Angular ContextMenu - Keyboard Support
An end user can use the following keys to interact with the UI component.
Key | Action |
---|---|
← | Closes the submenu and focuses on its parent item. |
→ | Opens the submenu of the focused item. |
Home | Sets focus to the first item in the menu/submenu. |
End | Sets focus to the last item in the menu/submenu. |
Space | Switches the focused item to the selected state. |
Enter | Chooses the focused item. |
You can implement a custom handler for a key using the registerKeyHandler(key, handler) method.
jQuery
JavaScript
function registerKeyHandlers () { const contextMenu = $("#contextMenuContainer").dxContextMenu("instance"); contextMenu.registerKeyHandler("backspace", function(e) { // The argument "e" contains information on the event }); contextMenu.registerKeyHandler("space", function(e) { // ... }); }
Angular
TypeScript
import { ..., ViewChild, AfterViewInit } from '@angular/core'; import { DxContextMenuModule, DxContextMenuComponent } from 'devextreme-angular'; // ... export class AppComponent implements AfterViewInit { @ViewChild(DxContextMenuComponent, { static: false }) contextMenu: DxContextMenuComponent; // Prior to Angular 8 // @ViewChild(DxContextMenuComponent) contextMenu: DxContextMenuComponent; ngAfterViewInit () { this.contextMenu.instance.registerKeyHandler('backspace', function(e) { // The argument "e" contains information on the event }); this.contextMenu.instance.registerKeyHandler('space', function(e) { // ... }); } } @NgModule({ imports: [ // ... DxContextMenuModule ], // ... })
Vue
<template> <DxContextMenu :ref="myContextMenuRef" /> </template> <script> import 'devextreme/dist/css/dx.light.css'; import DxContextMenu from 'devextreme-vue/context-menu'; const myContextMenuRef = 'my-context-menu'; export default { components: { DxContextMenu }, data() { return { myContextMenuRef } }, computed: { contextMenu: function() { return this.$refs[myContextMenuRef].instance; } }, mounted: function() { this.contextMenu.registerKeyHandler('backspace', function(e) { // The argument "e" contains information on the event }); this.contextMenu.registerKeyHandler('space', function(e) { // ... }); } } </script>
React
App.js
import React from 'react'; import 'devextreme/dist/css/dx.light.css'; import { ContextMenu } from 'devextreme-react/context-menu'; class App extends React.Component { constructor(props) { super(props); this.contextMenuRef = React.createRef(); } render() { return ( <ContextMenu ref={this.contextMenuRef} /> ); } get contextMenu() { return this.contextMenuRef.current.instance; } componentDidMount() { this.contextMenu.registerKeyHandler('backspace', function(e) { // The argument "e" contains information on the event }); this.contextMenu.registerKeyHandler('space', function(e) { // ... }); } } export default App;
See Also
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