create-expo-cljs-app
Version:
Create a react native application with Expo and Shadow-CLJS!
588 lines (565 loc) • 16.9 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
* @flow strict-local
*/
;
const React = require('react');
const {
StyleSheet,
Text,
TouchableWithoutFeedback,
View,
} = require('react-native');
exports.title = 'View';
exports.documentationURL = 'https://reactnative.dev/docs/view';
exports.category = 'Basic';
exports.description = ('Basic building block of all UI, examples that ' +
'demonstrate some of the many styles available.': string);
exports.displayName = 'ViewExample';
exports.examples = [
{
title: 'Background Color',
render(): React.Node {
return (
<View style={{backgroundColor: '#527FE4', padding: 5}}>
<Text style={{fontSize: 11}}>Blue background</Text>
</View>
);
},
},
{
title: 'Border',
render(): React.Node {
return (
<View style={{borderColor: '#527FE4', borderWidth: 5, padding: 10}}>
<Text style={{fontSize: 11}}>5px blue border</Text>
</View>
);
},
},
{
title: 'Padding/Margin',
render(): React.Node {
const styles = StyleSheet.create({
box: {
backgroundColor: '#527FE4',
borderColor: '#000033',
borderWidth: 1,
},
});
return (
<View style={{borderColor: '#bb0000', borderWidth: 0.5}}>
<View style={[styles.box, {padding: 5}]}>
<Text style={{fontSize: 11}}>5px padding</Text>
</View>
<View style={[styles.box, {margin: 5}]}>
<Text style={{fontSize: 11}}>5px margin</Text>
</View>
<View
style={[
styles.box,
{margin: 5, padding: 5, alignSelf: 'flex-start'},
]}>
<Text style={{fontSize: 11}}>5px margin and padding,</Text>
<Text style={{fontSize: 11}}>widthAutonomous=true</Text>
</View>
</View>
);
},
},
{
title: 'Border Radius',
render(): React.Node {
return (
<View style={{borderWidth: 0.5, borderRadius: 5, padding: 5}}>
<Text style={{fontSize: 11}}>
Too much use of `borderRadius` (especially large radii) on anything
which is scrolling may result in dropped frames. Use sparingly.
</Text>
</View>
);
},
},
{
title: 'Border Style',
render(): React.Node {
type Props = $ReadOnly<{||}>;
type State = {|
showBorder: boolean,
|};
class ViewBorderStyleExample extends React.Component<Props, State> {
state = {
showBorder: true,
};
render() {
return (
<TouchableWithoutFeedback onPress={this._handlePress}>
<View>
<View
style={[
{
borderWidth: 1,
padding: 5,
},
this.state.showBorder
? {
borderStyle: 'dashed',
}
: null,
]}>
<Text style={{fontSize: 11}}>Dashed border style</Text>
</View>
<View
style={[
{
marginTop: 5,
borderWidth: 1,
borderRadius: 5,
padding: 5,
},
this.state.showBorder
? {
borderStyle: 'dotted',
}
: null,
]}>
<Text style={{fontSize: 11}}>Dotted border style</Text>
</View>
</View>
</TouchableWithoutFeedback>
);
}
_handlePress = () => {
this.setState({showBorder: !this.state.showBorder});
};
}
return <ViewBorderStyleExample />;
},
},
{
title: 'Rounded Borders',
render(): React.Node {
return (
<View style={{flexDirection: 'row'}}>
<View
style={{
width: 50,
height: 50,
borderRadius: 25,
borderWidth: 1,
marginRight: 10,
}}
/>
<View
style={{
width: 50,
height: 50,
borderRadius: 25,
borderWidth: 10,
marginRight: 10,
}}
/>
<View
style={{
width: 50,
height: 50,
borderTopLeftRadius: 5,
borderTopRightRadius: 10,
borderBottomRightRadius: 25,
borderBottomLeftRadius: 50,
borderWidth: 1,
marginRight: 10,
}}
/>
<View
style={{
width: 50,
height: 50,
borderTopLeftRadius: 5,
borderTopRightRadius: 10,
borderBottomRightRadius: 25,
borderBottomLeftRadius: 50,
borderWidth: 10,
marginRight: 10,
}}
/>
</View>
);
},
},
{
title: 'Overflow',
render(): React.Node {
const styles = StyleSheet.create({
container: {
borderWidth: StyleSheet.hairlineWidth,
height: 12,
marginBottom: 8,
marginEnd: 16,
width: 95,
},
content: {
height: 20,
width: 200,
},
});
// NOTE: The <View> that sets `overflow` should only have other layout
// styles so that we can accurately test view flattening optimizations.
