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angular-google-charts

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A wrapper for the Google Charts library written with Angular

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import { ChangeDetectionStrategy, Component, ElementRef, EventEmitter, Input, Optional, Output } from '@angular/core'; import { fromEvent, ReplaySubject } from 'rxjs'; import { debounceTime } from 'rxjs/operators'; import { getPackageForChart } from '../../helpers/chart.helper'; import { DataTableService } from '../../services/data-table.service'; import { ScriptLoaderService } from '../../services/script-loader.service'; import { ChartType } from '../../types/chart-type'; import { DashboardComponent } from '../dashboard/dashboard.component'; import * as i0 from "@angular/core"; import * as i1 from "../../services/script-loader.service"; import * as i2 from "../../services/data-table.service"; import * as i3 from "../dashboard/dashboard.component"; export class GoogleChartComponent { constructor(element, scriptLoaderService, dataTableService, dashboard) { this.element = element; this.scriptLoaderService = scriptLoaderService; this.dataTableService = dataTableService; this.dashboard = dashboard; /** * The chart-specific options. All options listen in the Google Charts documentation applying * to the chart type specified can be used here. */ this.options = {}; /** * If this is set to `true`, the chart will be redrawn if the browser window is resized. * Defaults to `false` and should only be used when specifying the width or height of the chart * in percent. * * Note that this can impact performance. */ this.dynamicResize = false; this.ready = new EventEmitter(); this.error = new EventEmitter(); this.select = new EventEmitter(); this.mouseover = new EventEmitter(); this.mouseleave = new EventEmitter(); this.wrapperReadySubject = new ReplaySubject(1); this.initialized = false; this.eventListeners = new Map(); } get chart() { return this.chartWrapper.getChart(); } get wrapperReady$() { return this.wrapperReadySubject.asObservable(); } get chartWrapper() { if (!this.wrapper) { throw new Error('Trying to access the chart wrapper before it was fully initialized'); } return this.wrapper; } set chartWrapper(wrapper) { this.wrapper = wrapper; this.drawChart(); } ngOnInit() { // We don't need to load any chart packages, the chart wrapper will handle this for us this.scriptLoaderService.loadChartPackages(getPackageForChart(this.type)).subscribe(() => { this.dataTable = this.dataTableService.create(this.data, this.columns, this.formatters); // Only ever create the wrapper once to allow animations to happen when something changes. this.wrapper = new google.visualization.ChartWrapper({ container: this.element.nativeElement, chartType: this.type, dataTable: this.dataTable, options: this.mergeOptions() }); this.registerChartEvents(); this.wrapperReadySubject.next(this.wrapper); this.initialized = true; this.drawChart(); }); } ngOnChanges(changes) { if (changes.dynamicResize) { this.updateResizeListener(); } if (this.initialized) { let shouldRedraw = false; if (changes.data || changes.columns || changes.formatters) { this.dataTable = this.dataTableService.create(this.data, this.columns, this.formatters); this.wrapper.setDataTable(this.dataTable); shouldRedraw = true; } if (changes.type) { this.wrapper.setChartType(this.type); shouldRedraw = true; } if (changes.options || changes.width || changes.height || changes.title) { this.wrapper.setOptions(this.mergeOptions()); shouldRedraw = true; } if (shouldRedraw) { this.drawChart(); } } } ngOnDestroy() { this.unsubscribeToResizeIfSubscribed(); } /** * For listening to events other than the most common ones (available via Output properties). * * Can be called after the chart emits that it's "ready". * * Returns a handle that can be used for `removeEventListener`. */ addEventListener(eventName, callback) { const handle = this.registerChartEvent(this.chart, eventName, callback); this.eventListeners.set(handle, { eventName, callback, handle }); return handle; } removeEventListener(handle) { const entry = this.eventListeners.get(handle); if (entry) { google.visualization.events.removeListener(entry.handle); this.eventListeners.delete(handle); } } updateResizeListener() { this.unsubscribeToResizeIfSubscribed(); if (this.dynamicResize) { this.resizeSubscription = fromEvent(window, 'resize', { passive: true }) .pipe(debounceTime(100)) .subscribe(() => { if (this.initialized) { this.drawChart(); } }); } } unsubscribeToResizeIfSubscribed() { if (this.resizeSubscription != null) { this.resizeSubscription.unsubscribe(); this.resizeSubscription = undefined; } } mergeOptions() { return { title: this.title, width: this.width, height: this.height, ...this.options }; } registerChartEvents() { google.visualization.events.removeAllListeners(this.wrapper); this.registerChartEvent(this.wrapper, 'ready', () => { // This could also be done by checking if we already subscribed to the events google.visualization.events.removeAllListeners(this.chart); this.registerChartEvent(this.chart, 'onmouseover', (event) => this.mouseover.emit(event)); this.registerChartEvent(this.chart, 'onmouseout', (event) => this.mouseleave.emit(event)); this.registerChartEvent(this.chart, 'select', () => { const selection = this.chart.getSelection(); this.select.emit({ selection }); }); this.eventListeners.forEach(x => (x.handle = this.registerChartEvent(this.chart, x.eventName, x.callback))); this.ready.emit({ chart: this.chart }); }); this.registerChartEvent(this.wrapper, 'error', (error) => this.error.emit(error)); } registerChartEvent(object, eventName, callback) { return google.visualization.events.addListener(object, eventName, callback); } drawChart() { if (this.dashboard != null) { // If this chart is part of a dashboard, the dashboard takes care of drawing return; } this.wrapper.draw(); } static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: GoogleChartComponent, deps: [{ token: i0.ElementRef }, { token: i1.ScriptLoaderService }, { token: i2.DataTableService }, { token: i3.DashboardComponent, optional: true }], target: i0.ɵɵFactoryTarget.Component }); } static { this.ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "14.0.0", version: "16.2.12", type: GoogleChartComponent, selector: "google-chart", inputs: { type: "type", data: "data", columns: "columns", title: "title", width: "width", height: "height", options: "options", formatters: "formatters", dynamicResize: "dynamicResize" }, outputs: { ready: "ready", error: "error", select: "select", mouseover: "mouseover", mouseleave: "mouseleave" }, host: { classAttribute: "google-chart" }, exportAs: ["googleChart"], usesOnChanges: true, ngImport: i0, template: '', isInline: true, styles: [":host{width:-moz-fit-content;width:fit-content;display:block}\n"], changeDetection: i0.ChangeDetectionStrategy.OnPush }); } } i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.12", ngImport: i0, type: GoogleChartComponent, decorators: [{ type: Component, args: [{ selector: 'google-chart', template: '', host: { class: 'google-chart' }, exportAs: 'googleChart', changeDetection: ChangeDetectionStrategy.OnPush, styles: [":host{width:-moz-fit-content;width:fit-content;display:block}\n"] }] }], ctorParameters: function () { return [{ type: i0.ElementRef }, { type: i1.ScriptLoaderService }, { type: i2.DataTableService }, { type: i3.DashboardComponent, decorators: [{ type: Optional }] }]; }, propDecorators: { type: [{ type: Input }], data: [{ type: Input }], columns: [{ type: Input }], title: [{ type: Input }], width: [{ type: Input }], height: [{ type: Input }], options: [{ type: Input }], formatters: [{ type: Input }], dynamicResize: [{ type: Input }], ready: [{ type: Output }], error: [{ type: Output }], select: [{ type: Output }], mouseover: [{ type: Output }], mouseleave: [{ type: Output }] } }); //# 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{\n  ChangeDetectionStrategy,\n  Component,\n  ElementRef,\n  EventEmitter,\n  Input,\n  OnChanges,\n  OnDestroy,\n  OnInit,\n  Optional,\n  Output,\n  SimpleChanges\n} from '@angular/core';\nimport { fromEvent, Observable, ReplaySubject, Subscription } from 'rxjs';\nimport { debounceTime } from 'rxjs/operators';\n\nimport { getPackageForChart } from '../../helpers/chart.helper';\nimport { DataTableService } from '../../services/data-table.service';\nimport { ScriptLoaderService } from '../../services/script-loader.service';\nimport { ChartType } from '../../types/chart-type';\nimport {\n  ChartErrorEvent,\n  ChartMouseLeaveEvent,\n  ChartMouseOverEvent,\n  ChartReadyEvent,\n  ChartSelectionChangedEvent\n} from '../../types/events';\nimport { Formatter } from '../../types/formatter';\nimport { ChartBase, Column, Row } from '../chart-base/chart-base.component';\nimport { DashboardComponent } from '../dashboard/dashboard.component';\n\n@Component({\n  selector: 'google-chart',\n  template: '',\n  styles: [':host { width: fit-content; display: block; }'],\n  host: { class: 'google-chart' },\n  exportAs: 'googleChart',\n  changeDetection: ChangeDetectionStrategy.OnPush\n})\nexport class GoogleChartComponent implements ChartBase, OnInit, OnChanges, OnDestroy {\n  /**\n   * The type of the chart to create.