<commit_before>/**
 * 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.
 *
 * @providesModule TouchableOpacity
 * @noflow
 */
'use strict';

// Note (avik): add @flow when Flow supports spread properties in propTypes

var Animated = require('Animated');
var Easing = require('Easing');
var NativeMethodsMixin = require('NativeMethodsMixin');
var React = require('React');
var PropTypes = require('prop-types');
var TimerMixin = require('react-timer-mixin');
var Touchable = require('Touchable');
var TouchableWithoutFeedback = require('TouchableWithoutFeedback');

var createReactClass = require('create-react-class');
var ensurePositiveDelayProps = require('ensurePositiveDelayProps');
var flattenStyle = require('flattenStyle');

type Event = Object;

var PRESS_RETENTION_OFFSET = {top: 20, left: 20, right: 20, bottom: 30};

/**
 * A wrapper for making views respond properly to touches.
 * On press down, the opacity of the wrapped view is decreased, dimming it.
 *
 * Opacity is controlled by wrapping the children in an Animated.View, which is
 * added to the view hiearchy.  Be aware that this can affect layout.
 *
 * Example:
 *
 * ```
 * renderButton: function() {
 *   return (
 *     <TouchableOpacity onPress={this._onPressButton}>
 *       <Image
 *         style={styles.button}
 *         source={require('./myButton.png')}
 *       />
 *     </TouchableOpacity>
 *   );
 * },
 * ```
 */
var TouchableOpacity = createReactClass({
  displayName: 'TouchableOpacity',
  mixins: [TimerMixin, Touchable.Mixin, NativeMethodsMixin],

  propTypes: {
    ...TouchableWithoutFeedback.propTypes,
    /**
     * Determines what the opacity of the wrapped view should be when touch is
     * active. Defaults to 0.2.
     */
    activeOpacity: PropTypes.number,
    /**
     * Apple TV parallax effects
     */
    tvParallaxProperties: PropTypes.object,
  },

  getDefaultProps: function() {
    return {
      activeOpacity: 0.2,
    };
  },

  getInitialState: function() {
    return {
      ...this.touchableGetInitialState(),
      anim: new Animated.Value(this._getChildStyleOpacityWithDefault()),
    };
  },

  componentDidMount: function() {
    ensurePositiveDelayProps(this.props);
  },

  componentWillReceiveProps: function(nextProps) {
    ensurePositiveDelayProps(nextProps);
  },

  /**
   * Animate the touchable to a new opacity.
   */
  setOpacityTo: function(value: number, duration: number) {
    Animated.timing(
      this.state.anim,
      {
        toValue: value,
        duration: duration,
        easing: Easing.inOut(Easing.quad),
        useNativeDriver: true,
      }
    ).start();
  },

  /**
   * `Touchable.Mixin` self callbacks. The mixin will invoke these if they are
   * defined on your component.
   */
  touchableHandleActivePressIn: function(e: Event) {
    if (e.dispatchConfig.registrationName === 'onResponderGrant') {
      this._opacityActive(0);
    } else {
      this._opacityActive(150);
    }
    this.props.onPressIn && this.props.onPressIn(e);
  },

  touchableHandleActivePressOut: function(e: Event) {
    this._opacityInactive(250);
    this.props.onPressOut && this.props.onPressOut(e);
  },

  touchableHandlePress: function(e: Event) {
    this.props.onPress && this.props.onPress(e);
  },

  touchableHandleLongPress: function(e: Event) {
    this.props.onLongPress && this.props.onLongPress(e);
  },

  touchableGetPressRectOffset: function() {
    return this.props.pressRetentionOffset || PRESS_RETENTION_OFFSET;
  },

  touchableGetHitSlop: function() {
    return this.props.hitSlop;
  },

  touchableGetHighlightDelayMS: function() {
    return this.props.delayPressIn || 0;
  },

  touchableGetLongPressDelayMS: function() {
    return this.props.delayLongPress === 0 ? 0 :
      this.props.delayLongPress || 500;
  },

  touchableGetPressOutDelayMS: function() {
    return this.props.delayPressOut;
  },

  _opacityActive: function(duration: number) {
    this.setOpacityTo(this.props.activeOpacity, duration);
  },

  _opacityInactive: function(duration: number) {
    this.setOpacityTo(
      this._getChildStyleOpacityWithDefault(),
      duration
    );
  },

