CellMaker Ratings

The CellMaker class provides a simple way to create custom cells of common types.

This sample shows how to use the CellMaker class to create ratings cells, which shows values within a given range as a series of stars.

Ratings cells can be read-only or editable, in which case users may change ratings by clicking on the stars or by using the keyboard.

You may customize the appearance of the rating symbols using CSS. The sample below shows how you can do this for a specific column, replacing the default orange stars with green circles.

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import { CellMaker } from '@grapecity/wijmo.grid.cellmaker'; import { FlexGrid } from '@grapecity/wijmo.grid'; import { CollectionView } from '@grapecity/wijmo'; import { getData, getCountries } from './data'; document.readyState === 'complete' ? init() : window.onload = init; function init() { new FlexGrid('#theGrid', { showMarquee: true, selectionMode: 'MultiRange', autoGenerateColumns: false, columns: [ { binding: 'id', header: 'ID', isReadOnly: true, width: 80 }, { binding: 'country', header: 'Country', dataMap: getCountries() }, { binding: 'rating', header: 'Rating (no stars)' }, // rating (editable) { binding: 'rating', header: 'Rating (editable)', width: 220, align: 'center', cellTemplate: CellMaker.makeRating({ range: [0, 5], label: 'Edit Product Rating' }) }, // rating (read-only) { isReadOnly: true, binding: 'rating', header: 'Rating (read-only)', width: 220, align: 'center', cssClass: 'custom-rating', cellTemplate: CellMaker.makeRating({ range: [0, 5], label: 'See Product Rating' }) } ], itemsSource: new CollectionView(getData(1000), { getError: (item, prop) => { if (prop == 'rating') { if (item.rating < 0 || item.rating > 5) { return 'Ratings should be between zero and five.'; } } return null; // no errors } }) }); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Wijmo FlexGrid CellMaker: Ratings</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.src.js"></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>
export function getCountries() { return 'US,Germany,UK,Japan,Italy,Greece'.split(','); } export function getData(cnt) { let countries = getCountries(), data = []; for (var i = 0; i < cnt; i++) { let country = countries[i % countries.length]; data.push({ id: i, country: country, url: 'https://visit.' + country + '.com', downloads: Math.round(Math.random() * 1000), sales: Math.random() * 2000, expenses: Math.random() * 1000, checked: i % 4 == 0, history: getValues(3 + Math.random() * 20, 100), img: 'https://cdn.grapecity.com/wijmo/images/' + (i % 4 + 1) + '.png', rating: Math.floor(Math.random() * 5) }); } return data; } function getValues(cnt, max) { let values = [], val = Math.random() * max; for (let i = 0; i < cnt; i++) { val = Math.min(max, val + (Math.random() - 0.5) * max / 5); values.push(val); } return values; }
.wj-flexgrid { max-height: 300px; } .wj-flexgrid .wj-cell { padding: 6px 10px; } /* customize the rating symbol/color/size */ .wj-flexgrid .wj-cell.wj-cell-maker.wj-radio-map.custom-rating label { width: .25em; color: green; } .wj-flexgrid .wj-cell.wj-cell-maker.wj-radio-map.custom-rating label:after { transform: scale(12); content: '\2b24'; }
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