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import React, { Component } from 'react';
import { Text, View, Alert, StyleSheet, Button, AppRegistry, Navigator, TouchableHighlight, Platform} from 'react-native';
import { Ionicons } from '@expo/vector-icons';
import { createStackNavigator, createAppContainer } from 'react-navigation';
import { Location, Permissions, Constants } from 'expo';
export default class GreetingPage extends Component {
//Every component needs a render() function
state = {
location: null,
errorMessage: null,
};
componentWillMount() {
if (Platform.OS === 'android' && !Constants.isDevice) {
this.setState({
errorMessage: 'This will not work on an android device',
});
} else {
this._getLocationAsync();
}
}
_getLocationAsync = async () => {
let { status } = await Permissions.askAsync(Permissions.LOCATION);
if (status !== 'granted') {
this.setState({
errorMessage: 'Permission to access location was denied',
});
}
let location = await Location.getCurrentPositionAsync({});
this.setState({ location });
};
moveToFormPage = () => {
this._getLocationAsync;
if (this.state.location === null) {
Alert.alert("There was a problem accessing your location");
return;
}
const coordinates = [this.state.location.coords.longitude, this.state.location.coords.latitude];
this.props.navigation.navigate('FormPage', {coordinates : coordinates});
}
render() {
return (
//<View> acts like the way <div> does in JavaScript
//style={...} stores properties about where you want the component to be placed
//and how you want it to look. It's similar to adding CSS styles to HTML elements
//when creating web pages
<View style={styles.container}>
<View style={styles.titleContainer}>
<Text style={styles.title}>
Ensure that location services are enabled!
</Text>
</View>
<TouchableHighlight
style={styles.first_button_container}
onPress={() => { this.moveToFormPage()
}}>
<View style={styles.press_button}>
<View>
<Text style={styles.current_location_title}>
Use Current Location
</Text>
</View>
<View marginTop = {20}>
<Ionicons name="md-locate" size={40} color="white"/>
</View>
</View>
</TouchableHighlight>
<TouchableHighlight style={styles.second_button_container}>
<View style={styles.press_button}>
<View>
<Text style={styles.current_location_title}>
Drop Pin
</Text>
</View>
<View marginTop = {20}>
<Ionicons name="md-pin" size={40} color="white"/>
</View>
</View>
</TouchableHighlight>
</View>
);
}
}
const styles = StyleSheet.create( {
container: {
flex: 1,
flexDirection: 'column',
backgroundColor: '#40739e',
alignItems: 'stretch'
},
titleContainer: {
flex: 3,
//position: 'absolute',
marginTop: 205,
//flexGrow: 1
},
title: {
color: '#FFF',
marginTop: 10,
textAlign: 'center',
opacity: 0.9,
fontSize: 18,
fontStyle: 'italic'
},
current_location_title: {
color: '#FFF',
marginTop: 15,
textAlign: 'center',
opacity: 0.9,
fontSize: 20
},
first_button_container: {
flex: 1,
//position: 'absolute',
//marginTop: 360,
backgroundColor: '#c0392b',
flexDirection: 'row',
justifyContent: 'center',
alignItems: 'stretch'
},
press_button: {
flexDirection: 'column',
justifyContent: 'center',
alignItems: 'center'
},
second_button_container: {
flex: 1,
backgroundColor: '#535c68'
}
})
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