react-native/RNTester/js/ProgressViewIOSExample.js

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @format
 * @flow
 */

'use strict';

var React = require('react');
var createReactClass = require('create-react-class');
var ReactNative = require('react-native');
var {ProgressViewIOS, StyleSheet, View} = ReactNative;
/* $FlowFixMe(>=0.54.0 site=react_native_oss) This comment suppresses an error
 * found when Flow v0.54 was deployed. To see the error delete this comment and
 * run Flow. */
var TimerMixin = require('react-timer-mixin');

var ProgressViewExample = createReactClass({
  displayName: 'ProgressViewExample',
  mixins: [TimerMixin],

  getInitialState() {
    return {
      progress: 0,
    };
  },

  componentDidMount() {
    this.updateProgress();
  },

  updateProgress() {
    var progress = this.state.progress + 0.01;
    this.setState({progress});
    this.requestAnimationFrame(() => this.updateProgress());
  },

  getProgress(offset) {
    var progress = this.state.progress + offset;
    return Math.sin(progress % Math.PI) % 1;
  },

  render() {
    return (
      <View style={styles.container}>
        <ProgressViewIOS
          style={styles.progressView}
          progress={this.getProgress(0)}
        />
        <ProgressViewIOS
          style={styles.progressView}
          progressTintColor="purple"
          progress={this.getProgress(0.2)}
        />
        <ProgressViewIOS
          style={styles.progressView}
          progressTintColor="red"
          progress={this.getProgress(0.4)}
        />
        <ProgressViewIOS
          style={styles.progressView}
          progressTintColor="orange"
          progress={this.getProgress(0.6)}
        />
        <ProgressViewIOS
          style={styles.progressView}
          progressTintColor="yellow"
          progress={this.getProgress(0.8)}
        />
      </View>
    );
  },
});

exports.displayName = (undefined: ?string);
exports.framework = 'React';
exports.title = 'ProgressViewIOS';
exports.description = 'ProgressViewIOS';
exports.examples = [
  {
    title: 'ProgressViewIOS',
    render() {
      return <ProgressViewExample />;
    },
  },
];

var styles = StyleSheet.create({
  container: {
    marginTop: -20,
    backgroundColor: 'transparent',
  },
  progressView: {
    marginTop: 20,
  },
});