Annotations

The sample shows basic usage of the AnnotationLayer class and various built-in types of Annotations, including: Circle, Ellipse, Image, Line, Polygon, Rectangle, Square and Text.

You can use attachment property to set different attach types of annotation.

Learn about FlexChart | Annotation Documentation | FlexChart API Reference

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import * as wjChart from '@grapecity/wijmo.chart'; import * as wjAnnotation from '@grapecity/wijmo.chart.annotation'; import { getData, getAnnotation } from './data'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // create the chart let theChart = new wjChart.FlexChart('#theChart', { bindingX: 'date', chartType: 'Line', itemsSource: getData(), series: [ { name: 'Sale', binding: 'sale' } ] }); var basicAL = new wjAnnotation.AnnotationLayer(theChart, getAnnotation()); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Wijmo FlexChart Annotations</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="theChart"></div> </div> </body> </html>
import * as core from '@grapecity/wijmo'; export function getAnnotation() { let data = [ { "type": "Circle", "radius": 40, "offset": { "x": 0, "y": -15 }, "seriesIndex": 0, "pointIndex": 33, "content": "DataIndex", "position": 0, "attachment": 0, "tooltip": "This is a circle annotation. </br> radius: 40 </br> pointIndex: 33 </br> attachment: DataIndex", "style": { "fill": "#a3d1a7", "stroke": "#7b9e7e", "fill-opacity": 1, "stroke-width": 2, "stroke-opacity": 1 } }, { "type": "Square", "length": 80, "offset": { "x": 0, "y": -15 }, "seriesIndex": 0, "pointIndex": 45, "content": "DataIndex", "position": 0, "attachment": 0, "tooltip": "This is a square annotation. </br>length: 80 </br> pointIndex: 45 </br> attachment: DataIndex", "style": { "fill": "#c4af71", "stroke": "#918254", "fill-opacity": 1, "stroke-width": 2, "stroke-opacity": 1 } }, { "type": "Line", "content": "Absolute", "position": 0, "start": { "x": 50, "y": 150 }, "end": { "x": 350, "y": 300 }, "tooltip": "This is a line annotation. </br> start: { x: 50, y: 150 } end: { x: 350, y: 300 } </br> attachment: Absolute", "style": { "fill": "#FE2E2E", "stroke": "#01A9DB", "fill-opacity": 2, "stroke-width": 4, "stroke-opacity": 1 } }, { "type": "Text", "attachment": 2, "text": "Relative", "position": 0, "point": { "x": 0.55, "y": 0.15 }, "tooltip": "This is a text annotation.</br>point: { x: 0.55, y: 0.15 }</br> attachment: Relative", "style": { "fill": "#bbbbbb", "font-size": "26px" } }, { "type": "Ellipse", "content": "Relative", "position": 0, "attachment": 2, "length": 80, "point": { "x": 0.4, "y": 0.5 }, "seriesIndex": 0, "pointIndex": 45, "tooltip": "This is an ellipse annotation.</br>point: { x: 0.4, y: 0.45 }</br> attachment: Relative", "style": { "fill": "#f5bc78", "stroke": "#c2955f", "fill-opacity": 1, "stroke-width": 2, "stroke-opacity": 1 } }, { "type": "Rectangle", "content": "DataCoordinate", "position": 0, "attachment": 1, "point": { "x": "2014-02-10", "y": 30 }, "tooltip": "This is a rectangle annotation.</br>point:{ x: new Date(2014, 1, 10), y: 40 }</br> attachment: DataCoordinate", "seriesIndex": 0, "pointIndex": 45, "style": { "fill": "#c5aacd", "stroke": "#937f99", "fill-opacity": 1, "stroke-width": 2, "stroke-opacity": 1 } }, { "type": "Image", "position": 0, "attachment": 1, "href": "resources/wijmo5-flexible.png", "point": { "x": "2014-01-25", "y": 30 }, "tooltip": "This is an image annotation.</br>point:{x: new Date(2014, 0, 25), y: 20}</br> attachment: DataCoordinate", "style": { "fill": "#01DFD7", "stroke": "#000000", "fill-opacity": 1, "stroke-width": 1, "stroke-opacity": 1 } }, { "type": "Polygon", "content": "Absolute", "position": 0, "tooltip": "This is a polygon annotation.</br>points: [(200,0),(150,50),(175,100),(255,100),(250, 50)]</br> attachment: Absolute", "style": { "fill": "#FE2E2E", "stroke": "#01A9DB", "fill-opacity": 2, "stroke-width": 4, "stroke-opacity": 1 }, "points": [ { "x": 200, "y": 0 }, { "x": 150, "y": 50 }, { "x": 175, "y": 100 }, { "x": 225, "y": 100 }, { "x": 250, "y": 50 } ] } ]; for (var i = 0; i < data.length; i++) { if (data[i].attachment === 1 && data[i].point && data[i].point.x && isNaN(data[i].point.x)) { data[i].point.x = core.Globalize.parseDate(data[i].point.x, 'yyyy-MM-dd'); } } return data; } // export function getData() { var data = [], sales = [ 96, 19, 54, 83, 15, 56, 36, 4, 29, 93, 38, 71, 50, 77, 69, 13, 79, 57, 29, 62, 4, 27, 66, 96, 65, 12, 52, 3, 61, 48, 50, 70, 39, 33, 25, 49, 69, 46, 44, 40, 35, 72, 64, 10, 66, 63, 78, 19, 96, 26 ]; for (var i = 0; i < 50; i++) { data.push({ sale: sales[i], date: new Date(2014, 0, i), }); } return data; }
.wj-flexchart { margin: 10px 0; } body { margin-bottom: 24pt; }
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