69 lines
1.6 KiB
JavaScript
69 lines
1.6 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule OrientationChangeExample
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* @flow
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*/
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'use strict';
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const React = require('react');
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const ReactNative = require('react-native');
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const {
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DeviceEventEmitter,
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Text,
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View,
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} = ReactNative;
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import type EmitterSubscription from 'EmitterSubscription';
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class OrientationChangeExample extends React.Component {
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_orientationSubscription: EmitterSubscription;
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state = {
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currentOrientation: '',
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orientationDegrees: 0,
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isLandscape: false,
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};
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componentDidMount() {
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this._orientationSubscription = DeviceEventEmitter.addListener(
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'namedOrientationDidChange', this._onOrientationChange,
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);
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}
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componentWillUnmount() {
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this._orientationSubscription.remove();
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}
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_onOrientationChange = (orientation: Object) => {
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this.setState({
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currentOrientation: orientation.name,
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orientationDegrees: orientation.rotationDegrees,
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isLandscape: orientation.isLandscape,
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});
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}
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render() {
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return (
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<View>
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<Text>{JSON.stringify(this.state)}</Text>
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</View>
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);
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}
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}
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exports.title = 'OrientationChangeExample';
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exports.description = 'listening to orientation changes';
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exports.examples = [
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{
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title: 'OrientationChangeExample',
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description: 'listening to device orientation changes',
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render() { return <OrientationChangeExample />; },
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},
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];
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