return (
<View style={{flexDirection: 'row'}}>
<View style={styles.container}>
<View style={[StyleSheet.absoluteFill]}>
<Text style={styles.content}>undefined</Text>
</View>
</View>
<View style={styles.container}>
<View style={[StyleSheet.absoluteFill, {overflow: 'hidden'}]}>
<Text style={styles.content}>hidden</Text>
</View>
</View>
<View style={styles.container}>
<View style={[StyleSheet.absoluteFill, {overflow: 'visible'}]}>
<Text style={styles.content}>visible</Text>
</View>
</View>
</View>
);
},
},
{
title: 'Opacity',
render(): React.Node {
return (
<View>
<View style={{opacity: 0}}>
<Text>Opacity 0</Text>
</View>
<View style={{opacity: 0.1}}>
<Text>Opacity 0.1</Text>
</View>
<View style={{opacity: 0.3}}>
<Text>Opacity 0.3</Text>
</View>
<View style={{opacity: 0.5}}>
<Text>Opacity 0.5</Text>
</View>
<View style={{opacity: 0.7}}>
<Text>Opacity 0.7</Text>
</View>
<View style={{opacity: 0.9}}>
<Text>Opacity 0.9</Text>
</View>
<View style={{opacity: 1}}>
<Text>Opacity 1</Text>
</View>
</View>
);
},
},
{
title: 'Offscreen Alpha Compositing',
render(): React.Node {
type Props = $ReadOnly<{||}>;
type State = {|
active: boolean,
|};
const styles = StyleSheet.create({
alphaCompositing: {
justifyContent: 'space-around',
width: 100,
height: 50,
borderRadius: 100,
},
});
class OffscreenAlphaCompositing extends React.Component<Props, State> {
state = {
active: false,
};
render() {
return (
<TouchableWithoutFeedback onPress={this._handlePress}>
<View>
<Text style={{paddingBottom: 10}}>Blobs</Text>
<View
style={{opacity: 1.0, paddingBottom: 30}}
needsOffscreenAlphaCompositing={this.state.active}>
<View
style={[
styles.alphaCompositing,
{marginTop: 0, marginLeft: 0, backgroundColor: '#FF6F59'},
]}
/>
<View
style={[
styles.alphaCompositing,
{
marginTop: -50,
marginLeft: 50,
backgroundColor: '#F7CB15',
},
]}
/>
</View>
<Text style={{paddingBottom: 10}}>
Same blobs, but their shared container have 0.5 opacity
</Text>
<Text style={{paddingBottom: 10}}>
Tap to {this.state.active ? 'activate' : 'deactivate'}{' '}
needsOffscreenAlphaCompositing
</Text>
<View
style={{opacity: 0.8}}
needsOffscreenAlphaCompositing={this.state.active}>
<View
style={[
styles.alphaCompositing,
{marginTop: 0, marginLeft: 0, backgroundColor: '#FF6F59'},
]}
/>
<View
style={[
styles.alphaCompositing,
{
marginTop: -50,
marginLeft: 50,
backgroundColor: '#F7CB15',
},
]}
/>
</View>
</View>
</TouchableWithoutFeedback>
);
}
_handlePress = () => {
this.setState({active: !this.state.active});
};
}
return <OffscreenAlphaCompositing />;
},
},
{
title: 'ZIndex',
render(): React.Node {
type Props = $ReadOnly<{||}>;
type State = {|
flipped: boolean,
|};
const styles = StyleSheet.create({
zIndex: {
justifyContent: 'space-around',
width: 100,
height: 50,
marginTop: -10,
},
});
class ZIndexExample extends React.Component<Props, State> {
state = {
flipped: false,
};
render() {
const indices = this.state.flipped ? [-1, 0, 1, 2] : [2, 1, 0, -1];
return (
<TouchableWithoutFeedback onPress={this._handlePress}>
<View>
<Text style={{paddingBottom: 10}}>
Tap to flip sorting order
</Text>