\n   */\n  @Input()\n  public type!: ChartType;\n\n  /**\n   * Data used to initialize the table.\n   *\n   * This must also contain all roles that are set in the `columns` property.\n   */\n  @Input()\n  public data!: Row[];\n\n  /**\n   * The columns the `data` consists of.\n   * The length of this array must match the length of each row in the `data` object.\n   *\n   * If {@link https://developers.google.com/chart/interactive/docs/roles roles} should be applied, they must be included in this array as well.\n   */\n  @Input()\n  public columns?: Column[];\n\n  /**\n   * A convenience property used to set the title of the chart.\n   *\n   * This can also be set using `options.title`, which, if existant, will overwrite this value.\n   */\n  @Input()\n  public title?: string;\n\n  /**\n   * A convenience property used to set the width of the chart in pixels.\n   *\n   * This can also be set using `options.width`, which, if existant, will overwrite this value.\n   */\n  @Input()\n  public width?: number;\n\n  /**\n   * A convenience property used to set the height of the chart in pixels.\n   *\n   * This can also be set using `options.height`, which, if existant, will overwrite this value.\n   */\n  @Input()\n  public height?: number;\n\n  /**\n   * The chart-specific options. All options listen in the Google Charts documentation applying\n   * to the chart type specified can be used here.\n   */\n  @Input()\n  public options: object = {};\n\n  /**\n   * Used to change the displayed value of the specified column in all rows.\n   *\n   * Each array element must consist of an instance of a [`formatter`](https://developers.google.com/chart/interactive/docs/reference#formatters)\n   * and the index of the column you want the formatter to get applied to.\n   */\n  @Input()\n  public formatters?: Formatter[];\n\n  /**\n   * If this is set to `true`, the chart will be redrawn if the browser window is resized.\n   * Defaults to `false` and should only be used when specifying the width or height of the chart\n   * in percent.\n   *\n   * Note that this can impact performance.\n   */\n  @Input()\n  public dynamicResize = false;\n\n  @Output()\n  public ready = new EventEmitter<ChartReadyEvent>();\n\n  @Output()\n  public error = new EventEmitter<ChartErrorEvent>();\n\n  @Output()\n  public select = new EventEmitter<ChartSelectionChangedEvent>();\n\n  @Output()\n  public mouseover = new EventEmitter<ChartMouseOverEvent>();\n\n  @Output()\n  public mouseleave = new EventEmitter<ChartMouseLeaveEvent>();\n\n  private resizeSubscription?: Subscription;\n\n  private dataTable: google.visualization.DataTable | undefined;\n  private wrapper: google.visualization.ChartWrapper | undefined;\n  private wrapperReadySubject = new ReplaySubject<google.visualization.ChartWrapper>(1);\n  private initialized = false;\n  private eventListeners = new Map<any, { eventName: string; callback: Function; handle: any }>();\n\n  constructor(\n    private element: ElementRef,\n    private scriptLoaderService: ScriptLoaderService,\n    private dataTableService: DataTableService,\n    @Optional() private dashboard?: DashboardComponent\n  ) {}\n\n  public get chart(): google.visualization.ChartBase | null {\n    return this.chartWrapper.getChart();\n  }\n\n  public get wrapperReady$(): Observable<google.visualization.ChartWrapper> {\n    return this.wrapperReadySubject.asObservable();\n  }\n\n  public get chartWrapper(): google.visualization.ChartWrapper {\n    if (!this.wrapper) {\n      throw new Error('Trying to access the chart wrapper before it was fully initialized');\n    }\n\n    return this.wrapper;\n  }\n\n  public set chartWrapper(wrapper: google.visualization.ChartWrapper) {\n    this.wrapper = wrapper;\n    this.drawChart();\n  }\n\n  public ngOnInit() {\n    // We don't need to load any chart packages, the chart wrapper will handle this for us\n    this.scriptLoaderService.loadChartPackages(getPackageForChart(this.type)).subscribe(() => {\n      this.dataTable = this.dataTableService.create(this.data, this.columns, this.formatters);\n\n      // Only ever create the wrapper once to allow animations to happen when something changes.