Doris’s Dating App

import 'package:flutter/material.dart';
 
void main() => runApp(App0707());
 
class App0707 extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: MyHomePage(),
);
}
}
 
class MyHomePage extends StatefulWidget {
@override
_MyHomePageState createState() => _MyHomePageState();
}
 
const _youAre = 'You are';
const _compatible = 'compatible with\nDoris D. Developer.';
 
enum Gender { Female, Male, Other }
 
String show(Gender gender) => gender.toString().replaceAll("Gender.", "");
 
enum Relationship {
Friend,
OneDate,
Ongoing,
Committed,
Marriage,
}
 
Map<Relationship, String> nice = {
Relationship.Friend: "Friend",
Relationship.OneDate: "One date",
Relationship.Ongoing: "Ongoing relationship",
Relationship.Committed: "Committed relationship",
Relationship.Marriage: "Marriage",
};
 
List<DropdownMenuItem<Relationship>> _relationshipsList = [
DropdownMenuItem(
value: Relationship.Friend,
child: Text(nice[Relationship.Friend]),
),
DropdownMenuItem(
value: Relationship.OneDate,
child: Text(nice[Relationship.OneDate]),
),
DropdownMenuItem(
value: Relationship.Ongoing,
child: Text(nice[Relationship.Ongoing]),
),
DropdownMenuItem(
value: Relationship.Committed,
child: Text(nice[Relationship.Committed]),
),
DropdownMenuItem(
value: Relationship.Marriage,
child: Text(nice[Relationship.Marriage]),
),
];
 
class _MyHomePageState extends State<MyHomePage> {
TextEditingController _nameFieldController;
bool _ageSwitchValue;
Gender _genderRadioValue;
Relationship _relationshipDropdownValue;
double _loveFlutterSliderValue;
String _messageToUser;
Image _resultImage;
 
/// State
 
@override
void initState() {
super.initState();
_nameFieldController = TextEditingController();
_reset();
}
 
@override
void dispose() {
_nameFieldController.dispose();
super.dispose();
}

@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("Are you compatible with Doris?"),
),
body: GestureDetector(
onTap: () {
FocusScope.of(context).requestFocus(FocusNode());
},
child: SingleChildScrollView(
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
_buildTitleImage(),
_buildNameTextField(),
_buildAgeSwitch(),
_buildGenderRadio(),
_buildRelationshipDropdown(),
_buildLoveFlutterSlider(),
_buildSubmitRow(),
],
),
),
),
);
}
 
/// Build
 
Widget _buildTitleImage() {
return Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Image.asset("Heart.png"),
Image.asset("BrokenHeart.png"),
],
);
}
 
Widget _buildNameTextField() {
return Container(
padding: EdgeInsets.symmetric(vertical: 4.0, horizontal: 8.0),
child: TextField(
controller: _nameFieldController,
decoration: InputDecoration(
labelText: "Your name:",
border: OutlineInputBorder(
borderRadius: BorderRadius.all(Radius.circular(10.0)),
),
),
),
);
}
 
Widget _buildCommonBorder({Widget child}) {
return Container(
padding: EdgeInsets.symmetric(vertical: 10.0, horizontal: 10.0),
margin: EdgeInsets.symmetric(vertical: 4.0, horizontal: 8.0),
decoration: BoxDecoration(
border: Border.all(width: 0.5),
borderRadius: BorderRadius.all(
Radius.circular(10.0),
),
),
child: child,
);
}
 
Widget _buildAgeSwitch() {
return _buildCommonBorder(
child: Row(
children: <Widget>[
Text("Are you 18 or older?"),
Switch(
value: _ageSwitchValue,
onChanged: _updateAgeSwitch,
),
],
),
);
}
 
Widget _buildGenderRadio() {
return _buildCommonBorder(
child: Row(
children: <Widget>[
Text(show(Gender.Female)),
Radio(
value: Gender.Female,
groupValue: _genderRadioValue,
onChanged: _updateGenderRatio,
),
SizedBox(width: 25.0),
Text(show(Gender.Male)),
Radio(
value: Gender.Male,
groupValue: _genderRadioValue,
onChanged: _updateGenderRatio,
),
SizedBox(width: 25.0),
Text(show(Gender.Other)),
Radio(
value: Gender.Other,
groupValue: _genderRadioValue,
onChanged: _updateGenderRatio,
),
],
),
);
}
 
Widget _buildRelationshipDropdown() {
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text("What kind of relationship are you looking for?"),
_buildDropdownButtonRow(),
],
);
}
 
Widget _buildDropdownButtonRow() {
return _buildCommonBorder(
child: Row(
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
DropdownButton<Relationship>(
items: _relationshipsList,
onChanged: _updateRelationshipDropdown,
value: _relationshipDropdownValue,
hint: Text("Select One"),
),
if (_relationshipDropdownValue != null)
FlatButton(
child: Text(
"Reset",
style: TextStyle(color: Colors.blue),
),
onPressed: _resetDropdown,
),
],
),
);
}
 
Widget _buildLoveFlutterSlider() {
return _buildCommonBorder(
child: Column(
children: <Widget>[
Text("On a scale of 1 to 10, "
"how much do you love developing Flutter apps?"),
Slider(
min: 1.0,
max: 10.0,
divisions: 9,
value: _loveFlutterSliderValue,
onChanged: _updateLoveFlutterSlider,
label: ’${_loveFlutterSliderValue.toInt()}’,
),
],
),
);
}
 
Widget _buildSubmitRow() {
return Container(
padding: const EdgeInsets.symmetric(vertical: 12.0, horizontal: 8.0),
child: Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
RaisedButton(
child: Text("Submit"),
onPressed: _updateResults,
),
SizedBox(
width: 15.0,
),
RaisedButton(
child: Text("Reset"),
onPressed: () => setState(_reset),
),
SizedBox(
width: 15.0,
),
Expanded(
child: Column(
children: <Widget>[
Text(_messageToUser, textAlign: TextAlign.center),
_resultImage ?? SizedBox(),
],
),
),
],
),
);
}
 
/// Actions
 
void _reset() {
_nameFieldController.text = "";
_ageSwitchValue = false;
_genderRadioValue = null;
_relationshipDropdownValue = null;
_loveFlutterSliderValue = 1.0;
_messageToUser = "";
_resultImage = null;
}
 
void _updateAgeSwitch(bool newValue) {
setState(() {
_ageSwitchValue = newValue;
});
}
 
void _updateGenderRatio(Gender newValue) {
setState(() {
_genderRadioValue = newValue;
});
}
 
void _updateRelationshipDropdown(Relationship newValue) {
setState(() {
_relationshipDropdownValue = newValue;
});
}
 
void _resetDropdown() {
setState(() {
_relationshipDropdownValue = null;
});
}
 
void _updateLoveFlutterSlider(double newValue) {
setState(() {
_loveFlutterSliderValue = newValue;
});
}
 
void _updateResults() {
bool isCompatible = _ageSwitchValue && _loveFlutterSliderValue >= 8;
setState(() {
_resultImage =
Image.asset(isCompatible ? "Heart.png" : "BrokenHeart.png");
_messageToUser = _nameFieldController.text +
"\n" +
_youAre +
(isCompatible ? " " : " NOT ") +
_compatible;
});
}
}