react-native/Examples/UIExplorer/TabBarExample.js

/**
 * Copyright (c) 2015-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * @flow
 */
'use strict';

var React = require('React');
var TabBarIOS = require('TabBarIOS');
var TabBarItemIOS = require('TabBarItemIOS');
var StyleSheet = require('StyleSheet');
var Text = require('Text');
var View = require('View');


var TabBarExample = React.createClass({

  statics: {
    title: '<TabBarIOS>',
    description: 'Tab-based navigation.'
  },

  getInitialState: function() {
    return {
      selectedTab: 'redTab',
      notifCount: 0,
      presses: 0,
    };
  },

  _renderContent: function(color: string, pageText: string) {
    return (
      <View style={[styles.tabContent, {backgroundColor: color}]}>
        <Text style={styles.tabText}>{pageText}</Text>
        <Text style={styles.tabText}>{this.state.presses} re-renders of this tab</Text>
      </View>
    );
  },

  render: function() {
    return (
      <TabBarIOS
        selectedTab={this.state.selectedTab}>
        <TabBarItemIOS
          name="blueTab"
          icon={_ix_DEPRECATED('favorites')}
          accessibilityLabel="Blue Tab"
          selected={this.state.selectedTab === 'blueTab'}
          onPress={() => {
            this.setState({
              selectedTab: 'blueTab',
            });
          }}>
          {this._renderContent('#414A8C', 'Blue Tab')}
        </TabBarItemIOS>
        <TabBarItemIOS
          accessibilityLabel="Red Tab"
          name="redTab"
          icon={_ix_DEPRECATED('history')}
          badgeValue={this.state.notifCount ? String(this.state.notifCount) : null}
          selected={this.state.selectedTab === 'redTab'}
          onPress={() => {
            this.setState({
              selectedTab: 'redTab',
              notifCount: this.state.notifCount + 1,
            });
          }}>
          {this._renderContent('#783E33', 'Red Tab')}
        </TabBarItemIOS>
        <TabBarItemIOS
          name="greenTab"
          icon={_ix_DEPRECATED('more')}
          accessibilityLabel="Green Tab"
          selected={this.state.selectedTab === 'greenTab'}
          onPress={() => {
            this.setState({
              selectedTab: 'greenTab',
              presses: this.state.presses + 1
            });
          }}>
          {this._renderContent('#21551C', 'Green Tab')}
        </TabBarItemIOS>
      </TabBarIOS>
    );
  },

});

var styles = StyleSheet.create({
  tabContent: {
    flex: 1,
    alignItems: 'center',
  },
  tabText: {
    color: 'white',
    margin: 50,
  },
});

// This is needed because the actual image may not exist as a file and
// is used by the native code to load a system image.
// TODO(nicklockwood): How can this fit our require system?
function _ix_DEPRECATED(imageUri) {
  return {
    uri: imageUri,
    isStatic: true,
  };
}

module.exports = TabBarExample;