Demos
Wijmo(React)
CollectionView
Editing Views
Tracking Changes

Tracking Changings in CollectionView (React)

The CollectionView can help by keeping track of modified items when the trackChanges property is set to true. When enabled, the CollectionView updates the itemsAdded, itemsRemoved, and itemsEdited collections as content is edited. This sample displays these collections in separate grids to show how the changes are tracked.

Learn about FlexGrid | Editing Views Documentation | CollectionView API Reference

This example uses React.

JavaScript
Angular
Vue
React
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app.jsx
index.html
app.css
data.jsx
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import 'bootstrap.css';
import '@mescius/wijmo.styles/wijmo.css';
import ReactDOM from 'react-dom/client';
import React from 'react';
import { CollectionView } from '@mescius/wijmo';
import { FlexGrid } from '@mescius/wijmo.react.grid';
import './app.css';
import { data } from './data';
const view = new CollectionView(data, {
    sortDescriptions: ["country"],
    trackChanges: true
});
function App() {
    return (<div className="container-fluid">
      <div className="row">
        <div className="col-xs-6">
          <FlexGrid itemsSource={view} allowAddNew={true} allowDelete={true}/>
        </div>
        <div className="col-xs-6">
          <h4>Edited Items:</h4>
          <FlexGrid className="changed edited" itemsSource={view.itemsEdited} isReadOnly={true}/>
          <h4>Added Items:</h4>
          <FlexGrid className="changed added" itemsSource={view.itemsAdded} isReadOnly={true}/>
          <h4>Removed Items:</h4>
          <FlexGrid className="changed removed" itemsSource={view.itemsRemoved} isReadOnly={true}/>
        </div>
      </div>
    </div>);
}
const container = document.getElementById('app');
if (container) {
    const root = ReactDOM.createRoot(container);
    root.render(<App />);
}
import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import ReactDOM from 'react-dom/client'; import React from 'react'; import { CollectionView } from '@mescius/wijmo'; import { FlexGrid } from '@mescius/wijmo.react.grid'; import './app.css'; import { data } from './data'; const view = new CollectionView(data, { sortDescriptions: ["country"], trackChanges: true }); function App() { return (<div className="container-fluid"> <div className="row"> <div className="col-xs-6"> <FlexGrid itemsSource={view} allowAddNew={true} allowDelete={true}/> </div> <div className="col-xs-6"> <h4>Edited Items:</h4> <FlexGrid className="changed edited" itemsSource={view.itemsEdited} isReadOnly={true}/> <h4>Added Items:</h4> <FlexGrid className="changed added" itemsSource={view.itemsAdded} isReadOnly={true}/> <h4>Removed Items:</h4> <FlexGrid className="changed removed" itemsSource={view.itemsRemoved} isReadOnly={true}/> </div> </div> </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 CollectionView Change Tracking</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:not(.changed) { height: 300px; } .changed { font-size: 90%; background-color: #f0f0f0 } .edited { color: orange } .added { color: green } .removed { color: red }
function getData() { let countries = ['US', 'Germany', 'UK', 'Japan', 'Italy'], data = []; for (let i = 0; i < countries.length; i++) { data.push({ country: countries[i], downloads: Math.round(Math.random() * 20000), sales: Math.random() * 10000, expenses: Math.random() * 5000 }); } return data; } export const data = getData();
(function (global) { window.process = { env: { NODE_ENV: "production" } } 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', 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'systemjs-babel-build':'npm:systemjs-plugin-babel/systemjs-babel-browser.js', "react-use-event-hook": "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);