Progress spinner とは
- 画面処理中を表すくるくる回るやつです。
この記事の目的
- Angular Material のProgress spinnerを組み込みます。
👇これより先は下記記事の内容を前提とします
Progress spinner の組み込み
サービスの作成
ng generate service loading
loading.service.ts
loading.service.ts
import { Injectable } from '@angular/core';
import { Subject } from 'rxjs';
@Injectable({
providedIn: 'root'
})
export class LoadingService {
subject = new Subject<string>();
constructor() { }
setLoading(strMessage: string): void {
this.subject.next(strMessage);
}
unsetLoading(): void {
this.subject.next('');
}
}
Component追加
ng generate component spinner-sample
Material ProgressSpinner 導入
app.module.ts
app.module.ts
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { SpinnerSampleComponent } from './spinner-sample/spinner-sample.component';
import {MatProgressSpinnerModule} from '@angular/material/progress-spinner'; // add
import {MatButtonModule} from '@angular/material/button'; // add
@NgModule({
declarations: [
AppComponent,
SpinnerSampleComponent
],
imports: [
BrowserModule,
AppRoutingModule,
BrowserAnimationsModule,
MatProgressSpinnerModule, // add
MatButtonModule, // add
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
ComponentとSpinnerの組み込み
app.component.ts
app.component.ts
import { Component,OnInit } from '@angular/core';
import { Observable } from 'rxjs';
import { switchMap } from 'rxjs/operators';
import { LoadingService } from './loading.service';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit{
loading$: Observable<string> = this.loadingService.subject.asObservable();
strMsg:string="";
constructor(private loadingService: LoadingService) { }
title = 'material.angular.github';
ngOnInit(): void {
this.loading$.subscribe(
(value: string) => { this.strMsg=value; }
);
}
}
app.component.css
app.component.css
.loading {
display: table;
width: 100%;
height: 100%;
position: fixed;
top: 0;
left: 0;
background-color: #fff;
opacity: 0.8;
z-index: 1;
}
.loading-inner {
display: table-cell;
text-align: center;
vertical-align: middle;
}
mat-spinner {
margin: 0 auto;
}
app.component.html
app.component.html
<div *ngIf="strMsg!==''" class="loading">
<div class="loading-inner">
<mat-spinner></mat-spinner>
{{strMsg}}
</div>
</div>
<app-spinner-sample></app-spinner-sample>
spinner-sample.component.ts
spinner-sample.component.ts
import { Component, OnInit } from '@angular/core';
import { LoadingService } from '../loading.service';
@Component({
selector: 'app-spinner-sample',
templateUrl: './spinner-sample.component.html',
styleUrls: ['./spinner-sample.component.css']
})
export class SpinnerSampleComponent implements OnInit {
constructor(private loadingService: LoadingService) { }
ngOnInit(): void {
}
button_click(){
this.showLoading("loading");
setTimeout(() => {
this.hideLoading();
}, 2000);
}
showLoading(strMessage: string):void {
this.loadingService.setLoading(strMessage);
}
hideLoading():void {
this.loadingService.unsetLoading();
}
}
spinner-sample.component.html
spinner-sample.component.html
<p>spinner-sample works!</p>
<button mat-stroked-button (click)="button_click()">Spinner!!!</button>
表示確認
ng serve --open
