在角材料中切换主题5

我一直在阅读一些关于此的文章,但它们似乎在几种不同的方式上存在冲突.我希望重新创建与最新版角度材料[5.0.0-rc0] 的角度材料文档站点相同的主题切换

我有两个自定义主题,这是custom-theme.scss,并且有light-custom-theme.scss几乎相同,没有mat-dark-theme

@import '~@angular/material/theming';
$custom-theme-primary: mat-palette($mat-blue);
$custom-theme-accent: mat-palette($mat-orange, A200, A100, A400);
$custom-theme-warn: mat-palette($mat-red);
$custom-theme: mat-dark-theme($custom-theme-primary, $custom-theme-accent, $custom-theme-warn);

@include angular-material-theme($custom-theme);

我的styles.scss看起来像这样

@import '~@angular/material/theming';
@include mat-core();
@import 'custom-theme.scss';
@import 'light-custom-theme.scss';
.custom-theme {
  @include angular-material-theme($custom-theme);
}

.light-custom-theme {
  @include angular-material-theme($light-custom-theme);
}

然后在index.html中调用它

当我做一个主题时,一切正常.但我试图在两者之间切换.将两个主题添加到angular-cli.json中,light-custom-theme接管

"styles": [
  "styles.scss",
  "custom-theme.scss",
  "light-custom-theme.scss"
],

我在我的一个组件中有以下代码来处理切换主题

toggleTheme(): void {
  if (this.overlay.classList.contains("custom-theme")) {
    this.overlay.classList.remove("custom-theme");
    this.overlay.classList.add("light-custom-theme");
  } else if (this.overlay.classList.contains("light-custom-theme")) {
    this.overlay.classList.remove("light-custom-theme");
    this.overlay.classList.add("custom-theme");
  } else {
    this.overlay.classList.add("light-custom-theme");
  }
}

但无论何时运行,主题都保持不变.对于它的价值,在overlay.classList中的位置0处已经存在"cdk-overlay-container"对象

0:"cdk-overlay-container"
1:"custom-theme"
length:2
value:"cdk-overlay-container custom-theme" 

我不确定如何调试这个,因为角度材料文档没有给我太多的工作,任何帮助将是赞赏!

谢谢!

这是Angular 5.1 +/Angular Material 5.0+的替代解决方案.

*编辑:如上所述,这仍然适用于Angular 7+.

工作可编辑的示例 - https://stackblitz.com/edit/dynamic-material-theming

在theme.scss中,包含一个默认主题(注意它不是保存在类名下 - 这是Angular将它用作默认值),然后是一个明暗主题.

theme.scss

@import '~@angular/material/theming';
@include mat-core();

// Typography
$custom-typography: mat-typography-config(
  $font-family: Raleway,
  $headline: mat-typography-level(24px, 48px, 400),
  $body-1: mat-typography-level(16px, 24px, 400)
);
@include angular-material-typography($custom-typography);

// Default colors
$my-app-primary: mat-palette($mat-teal, 700, 100, 800);
$my-app-accent:  mat-palette($mat-teal, 700, 100, 800);

$my-app-theme: mat-light-theme($my-app-primary, $my-app-accent);
@include angular-material-theme($my-app-theme);

// Dark theme
$dark-primary: mat-palette($mat-blue-grey);
$dark-accent:  mat-palette($mat-amber, A200, A100, A400);
$dark-warn:    mat-palette($mat-deep-orange);

$dark-theme:   mat-dark-theme($dark-primary, $dark-accent, $dark-warn);

.dark-theme {
  @include angular-material-theme($dark-theme);
}

// Light theme
$light-primary: mat-palette($mat-grey, 200, 500, 300);
$light-accent: mat-palette($mat-brown, 200);
$light-warn: mat-palette($mat-deep-orange, 200);

$light-theme: mat-light-theme($light-primary, $light-accent, $light-warn);

.light-theme {
  @include angular-material-theme($light-theme)
}

在app.component文件中,包含来自@ angular/cdk/overlay的OverlayContainer.你可以在这里找到Angular的文档https://material.angular.io/guide/theming ; 虽然他们的实施有点不同.请注意,我还必须在App.module中包含OverlayModule作为导入.

在我的app.component文件中,我还声明@HostBinding('class') componentCssClass;为一个变量,它将用于将主题设置为一个类.

app.component.ts

import {Component, HostBinding } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { OverlayContainer} from '@angular/cdk/overlay';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css'],
})
export class AppComponent {

  constructor(public overlayContainer: OverlayContainer) {}

  @HostBinding('class') componentCssClass;

  onSetTheme(theme) {
    this.overlayContainer.getContainerElement().classList.add(theme);
    this.compOnentCssClass= theme;
  }

}

app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import { HttpClientModule } from '@angular/common/http';

import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { MatCardModule } from '@angular/material/card';
import { MatButtonModule } from '@angular/material/button';

import { AppComponent } from './app.component';

import { OverlayModule} from '@angular/cdk/overlay';

@NgModule({
  declarations: [
    AppComponent,
  ],
  imports: [
    BrowserModule,
    HttpClientModule,
    BrowserAnimationsModule,
    MatCardModule,
    MatButtonModule,
    OverlayModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule {}

最后,从您的视图中调用onSetTheme函数.

app.component.html

Default
Dark
Light

您可以考虑使用observable,以便功能更加动态.

你必须使用的getContainerElement方法OverlayContainer.以下是一些示例用法:

this.overlay.getContainerElement().classList.add('my-theme');

@include angular-material-theme($custom-theme); // Remove this line from custom-theme.scss and light-custom-theme.scss

toggleTheme(): void {
  if (this.overlay.classList.contains("custom-theme")) {
    this.overlay.classList.remove("custom-theme");
    this.overlay.classList.add("light-custom-theme");
  } else if (this.overlay.classList.contains("light-custom-theme")) {
    this.overlay.getContainerElement().classList.remove("light-custom-theme");
    this.overlay.classList.add("custom-theme");
  } else {
    this.overlay.classList.add("light-custom-theme");
  }
  if (document.body.classList.contains("custom-theme")) {
    document.body.classList.remove("custom-theme");
    document.body.classList.add("light-custom-theme");
  } else if (document.body.classList.contains("light-custom-theme")) {
    document.body.classList.remove("light-custom-theme");
    document.body.classList.add("custom-theme");
  } else {
    this.overlay.classList.add("light-custom-theme");
  }
}