Angular Material 7 - 进度条

<mat-progress-bar> 是一个 Angular 指令，用于显示具有材质样式的进度条。

在本章中，我们将展示使用 Angular Material 绘制确定性和不确定性进度条所需的配置。

创建 Angular 应用程序

按照以下步骤更新我们在Angular 6 - 项目设置章节中创建的 Angular 应用程序 −

步骤	说明
1	创建一个名为 materialApp 的项目，如Angular 6 - 项目设置章节中所述。
2	修改 app.module.ts, app.component.ts, app.component.css 和 app.component.html，如下所述。保持其余文件不变。
3	编译并运行应用程序以验证实现逻辑的结果。

以下是修改后的模块描述符app.module.ts的内容。

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import {BrowserAnimationsModule} from '@angular/platform-browser/animations';
import {MatProgressBarModule, MatRadioModule, MatSliderModule} from '@angular/material'
import {FormsModule, ReactiveFormsModule} from '@angular/forms';
@NgModule({
   declarations: [
      AppComponent
   ],
   imports: [
      BrowserModule,
      BrowserAnimationsModule,
      MatProgressBarModule, MatRadioModule, MatSliderModule,
      FormsModule,
      ReactiveFormsModule
   ],
   providers: [],
   bootstrap: [AppComponent]
})
export class AppModule { }

以下是修改后的ts文件app.component.css的内容。

.tp-section {
   display: flex;
   align-content: center;
   align-items: center;
   height: 60px;
}
.tp-margin {
   margin: 0 10px;
}

以下是修改后的HTML主机文件app.component.html的内容。

<section class = "tp-section">
   <label class = "tp-margin">Color:</label>
   <mat-radio-group [(ngModel)] = "color">
      <mat-radio-button class = "tp-margin" value = "primary">
         Primary
      </mat-radio-button>
      <mat-radio-button class = "tp-margin" value = "accent">
         Accent
      </mat-radio-button>
      <mat-radio-button class = "tp-margin" value = "warn">
         Warn
      </mat-radio-button>
   </mat-radio-group>
</section>
<section class = "tp-section">
   <label class = "tp-margin">Mode:</label>
   <mat-radio-group [(ngModel)] = "mode">
      <mat-radio-button class = "tp-margin" value = "determinate">
         Determinate
      </mat-radio-button>
      <mat-radio-button class = "tp-margin" value = "indeterminate">
         Indeterminate
      </mat-radio-button>
      <mat-radio-button class = "tp-margin" value = "buffer">
         Buffer
      </mat-radio-button>
      <mat-radio-button class = "tp-margin" value = "query">
         Query
      </mat-radio-button>
   </mat-radio-group>
</section>
<section class = "tp-section" *ngIf = "mode === 'determinate' || mode === 'buffer'">
   <label class = "tp-margin">Progress:</label>
   <mat-slider class = "tp-margin" [(ngModel)] = "value"></mat-slider>
</section>
<section class = "tp-section" *ngIf = "mode === 'buffer'">
   <label class = "tp-margin">Buffer:</label>
   <mat-slider class = "tp-margin" [(ngModel)] = "bufferValue"></mat-slider>
</section>
<section class = "tp-section">
   <label class = "tp-margin">Mode: {{mode}}</label>
   <mat-progress-bar
      class = "tp-margin"
      [color] = "color"
      [mode] = "mode"
      [value] = "value"
      [bufferValue] = "bufferValue"
      >
   </mat-progress-bar>
</section>

以下是修改后的ts文件app.component.ts的内容。

import { Component } from '@angular/core';
@Component({
   selector: 'app-root',
   templateUrl: './app.component.html',
   styleUrls: ['./app.component.css']
})
export class AppComponent {
   title = 'materialApp'; 
   color = 'primary';
   mode = 'determinate';
   value = 50;
   bufferValue = 75;
}