implement the start page

src/main/java/at/ionas999/questioncatalog/App.java

@@ -8,9 +8,10 @@ import javafx.stage.Stage;
 import java.io.IOException;
 
 public class App extends Application {
+    // Der gesamte fxml code wurde mithilfe des Github Copilotes generiert
     @Override
     public void start(Stage stage) throws IOException {
-        FXMLLoader fxmlLoader = new FXMLLoader(App.class.getResource("answerText.fxml"));
+        FXMLLoader fxmlLoader = new FXMLLoader(App.class.getResource("main.fxml"));
         Scene scene = new Scene(fxmlLoader.load(), 320, 240);
         stage.setTitle("Question Catalog");
         stage.setScene(scene);

src/main/java/at/ionas999/questioncatalog/Utils.java

@@ -0,0 +1,23 @@
+package at.ionas999.questioncatalog;
+
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Parent;
+import javafx.scene.Scene;
+import javafx.stage.Stage;
+
+import javafx.event.ActionEvent;
+import java.io.IOException;
+
+public class Utils {
+    public static void switchScenes(String fxmlFileName, Stage stage) throws IOException {
+
+        FXMLLoader fxmlLoader = new FXMLLoader(App.class.getResource(fxmlFileName));
+        Parent root = fxmlLoader.load();
+        stage.setScene(new Scene(root));
+        stage.show();
+    }
+
+    public static Stage getStageFromActionEven(ActionEvent actionEvent){
+        return (Stage) ((javafx.scene.Node) actionEvent.getSource()).getScene().getWindow();
+    }
+}

src/main/java/at/ionas999/questioncatalog/controller/MainController.java

@@ -1,4 +1,34 @@
 package at.ionas999.questioncatalog.controller;
 
+import at.ionas999.questioncatalog.Utils;
+import javafx.event.ActionEvent;
+import javafx.fxml.FXML;
+import javafx.stage.Stage;
+
+import java.io.IOException;
+
 public class MainController {
+    @FXML
+    private void addNewBtnClick(ActionEvent actionEvent) throws IOException {
+        Stage stage = Utils.getStageFromActionEven(actionEvent);
+        Utils.switchScenes("upload.fxml", stage);
+    }
+
+    @FXML
+    private void viewBtnClick(ActionEvent actionEvent) throws IOException {
+        Stage stage = Utils.getStageFromActionEven(actionEvent);
+        Utils.switchScenes("view.fxml", stage);
+    }
+
+    @FXML
+    private void learnBtnClick(ActionEvent actionEvent) throws IOException {
+        Stage stage = Utils.getStageFromActionEven(actionEvent);
+        Utils.switchScenes("answerText.fxml", stage);
+    }
+
+    @FXML
+    private void testBtnClick(ActionEvent actionEvent) throws IOException {
+        Stage stage = Utils.getStageFromActionEven(actionEvent);
+        Utils.switchScenes("answerText.fxml", stage);
+    }
 }

src/main/java/module-info.java

@@ -1,6 +1,7 @@
 module at.ionas999.questioncatalog {
     requires javafx.controls;
     requires javafx.fxml;
+    requires java.desktop;
 
     opens at.ionas999.questioncatalog to javafx.fxml;
     opens at.ionas999.questioncatalog.controller to javafx.fxml; // Add this line

src/main/resources/at/ionas999/questioncatalog/main.fxml

@@ -1,16 +1,18 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
-<?import javafx.geometry.Insets?>
 <?import javafx.scene.control.Button?>
 <?import javafx.scene.control.Label?>
 <?import javafx.scene.layout.VBox?>
 
-<VBox alignment="CENTER" spacing="20.0" xmlns:fx="http://javafx.com/fxml">
+<VBox alignment="CENTER" spacing="20.0"
+      xmlns="http://javafx.com/javafx"
+      xmlns:fx="http://javafx.com/fxml"
+      fx:controller="at.ionas999.questioncatalog.controller.MainController">
     <Label text="Question Catalog" style="-fx-font-size: 24px; -fx-font-weight: bold;" />
     <VBox spacing="10.0" alignment="CENTER">
-        <Button text="Add New" prefWidth="150" />
+        <Button text="Add New" onAction="#addNewBtnClick" prefWidth="150" />
-        <Button text="View" prefWidth="149" />
+        <Button text="View" onAction="#viewBtnClick" prefWidth="149" />
-        <Button text="Learn" prefWidth="150" />
+        <Button text="Learn" onAction="#learnBtnClick" prefWidth="150" />
-        <Button text="Test" prefWidth="150" />
+        <Button text="Test" onAction="#testBtnClick" prefWidth="150" />
     </VBox>
 </VBox>