@react-native-picker/picker/dist/module/PickerIOS.ios.js

React Native Picker for iOS, Android, macOS, and Windows

/**
 * 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.
 *
 *
 * This is a controlled component version of RNCPickerIOS
 *
 * @format
 * 
 */
'use strict';

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

import * as React from 'react';
import { processColor, StyleSheet, View } from 'react-native';
import RNCPickerNativeComponent from './RNCPickerNativeComponent';

const PickerIOSItem = props => {
  return null;
};

class PickerIOS extends React.Component {
  constructor(...args) {
    super(...args);

    _defineProperty(this, "_picker", null);

    _defineProperty(this, "state", {
      selectedIndex: 0,
      items: []
    });

    _defineProperty(this, "_onChange", event => {
      if (this.props.onChange) {
        this.props.onChange(event);
      }

      if (this.props.onValueChange) {
        this.props.onValueChange(event.nativeEvent.newValue, event.nativeEvent.newIndex);
      } // The picker is a controlled component. This means we expect the
      // on*Change handlers to be in charge of updating our
      // `selectedValue` prop. That way they can also
      // disallow/undo/mutate the selection of certain values. In other
      // words, the embedder of this component should be the source of
      // truth, not the native component.


      if (this._picker && this.state.selectedIndex !== event.nativeEvent.newIndex) {
        this._picker.setNativeProps({
          selectedIndex: this.state.selectedIndex
        });
      }
    });
  }

  static getDerivedStateFromProps(props) {
    let selectedIndex = 0;
    const items = [];
    React.Children.toArray(props.children).forEach(function (child, index) {
      if (child.props.value === props.selectedValue) {
        selectedIndex = index;
      }

      items.push({
        value: child.props.value,
        label: child.props.label,
        textColor: processColor(child.props.color),
        testID: child.props.testID
      });
    });
    return {
      selectedIndex,
      items
    };
  }

  render() {
    var _this$props$numberOfL;

    let numberOfLines = Math.round((_this$props$numberOfL = this.props.numberOfLines) !== null && _this$props$numberOfL !== void 0 ? _this$props$numberOfL : 1);

    if (numberOfLines < 1) {
      numberOfLines = 1;
    }

    return /*#__PURE__*/React.createElement(View, {
      style: this.props.style
    }, /*#__PURE__*/React.createElement(RNCPickerNativeComponent, {
      ref: picker => {
        this._picker = picker;
      },
      themeVariant: this.props.themeVariant,
      testID: this.props.testID,
      style: [styles.pickerIOS, this.props.itemStyle],
      items: this.state.items,
      selectedIndex: this.state.selectedIndex,
      onChange: this._onChange,
      numberOfLines: numberOfLines
    }));
  }

}

_defineProperty(PickerIOS, "Item", PickerIOSItem);

const styles = StyleSheet.create({
  pickerIOS: {
    // The picker will conform to whatever width is given, but we do
    // have to set the component's height explicitly on the
    // surrounding view to ensure it gets rendered.
    height: 216
  }
});
export default PickerIOS;
//# sourceMappingURL=PickerIOS.ios.js.map