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stateChanged event emitted from KeyboardNavigation

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This commit is contained in:
nklhrstv 2020-05-15 15:03:16 +03:00
parent 29609b8fdb
commit a6db997391
1 changed files with 21 additions and 13 deletions
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34
src/services/KeyboardNavigation/KeyboardNavigation.js
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@ -1,8 +1,13 @@
// Copyright (C) 2017-2020 Smart code 203358507
const EventEmitter = require('events');
function KeyboardNavigation() {
let active = false;
const events = new EventEmitter();
events.on('error', () => { });
function onKeyDown(event) {
if (event.keyboardNavigationPrevented || event.target.tagName === 'INPUT') {
return;
@ -61,17 +66,8 @@ function KeyboardNavigation() {
}
}
}
function start() {
if (active) {
return;
}
window.addEventListener('keydown', onKeyDown);
active = true;
}
function stop() {
window.removeEventListener('keydown', onKeyDown);
active = false;
function onStateChanged() {
events.emit('stateChanged');
}
Object.defineProperties(this, {
@ -84,8 +80,20 @@ function KeyboardNavigation() {
}
});
this.start = start;
this.stop = stop;
this.start = function() {
if (active) {
return;
}
window.addEventListener('keydown', onKeyDown);
active = true;
onStateChanged();
};
this.stop = function() {
window.removeEventListener('keydown', onKeyDown);
active = false;
onStateChanged();
};
}
module.exports = KeyboardNavigation;