界面控件DevExtreme使用指南 - 控制折叠操作 & 键盘支持

DevExtreme拥有高性能的HTML5 / JavaScript小部件集合，使您可以利用现代Web开发堆栈（包括React，Angular，ASP.NET Core，jQuery，Knockout等）构建交互式的Web应用程序，该套件附带功能齐全的数据网格、交互式图表小部件、数据编辑器等。

请注意：在开始本教程之前，请确保DevExtreme已安装在Angular、Vue、React或jQuery应用程序中。

DevExtreme v22.2正式版下载

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控制操作

默认情况下，同一时刻只能有一个面板处于展开状态，要改变这一点，将collapsible 和 multiple属性切换为true。

jQuery

JavaScript

$(function () {
$("#accordionContainer").dxAccordion({
// ...
// All panels may be collapsed
collapsible: true,
// Multiple panels may be expanded
multiple: true
});
});

Angular

HTML

<dx-accordion
[collapsible]="true" <!-- All panels may be collapsed -->
[multiple]="true"> <!-- Multiple panels may be expanded -->
</dx-accordion>

TypeScpipt

import { DxAccordionModule } from "devextreme-angular";
// ...
export class AppComponent {
// ...
}
@NgModule({
imports: [
// ...
DxAccordionModule
],
// ...
})

Vue

App.vue

<template>
<DxAccordion
:collapsible="true" <!-- All panels may be collapsed -->
:multiple="true"> <!-- Multiple panels may be expanded -->
</DxAccordion>
</template>
<script>
import 'devextreme/dist/css/dx.light.css';

import DxAccordion from "devextreme-vue/accordion";

export default {
components: {
DxAccordion
}
};
</script>

React

App.js

import React from 'react';
import 'devextreme/dist/css/dx.light.css';

import { Accordion } from 'devextreme-react/accordion';

class App extends React.Component {
render() {
return (
<Accordion
collapsible={true} {/* All panels may be collapsed */}
multiple={true}> {/* Multiple panels may be expanded */}
</Accordion>
);
}
}

export default App;

键盘支持

最终用户可以使用以下键与UI组件进行交互。

您可以使用registerKeyHandler(key, handler)方法实现键的自定义处理程序。

jQuery

JavaScript

function registerKeyHandlers () {
const accordion = $("#accordionContainer").dxAccordion("instance");
accordion.registerKeyHandler("backspace", function(e) {
// The argument "e" contains information on the event
});
accordion.registerKeyHandler("space", function(e) {
// ...
});
}

Angular

TypeScpipt

import { ..., ViewChild, AfterViewInit } from '@angular/core';
import { DxAccordionModule, DxAccordionComponent } from 'devextreme-angular';
// ...
export class AppComponent implements AfterViewInit {
@ViewChild(DxAccordionComponent, { static: false }) accordion: DxAccordionComponent;
// Prior to Angular 8
// @ViewChild(DxAccordionComponent) accordion: DxAccordionComponent;

ngAfterViewInit () {
this.accordion.instance.registerKeyHandler('backspace', function(e) {
// The argument "e" contains information on the event
});
this.accordion.instance.registerKeyHandler('space', function(e) {
// ...
});
}
}
@NgModule({
imports: [
// ...
DxAccordionModule
],
// ...
})

Vue

<template>
<DxAccordion :ref="myAccordionRef" />
</template>
<script>
import 'devextreme/dist/css/dx.light.css';

import DxAccordion from 'devextreme-vue/accordion';

const myAccordionRef = 'my-accordion';

export default {
components: {
DxAccordion
},
data() {
return {
myAccordionRef
}
},
computed: {
accordion: function() {
return this.$refs[myAccordionRef].instance;
}
},
mounted: function() {
this.accordion.registerKeyHandler('backspace', function(e) {
// The argument "e" contains information on the event
});
this.accordion.registerKeyHandler('space', function(e) {
// ...
});
}
}
</script>

React

App.js

import React from 'react';
import 'devextreme/dist/css/dx.light.css';

import { Accordion } from 'devextreme-react/accordion';

class App extends React.Component {
constructor(props) {
super(props);

this.accordionRef = React.createRef();
}

render() {
return (
<Accordion ref={this.accordionRef} />
);
}

get accordion() {
return this.accordionRef.current.instance;
}

componentDidMount() {
this.accordion.registerKeyHandler('backspace', function(e) {
// The argument "e" contains information on the event
});
this.accordion.registerKeyHandler('space', function(e) {
// ...
});
}
}

export default App;

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