Game model

lib/control.dart

@@ -1,34 +1,45 @@
+import 'package:bullseye/game_model.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_platform_widgets/flutter_platform_widgets.dart';
 
 class Control extends StatefulWidget {
-  Control({Key? key}) : super(key: key);
+  Control({Key? key, @required this.model}) : super(key: key);
+  final GameModel? model;
 
   @override
   State<StatefulWidget> createState() => _ControlState();
 }
 
 class _ControlState extends State<Control> {
-  double _currentValue = 50.0;
+  static const double PADDING = 45;
 
   @override
   Widget build(BuildContext context) {
+    var currentValue = widget.model?.current;
+
     return Row(
       mainAxisAlignment: MainAxisAlignment.center,
       children: [
-        PlatformText("1"),
-        PlatformSlider(
-          value: _currentValue,
-          onChanged: (newValue) {
-            setState(() {
-              _currentValue = newValue;
-              print(_currentValue);
-            });
-          },
-          min: 1.0,
-          max: 100.0,
+        Padding(
+          padding: const EdgeInsets.all(PADDING),
+          child: PlatformText("1"),
         ),
-        PlatformText("100")
+        Expanded(
+          child: PlatformSlider(
+            value: currentValue!.toDouble(),
+            onChanged: (newValue) {
+              setState(() {
+                widget.model!.current = newValue.toInt();
+              });
+            },
+            min: 1.0,
+            max: 100.0,
+          ),
+        ),
+        Padding(
+          padding: const EdgeInsets.all(PADDING),
+          child: PlatformText("100"),
+        )
       ],
     );
   }

lib/game_model.dart

@@ -0,0 +1,15 @@
+class GameModel {
+  static const SLIDER_CONST = 50;
+  static const SCORE_START = 0;
+  static const ROUND_START = 0;
+
+  GameModel(this.target,
+      [this.current = SLIDER_CONST,
+      this.totalScore = SCORE_START,
+      this.round = ROUND_START]);
+
+  int? target;
+  int? current;
+  int? totalScore;
+  int? round;
+}

lib/main.dart

@@ -1,9 +1,11 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_platform_widgets/flutter_platform_widgets.dart';
+
 import 'package:flutter/services.dart';
 import 'package:bullseye/prompt.dart';
 import 'package:bullseye/control.dart';
 import 'package:bullseye/score.dart';
-import 'package:flutter_platform_widgets/flutter_platform_widgets.dart';
+import 'package:bullseye/game_model.dart';
 
 void main() => runApp(BullsEyeApp());
 
@@ -33,6 +35,13 @@ class GamePage extends StatefulWidget {
 
 class _GamePageState extends State<GamePage> {
   bool _alertIsVisable = false;
+  GameModel _model = GameModel(50);
+
+  @override
+  void initState() {
+    super.initState();
+    _model = GameModel(50);
+  }
 
   @override
   Widget build(BuildContext context) {
@@ -41,15 +50,15 @@ class _GamePageState extends State<GamePage> {
         child: Column(
           mainAxisAlignment: MainAxisAlignment.center,
           children: [
-            Prompt(targetValue: 100),
-            Control(),
+            Prompt(targetValue: _model.target),
+            Control(model: _model),
             PlatformTextButton(
                 child: PlatformText('Hit me!'),
                 onPressed: () {
                   this._alertIsVisable = true;
                   _showAlert(context);
                 }),
-            Score()
+            Score(totalScore: _model.totalScore, round: _model.round)
           ],
         ),
       ),

lib/score.dart

@@ -2,19 +2,39 @@ import 'package:flutter/material.dart';
 import 'package:flutter_platform_widgets/flutter_platform_widgets.dart';
 
 class Score extends StatelessWidget {
+  Score({Key? key, @required this.totalScore, @required this.round})
+      : super(key: key);
+
+  final int? totalScore;
+  final int? round;
+
   @override
   Widget build(BuildContext context) {
     return Row(
       mainAxisAlignment: MainAxisAlignment.center,
-      children: <Widget>[
+      children: [
         PlatformButton(
           child: PlatformText("Start Over"),
           onPressed: () {},
         ),
-        PlatformText("Score:"),
-        PlatformText("999"),
-        PlatformText("Round:"),
-        PlatformText("999"),
+        Padding(
+          padding: const EdgeInsets.all(8.0),
+          child: Row(
+            children: [
+              PlatformText("Score:"),
+              PlatformText("$totalScore"),
+            ],
+          ),
+        ),
+        Padding(
+          padding: const EdgeInsets.all(8.0),
+          child: Row(
+            children: [
+              PlatformText("Round:"),
+              PlatformText("$round"),
+            ],
+          ),
+        ),
         PlatformButton(
           child: PlatformText("Info"),
           onPressed: () {},