  _getChildStyleOpacityWithDefault: function() {
   var childStyle = flattenStyle(this.props.style) || {};
   return childStyle.opacity == undefined ? 1 : childStyle.opacity;
 },

  render: function() {
    return (
      <Animated.View
        accessible={this.props.accessible !== false}
        accessibilityLabel={this.props.accessibilityLabel}
        accessibilityComponentType={this.props.accessibilityComponentType}
        accessibilityTraits={this.props.accessibilityTraits}
        style={[this.props.style, {opacity: this.state.anim}]}
        nativeID={this.props.nativeID}
        testID={this.props.testID}
        onLayout={this.props.onLayout}
        isTVSelectable={true}
        tvParallaxProperties={this.props.tvParallaxProperties}
        hitSlop={this.props.hitSlop}
        onStartShouldSetResponder={this.touchableHandleStartShouldSetResponder}
        onResponderTerminationRequest={this.touchableHandleResponderTerminationRequest}
        onResponderGrant={this.touchableHandleResponderGrant}
        onResponderMove={this.touchableHandleResponderMove}
        onResponderRelease={this.touchableHandleResponderRelease}
        onResponderTerminate={this.touchableHandleResponderTerminate}>
        {this.props.children}
        {Touchable.renderDebugView({color: 'cyan', hitSlop: this.props.hitSlop})}
      </Animated.View>
    );
  },
});

module.exports = TouchableOpacity;
<commit_msg>Add Example for TouchableOpacity.js<commit_after>/**
 * 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.
 *
 * @providesModule TouchableOpacity
 * @noflow
 */
'use strict';

// Note (avik): add @flow when Flow supports spread properties in propTypes

var Animated = require('Animated');
var Easing = require('Easing');
var NativeMethodsMixin = require('NativeMethodsMixin');
var React = require('React');
var PropTypes = require('prop-types');
var TimerMixin = require('react-timer-mixin');
var Touchable = require('Touchable');
var TouchableWithoutFeedback = require('TouchableWithoutFeedback');

var createReactClass = require('create-react-class');
var ensurePositiveDelayProps = require('ensurePositiveDelayProps');
var flattenStyle = require('flattenStyle');

type Event = Object;

var PRESS_RETENTION_OFFSET = {top: 20, left: 20, right: 20, bottom: 30};

/**
 * A wrapper for making views respond properly to touches.
 * On press down, the opacity of the wrapped view is decreased, dimming it.
 *
 * Opacity is controlled by wrapping the children in an Animated.View, which is
 * added to the view hiearchy.  Be aware that this can affect layout.
 *
 * Example:
 *
 * ```
 * renderButton: function() {
 *   return (
 *     <TouchableOpacity onPress={this._onPressButton}>
 *       <Image
 *         style={styles.button}
 *         source={require('./myButton.png')}
 *       />
 *     </TouchableOpacity>
 *   );
 * },
 * ```
 * ### Example
 *
 * ```ReactNativeWebPlayer
 * import React, { Component } from 'react'
 * import {
 *   AppRegistry,
 *   StyleSheet,
 *   TouchableOpacity,
 *   Text,
 *   View,
 * } from 'react-native'
 *
 * class App extends Component {
 * constructor(props) {
 *  super(props)
 *  this.state = { count: 0 }
 * }
 *
 * onPress = () => {
 *   this.setState({
 *     count: this.state.count+1
 *   })
 * }
 *
 *  render() {
 *     return (
 *       <View style={styles.container}>
 *         <TouchableOpacity
 *          style={styles.button}
 *          onPress={this.onPress}
 *        >
 *          <Text> Touch Here </Text>
 *        </TouchableOpacity>
 *        <View style={[styles.countContainer]}>
 *          <Text style={[styles.countText]}>
 *             { this.state.count !== 0 ? this.state.count: null}
 *           </Text>
 *         </View>
 *       </View>
 *     )
 *   }
 * }
 *
 * const styles = StyleSheet.create({
 *   container: {
 *     flex: 1,
 *     justifyContent: 'center',
 *     paddingHorizontal: 10
 *   },
 *   button: {
 *     alignItems: 'center',
 *     backgroundColor: '#DDDDDD',
 *     padding: 10
 *   },
 *   countContainer: {
 *     alignItems: 'center',
 *     padding: 10
 *   },
 *   countText: {
 *     color: '#FF00FF'
 *   }
 * })
 *
 * AppRegistry.registerComponent('App', () => App)
 * ```
 *
 */
var TouchableOpacity = createReactClass({
  displayName: 'TouchableOpacity',
  mixins: [TimerMixin, Touchable.Mixin, NativeMethodsMixin],

