FlexGrid Spinners

This sample shows how you can add spinners to the FlexGrid control to indicate it is loading data. The basic idea is to add a spinner element to the grid when you start loading the data, and remove the spinner when you get the data back.

Learn about FlexGrid | Loading Data Documentation | CollectionView API Reference

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import * as grid from '@grapecity/wijmo.grid'; import * as gauge from '@grapecity/wijmo.gauge'; import { getData } from './data'; import * as core from '@grapecity/wijmo'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // create a grid to use with GIF spinner let theGridGif = new grid.FlexGrid('#theGridGif'); let theSpinnerGif = document.querySelector('#theSpinnerGif'); const gifWrapper = document.querySelector('#gifWrapper'); // // load data into the grid document.querySelector('#btn-load-gif').addEventListener('click', () => { // prepare to load data theGridGif.isDisabled = true; theGridGif.itemsSource = null; core.toggleClass(theGridGif.hostElement, 'hidden'); gifWrapper.appendChild(theSpinnerGif); // // load data with a delay getData((data) => { theGridGif.itemsSource = data; theGridGif.isDisabled = false; core.removeChild(theSpinnerGif); core.toggleClass(theGridGif.hostElement, 'hidden'); }, 3000); }); // // create a grid to use with Gauge spinner let theGridGauge = new grid.FlexGrid('#theGridGauge'); const gaugeWrapper = document.querySelector('#gaugeWrapper'); // // load data into the grid document.querySelector('#btn-load-gauge').addEventListener('click', () => { // // prepare to load data core.toggleClass(theGridGauge.hostElement, 'hidden'); theGridGauge.itemsSource = null; setSpinner(theGridGauge, true); // // load data getData((data) => { theGridGauge.itemsSource = data; setSpinner(theGridGauge, false); core.toggleClass(theGridGauge.hostElement, 'hidden'); }, 3000); }); // // create a spinner Gauge let theSpinnerInterval; let theSpinnerGauge = new gauge.RadialGauge('#theSpinnerGauge', { isAnimated: false, showText: 'None', sweepAngle: 360, step: 5, showTicks: true, face: { color: 'transparent' } }); // // add or remove a spinner to/from the grid function setSpinner(grid, on) { // stop spinner if (theSpinnerInterval) { clearInterval(theSpinnerInterval); theSpinnerInterval = null; } // // add/remove spinner let spinner = theSpinnerGauge.hostElement; if (on) { grid.isDisabled = true; gaugeWrapper.appendChild(spinner); theSpinnerGauge.invalidate(); theSpinnerGauge.value = 0; theSpinnerInterval = setInterval(() => { theSpinnerGauge.value = (theSpinnerGauge.value + 1) % 100; }, 50); } else { grid.isDisabled = false; core.removeChild(spinner); } } }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo FlexGrid Spinners</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"> <h3> GIF Spinners</h3> <p> This example shows an animated GIF while the grid is loading:</p> <button id="btn-load-gif" class="btn btn-primary"> Load Grid Using GIF Spinner </button> <div id="gifWrapper"> <div id="theGridGif"></div> <div style="display:none"> <div id="theSpinnerGif" class="spinner"> <img src="resources/Rounded%20blocks.gif"> </div> </div> </div> <h3> Gauge Spinners </h3> <p> This example shows an animated RadialGauge while the grid is loading:</p> <button id="btn-load-gauge" class="btn btn-primary"> Load Grid Using Gauge Spinner </button> <div id="gaugeWrapper"> <div id="theGridGauge"></div> <div style="display:none"> <div id="theSpinnerGauge" class="spinner"></div> </div> </div> </div> </body> </html>
// get some data asynchronously export function getData(callback, delay) { let countries = ['US', 'UK', 'China', 'Germany', 'India'], data = []; // for (let i = 0; i < 1000; i++) { data.push({ id: i, country: countries[i % countries.length], sales: Math.random() * 1000, downloads: Math.random() * 10000, }); } // setTimeout(() => callback(data), delay); }
.wj-flexgrid { max-height: 250px; } .wj-radialgauge.spinner { margin: auto auto; padding-bottom: 32px; max-width: 200px; } .spinner img, .spinner.wj-gauge { display: block; margin: auto; margin-top: 20px; } .btn { margin-bottom: 6px; } body { margin-bottom: 24pt; }
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