Update Pong/lib/main.dart

Pong/lib/main.dart

@@ -1,6 +1,14 @@
+import 'dart:async';
+import 'dart:math';
+
+import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter/scheduler.dart';
+
+import 'package:pong/pong_menu.dart';
 
 void main() {
+  // Run the PongGame app
   runApp(const PongGame());
 }
 
@@ -10,9 +18,11 @@ class PongGame extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
+      // Set the app title and theme
       title: 'Pong Game',
-      theme:
-          ThemeData(scaffoldBackgroundColor: Color.fromARGB(255, 41, 38, 38)),
+      theme: ThemeData(
+          scaffoldBackgroundColor: const Color.fromARGB(255, 41, 38, 38)),
+      // Set the initial screen to the StartScreen
       home: const StartScreen(),
     );
   }
@@ -26,6 +36,7 @@ class StartScreen extends StatelessWidget {
     return Scaffold(
       body: GestureDetector(
         onTap: () {
+          // Navigate to the GameScreen when tapped
           Navigator.of(context).push(MaterialPageRoute(
             builder: (context) {
               return const GameScreen();
@@ -33,9 +44,9 @@ class StartScreen extends StatelessWidget {
           ));
         },
         child: const Center(
+          // Display a message prompting the user to touch the screen to begin
           child: Text(
             'Berühren um zu beginnen!',
-            key: Key("tapToStart"),
             style: TextStyle(
               fontSize: 30,
               fontWeight: FontWeight.bold,
@@ -52,20 +63,155 @@ class GameScreen extends StatefulWidget {
   const GameScreen({super.key});
 
   @override
-  State<GameScreen> createState() => _GameScreenState();
+  State<GameScreen> createState() => GameScreenState();
 }
 
-class _GameScreenState extends State<GameScreen> {
-  final racketWidth = 120.0;
-  final racketHeight = 25.0;
+class GameScreenState extends State<GameScreen> {
+  // Constants defining properties of the game
+  final ballSize = 20.0;
+  final racketWidth = 100.0;
+  final racketHeight = 10.0;
   final racketBottomOffset = 100.0;
+  bool isPaused = false;
 
-  double ballX = 0;
-  double ballY = 0;
+  // Initial speed of the ball
+  final initialBallSpeed = 3.0;
+
+  // Variables to track ball and racket positions, speed, score, and game state
+  double ballPositionX = 0;
+  double ballPositionY = 0;
+  double ballSpeedX = 0;
+  double ballSpeedY = 0;
   double racketX = 20;
-  double racketY = 0;
+  int score = 0;
 