  propTypes: {
    ...TouchableWithoutFeedback.propTypes,
    /**
     * Determines what the opacity of the wrapped view should be when touch is
     * active. Defaults to 0.2.
     */
    activeOpacity: PropTypes.number,
    /**
     * Apple TV parallax effects
     */
    tvParallaxProperties: PropTypes.object,
  },

  getDefaultProps: function() {
    return {
      activeOpacity: 0.2,
    };
  },

  getInitialState: function() {
    return {
      ...this.touchableGetInitialState(),
      anim: new Animated.Value(this._getChildStyleOpacityWithDefault()),
    };
  },

  componentDidMount: function() {
    ensurePositiveDelayProps(this.props);
  },

  componentWillReceiveProps: function(nextProps) {
    ensurePositiveDelayProps(nextProps);
  },

  /**
   * Animate the touchable to a new opacity.
   */
  setOpacityTo: function(value: number, duration: number) {
    Animated.timing(
      this.state.anim,
      {
        toValue: value,
        duration: duration,
        easing: Easing.inOut(Easing.quad),
        useNativeDriver: true,
      }
    ).start();
  },

  /**
   * `Touchable.Mixin` self callbacks. The mixin will invoke these if they are
   * defined on your component.
   */
  touchableHandleActivePressIn: function(e: Event) {
    if (e.dispatchConfig.registrationName === 'onResponderGrant') {
      this._opacityActive(0);
    } else {
      this._opacityActive(150);
    }
    this.props.onPressIn && this.props.onPressIn(e);
  },

  touchableHandleActivePressOut: function(e: Event) {
    this._opacityInactive(250);
    this.props.onPressOut && this.props.onPressOut(e);
  },

  touchableHandlePress: function(e: Event) {
    this.props.onPress && this.props.onPress(e);
  },

  touchableHandleLongPress: function(e: Event) {
    this.props.onLongPress && this.props.onLongPress(e);
  },

  touchableGetPressRectOffset: function() {
    return this.props.pressRetentionOffset || PRESS_RETENTION_OFFSET;
  },

  touchableGetHitSlop: function() {
    return this.props.hitSlop;
  },

  touchableGetHighlightDelayMS: function() {
    return this.props.delayPressIn || 0;
  },

  touchableGetLongPressDelayMS: function() {
    return this.props.delayLongPress === 0 ? 0 :
      this.props.delayLongPress || 500;
  },

  touchableGetPressOutDelayMS: function() {
    return this.props.delayPressOut;
  },

  _opacityActive: function(duration: number) {
    this.setOpacityTo(this.props.activeOpacity, duration);
  },

  _opacityInactive: function(duration: number) {
    this.setOpacityTo(
      this._getChildStyleOpacityWithDefault(),
      duration
    );
  },

  _getChildStyleOpacityWithDefault: function() {
   var childStyle = flattenStyle(this.props.style) || {};
   return childStyle.opacity == undefined ? 1 : childStyle.opacity;
 },

  render: function() {
    return (
      <Animated.View
        accessible={this.props.accessible !== false}
        accessibilityLabel={this.props.accessibilityLabel}
        accessibilityComponentType={this.props.accessibilityComponentType}
        accessibilityTraits={this.props.accessibilityTraits}
        style={[this.props.style, {opacity: this.state.anim}]}
        nativeID={this.props.nativeID}
        testID={this.props.testID}
        onLayout={this.props.onLayout}
        isTVSelectable={true}
        tvParallaxProperties={this.props.tvParallaxProperties}
        hitSlop={this.props.hitSlop}
        onStartShouldSetResponder={this.touchableHandleStartShouldSetResponder}
        onResponderTerminationRequest={this.touchableHandleResponderTerminationRequest}
        onResponderGrant={this.touchableHandleResponderGrant}
        onResponderMove={this.touchableHandleResponderMove}
        onResponderRelease={this.touchableHandleResponderRelease}
        onResponderTerminate={this.touchableHandleResponderTerminate}>
        {this.props.children}
        {Touchable.renderDebugView({color: 'cyan', hitSlop: this.props.hitSlop})}
      </Animated.View>
    );
  },
});

module.exports = TouchableOpacity;

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