && s.columns[e.col].binding == 'last') { let row = s.rows[e.row]; let item = s.rows[e.row].dataItem; e.cell.innerHTML = row instanceof wjcGrid.GroupRow ? wjcCore.format('&nbsp;&nbsp;<b>{name}</b>', item) : wjcCore.format('{first} <b>{last}</b>', item); } }); } // scroll the grid to show a given initial private _scrollTo(initial: string) { if (initial.length == 1) { initial = initial.toUpperCase(); for (let i = 0; i < this.flex.rows.length; i++) { let row = this.flex.rows[i]; if (row instanceof wjcGrid.GroupRow && row.dataItem.name == initial) { let rc = this.flex.cells.getCellBoundingRect(i, 0, true); let pt = this.flex.scrollPosition; wjcCore.animate((pct: number) => { let y = (pt.y * (1 - pct)) + (-rc.top * pct); this.flex.scrollPosition = new wjcCore.Point(pt.x, y); }, 300); break; } } } } private _getData() { let data = []; let first = 'Adeline,Alexander,Alice,Amelia,Andrew,Arabella,Aria,Aryan,Asher,Astrid,Audrey,Aurelia,Aurora,Austin,Ava,Axel,Benjamin,Bodhi,Caleb,Callum,Caroline,Charlotte,Chloe,Claire,Cora,Daniel,Declan,Eleanor,Eli,Elijah,Elise,Elizabeth,Ella,Eloise,Emily,Emma,Esme,Ethan,Evangeline,Ezra,Felix,Finn,Genevieve,Grace,Hazel,Henry,Imogen,Isaac,Isabella,Isla,Ivy,Jack,Jacob,James,Jane,Jasper,John,Julian,Khaleesi,Leo,Levi,Liam,Lucas,Lucy,Luke,Luna,Lydia,Maeve,Matthew,Maxwell,Maya,Mia,Mila,Miles,Milo,Nathaniel,Nora,Oliver,Olivia,Ophelia,Oscar,Penelope,Roman,Rose,Sadie,Samuel,Scarlett,Sebastian,Silas,Soren,Stella,Thea,Theodore,Thomas,Violet,William,Wyatt,Xavier,Zachary'.split(','); let last = 'Adams,Alexander,Allen,Anderson,Bailey,Baker,Barnes,Bell,Bennett,Black,Boyd,Brooks,Brown,Bryant,Burns,Butler,Campbell,Carter,Clark,Cole,Coleman,Collins,Cook,Cooper,Cox,Crawford,Cruz,Daniels,Davis,Diaz,Dixon,Edwards,Ellis,Evans,Fisher,Flores,Ford,Foster,Freeman,Garcia,Gibson,Gomez,Gonzales,Gonzalez,Gordon,Graham,Gray,Green,Griffin,Hall,Hamilton,Harris,Harrison,Hayes,Henderson,Henry,Hernandez,Hicks,Hill,Holmes,Howard,Hughes,Hunt,Hunter,Iachetta,Jackson,James,Jenkins,Johnson,Jones,Jordan,Kelly,Kennedy,King,Lee,Lewis,Long,Lopez,Marshall,Martin,Martinez,Mason,Mcdonald,Miller,Mitchell,Moore,Morales,Morgan,Morris,Murphy,Murray,Myers,Nelson,Ortiz,Owens,Parker,Patterson,Perez,Perry,Peterson,Phillips,Porter,Powell,Price,Quaid,Ramirez,Ramos,Reed,Reyes,Reynolds,Rice,Richardson,Rivera,Roberts,Robertson,Robinson,Rodriguez,Rogers,Ross,Russell,Sanchez,Sanders,Scott,Shaw,Simmons,Simpson,Smith,Stevens,Stewart,Sullivan,Taylor,Thomas,Thompson,Torres,Tucker,Turner,Udell,Valentine,Vaughan,Vickers,Walker,Wallace,Ward,Warren,Washington,Watson,Webb,Wells,West,White,Williams,Wilson,Wood,Woods,Wright,Xanders,Xavier,Young,Zabinski,Zacharias'.split(','); for (let i = 0; i < 1000; i++) { data.push({ first: first[Math.floor(Math.random() * first.length)], last: last[Math.floor(Math.random() * last.length)], }); } // group and sort it with a CollectionView let view = new wjcCore.CollectionView(data, { sortDescriptions: ['last', 'first'], groupDescriptions: [ // group by last name's initial new wjcCore.PropertyGroupDescription('last', (item: any, propName: string) => { return item[propName][0]; }) ] }); return view; } } // @NgModule({ imports: [WjGridModule, BrowserModule], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } // enableProdMode(); // Bootstrap application with hash style navigation and global services. platformBrowserDynamic().bootstrapModule(AppModule);
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo FlexGrid Fast Scroller</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- Polyfills --> <script src="node_modules/core-js/client/shim.min.js"></script> <script src="node_modules/zone.js/fesm2015/zone.min.js"></script> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.21.5/system.src.js" integrity="sha512-skZbMyvYdNoZfLmiGn5ii6KmklM82rYX2uWctBhzaXPxJgiv4XBwJnFGr5k8s+6tE1pcR1nuTKghozJHyzMcoA==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> // workaround to load 'rxjs/operators' from the rxjs bundle System.import('rxjs').then(function (m) { System.set(SystemJS.resolveSync('rxjs/operators'), System.newModule(m.operators)); System.import('./src/app.component'); }); </script> </head> <body> <app-component></app-component> </body> </html>
