Cell Notes

The FlexGrid control allows you to add Excel-style cell notes that will appear when the user hovers over the cell. The notes in the sample below are specified in the data, but the note information is not required to be specified inside of the data object.

The formatItem event is used to check if the cell has a note. If it does, the event handler adds a class to the cell element so it displays a note indicator on the upper right corner of the cell and attaches a tooltip to the element.

Learn about FlexGrid | FlexGrid API Reference

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; import { Tooltip, toggleClass } from '@mescius/wijmo'; import { FlexGrid } from '@mescius/wijmo.grid'; document.readyState === 'complete' ? init() : window.onload = init; function init() { var tooltip = new Tooltip(); new FlexGrid('#theGrid', { alternatingRowStep: 0, lazyRender: false, autoGenerateColumns: false, columns: [ { binding: 'country', header: 'Country' }, { binding: 'downloads', header: 'Downloads', format: 'n0' }, { binding: 'active', header: 'Active' }, { binding: 'sales', header: 'Sales', format: 'n0' }, { binding: 'expenses', header: 'Expenses', format: 'n0' } ], itemsSource: getData(200), // add the wj-has-notes class to cells that have notes and // add a tooltip to the cell element. formatItem: (s, e) => { if (e.panel == s.cells) { var item = s.rows[e.row].dataItem, binding = s.columns[e.col].binding, note = item.notes ? item.notes[binding] : null; toggleClass(e.cell, 'wj-has-notes', note != null); if (note != null) { tooltip.setTooltip(e.cell, '<b>Note:</b><br/>' + note); } } }, // clear all tooltips when updating the view updatingView: () => { tooltip.dispose(); } }); // get some data with notes function getData(cnt) { var countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','), data = []; // create the data for (var i = 0; i < cnt; i++) { data.push({ country: countries[i % countries.length], active: i % 5 != 0, downloads: Math.round(Math.random() * 200000), sales: Math.random() * 100000, expenses: Math.random() * 50000 }); } // add some notes for (var i = 0; i < data.length; i++) { var item = data[i], notes = {}; if (item.sales < 5000) { notes.sales = 'What\'s going on in <b>' + item.country + '</b>?'; } if (item.downloads < 20000) { notes.downloads = 'Too few downloads, check adwords...'; } if (item.expenses > 40000) { notes.expenses = 'We\'re spending too much here!'; } if (item.country == countries[0] && !item.active) { notes.country = 'Why isn\'t this active?'; } if (Object.keys(notes).length) { item.notes = notes; } } // done return data; } }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo FlexGrid Cell Notes</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 { height: 350px; } .wj-cell { border-color: #e0e0e0; } .wj-cell.wj-has-notes:after { position: absolute; content: ''; width: 0; right: 0; top: -10px; border: 10px solid transparent; border-right: 10px solid red; opacity: .5; } .wj-cell.wj-has-notes:hover:after { opacity: 1; } body { margin-bottom: 24pt }
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