更改默认扩展面板箭头的箭头样式 [英] Change arrow style for default expansion panel arrow

问题描述

我有一个如下所示的角度扩展面板.

I have an angular expansion panel as shown below.

但我想把箭头的设计改成这样:

But I want to change the the design of the arrow to something like this:

未展开:

扩展:

怎么样?或者我可以在角材料中这样做吗?代码如下:

How? or is it possible for me to do so in angular material? Code below:

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 {}

推荐答案

是的，这是可能的.为您的扩展面板提供一个参考 ID，例如example 并将 hideToggle 属性设置为 true.

Yes it is possible. Give your expansion panel a reference id e.g. example and set the hideToggle property as true.

在中，您可以放置​​图标并使用面板的expanded属性来显示或隐藏相关图标.

In the <md-panel-description>, you can place your icons and use the expanded property of the panel to show or hide the relevant icons.

  <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留出空间，请在您的 component.css 中添加以下类:

To provide space between the icon and panel description, add the following classes in your component.css:

.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;
}

我使用了材质图标.如果需要，您可以放置​​自定义图标.这是stackblitz演示<的链接/strong>.

I have used material icons. You can place your custom icons if you want. Here is a link to stackblitz demo.

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