Line Markers

The LineMarker class allows you to add a mouse-driven cursor to your charts. The cursor consists of a text element used to display information about the point under the mouse and optional lines to indicate the exact position of the mouse.

You can customize the appearance of the LineMarker using CSS, and its behavior using properties including content, interaction, and lines.

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import * as wjChart from '@grapecity/wijmo.chart'; import * as wjCore from '@grapecity/wijmo'; import * as wjInput from '@grapecity/wijmo.input'; import { getData } from './data'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // create the chart let theChart = new wjChart.FlexChart('#theChart', { chartType: 'Line', bindingX: 'date', axisY: { majorGrid: false }, legend: { position: 'None' }, tooltip: { content: '' }, series: [ { binding: 'value', name: 'Value' } ], itemsSource: getData() }); // // add a LineMarker let lm = new wjChart.LineMarker(theChart, { isVisible: false, lines: 'Both', interaction: 'Move', content: (ht) => { return ht.item ? wjCore.format('The value on <b>{date:MMM d, yyyy}</b><br/>is <b>{value:c}</b>', ht.item) : 'No items here...'; } }); // // show the marker when the mouse is over the chart theChart.addEventListener(theChart.hostElement, 'mouseenter', () => { lm.isVisible = true; }); theChart.addEventListener(theChart.hostElement, 'mouseleave', () => { lm.isVisible = false; }); // // configure the LineMarker let lines = new wjInput.ComboBox('#lines', { itemsSource: 'None,Vertical,Horizontal,Both'.split(','), textChanged: (s) => lm.lines = s.text, text: 'Both' }); // let interaction = new wjInput.ComboBox('#interaction', { itemsSource: 'None,Move,Drag'.split(','), textChanged: (s) => lm.interaction = s.text, text: 'Move' }); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Wijmo FlexChart LineMarkers</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"> <label for="lines">Lines: </label> <div id="lines"></div><br> <label for="interaction">Interaction: </label> <div id="interaction"></div> <div id="theChart"></div> </div> </body> </html>
import * as wjCore from '@grapecity/wijmo'; // // create some random data export function getData() { let arr = [], value = 100, date = new Date(); // for (let i = 0; i < 100; i++) { arr.push({ date: date, value: value + Math.random() * 10 - 4 }); // date = wjCore.DateTime.addDays(date, -1); } // return arr; }
.wj-flexchart { height: 300px; margin: 10px 0; } .wj-flexchart .wj-chart-linemarker { background: transparent; } .wj-chart-linemarker-content { padding: 12px; margin: 6px; background: white; border-radius: 3px; box-shadow: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23); } .wj-flexchart .wj-chart-linemarker .wj-chart-linemarker-hline, .wj-flexchart .wj-chart-linemarker .wj-chart-linemarker-vline { height: 1px; width: 1px; opacity: .5; background: navy; } .wj-control { margin-bottom: 3px; } label { width: 120px; text-align: right; } body { margin-bottom: 24pt; }
(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', '@grapecity/wijmo': 'npm:@grapecity/wijmo/index.js', '@grapecity/wijmo.input': 'npm:@grapecity/wijmo.input/index.js', '@grapecity/wijmo.styles': 'npm:@grapecity/wijmo.styles', '@grapecity/wijmo.cultures': 'npm:@grapecity/wijmo.cultures', '@grapecity/wijmo.chart': 'npm:@grapecity/wijmo.chart/index.js', '@grapecity/wijmo.chart.analytics': 'npm:@grapecity/wijmo.chart.analytics/index.js', '@grapecity/wijmo.chart.animation': 'npm:@grapecity/wijmo.chart.animation/index.js', '@grapecity/wijmo.chart.annotation': 'npm:@grapecity/wijmo.chart.annotation/index.js', '@grapecity/wijmo.chart.finance': 'npm:@grapecity/wijmo.chart.finance/index.js', '@grapecity/wijmo.chart.finance.analytics': 'npm:@grapecity/wijmo.chart.finance.analytics/index.js', '@grapecity/wijmo.chart.hierarchical': 'npm:@grapecity/wijmo.chart.hierarchical/index.js', '@grapecity/wijmo.chart.interaction': 'npm:@grapecity/wijmo.chart.interaction/index.js', '@grapecity/wijmo.chart.radar': 'npm:@grapecity/wijmo.chart.radar/index.js', '@grapecity/wijmo.chart.render': 'npm:@grapecity/wijmo.chart.render/index.js', '@grapecity/wijmo.chart.webgl': 'npm:@grapecity/wijmo.chart.webgl/index.js', '@grapecity/wijmo.gauge': 'npm:@grapecity/wijmo.gauge/index.js', '@grapecity/wijmo.grid': 'npm:@grapecity/wijmo.grid/index.js', '@grapecity/wijmo.grid.detail': 'npm:@grapecity/wijmo.grid.detail/index.js', '@grapecity/wijmo.grid.filter': 'npm:@grapecity/wijmo.grid.filter/index.js', '@grapecity/wijmo.grid.search': 'npm:@grapecity/wijmo.grid.search/index.js', '@grapecity/wijmo.grid.grouppanel': 'npm:@grapecity/wijmo.grid.grouppanel/index.js', '@grapecity/wijmo.grid.multirow': 'npm:@grapecity/wijmo.grid.multirow/index.js', '@grapecity/wijmo.grid.transposed': 'npm:@grapecity/wijmo.grid.transposed/index.js', '@grapecity/wijmo.grid.pdf': 'npm:@grapecity/wijmo.grid.pdf/index.js', '@grapecity/wijmo.grid.sheet': 'npm:@grapecity/wijmo.grid.sheet/index.js', '@grapecity/wijmo.grid.xlsx': 'npm:@grapecity/wijmo.grid.xlsx/index.js', '@grapecity/wijmo.grid.selector': 'npm:@grapecity/wijmo.grid.selector/index.js', '@grapecity/wijmo.grid.cellmaker': 'npm:@grapecity/wijmo.grid.cellmaker/index.js', '@grapecity/wijmo.nav': 'npm:@grapecity/wijmo.nav/index.js', '@grapecity/wijmo.odata': 'npm:@grapecity/wijmo.odata/index.js', '@grapecity/wijmo.olap': 'npm:@grapecity/wijmo.olap/index.js', '@grapecity/wijmo.pdf': 'npm:@grapecity/wijmo.pdf/index.js', '@grapecity/wijmo.viewer': 'npm:@grapecity/wijmo.viewer/index.js', '@grapecity/wijmo.xlsx': 'npm:@grapecity/wijmo.xlsx/index.js', '@grapecity/wijmo.undo': 'npm:@grapecity/wijmo.undo/index.js', '@grapecity/wijmo.interop.grid': 'npm:@grapecity/wijmo.interop.grid/index.js', '@grapecity/wijmo.touch': 'npm:@grapecity/wijmo.touch/index.js', '@grapecity/wijmo.cloud': 'npm:@grapecity/wijmo.cloud/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);