react-native-macos
Version:
[Microsoft Fork] A framework for building native apps using React
303 lines (281 loc) • 7.73 kB
JavaScript
/**
* 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
*/
;
const React = require('react');
const {
Image,
StyleSheet,
Text,
TouchableWithoutFeedback,
TouchableOpacity,
View,
ViewPagerAndroid,
} = require('react-native');
import type {ViewPagerScrollState} from '../../Libraries/Components/ViewPager/ViewPagerAndroid';
const PAGES = 5;
const BGCOLOR = ['#fdc08e', '#fff6b9', '#99d1b7', '#dde5fe', '#f79273'];
const IMAGE_URIS = [
'https://apod.nasa.gov/apod/image/1410/20141008tleBaldridge001h990.jpg',
'https://apod.nasa.gov/apod/image/1409/volcanicpillar_vetter_960.jpg',
'https://apod.nasa.gov/apod/image/1409/m27_snyder_960.jpg',
'https://apod.nasa.gov/apod/image/1409/PupAmulti_rot0.jpg',
'https://apod.nasa.gov/apod/image/1510/lunareclipse_27Sep_beletskycrop4.jpg',
];
type Props = $ReadOnly<{||}>;
type State = {|likes: number|};
class LikeCount extends React.Component<Props, State> {
state = {
likes: 7,
};
onClick = () => {
this.setState({likes: this.state.likes + 1});
};
render() {
const thumbsUp = '\uD83D\uDC4D';
return (
<View style={styles.likeContainer}>
<TouchableOpacity onPress={this.onClick} style={styles.likeButton}>
<Text style={styles.likesText}>{thumbsUp + ' Like'}</Text>
</TouchableOpacity>
<Text style={styles.likesText}>{this.state.likes + ' likes'}</Text>
</View>
);
}
}
class Button extends React.Component {
_handlePress = () => {
if (this.props.enabled && this.props.onPress) {
this.props.onPress();
}
};
render() {
return (
<TouchableWithoutFeedback onPress={this._handlePress}>
<View
style={[
styles.button,
this.props.enabled ? {} : styles.buttonDisabled,
]}>
<Text style={styles.buttonText}>{this.props.text}</Text>
</View>
</TouchableWithoutFeedback>
);
}
}
class ProgressBar extends React.Component {
render() {
const fractionalPosition =
this.props.progress.position + this.props.progress.offset;
const progressBarSize =
(fractionalPosition / (PAGES - 1)) * this.props.size;
return (
<View style={[styles.progressBarContainer, {width: this.props.size}]}>
<View style={[styles.progressBar, {width: progressBarSize}]} />
</View>
);
}
}
class ViewPagerAndroidExample extends React.Component {
state = {
page: 0,
animationsAreEnabled: true,
scrollEnabled: true,
progress: {
position: 0,
offset: 0,
},
};
onPageSelected = e => {
this.setState({page: e.nativeEvent.position});
};
onPageScroll = e => {
this.setState({progress: e.nativeEvent});
};
onPageScrollStateChanged = (state: ViewPagerScrollState) => {
this.setState({scrollState: state});
};
move = delta => {
const page = this.state.page + delta;
this.go(page);
};
go = page => {
if (this.state.animationsAreEnabled) {
this.viewPager.setPage(page);
} else {
this.viewPager.setPageWithoutAnimation(page);
}
this.setState({page});
};
render() {
const pages = [];
for (let i = 0; i < PAGES; i++) {
const pageStyle = {
backgroundColor: BGCOLOR[i % BGCOLOR.length],
alignItems: 'center',
padding: 20,
};
pages.push(
<View key={i} style={pageStyle} collapsable={false}>
<Image
style={styles.image}
source={{uri: IMAGE_URIS[i % BGCOLOR.length]}}
/>
<LikeCount />
</View>,
);
}
const {page, animationsAreEnabled} = this.state;
return (
<View style={styles.container}>
<ViewPagerAndroid
style={styles.viewPager}
initialPage={0}
scrollEnabled={this.state.scrollEnabled}
onPageScroll={this.onPageScroll}
onPageSelected={this.onPageSelected}
onPageScrollStateChanged={this.onPageScrollStateChanged}
pageMargin={10}
ref={viewPager => {
this.viewPager = viewPager;
}}>
{pages}
</ViewPagerAndroid>
<View style={styles.buttons}>
<Button
enabled={true}
text={
this.state.scrollEnabled ? 'Scroll Enabled' : 'Scroll Disabled'
}
onPress={() =>
this.setState({scrollEnabled: !this.state.scrollEnabled})
}
/>
</View>
<View style={styles.buttons}>
{animationsAreEnabled ? (
<Button
text="Turn off animations"
enabled={true}
onPress={() => this.setState({animationsAreEnabled: false})}
/>
) : (
<Button
text="Turn animations back on"
enabled={true}
onPress={() => this.setState({animationsAreEnabled: true})}
/>
)}
<Text style={styles.scrollStateText}>
ScrollState[ {this.state.scrollState} ]
</Text>
</View>
<View style={styles.buttons}>
<Button text="Start" enabled={page > 0} onPress={() => this.go(0)} />
<Button
text="Prev"
enabled={page > 0}
onPress={() => this.move(-1)}
/>
<Text style={styles.buttonText}>
Page {page + 1} / {PAGES}
</Text>
<ProgressBar size={100} progress={this.state.progress} />
<Button
text="Next"
enabled={page < PAGES - 1}
onPress={() => this.move(1)}
/>
<Button
text="Last"
enabled={page < PAGES - 1}
onPress={() => this.go(PAGES - 1)}
/>
</View>
</View>
);
}
}
const styles = StyleSheet.create({
buttons: {
flexDirection: 'row',
height: 30,
backgroundColor: 'black',
alignItems: 'center',
justifyContent: 'space-between',
},
button: {
flex: 1,
width: 0,
margin: 5,
borderColor: 'gray',
borderWidth: 1,
backgroundColor: 'gray',
},
buttonDisabled: {
backgroundColor: 'black',
opacity: 0.5,
},
buttonText: {
color: 'white',
},
scrollStateText: {
color: '#99d1b7',
},
container: {
flex: 1,
backgroundColor: 'white',
},
image: {
width: 300,
height: 200,
padding: 20,
},
likeButton: {
backgroundColor: 'rgba(0, 0, 0, 0.1)',
borderColor: '#333333',
borderWidth: 1,
borderRadius: 5,
flex: 1,
margin: 8,
padding: 8,
},
likeContainer: {
flexDirection: 'row',
},
likesText: {
flex: 1,
fontSize: 18,
alignSelf: 'center',
},
progressBarContainer: {
height: 10,
margin: 10,
borderColor: '#eeeeee',
borderWidth: 2,
},
progressBar: {
alignSelf: 'flex-start',
flex: 1,
backgroundColor: '#eeeeee',
},
viewPager: {
flex: 1,
},
});
exports.title = '<ViewPagerAndroid>';
exports.description =
'Container that allows to flip left and right between child views.';
exports.examples = [
{
title: 'Basic pager',
render(): React.Element<typeof ViewPagerAndroidExample> {
return <ViewPagerAndroidExample />;
},
},
];