151 lines
3.8 KiB
JavaScript
151 lines
3.8 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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* @flow
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* @providesModule ListViewGridLayoutExample
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*/
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'use strict';
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var React = require('react');
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var createReactClass = require('create-react-class');
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var ReactNative = require('react-native');
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var {
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Image,
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ListView,
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TouchableHighlight,
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StyleSheet,
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Text,
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View,
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} = ReactNative;
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var THUMB_URLS = [
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require('./Thumbnails/like.png'),
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require('./Thumbnails/dislike.png'),
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require('./Thumbnails/call.png'),
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require('./Thumbnails/fist.png'),
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require('./Thumbnails/bandaged.png'),
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require('./Thumbnails/flowers.png'),
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require('./Thumbnails/heart.png'),
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require('./Thumbnails/liking.png'),
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require('./Thumbnails/party.png'),
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require('./Thumbnails/poke.png'),
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require('./Thumbnails/superlike.png'),
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require('./Thumbnails/victory.png'),
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];
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var ListViewGridLayoutExample = createReactClass({
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displayName: 'ListViewGridLayoutExample',
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statics: {
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title: '<ListView> - Grid Layout',
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description: 'Flexbox grid layout.'
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},
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getInitialState: function() {
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var ds = new ListView.DataSource({rowHasChanged: (r1, r2) => r1 !== r2});
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return {
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dataSource: ds.cloneWithRows(this._genRows({})),
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};
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},
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_pressData: ({}: {[key: number]: boolean}),
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componentWillMount: function() {
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this._pressData = {};
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},
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render: function() {
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return (
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// ListView wraps ScrollView and so takes on its properties.
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// With that in mind you can use the ScrollView's contentContainerStyle prop to style the items.
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<ListView
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contentContainerStyle={styles.list}
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dataSource={this.state.dataSource}
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initialListSize={21}
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pageSize={3} // should be a multiple of the no. of visible cells per row
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scrollRenderAheadDistance={500}
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renderRow={this._renderRow}
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/>
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);
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},
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_renderRow: function(rowData: string, sectionID: number, rowID: number) {
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var rowHash = Math.abs(hashCode(rowData));
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var imgSource = THUMB_URLS[rowHash % THUMB_URLS.length];
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return (
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<TouchableHighlight onPress={() => this._pressRow(rowID)} underlayColor="transparent">
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<View>
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<View style={styles.row}>
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<Image style={styles.thumb} source={imgSource} />
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<Text style={styles.text}>
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{rowData}
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</Text>
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</View>
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</View>
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</TouchableHighlight>
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);
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},
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_genRows: function(pressData: {[key: number]: boolean}): Array<string> {
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var dataBlob = [];
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for (var ii = 0; ii < 100; ii++) {
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var pressedText = pressData[ii] ? ' (X)' : '';
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dataBlob.push('Cell ' + ii + pressedText);
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}
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return dataBlob;
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},
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_pressRow: function(rowID: number) {
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this._pressData[rowID] = !this._pressData[rowID];
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this.setState({dataSource: this.state.dataSource.cloneWithRows(
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this._genRows(this._pressData)
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)});
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},
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});
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/* eslint no-bitwise: 0 */
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var hashCode = function(str) {
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var hash = 15;
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for (var ii = str.length - 1; ii >= 0; ii--) {
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hash = ((hash << 5) - hash) + str.charCodeAt(ii);
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}
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return hash;
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};
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var styles = StyleSheet.create({
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list: {
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justifyContent: 'space-around',
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flexDirection: 'row',
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flexWrap: 'wrap',
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alignItems: 'flex-start'
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},
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row: {
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justifyContent: 'center',
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padding: 5,
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margin: 3,
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width: 100,
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height: 100,
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backgroundColor: '#F6F6F6',
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alignItems: 'center',
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borderWidth: 1,
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borderRadius: 5,
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borderColor: '#CCC'
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},
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thumb: {
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width: 64,
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height: 64
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},
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text: {
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flex: 1,
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marginTop: 5,
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fontWeight: 'bold'
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},
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});
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module.exports = ListViewGridLayoutExample;
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