<div class="container-fluid"> <wj-flex-grid #flex [headersVisibility]="'None'" [alternatingRowStep]="0" [isReadOnly]="true" (initialized)="initializeGrid(flex)" [(itemsSource)]="data"> <wj-flex-grid-column [binding]="'last'" [width]="'*'"></wj-flex-grid-column> </wj-flex-grid> </div>
.wj-flexgrid { font-size: 120%; height: 80vh; } .wj-flexgrid .wj-cell { padding: 6px; border: none; } .wj-flexgrid .wj-group:not(.wj-state-selected):not(.wj-state-multi-selected) { background-color: #f0f0f0; } .fast-scroller { display: flex; flex-flow: column wrap; height: 100%; padding: 2em 0; justify-content: center; align-items: center; position: absolute; top: 0; right: 2.5em; cursor: pointer; font-size: 80%; font-weight: 800; color: navy; opacity: .5; } .fast-scroller div { text-align: center; padding: 0 3px; } body { margin-bottom: 20px; }
(function (global) { SystemJS.config({ transpiler: './plugin-typescript.js', typescriptOptions: { "target": "ES2022", "module": "system", "emitDecoratorMetadata": true, "experimentalDecorators": true, }, baseURL: 'node_modules/', meta: { 'typescript': { "exports": "ts" }, '*.css': { loader: 'systemjs-plugin-css' } }, paths: { // paths serve as alias 'npm:': '' }, packageConfigPaths: [ '/node_modules/*/package.json', "/node_modules/@angular/*/package.json", "/node_modules/@mescius/*/package.json" ], map: { 'core-js': 'https://cdn.jsdelivr.net/npm/core-js@2.6.12/client/shim.min.js', 'typescript': 'https://cdnjs.cloudflare.com/ajax/libs/typescript/5.2.2/typescript.min.js', "rxjs": "https://cdnjs.cloudflare.com/ajax/libs/rxjs/7.8.1/rxjs.umd.min.js", 'systemjs-plugin-css': 'https://cdn.jsdelivr.net/npm/systemjs-plugin-css@0.1.37/css.js', '@mescius/wijmo': 'npm:@mescius/wijmo/index.js', '@mescius/wijmo.input': 'npm:@mescius/wijmo.input/index.js', '@mescius/wijmo.styles': 'npm:@mescius/wijmo.styles', '@mescius/wijmo.cultures': 'npm:@mescius/wijmo.cultures', '@mescius/wijmo.chart': 'npm:@mescius/wijmo.chart/index.js', '@mescius/wijmo.chart.analytics': 'npm:@mescius/wijmo.chart.analytics/index.js', '@mescius/wijmo.chart.animation': 'npm:@mescius/wijmo.chart.animation/index.js', '@mescius/wijmo.chart.annotation': 'npm:@mescius/wijmo.chart.annotation/index.js', '@mescius/wijmo.chart.finance': 'npm:@mescius/wijmo.chart.finance/index.js', '@mescius/wijmo.chart.finance.analytics': 'npm:@mescius/wijmo.chart.finance.analytics/index.js', '@mescius/wijmo.chart.hierarchical': 'npm:@mescius/wijmo.chart.hierarchical/index.js', '@mescius/wijmo.chart.interaction': 'npm:@mescius/wijmo.chart.interaction/index.js', '@mescius/wijmo.chart.radar': 'npm:@mescius/wijmo.chart.radar/index.js', '@mescius/wijmo.chart.render': 'npm:@mescius/wijmo.chart.render/index.js', '@mescius/wijmo.chart.webgl': 'npm:@mescius/wijmo.chart.webgl/index.js', '@mescius/wijmo.chart.map': 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'https://cdnjs.cloudflare.com/ajax/libs/jszip/3.10.1/jszip.min.js', "@angular/common/http": "https://cdn.jsdelivr.net/npm/@angular/common@16.2.6/fesm2022/http.mjs", "@angular/core": "https://cdn.jsdelivr.net/npm/@angular/core@16.2.6/fesm2022/core.mjs", "@angular/platform-browser": "https://cdn.jsdelivr.net/npm/@angular/platform-browser@16.2.6/fesm2022/platform-browser.mjs", "@angular/common": "https://cdn.jsdelivr.net/npm/@angular/common@16.2.6/fesm2022/common.mjs", "@angular/compiler": "https://cdn.jsdelivr.net/npm/@angular/compiler@16.2.6/fesm2022/compiler.mjs", "@angular/forms": "https://cdn.jsdelivr.net/npm/@angular/forms@16.2.6/fesm2022/forms.mjs", "@angular/localize": "https://cdn.jsdelivr.net/npm/@angular/localize@16.2.6/fesm2022/localize.mjs", "@angular/platform-browser-dynamic": "https://cdn.jsdelivr.net/npm/@angular/platform-browser-dynamic@16.2.6/fesm2022/platform-browser-dynamic.mjs", }, // packages tells the System loader how to load when no filename and/or no extension packages: { "./src": { defaultExtension: 'ts' }, "node_modules": { defaultExtension: 'js' }, wijmo: { defaultExtension: 'js', } } }); })(this);