Editable Annotations (Angular)

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.

Learn about FlexChart | FlexChart API Reference

This example uses Angular.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; // import '@angular/compiler'; import { Component, Inject, enableProdMode, ViewChild, NgModule, AfterViewInit } from '@angular/core'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { BrowserModule } from '@angular/platform-browser'; import { FormsModule } from '@angular/forms'; import { WjChartModule } from '@mescius/wijmo.angular2.chart'; import { DataService } from './app.data'; import { EditableAnnotationLayer, Button } from './EditableAnnotationLayer'; import { AxisScrollbar } from './AxisScrollbar'; import * as core from '@mescius/wijmo'; import * as wjChart from '@mescius/wijmo.chart'; import * as annotation from '@mescius/wijmo.chart.annotation'; // @Component({ selector: 'app-component', templateUrl: 'src/app.component.html' }) export class AppComponent implements AfterViewInit { data: any[]; isEditable: boolean; al: EditableAnnotationLayer; @ViewChild('theChart', { static: true }) theChart: wjChart.FlexChart; // constructor(@Inject(DataService) private dataService: DataService) { this.data = dataService.getData(); this.isEditable = true; } // editableChange() { if(this.al) { this.al.isEditable = this.isEditable; } } // chartRendered() { let al = this.al; if (!al) { al = new EditableAnnotationLayer(this.theChart); this.al = al; al.isEditable = this.isEditable; //add customize button var triangle: any, triangleBtn = new Button(function (engine: wjChart.IRenderEngine) { 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: any, isDataCoordinate: boolean) { 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: any, currentPoint: any, isDataCoordinate: boolean) { 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 = wjChart.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); } } // ngAfterViewInit() { let axisScrollBar = new AxisScrollbar(this.theChart.axes[0]); window.setTimeout(function () { axisScrollBar.maxPos = 0.5; }, 20); } } // @NgModule({ imports: [FormsModule, WjChartModule, BrowserModule], declarations: [AppComponent], providers: [DataService], bootstrap: [AppComponent] }) export class AppModule { } // enableProdMode(); // Bootstrap application with hash style navigation and global services. platformBrowserDynamic().bootstrapModule(AppModule);
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo FlexChart Editable Annotations</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- Polyfills --> <script src="node_modules/core-js/client/shim.min.js"></script> <script src="node_modules/zone.js/fesm2015/zone.min.js"></script> <!-- 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> // workaround to load 'rxjs/operators' from the rxjs bundle System.import('rxjs').then(function (m) { System.set(SystemJS.resolveSync('rxjs/operators'), System.newModule(m.operators)); System.import('./src/app.component'); }); </script> </head> <body> <app-component></app-component> </body> </html>
<div class="container-fluid"> <div class="form-group"> </div> <div class="form-group"> <label id="labelIsEditable" for="checkboxIsEditable">Is Editable:</label> <input type="checkbox" id="checkboxIsEditable" [(ngModel)]="isEditable" (change)="editableChange()" /> <wj-flex-chart #theChart bindingX="x" chartType="Scatter" [itemsSource]="data" tooltipContent="" (rendered)="chartRendered()"> <wj-flex-chart-series name="Data" binding="y"></wj-flex-chart-series> </wj-flex-chart> </div> </div>
import { Injectable } from '@angular/core'; // @Injectable() export class DataService { getData() { var data = [], numCount = 100; for (var i = 0; i < numCount; i++) { data.push({ x: this.getRandomValue(100), y: this.getRandomValue(1000) }); } return data; } // getRandomValue(max: number) { 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; }
(function (global) { SystemJS.config({ transpiler: './plugin-typescript.js', typescriptOptions: { "target": "ES2022", "module": "system", "emitDecoratorMetadata": true, "experimentalDecorators": true, }, baseURL: 'node_modules/', meta: { 'typescript': { "exports": "ts" }, '*.css': { loader: 'systemjs-plugin-css' } }, paths: { // paths serve as alias 'npm:': '' }, packageConfigPaths: [ '/node_modules/*/package.json', "/node_modules/@angular/*/package.json", "/node_modules/@mescius/*/package.json" ], map: { 'core-js': 'https://cdn.jsdelivr.net/npm/core-js@2.6.12/client/shim.min.js', 'typescript': 'https://cdnjs.cloudflare.com/ajax/libs/typescript/5.2.2/typescript.min.js', "rxjs": "https://cdnjs.cloudflare.com/ajax/libs/rxjs/7.8.1/rxjs.umd.min.js", 'systemjs-plugin-css': 'https://cdn.jsdelivr.net/npm/systemjs-plugin-css@0.1.37/css.js', '@mescius/wijmo': 'npm:@mescius/wijmo/index.js', '@mescius/wijmo.input': 'npm:@mescius/wijmo.input/index.js', '@mescius/wijmo.styles': 'npm:@mescius/wijmo.styles', '@mescius/wijmo.cultures': 'npm:@mescius/wijmo.cultures', '@mescius/wijmo.chart': 'npm:@mescius/wijmo.chart/index.js', '@mescius/wijmo.chart.analytics': 'npm:@mescius/wijmo.chart.analytics/index.js', '@mescius/wijmo.chart.animation': 'npm:@mescius/wijmo.chart.animation/index.js', '@mescius/wijmo.chart.annotation': 'npm:@mescius/wijmo.chart.annotation/index.js', '@mescius/wijmo.chart.finance': 'npm:@mescius/wijmo.chart.finance/index.js', '@mescius/wijmo.chart.finance.analytics': 'npm:@mescius/wijmo.chart.finance.analytics/index.js', '@mescius/wijmo.chart.hierarchical': 'npm:@mescius/wijmo.chart.hierarchical/index.js', '@mescius/wijmo.chart.interaction': 'npm:@mescius/wijmo.chart.interaction/index.js', '@mescius/wijmo.chart.radar': 'npm:@mescius/wijmo.chart.radar/index.js', '@mescius/wijmo.chart.render': 'npm:@mescius/wijmo.chart.render/index.js', '@mescius/wijmo.chart.webgl': 'npm:@mescius/wijmo.chart.webgl/index.js', '@mescius/wijmo.chart.map': 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'https://cdnjs.cloudflare.com/ajax/libs/jszip/3.10.1/jszip.min.js', "@angular/common/http": "https://cdn.jsdelivr.net/npm/@angular/common@16.2.6/fesm2022/http.mjs", "@angular/core": "https://cdn.jsdelivr.net/npm/@angular/core@16.2.6/fesm2022/core.mjs", "@angular/platform-browser": "https://cdn.jsdelivr.net/npm/@angular/platform-browser@16.2.6/fesm2022/platform-browser.mjs", "@angular/common": "https://cdn.jsdelivr.net/npm/@angular/common@16.2.6/fesm2022/common.mjs", "@angular/compiler": "https://cdn.jsdelivr.net/npm/@angular/compiler@16.2.6/fesm2022/compiler.mjs", "@angular/forms": "https://cdn.jsdelivr.net/npm/@angular/forms@16.2.6/fesm2022/forms.mjs", "@angular/localize": "https://cdn.jsdelivr.net/npm/@angular/localize@16.2.6/fesm2022/localize.mjs", "@angular/platform-browser-dynamic": "https://cdn.jsdelivr.net/npm/@angular/platform-browser-dynamic@16.2.6/fesm2022/platform-browser-dynamic.mjs", }, // packages tells the System loader how to load when no filename and/or no extension packages: { "./src": { defaultExtension: 'ts' }, "node_modules": { defaultExtension: 'js' }, wijmo: { defaultExtension: 'js', } } }); })(this);