Fast Scroller (iOS-style) | Grid

import 'bootstrap.css';
import '@mescius/wijmo.styles/wijmo.css';
import './styles.css';
import * as wjCore from '@mescius/wijmo';
import * as wjGrid from '@mescius/wijmo.grid';
//
document.readyState === 'complete' ? init() : window.onload = init;
//
function init() {
//
// create the data
let data = [];
var 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(',');
var 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 (var 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
var view = new wjCore.CollectionView(data, {
sortDescriptions: ['last', 'first'],
groupDescriptions: [
new wjCore.PropertyGroupDescription('last', function (item, propName) {
return item[propName][0];
})
]
});
view.moveCurrentToFirst();
//
// show the data in a FlexGrid
var theGrid = new wjGrid.FlexGrid('#theGrid', {
autoGenerateColumns: false,
columns: [
{ binding: 'last', width: '*' }
],
headersVisibility: 'None',
alternatingRowStep: 0,
isReadOnly: true,
itemsSource: view,
formatItem: function (s, e) {
if (e.panel == s.cells && s.columns[e.col].binding == 'last') {
var row = s.rows[e.row];
var item = s.rows[e.row].dataItem;
e.cell.innerHTML = row instanceof wjGrid.GroupRow
? wjCore.format('&nbsp;&nbsp;<b>{name}</b>', item)
: wjCore.format('{first} <b>{last}</b>', item);
}
}
});
//
// create the fast scroller element
var theScroller = document.createElement('div');
theScroller.classList.add('fast-scroller');
for (var i = 65; i <= 90; i++) {
var initial = wjCore.createElement('<div>' + String.fromCharCode(i) + '</div>');
theScroller.appendChild(initial);
}
theGrid.hostElement.firstElementChild.appendChild(theScroller);
theScroller.addEventListener('mousedown', function (e) {
//
// get initial we're looking for
var initial = e.target.textContent;
scrollTo(initial);
e.preventDefault();
});
//
// allow scrolling by typing the initial as well
theGrid.hostElement.addEventListener('keypress', function (e) {
scrollTo(String.fromCharCode(e.keyCode));
});
//
// scroll the grid to show a given initial
function scrollTo(initial) {
if (initial.length == 1) {
initial = initial.toUpperCase();
for (var i = 0; i < theGrid.rows.length; i++) {
var row = theGrid.rows[i];
if (row instanceof wjGrid.GroupRow && row.dataItem.name == initial) {
var rc = theGrid.cells.getCellBoundingRect(i, 0, true);
var pt = theGrid.scrollPosition;
//
// scroll with animation
if (true) {
wjCore.animate(function (pct) {
var y = (pt.y * (1 - pct)) + (-rc.top * pct);
theGrid.scrollPosition = new wjCore.Point(pt.x, y);
}, 300);
}
else { // or without
theGrid.scrollPosition = new wjCore.Point(pt.x, -rc.top);
}
break;
}
}
}
}
//
}

<!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">
<!-- 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>
System.import('./src/app');
</script>
</head>
<body>
<div class="container-fluid">
<div id="theGrid">
</div>
</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;
}
body {
margin-bottom: 20px;
}

(function (global) {
System.config({
transpiler: 'plugin-babel',
babelOptions: {
es2015: 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': 'npm:@mescius/wijmo.grid.multirow/index.js',
'@mescius/wijmo.grid.transposed': 'npm:@mescius/wijmo.grid.transposed/index.js',
'@mescius/wijmo.grid.transposedmultirow': 'npm:@mescius/wijmo.grid.transposedmultirow/index.js',
'@mescius/wijmo.grid.pdf': 'npm:@mescius/wijmo.grid.pdf/index.js',
'@mescius/wijmo.grid.sheet': 'npm:@mescius/wijmo.grid.sheet/index.js',
'@mescius/wijmo.grid.xlsx': 'npm:@mescius/wijmo.grid.xlsx/index.js',
'@mescius/wijmo.grid.selector': 'npm:@mescius/wijmo.grid.selector/index.js',
'@mescius/wijmo.grid.cellmaker': 'npm:@mescius/wijmo.grid.cellmaker/index.js',
'@mescius/wijmo.nav': 'npm:@mescius/wijmo.nav/index.js',
'@mescius/wijmo.odata': 'npm:@mescius/wijmo.odata/index.js',
'@mescius/wijmo.olap': 'npm:@mescius/wijmo.olap/index.js',
'@mescius/wijmo.rest': 'npm:@mescius/wijmo.rest/index.js',
'@mescius/wijmo.pdf': 'npm:@mescius/wijmo.pdf/index.js',
'@mescius/wijmo.pdf.security': 'npm:@mescius/wijmo.pdf.security/index.js',
'@mescius/wijmo.viewer': 'npm:@mescius/wijmo.viewer/index.js',
'@mescius/wijmo.xlsx': 'npm:@mescius/wijmo.xlsx/index.js',
'@mescius/wijmo.undo': 'npm:@mescius/wijmo.undo/index.js',
'@mescius/wijmo.interop.grid': 'npm:@mescius/wijmo.interop.grid/index.js',
'@mescius/wijmo.touch': 'npm:@mescius/wijmo.touch/index.js',
'@mescius/wijmo.cloud': 'npm:@mescius/wijmo.cloud/index.js',
'@mescius/wijmo.barcode': 'npm:@mescius/wijmo.barcode/index.js',
'@mescius/wijmo.barcode.common': 'npm:@mescius/wijmo.barcode.common/index.js',
'@mescius/wijmo.barcode.composite': 'npm:@mescius/wijmo.barcode.composite/index.js',
'@mescius/wijmo.barcode.specialized': 'npm:@mescius/wijmo.barcode.specialized/index.js',
'jszip': 'npm:jszip/dist/jszip.js',
'bootstrap.css': 'npm:bootstrap/dist/css/bootstrap.min.css',
'css': 'npm:systemjs-plugin-css/css.js',
'plugin-babel': 'npm:systemjs-plugin-babel/plugin-babel.js',
'systemjs-babel-build':'npm:systemjs-plugin-babel/systemjs-babel-browser.js'
},
// packages tells the System loader how to load when no filename and/or no extension
packages: {
src: {
defaultExtension: 'js'
},
"node_modules": {
defaultExtension: 'js'
},
}
});
})(this);