<View
style={[
styles.zIndex,
{
marginTop: 0,
backgroundColor: '#E57373',
zIndex: indices[0],
},
]}>
<Text>ZIndex {indices[0]}</Text>
</View>
<View
style={[
styles.zIndex,
{
marginLeft: 50,
backgroundColor: '#FFF176',
zIndex: indices[1],
},
]}>
<Text>ZIndex {indices[1]}</Text>
</View>
<View
style={[
styles.zIndex,
{
marginLeft: 100,
backgroundColor: '#81C784',
zIndex: indices[2],
},
]}>
<Text>ZIndex {indices[2]}</Text>
</View>
<View
style={[
styles.zIndex,
{
marginLeft: 150,
backgroundColor: '#64B5F6',
zIndex: indices[3],
},
]}>
<Text>ZIndex {indices[3]}</Text>
</View>
</View>
</TouchableWithoutFeedback>
);
}
_handlePress = () => {
this.setState({flipped: !this.state.flipped});
};
}
return <ZIndexExample />;
},
},
{
title: '`display: none` style',
render(): React.Node {
type Props = $ReadOnly<{||}>;
type State = {|
index: number,
|};
class DisplayNoneStyle extends React.Component<Props, State> {
state = {
index: 0,
};
render() {
return (
<TouchableWithoutFeedback onPress={this._handlePress}>
<View>
<Text style={{paddingBottom: 10}}>
Press to toggle `display: none`
</Text>
<View
style={{
height: 50,
width: 50,
backgroundColor: 'red',
display: this.state.index % 2 === 0 ? 'none' : 'flex',
}}
/>
<View
style={{
height: 50,
width: 50,
backgroundColor: 'blue',
display: this.state.index % 3 === 0 ? 'none' : 'flex',
}}
/>
<View
style={{
height: 50,
width: 50,
backgroundColor: 'yellow',
display: this.state.index % 5 === 0 ? 'none' : 'flex',
}}>
<View
style={{
height: 30,
width: 30,
backgroundColor: 'salmon',
display: this.state.index % 11 === 0 ? 'none' : 'flex',
}}
/>
</View>
<View
style={{
height: 50,
width: 50,
backgroundColor: 'magenta',
display: this.state.index % 7 === 0 ? 'none' : 'flex',
}}
/>
</View>
</TouchableWithoutFeedback>
);
}
_handlePress = () => {
this.setState({index: this.state.index + 1});
};
}
return <DisplayNoneStyle />;
},
},
{
title: 'BackfaceVisibility',
render: function(): React.Node {
return (
<>
<Text style={{paddingBottom: 10}}>
View #1, front is visible, back is hidden.
</Text>
<View style={{justifyContent: 'center', alignItems: 'center'}}>
<View
style={{
height: 200,
width: 200,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: 'blue',
backfaceVisibility: 'hidden',
}}>
<Text>Front</Text>
</View>
<View
style={{
height: 200,
width: 200,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: 'red',
backfaceVisibility: 'hidden',
transform: [{rotateY: '180deg'}],
position: 'absolute',
top: 0,
}}>
<Text>Back (You should not see this)</Text>
</View>
</View>
<Text style={{paddingVertical: 10}}>
View #2, front is hidden, back is visible.
</Text>
<View style={{justifyContent: 'center', alignItems: 'center'}}>
<View
style={{
height: 200,
width: 200,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: 'blue',
backfaceVisibility: 'hidden',
}}>
<Text>Front (You should not see this)</Text>
</View>
<View
style={{
height: 200,
width: 200,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: 'red',
backfaceVisibility: 'hidden',
position: 'absolute',
top: 0,
}}>
<Text>Back</Text>
</View>
</View>
</>
);
},
},
];