Demos
Grid(React)
Paging / Scrolling
Fast Scroller

Fast Scroller (iOS-style) (React)

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 React.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import ReactDOM from 'react-dom/client'; import React, { useRef } from 'react'; import useEvent from 'react-use-event-hook'; import * as wjcCore from '@mescius/wijmo'; import * as wjcGrid from '@mescius/wijmo.react.grid'; import * as wjGrid from '@mescius/wijmo.grid'; import './app.css'; import { data } from './data'; function App() { const flexRef = useRef(null); const initializeGrid = useEvent((flex) => { flexRef.current = flex; flex.formatItem.addHandler((s, e) => { 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 wjGrid.GroupRow ? wjcCore.format('&nbsp;&nbsp;<b>{name}</b>', item) : wjcCore.format('{first} <b>{last}</b>', item); } }); // 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); } flexRef.current.hostElement.lastElementChild.appendChild(theScroller); theScroller.addEventListener('mousedown', (e) => { // get initial we're looking for let initial = (e.target).textContent; scrollTo(initial); e.preventDefault(); }); // // allow scrolling by typing the initial as well flexRef.current.hostElement.addEventListener('keypress', (e) => { scrollTo(String.fromCharCode(e.keyCode)); }); }); const scrollTo = (initial) => { if (initial.length == 1) { const flex = flexRef.current; initial = initial.toUpperCase(); for (let i = 0; i < flex.rows.length; i++) { let row = flex.rows[i]; if (row instanceof wjGrid.GroupRow && row.dataItem.name == initial) { let rc = flex.cells.getCellBoundingRect(i, 0, true); let pt = flex.scrollPosition; wjcCore.animate((pct) => { let y = (pt.y * (1 - pct)) + (-rc.top * pct); flex.scrollPosition = new wjcCore.Point(pt.x, y); }, 300); break; } } } }; return (<div className="container-fluid"> <wjcGrid.FlexGrid headersVisibility="None" alternatingRowStep={0} isReadOnly={true} initialized={initializeGrid} itemsSource={data}> <wjcGrid.FlexGridColumn binding="last" width="*"/> </wjcGrid.FlexGrid> </div>); } const container = document.getElementById('app'); if (container) { const root = ReactDOM.createRoot(container); root.render(<App />); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo Wijmo FlexGrid Fast Scroller</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.40/system.src.js" integrity="sha512-G6mEj6h18+m3MvzdviSDfPle/TfH0//cXcB33AKlNR/Rha0yQsKefDZKRTkIZos97HEGq2JMV1RT5ybMoQ3WsQ==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div id="app"></div> </body> </html>
.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; }
import * as wjcCore from '@mescius/wijmo'; function 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: [ new wjcCore.PropertyGroupDescription('last', (item, propName) => { return item[propName][0]; }) ] }); return view; } export const data = getData();
(function (global) { System.config({ transpiler: 'plugin-babel', babelOptions: { es2015: true, react: true }, meta: { '*.css': { loader: 'css' } }, paths: { // paths serve as alias 'npm:': 'node_modules/' }, // map tells the System loader where to look for things map: { 'jszip': 'npm:jszip/dist/jszip.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': 'npm:@mescius/wijmo.chart.map/index.js', '@mescius/wijmo.gauge': 'npm:@mescius/wijmo.gauge/index.js', '@mescius/wijmo.grid': 'npm:@mescius/wijmo.grid/index.js', '@mescius/wijmo.grid.detail': 'npm:@mescius/wijmo.grid.detail/index.js', '@mescius/wijmo.grid.filter': 'npm:@mescius/wijmo.grid.filter/index.js', '@mescius/wijmo.grid.search': 'npm:@mescius/wijmo.grid.search/index.js', '@mescius/wijmo.grid.grouppanel': 'npm:@mescius/wijmo.grid.grouppanel/index.js', '@mescius/wijmo.grid.multirow': 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"@mescius/wijmo.react.grid.grouppanel": "npm:@mescius/wijmo.react.grid.grouppanel/index.js", '@mescius/wijmo.react.grid.search': 'npm:@mescius/wijmo.react.grid.search/index.js', "@mescius/wijmo.react.grid.multirow": "npm:@mescius/wijmo.react.grid.multirow/index.js", "@mescius/wijmo.react.grid.sheet": "npm:@mescius/wijmo.react.grid.sheet/index.js", '@mescius/wijmo.react.grid.transposed': 'npm:@mescius/wijmo.react.grid.transposed/index.js', '@mescius/wijmo.react.grid.transposedmultirow': 'npm:@mescius/wijmo.react.grid.transposedmultirow/index.js', '@mescius/wijmo.react.grid.immutable': 'npm:@mescius/wijmo.react.grid.immutable/index.js', "@mescius/wijmo.react.grid": "npm:@mescius/wijmo.react.grid/index.js", "@mescius/wijmo.react.input": "npm:@mescius/wijmo.react.input/index.js", "@mescius/wijmo.react.olap": "npm:@mescius/wijmo.react.olap/index.js", "@mescius/wijmo.react.viewer": "npm:@mescius/wijmo.react.viewer/index.js", "@mescius/wijmo.react.nav": 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"npm:react-use-event-hook/dist/esm/useEvent.js", }, // packages tells the System loader how to load when no filename and/or no extension packages: { src: { defaultExtension: 'jsx' }, "node_modules": { defaultExtension: 'js' }, } }); })(this);