Editable Annotations

This page shows how to display and edit annotations on FlexChart.

Following operations of editing annotations are supported in this sample.

  • You can click the button on top left of the chart to choose one of the pre-defined types and styles of annotation. Then click on chart's plot area to add and resize the annotations.
  • You can click Data CoorDinate Button(the left-most) to choose the attachment of added annotation between Absolute and DataCoordinate.
  • You can add a new button to create new annotation type and style by code (The yellow triangle button is a custom button and has been added manually).
  • You can drag the annotations on the chart.
  • You can double click an annotation to edit its text.
  • You can delete an annotation using 'x' button.
import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import * as core from '@grapecity/wijmo'; import * as chart from '@grapecity/wijmo.chart'; import * as annotation from '@grapecity/wijmo.chart.annotation'; import { getData } from './data'; import { EditableAnnotationLayer, Button } from './EditableAnnotationLayer'; import { AxisScrollbar } from './AxisScrollbar'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // create the chart let al; let chkbox = document.querySelector('#checkboxIsEditable'); chkbox.addEventListener('change', () => { al.isEditable = chkbox.checked; }); let theChart = new chart.FlexChart('#theChart', { bindingX: 'x', chartType: 'Scatter', itemsSource: getData(), tooltip: { content: '' }, series: [ { name: 'Data', binding: 'y' } ], rendered: () => { if (!al) { al = new EditableAnnotationLayer(theChart); al.isEditable = chkbox.checked; //add customize button var triangle, triangleBtn = new Button(function (engine) { var triangleIcon = new annotation.Polygon({ tooltip: 'Custom Button - Triangle </br>Select to add Triangle Annotation.', points: [{ x: 10, y: 5 }, { x: 5, y: 15 }, { x: 15, y: 15 }], style: { fill: 'yellow' } }); triangleIcon.render(engine); return triangleIcon._element; }, function (point, isDataCoordinate) { var x = isDataCoordinate ? point.dx : point.x, y = isDataCoordinate ? point.dy : point.y; triangle = new annotation.Polygon({ attachment: isDataCoordinate ? annotation.AnnotationAttachment.DataCoordinate : annotation.AnnotationAttachment.Absolute, tooltip: 'Customize Annotation - Triangle', points: [{ x: x, y: y }, { x: x, y: y }, { x: x, y: y }], style: { fill: 'yellow' } }); al.items.push(triangle); }, function (originPoint, currentPoint, isDataCoordinate) { var ox = isDataCoordinate ? originPoint.dx : originPoint.x, oy = isDataCoordinate ? originPoint.dy : originPoint.y, cx = isDataCoordinate ? currentPoint.dx : currentPoint.x, cy = isDataCoordinate ? currentPoint.dy : currentPoint.y, offsetX = Math.abs(cx - ox), offsetY = cy - oy, isXDate = core.isDate(ox), isYDate = core.isDate(oy), oaDate = chart.FlexChart._fromOADate; triangle.points.clear(); triangle.points.push({ x: ox, y: isYDate ? oaDate(oy - offsetY) : oy - offsetY }); triangle.points.push({ x: isXDate ? oaDate(ox - offsetX) : ox - offsetX, y: isYDate ? oaDate(oy - 0 + offsetY) : oy + offsetY }); triangle.points.push({ x: isXDate ? oaDate(ox - 0 + offsetX) : ox + offsetX, y: isYDate ? oaDate(oy - 0 + offsetY) : oy + offsetY }); }); al.buttons.push(triangleBtn); //add pre-defined annotations. var watermarker = new annotation.Text({ position: annotation.AnnotationPosition.Left | annotation.AnnotationPosition.Top, attachment: annotation.AnnotationAttachment.Relative, text: 'watermarker', tooltip: 'Text Watermarker', point: { x: 1, y: 1 }, style: { 'fill': '#cccccc', 'font-size': '30px', opacity: 0.2 } }); al.items.push(watermarker); var imgmarker = new annotation.Image({ position: annotation.AnnotationPosition.Right | annotation.AnnotationPosition.Top, attachment: annotation.AnnotationAttachment.Relative, tooltip: 'Image Watermarker', point: { x: 0, y: 1 }, width: 128, height: 33, href: 'resources/wijmo-logo-text.png', style: { opacity: 0.2 } }); al.items.push(imgmarker); var centerHLine = new annotation.Line({ attachment: annotation.AnnotationAttachment.DataCoordinate, position: annotation.AnnotationPosition.Center, content: 'Vertical Center Line', start: { x: 50, y: 0 }, end: { x: 50, y: 1000 }, style: { 'stroke-width': '2px', stroke: 'green' } }); al.items.push(centerHLine); var centerVLine = new annotation.Line({ attachment: annotation.AnnotationAttachment.Relative, position: annotation.AnnotationPosition.Center, content: 'Horizontal Center Line', start: { x: 0, y: 0.5 }, end: { x: 1, y: 0.5 }, style: { 'stroke-width': '2px', stroke: 'red' } }); al.items.push(centerVLine); var topRange = new annotation.Polygon({ attachment: annotation.AnnotationAttachment.Relative, points: [{ x: 0, y: 0 }, { x: 0, y: 0.2 }, { x: 1, y: 0.2 }, { x: 1, y: 0 }], content: 'Top Range', style: { fill: '#FEF0DB', opacity: 0.5, stroke: '#FEF0DB' } }); al.items.push(topRange); //flag var pointIndex = 10; ['black', 'blue', 'green', 'red', 'yellow'].forEach(function (v) { var flagSrc = 'resources/flag-' + v + '-icon.png'; var flag = new annotation.Image({ attachment: annotation.AnnotationAttachment.DataIndex, seriesIndex: 0, pointIndex: pointIndex, width: 24, height: 24, href: flagSrc }); al.items.push(flag); pointIndex += 10; }); var rect = new annotation.Rectangle({ attachment: annotation.AnnotationAttachment.DataCoordinate, point: { x: 10, y: 650 }, width: 120, height: 150, style: { 'stroke-dasharray': '4 4', stroke: 'red' } }); al.items.push(rect); var circle = new annotation.Circle({ seriesIndex: 0, attachment: annotation.AnnotationAttachment.DataCoordinate, radius: 80, point: { x: 70, y: 350 }, style: { stroke: 'blue', fill: 'blue', opacity: 0.3 } }); al.items.push(circle); } } }); let axisScrollBar = new AxisScrollbar(theChart.axes[0]); window.setTimeout(function () { axisScrollBar.maxPos = 0.5; }, 20); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Wijmo FlexChart Editable 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"> <label id="labelIsEditable" for="checkboxIsEditable">Is Editable:</label> <input type="checkbox" id="checkboxIsEditable" checked="checked" /></br> <div id="theChart"></div> </div> </body> </html>
// generate some random data export function getData() { var data = [], numCount = 100; for (var i = 0; i < numCount; i++) { data.push({ x: getRandomValue(100), y: getRandomValue(1000) }); } return data; } // function getRandomValue(max) { return Math.round(Math.random() * max); }
.wj-flexchart { margin: 10px 0; } body { margin-bottom: 24pt; } .wj-flexchart .wjanno-editable-layer .wjanno-container { fill: #eee; stroke: #666; stroke-width: 1; } .wj-flexchart .wjanno-editable-layer .wjanno-dc-icon .wjanno-container { fill: #eee; } .wj-flexchart .wjanno-editable-layer .wjanno-icon-selected .wjanno-container { fill: #89E; } .no-selection { user-select: none; -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none; -o-user-select: none; } .wj-flexchart { padding-bottom: 25px; } /**** Axis Scrollbar Css *****/ .wj-flexchart .wj-axis-scrollbar-container { position: relative; } .wj-flexchart .wj-axis-scrollbar-container .wj-chart-rangeslider { border: 1px solid #EAEAEA; background-color: #EAEAEA; border-bottom-left-radius: 6px; border-bottom-right-radius: 6px; border-top-left-radius: 6px; border-top-right-radius: 6px; } .wj-flexchart .wj-axis-scrollbar-container .wj-chart-hrangeslider { height: 20px; } .wj-flexchart .wj-axis-scrollbar-container .wj-chart-vrangeslider { width: 20px; }
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