Igor Kulikov
5 years ago
7 changed files with 225 additions and 6 deletions
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<!-- |
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Copyright © 2016-2021 The Thingsboard Authors |
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Licensed under the Apache License, Version 2.0 (the "License"); |
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you may not use this file except in compliance with the License. |
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You may obtain a copy of the License at |
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http://www.apache.org/licenses/LICENSE-2.0 |
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Unless required by applicable law or agreed to in writing, software |
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distributed under the License is distributed on an "AS IS" BASIS, |
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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See the License for the specific language governing permissions and |
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limitations under the License. |
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--> |
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<div fxLayout="column" fxLayoutAlign="center center" style="width: 100%; height: 100%;"> |
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<canvas fxFlex #canvas [ngStyle]="{display: qrCodeText ? 'block' : 'none'}"></canvas> |
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<div *ngIf="!qrCodeText" translate>entity.no-data</div> |
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</div> |
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///
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/// Copyright © 2016-2021 The Thingsboard Authors
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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import { AfterViewInit, ChangeDetectorRef, Component, ElementRef, Input, OnInit, ViewChild } from '@angular/core'; |
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import { PageComponent } from '@shared/components/page.component'; |
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import { WidgetContext } from '@home/models/widget-component.models'; |
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import { Store } from '@ngrx/store'; |
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import { AppState } from '@core/core.state'; |
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import QRCode from 'qrcode'; |
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import { |
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fillPattern, |
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parseData, |
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parseFunction, |
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processPattern, |
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safeExecute |
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} from '@home/components/widget/lib/maps/common-maps-utils'; |
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import { FormattedData } from '@home/components/widget/lib/maps/map-models'; |
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import { DatasourceData } from '@shared/models/widget.models'; |
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import { DataKeyType } from '@shared/models/telemetry/telemetry.models'; |
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interface QrCodeWidgetSettings { |
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qrCodeTextPattern: string; |
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useQrCodeTextFunction: boolean; |
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qrCodeTextFunction: string; |
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} |
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type QrCodeTextFunction = (data: FormattedData) => string; |
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@Component({ |
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selector: 'tb-qrcode-widget', |
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templateUrl: './qrcode-widget.component.html', |
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styleUrls: [] |
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}) |
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export class QrCodeWidgetComponent extends PageComponent implements OnInit, AfterViewInit { |
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settings: QrCodeWidgetSettings; |
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qrCodeTextFunction: QrCodeTextFunction; |
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@Input() |
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ctx: WidgetContext; |
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qrCodeText: string; |
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private viewInited: boolean; |
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private scheduleUpdateCanvas: boolean; |
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@ViewChild('canvas', {static: false}) canvasRef: ElementRef<HTMLCanvasElement>; |
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constructor(protected store: Store<AppState>, |
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protected cd: ChangeDetectorRef) { |
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super(store); |
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} |
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ngOnInit(): void { |
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this.ctx.$scope.qrCodeWidget = this; |
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this.settings = this.ctx.settings; |
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this.qrCodeTextFunction = this.settings.useQrCodeTextFunction ? parseFunction(this.settings.qrCodeTextFunction, ['data']) : null; |
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} |
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ngAfterViewInit(): void { |
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this.viewInited = true; |
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if (this.scheduleUpdateCanvas) { |
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this.scheduleUpdateCanvas = false; |
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this.updateCanvas(); |
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} |
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} |
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public onDataUpdated() { |
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let initialData: DatasourceData[]; |
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let qrCodeText: string; |
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if (this.ctx.data?.length) { |
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initialData = this.ctx.data; |
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} else if (this.ctx.datasources?.length) { |
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initialData = [ |
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{ |
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datasource: this.ctx.datasources[0], |
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dataKey: { |
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type: DataKeyType.attribute, |
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name: 'empty' |
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}, |
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data: [] |
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} |
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]; |
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} |
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if (initialData) { |
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const data = parseData(initialData); |
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const dataSourceData = data[0]; |
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const pattern = this.settings.useQrCodeTextFunction ? |
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safeExecute(this.qrCodeTextFunction, [dataSourceData]) : this.settings.qrCodeTextPattern; |
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const replaceInfo = processPattern(pattern, data); |
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qrCodeText = fillPattern(pattern, replaceInfo, dataSourceData); |
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} |
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this.updateQrCodeText(qrCodeText); |
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} |
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private updateQrCodeText(newQrCodeText: string): void { |
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if (this.qrCodeText !== newQrCodeText) { |
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this.qrCodeText = newQrCodeText; |
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if (this.qrCodeText) { |
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this.updateCanvas(); |
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} |
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this.cd.detectChanges(); |
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} |
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} |
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private updateCanvas() { |
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if (this.viewInited) { |
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QRCode.toCanvas(this.canvasRef.nativeElement, this.qrCodeText); |
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this.canvasRef.nativeElement.style.width = 'auto'; |
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this.canvasRef.nativeElement.style.height = 'auto'; |
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} else { |
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this.scheduleUpdateCanvas = true; |
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} |
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} |
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} |
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