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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 {
state = {
isLoading: true,
errorMessage: null,
locationResult: null,
};
// runs as soon as page is loaded
componentDidMount() {
// immediately attempt to get the location
this._getLocationAsync();
}
_getLocationAsync = async () => {
// ask location services to allow location access to THIS app.
// Note: location services itself must still be enabled for this!
const {status} = await Permissions.askAsync(Permissions.LOCATION);
if (status === 'granted') {
// try to actually get the location asynchronously - a Promise
Location.getCurrentPositionAsync({enableHighAccuracy: true}).then((position) => {
this.setState({locationResult: position.coords});
// since we are guaranteed to have the location here, its safe to load the full view
this.setState({isLoading: false});
}).catch((e) => {
alert(e + ' Please make sure your location (GPS) is turned on.');
});
} else {
// if the user pressed "Deny" or something on the promt
throw new Error('Location permission not granted');
}
};
moveToFormPage = () => {
this.props.navigation.navigate('FormPage',
{coordinates : [
this.state.locationResult.longitude,
this.state.locationResult.latitude]
});
};
render() {
//<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
// initialy show a loading screen when trying to get location on load
if (this.state.isLoading) {
return (
<View style={styles.container}>
<View style={styles.titleContainer}>
<Text style={styles.title}>
Trying to get location...
</Text>
</View>
</View>
)
}
return (
<View style={styles.container}>
<View style={styles.titleContainer}>
<Text style={styles.title}>
Welcome to Helpthehome!
</Text>
</View>
<TouchableHighlight
style={styles.first_button_container}
onPress={() => { this.moveToFormPage() }}>
<View style={styles.press_button}>
<View padding={15}>
<Text style={styles.current_location_title}>
Use Current Location
</Text>
</View>
<View marginTop = {5}>
<Ionicons name="md-locate" size={40} color="white"/>
</View>
</View>
</TouchableHighlight>
<TouchableHighlight disabled style={styles.second_button_container}>
<View style={styles.press_button}>
<View padding={15}>
<Text style={styles.current_location_title}>
Drop Pin
</Text>
</View>
<View>
<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',
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: 'row',
justifyContent: 'space-between',
// padding:5,
alignItems: 'center'
},
second_button_container: {
flex: 1,
backgroundColor: '#535c68',
flexDirection: 'row',
justifyContent: 'center',
alignItems: 'stretch'
}
})
|
