add custom event handler for victories and draws

.idea/inspectionProfiles/Project_Default.xml

+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="TrivialIf" enabled="true" level="WARNING" enabled_by_default="true">
+      <option name="ignoreChainedIf" value="true" />
+    </inspection_tool>
+  </profile>
+</component>
\ No newline at end of file

src/main/java/com/example/tictactoe_game/TicTacToeFX.java

 package com.example.tictactoe_game;
 
 import javafx.application.Application;
+import javafx.event.EventHandler;
 import javafx.scene.Scene;
 import javafx.scene.control.Button;
 import javafx.scene.layout.GridPane;
+import javafx.scene.layout.VBox;
+import javafx.scene.text.Text;
+import javafx.stage.Modality;
 import javafx.stage.Stage;
 
 public class TicTacToeFX extends Application {
@@ -14,6 +18,30 @@ public class TicTacToeFX extends Application {
 
     @Override
     public void start(Stage primaryStage) {
+
+        EventHandler<GameEvent> handler = new EventHandler<GameEvent>() {
+            @Override
+            public void handle(GameEvent gameEvent) {
+
+                String currentPlayer = isXTurn ? "X" : "O";
+
+                final Stage dialog = new Stage();
+                dialog.initModality(Modality.APPLICATION_MODAL);
+                dialog.initOwner(primaryStage);
+                VBox dialogVbox = new VBox(20);
+                if(gameEvent.getEventType() == GameEvent.VICTORY_EVENT) {
+                    dialogVbox.getChildren().add(new Text("This is a victory for player " + currentPlayer + "!"));
+                }
+                else if(gameEvent.getEventType() == GameEvent.DRAW_EVENT) {
+                    dialogVbox.getChildren().add(new Text("This is a Draw!"));
+                }
+                Scene dialogScene = new Scene(dialogVbox, 150, 150);
+                dialog.setScene(dialogScene);
+                dialog.show();
+            }
+        };
+
+
         // Erstelle das das Spielfeld
         GridPane grid = new GridPane();
 
@@ -24,7 +52,8 @@ public class TicTacToeFX extends Application {
                 button.setPrefSize(100, 100); // Größe der Buttons
                 grid.add(button, col, row); // Hinzufügen zum Grid
                 buttons[row][col] = button;
-
+                button.addEventHandler(GameEvent.VICTORY_EVENT, handler);
+                button.addEventHandler(GameEvent.DRAW_EVENT, handler);
                 button.setOnAction(event -> handleButtonClick(button));
             }
         }
@@ -40,17 +69,17 @@ public class TicTacToeFX extends Application {
         if(button.getText().isEmpty()) {
             if (this.isXTurn) {
                 button.setText("X");
-                this.isXTurn = false;
             } else {
                 button.setText("O");
-                this.isXTurn = true;
             }
             if (checkForWin()) {
-                buttons[1][1].setText("juhu");
+                button.fireEvent(new GameEvent(GameEvent.VICTORY_EVENT));
             }
             else if(checkForDraw()){
-                buttons[1][1].setText("draw");
+                button.fireEvent(new GameEvent(GameEvent.DRAW_EVENT));
             }
+
+            this.isXTurn = !this.isXTurn;
         }
     }