\n      this.wrapper = new google.visualization.ChartWrapper({\n        container: this.element.nativeElement,\n        chartType: this.type,\n        dataTable: this.dataTable,\n        options: this.mergeOptions()\n      });\n\n      this.registerChartEvents();\n\n      this.wrapperReadySubject.next(this.wrapper);\n      this.initialized = true;\n\n      this.drawChart();\n    });\n  }\n\n  public ngOnChanges(changes: SimpleChanges) {\n    if (changes.dynamicResize) {\n      this.updateResizeListener();\n    }\n\n    if (this.initialized) {\n      let shouldRedraw = false;\n      if (changes.data || changes.columns || changes.formatters) {\n        this.dataTable = this.dataTableService.create(this.data, this.columns, this.formatters);\n        this.wrapper!.setDataTable(this.dataTable!);\n        shouldRedraw = true;\n      }\n\n      if (changes.type) {\n        this.wrapper!.setChartType(this.type);\n        shouldRedraw = true;\n      }\n\n      if (changes.options || changes.width || changes.height || changes.title) {\n        this.wrapper!.setOptions(this.mergeOptions());\n        shouldRedraw = true;\n      }\n\n      if (shouldRedraw) {\n        this.drawChart();\n      }\n    }\n  }\n\n  public ngOnDestroy(): void {\n    this.unsubscribeToResizeIfSubscribed();\n  }\n\n  /**\n   * For listening to events other than the most common ones (available via Output properties).\n   *\n   * Can be called after the chart emits that it's \"ready\".\n   *\n   * Returns a handle that can be used for `removeEventListener`.\n   */\n  public addEventListener(eventName: string, callback: Function): any {\n    const handle = this.registerChartEvent(this.chart, eventName, callback);\n    this.eventListeners.set(handle, { eventName, callback, handle });\n    return handle;\n  }\n\n  public removeEventListener(handle: any): void {\n    const entry = this.eventListeners.get(handle);\n    if (entry) {\n      google.visualization.events.removeListener(entry.handle);\n      this.eventListeners.delete(handle);\n    }\n  }\n\n  private updateResizeListener() {\n    this.unsubscribeToResizeIfSubscribed();\n\n    if (this.dynamicResize) {\n      this.resizeSubscription = fromEvent(window, 'resize', { passive: true })\n        .pipe(debounceTime(100))\n        .subscribe(() => {\n          if (this.initialized) {\n            this.drawChart();\n          }\n        });\n    }\n  }\n\n  private unsubscribeToResizeIfSubscribed() {\n    if (this.resizeSubscription != null) {\n      this.resizeSubscription.unsubscribe();\n      this.resizeSubscription = undefined;\n    }\n  }\n\n  private mergeOptions(): object {\n    return {\n      title: this.title,\n      width: this.width,\n      height: this.height,\n      ...this.options\n    };\n  }\n\n  private registerChartEvents() {\n    google.visualization.events.removeAllListeners(this.wrapper);\n\n    this.registerChartEvent(this.wrapper, 'ready', () => {\n      // This could also be done by checking if we already subscribed to the events\n      google.visualization.events.removeAllListeners(this.chart);\n      this.registerChartEvent(this.chart, 'onmouseover', (event: ChartMouseOverEvent) => this.mouseover.emit(event));\n      this.registerChartEvent(this.chart, 'onmouseout', (event: ChartMouseLeaveEvent) => this.mouseleave.emit(event));\n      this.registerChartEvent(this.chart, 'select', () => {\n        const selection = this.chart!.getSelection();\n        this.select.emit({ selection });\n      });\n      this.eventListeners.forEach(x => (x.handle = this.registerChartEvent(this.chart, x.eventName, x.callback)));\n\n      this.ready.emit({ chart: this.chart! });\n    });\n\n    this.registerChartEvent(this.wrapper, 'error', (error: ChartErrorEvent) => this.error.emit(error));\n  }\n\n  private registerChartEvent(object: any, eventName: string, callback: Function): any {\n    return google.visualization.events.addListener(object, eventName, callback);\n  }\n\n  private drawChart() {\n    if (this.dashboard != null) {\n      // If this chart is part of a dashboard, the dashboard takes care of drawing\n      return;\n    }\n\n    this.wrapper!.draw();\n  }\n}\n"]}