117 lines
3.3 KiB
JavaScript
117 lines
3.3 KiB
JavaScript
/**
|
|
* 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 PickerIOS
|
|
*
|
|
* This is a controlled component version of RCTPickerIOS
|
|
*/
|
|
'use strict';
|
|
|
|
var NativeMethodsMixin = require('NativeMethodsMixin');
|
|
var React = require('React');
|
|
var ReactChildren = require('ReactChildren');
|
|
var ReactNativeViewAttributes = require('ReactNativeViewAttributes');
|
|
var RCTPickerIOSConsts = require('NativeModules').UIManager.RCTPicker.Constants;
|
|
var StyleSheet = require('StyleSheet');
|
|
var View = require('View');
|
|
|
|
var requireNativeComponent = require('requireNativeComponent');
|
|
var merge = require('merge');
|
|
|
|
var PICKER = 'picker';
|
|
|
|
var PickerIOS = React.createClass({
|
|
mixins: [NativeMethodsMixin],
|
|
|
|
propTypes: {
|
|
onValueChange: React.PropTypes.func,
|
|
selectedValue: React.PropTypes.any, // string or integer basically
|
|
},
|
|
|
|
getInitialState: function() {
|
|
return this._stateFromProps(this.props);
|
|
},
|
|
|
|
componentWillReceiveProps: function(nextProps) {
|
|
this.setState(this._stateFromProps(nextProps));
|
|
},
|
|
|
|
// Translate PickerIOS prop and children into stuff that RCTPickerIOS understands.
|
|
_stateFromProps: function(props) {
|
|
var selectedIndex = 0;
|
|
var items = [];
|
|
ReactChildren.forEach(props.children, function (child, index) {
|
|
if (child.props.value === props.selectedValue) {
|
|
selectedIndex = index;
|
|
}
|
|
items.push({value: child.props.value, label: child.props.label});
|
|
});
|
|
return {selectedIndex, items};
|
|
},
|
|
|
|
render: function() {
|
|
return (
|
|
<View style={this.props.style}>
|
|
<RCTPickerIOS
|
|
ref={PICKER}
|
|
style={styles.pickerIOS}
|
|
items={this.state.items}
|
|
selectedIndex={this.state.selectedIndex}
|
|
onChange={this._onChange}
|
|
/>
|
|
</View>
|
|
);
|
|
},
|
|
|
|
_onChange: function(event) {
|
|
if (this.props.onChange) {
|
|
this.props.onChange(event);
|
|
}
|
|
if (this.props.onValueChange) {
|
|
this.props.onValueChange(event.nativeEvent.newValue);
|
|
}
|
|
|
|
// 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.state.selectedIndex !== event.nativeEvent.newIndex) {
|
|
this.refs[PICKER].setNativeProps({
|
|
selectedIndex: this.state.selectedIndex
|
|
});
|
|
}
|
|
},
|
|
});
|
|
|
|
PickerIOS.Item = React.createClass({
|
|
propTypes: {
|
|
value: React.PropTypes.any, // string or integer basically
|
|
label: React.PropTypes.string,
|
|
},
|
|
|
|
render: function() {
|
|
// These items don't get rendered directly.
|
|
return null;
|
|
},
|
|
});
|
|
|
|
var 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: RCTPickerIOSConsts.ComponentHeight,
|
|
},
|
|
});
|
|
|
|
var RCTPickerIOS = requireNativeComponent('RCTPicker', null);
|
|
|
|
module.exports = PickerIOS;
|