-  moveRacket(double x) {
+  // Ticker for updating the game state
+  late Ticker ticker;
+  double ballSpeedMultiplier = 1.1;
+
+  @override
+  void initState() {
+    super.initState();
+    // Initialize the game state when the widget is created
+    startGame();
+  }
+
+  // Initialize the game state
+  void startGame() {
+    final random = Random();
+    ballPositionX = 0;
+    ballPositionY = 0;
+    ballSpeedX = initialBallSpeed;
+    ballSpeedY = initialBallSpeed;
+    ballSpeedMultiplier = 1.1;
+    racketX = 200;
+    score = 0;
+
+    // Randomize initial ball direction
+    if (random.nextBool()) ballSpeedX = -ballSpeedX;
+    if (random.nextBool()) ballSpeedY = -ballSpeedY;
+
+    // Start the game loop after a delay
+    continueGame();
+  }
+
+  // Stop the game loop
+  void stopGame() {
+    ticker.dispose();
+  }
+
+  // Continue the game loop with a delay
+  void continueGame() {
+    if (!isPaused) {
+      Future.delayed(const Duration(seconds: 1), () {
+        ticker = Ticker((elapsed) {
+          setState(() {
+            moveBall(ballSpeedMultiplier);
+          });
+        });
+        ticker.start();
+      });
+    }
+  }
+
+  void moveBall(double ballSpeedMultiplier) {
+    // Update ball position based on speed and direction
+    ballPositionX += ballSpeedX * ballSpeedMultiplier;
+    ballPositionY += ballSpeedY * ballSpeedMultiplier;
+
+    // Get the screen size
+    final Size screenSize = MediaQuery.of(context).size;
+
+    // Check for collisions with horizontal walls and bounce the ball
+    if (ballPositionX < 0 || ballPositionX > screenSize.width - ballSize) {
+      ballSpeedX = -ballSpeedX;
+    }
+
+    // Check for collision with the top wall and bounce the ball
+    if (ballPositionY < 0) {
+      ballSpeedY = -ballSpeedY;
+    }
+
+    // Check if the ball has touched the floor
+    var ballTouchesFloor = ballPositionY > screenSize.height - ballSize;
+
+    // Check if the ball collides with the racket
+    var ballCollidesWithRacket =
+        ballPositionY + ballSize >= screenSize.height - racketBottomOffset &&
+            ballPositionY <= screenSize.height - racketBottomOffset &&
+            ballPositionX + ballSize >= racketX &&
+            ballPositionX <= racketX + racketWidth;
+
+    // Handle collision with the racket
+    if (ballCollidesWithRacket) {
+      // Check if the ball hits the top of the racket
+      if (ballPositionY <= screenSize.height - racketBottomOffset) {
+        ballSpeedY =
+            -ballSpeedY * ballSpeedMultiplier; // Bounce the ball upward
+        setState(() {
+          score += 1; // Increase the score
+          debugPrint('ballSpeedMultiplier: $ballSpeedMultiplier');
+        });
+
+        ballPositionY = screenSize.height - racketBottomOffset - ballSize;
+        // Adjust the Y position to stay above the racket
+      } else {
+        ballSpeedX =
+            -ballSpeedX * ballSpeedMultiplier; // Bounce the ball backward
+
+        // Adjust the Y position to prevent the ball from going through the racket
+        double adjustedY = screenSize.height - racketBottomOffset - ballSize;
+        if (ballPositionY < adjustedY) {
+          ballPositionY = adjustedY;
+        }
+      }
+
+      // Handle game over condition if the ball touches the floor
+    } else if (ballTouchesFloor) {
+      debugPrint('Game over');
+      stopGame();
+      showDialog(
+        context: context,
+        barrierDismissible: false,
+        builder: (BuildContext context) {
+          return PongMenu(
+            title: 'Game over!',
+            subTitle: 'Deine Punkte: $score',
+            child: CupertinoButton(
+              child: const Text('Nochmal spielen'),
+              onPressed: () {
+                Navigator.of(context).pop();
+                startGame();
+              },
+            ),
+          );
+        },
+      );
+    }
+  }
+
+  void moveRacket(double x) {
+    // Move the racket horizontally based on the user's touch position
     setState(() {
       racketX = x - racketWidth / 2;
     });
@@ -74,22 +220,70 @@ class _GameScreenState extends State<GameScreen> {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
-      body: GestureDetector(
-        onHorizontalDragUpdate: (details) {
-          moveRacket(details.globalPosition.dx);
-        },
-        child: CustomPaint(
-          key: const Key("customPaint"),
-          painter: PongGamePainter(
-              racketHeight: 30,
-              racketWidth: 100,
-              racketX: racketX,
-              racketBottomOffset: racketBottomOffset,
-              ballSize: 20,
-              ballX: 10,
-              ballY: 10),
-          size: Size.infinite,
-        ),
+      body: Stack(
+        children: [
+          GestureDetector(
+            // Listen for horizontal drag updates to move the racket
+            onHorizontalDragUpdate: (details) {
+              moveRacket(details.globalPosition.dx);
+            },
+            child: CustomPaint(
+              painter: PongGamePainter(
+                racketHeight: racketHeight,
+                racketWidth: racketWidth,
+                racketX: racketX,
+                racketBottomOffset: racketBottomOffset,
+                ballSize: ballSize,
+                ballX: ballPositionX,
+                ballY: ballPositionY,
+              ),
+              size: Size.infinite,
+            ),
+          ),
+          Center(
+            // Display the player's score in the center of the screen
+            child: Text(
+              'Punkte: $score',
+              style: const TextStyle(
+                fontSize: 30,
+                fontWeight: FontWeight.bold,
+              ),
+            ),
+          ),
+          Positioned(
+            top: 40,
+            right: 20,
+            child: IconButton(
+              icon: const Icon(
+                CupertinoIcons.pause,
+                size: 30,
+                color: Colors.white,
+              ),
+              onPressed: () {
+                // Pause the game and show dialog
+                stopGame();
+                showDialog(
+                    context: context,
+                    barrierDismissible: false,
+                    builder: (BuildContext context) {
+                      return PongMenu(
+                        title: 'Pause',
+                        subTitle: 'Deine Punkte: $score',
+                        child: CupertinoButton(
+                          onPressed: () {
+                            // Continues the game
+                            Navigator.of(context).pop();
+                            isPaused = false;
+                            continueGame();
+                          },
+                          child: const Text('Fortfahren'),
+                        ),
+                      );
+                    });
+              },
+            ),
+          )
+        ],
       ),
     );
   }
@@ -105,6 +299,7 @@ class PongGamePainter extends CustomPainter {
   final double racketHeight;
   final double racketBottomOffset;
 
+  // Constructor to initialize the painter with required properties
   PongGamePainter({
     required this.ballSize,
     required this.ballX,
@@ -117,14 +312,18 @@ class PongGamePainter extends CustomPainter {
 
   @override
   void paint(Canvas canvas, Size size) {
+    // Paint object for drawing the racket
     final racketPaint = Paint()..color = Colors.white;
+    // Paint object for drawing the ball
     final ballPaint = Paint()..color = Colors.white;
 
+    // Draw the ball as an oval on the canvas
     canvas.drawOval(
       Rect.fromLTWH(ballX, ballY, ballSize, ballSize),
       ballPaint,
     );
 
+    // Draw the racket as a rectangle on the canvas
     canvas.drawRect(
       Rect.fromLTWH(
         racketX,
@@ -138,6 +337,7 @@ class PongGamePainter extends CustomPainter {
 
   @override
   bool shouldRepaint(covariant PongGamePainter oldDelegate) {
+    // Repaint only if the ball or racket position changes
     return ballX != oldDelegate.ballX ||
         ballY != oldDelegate.ballY ||
         racketX != oldDelegate.racketX;