60 lines
1.3 KiB
JavaScript
60 lines
1.3 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @providesModule DimensionsExample
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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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Dimensions,
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Text,
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View
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} = ReactNative;
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class DimensionsSubscription extends React.Component<{dim: string}, {dims: Object}> {
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state = {
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dims: Dimensions.get(this.props.dim),
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};
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componentDidMount() {
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Dimensions.addEventListener('change', this._handleDimensionsChange);
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}
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componentWillUnmount() {
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Dimensions.removeEventListener('change', this._handleDimensionsChange);
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}
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_handleDimensionsChange = (dimensions) => {
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this.setState({
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dims: dimensions[this.props.dim],
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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.dims)}</Text>
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</View>
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);
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}
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}
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exports.title = 'Dimensions';
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exports.description = 'Dimensions of the viewport';
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exports.examples = [
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{
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title: 'window',
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render(): React.Element<any> { return <DimensionsSubscription dim="window" />; }
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},
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{
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title: 'screen',
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render(): React.Element<any> { return <DimensionsSubscription dim="screen" />; }
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},
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];
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