更改默认扩展面板箭头的箭头样式

Question

我有一个角度扩展面板,如下所示.

但我想将箭头的设计改为这样的:

没有扩大:

扩展:

怎么样？或者我可以用棱角分明的材料吗？代码如下:

HTML:

<md-expansion-panel>
  <md-expansion-panel-header>
    <md-panel-title>
      Personal data
    </md-panel-title>
    <md-panel-description>
      Type your name and age
    </md-panel-description>
  </md-expansion-panel-header>

  <md-form-field>
    <input mdInput placeholder="First name">
  </md-form-field>

  <md-form-field>
    <input mdInput placeholder="Age">
  </md-form-field>
</md-expansion-panel>

TS:

import {Component} from '@angular/core';

/**
 * @title Basic expansion panel
 */
@Component({
  selector: 'expansion-overview-example',
  templateUrl: 'expansion-overview-example.html',
})
export class ExpansionOverviewExample {}

Answer 1

对的,这是可能的.为您的扩展面板提供参考ID,例如example将hideToggle属性设置为true.

在中<md-panel-description>,您可以放置​​图标并使用expanded面板的属性来显示或隐藏相关图标.

  <md-expansion-panel  class="custom-header" hideToggle="true" #example>
    <md-expansion-panel-header>
      <md-panel-title>
        Personal data
      </md-panel-title>
      <md-panel-description>
        Type your name and age
        <md-icon *ngIf="!example.expanded">play_arrow</md-icon>
        <md-icon *ngIf="example.expanded">arrow_drop_down</md-icon>
      </md-panel-description>
    </md-expansion-panel-header>

    <md-form-field>
      <input mdInput placeholder="First name">
    </md-form-field>

    <md-form-field>
      <input mdInput placeholder="Age">
    </md-form-field>
  </md-expansion-panel>

要在图标和面板描述之间提供空间,请在component.css中添加以下类:

.custom-header .mat-expansion-panel-header-title, 
.custom-header .mat-expansion-panel-header-description {
  flex-basis: 0;
}

.custom-header .mat-expansion-panel-header-description {
  justify-content: space-between;
  align-items: center;
}

我用过材料图标.您可以根据需要放置自定义图标.这是stackblitz演示的链接.

Answer 2

扩展了@Faisal 的答案，根据最新版本的角度材料，我们将使用mat前缀而不是md材料组件。

角材料 8.1.4

<mat-expansion-panel class="mb-15px" hideToggle="true" #xyz>
<mat-expansion-panel-header>
  <mat-panel-title class="font-weight-bold font-small">
    Info
  </mat-panel-title>
  <mat-panel-description>
    <mat-icon *ngIf="!xyz.expanded">play_arrow</mat-icon>
    <mat-icon *ngIf="xyz.expanded">arrow_drop_down</mat-icon>
  </mat-panel-description>
</mat-expansion-panel-header>
<mat-expansion-panel class="mb-15px" hideToggle="true" #xyz>

Stackblitz 演示