react-native/RNTester/js/ViewExample.js

/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @format
 * @flow
 */

'use strict';

var React = require('react');
var ReactNative = require('react-native');
var {StyleSheet, Text, View} = ReactNative;
var TouchableWithoutFeedback = require('TouchableWithoutFeedback');

var styles = StyleSheet.create({
  box: {
    backgroundColor: '#527FE4',
    borderColor: '#000033',
    borderWidth: 1,
  },
  zIndex: {
    justifyContent: 'space-around',
    width: 100,
    height: 50,
    marginTop: -10,
  },
});

class ViewBorderStyleExample extends React.Component<{}, $FlowFixMeState> {
  state = {
    showBorder: true,
  };

  render() {
    return (
      <TouchableWithoutFeedback onPress={this._handlePress}>
        <View>
          <View
            style={{
              borderWidth: 1,
              borderStyle: this.state.showBorder ? 'dashed' : null,
              padding: 5,
            }}>
            <Text style={{fontSize: 11}}>Dashed border style</Text>
          </View>
          <View
            style={{
              marginTop: 5,
              borderWidth: 1,
              borderRadius: 5,
              borderStyle: this.state.showBorder ? 'dotted' : null,
              padding: 5,
            }}>
            <Text style={{fontSize: 11}}>Dotted border style</Text>
          </View>
        </View>
      </TouchableWithoutFeedback>
    );
  }

  _handlePress = () => {
    this.setState({showBorder: !this.state.showBorder});
  };
}

class ZIndexExample extends React.Component<{}, $FlowFixMeState> {
  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});
  };
}

exports.title = '<View>';
exports.description =
  'Basic building block of all UI, examples that ' +
  'demonstrate some of the many styles available.';

exports.displayName = 'ViewExample';
exports.examples = [
  {
    title: 'Background Color',
    render: function() {
      return (
        <View style={{backgroundColor: '#527FE4', padding: 5}}>
          <Text style={{fontSize: 11}}>Blue background</Text>
        </View>
      );
    },
  },
  {
    title: 'Border',
    render: function() {
      return (
        <View style={{borderColor: '#527FE4', borderWidth: 5, padding: 10}}>
          <Text style={{fontSize: 11}}>5px blue border</Text>
        </View>
      );
    },
  },
  {
    title: 'Padding/Margin',
    render: function() {
      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: function() {
      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: function() {
      return <ViewBorderStyleExample />;
    },
  },
  {
    title: 'Circle with Border Radius',
    render: function() {
      return (
        <View
          style={{borderRadius: 10, borderWidth: 1, width: 20, height: 20}}
        />
      );
    },
  },
  {
    title: 'Overflow',
    render: function() {
      return (
        <View style={{flexDirection: 'row'}}>
          <View
            style={{
              width: 95,
              height: 10,
              marginRight: 10,
              marginBottom: 5,
              overflow: 'hidden',
              borderWidth: 0.5,
            }}>
            <View style={{width: 200, height: 20}}>
              <Text>Overflow hidden</Text>
            </View>
          </View>
          <View
            style={{width: 95, height: 10, marginBottom: 5, borderWidth: 0.5}}>
            <View style={{width: 200, height: 20}}>
              <Text>Overflow visible</Text>
            </View>
          </View>
        </View>
      );
    },
  },
  {
    title: 'Opacity',
    render: function() {
      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: 'ZIndex',
    render: function() {
      return <ZIndexExample />;
    },
  },
];