Made entries double-clickable when choosing budget

src/main/java/no/ntnu/idatt1002/demo/controller/SelectBudgetController.java

@@ -4,16 +4,21 @@ import java.io.IOException;
 import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
 import javafx.event.ActionEvent;
+import javafx.event.Event;
 import javafx.fxml.FXML;
 import javafx.scene.Node;
+import javafx.scene.control.Alert;
+import javafx.scene.control.Alert.AlertType;
 import javafx.scene.control.Button;
 import javafx.scene.control.Label;
 import javafx.scene.control.ListView;
 import javafx.scene.input.MouseButton;
+import javafx.scene.input.MouseEvent;
 import javafx.stage.Stage;
 import no.ntnu.idatt1002.demo.data.Budget.BudgetRegister;
 import no.ntnu.idatt1002.demo.data.Budget.FileHandlingBudgetArchive;
 import no.ntnu.idatt1002.demo.data.Budget.FileHandlingSelectedBudget;
+import no.ntnu.idatt1002.demo.data.Economics.ExpenseCategory;
 
 /**
  * Class for selecting a budget from the archive.
@@ -34,10 +39,14 @@ public class SelectBudgetController {
 
   private BudgetRegister budgetRegister;
 
-  private ObservableList<String> budgetList;
-
+  /**
+   * Initializes the view when it is loaded. Prepares the view by adding event filters,
+   * instantiating the budget register and setting the list view.
+   * @throws IOException
+   */
   @FXML
   public void initialize() throws IOException {
+    //Prevent users from choosing nothing
     okBtn.addEventFilter(
         ActionEvent.ACTION, event -> {
           if (budgetListView.getSelectionModel().getSelectedItem() == null) {
@@ -46,6 +55,7 @@ public class SelectBudgetController {
       }
     });
 
+    //Load budget register from file.
     try {
       if (FileHandlingBudgetArchive.isBudgetRegisterEmpty("budgets/Archive")) {
         budgetRegister = new BudgetRegister();
@@ -56,32 +66,68 @@ public class SelectBudgetController {
       ioe.printStackTrace();
     }
     System.out.println("budget register is: " + budgetRegister);
-    budgetList = FXCollections.observableList(budgetRegister.getBudgetNames());
+    ObservableList<String> budgetList = FXCollections.observableList(
+        budgetRegister.getBudgetNames());
     budgetListView.setItems(budgetList);
 
+    //Double clicking the entry also chooses it
     budgetListView.setOnMouseClicked(mouseEvent-> {
           if(mouseEvent.getButton().equals(MouseButton.PRIMARY)){
             if(mouseEvent.getClickCount() == 2){
-              System.out.println("Double clicked");
+              selectBudget(mouseEvent);
             }
           }
         });
       }
 
+  /**
+   * Selects the budget in the budget list view and stores this value as
+   * the currently selected budget.
+
+   * @param event Double mouseclick or a click on the ok button.
+   */
   @FXML
-  public void selectBudget(ActionEvent event) throws IOException {
-    String name = budgetListView.getSelectionModel().getSelectedItem();
-    FileHandlingSelectedBudget.updateSelectedBudget(name, "budgets/SelectedBudget");
+  public void selectBudget(Event event) {
+    try {
+      String name = budgetListView.getSelectionModel().getSelectedItem();
+      FileHandlingSelectedBudget.updateSelectedBudget(name, "budgets/SelectedBudget");
+    } catch(IOException ioe) {
+      showErrorDialogBox(ioe.getMessage(), ioe.getMessage(), ioe.getMessage());
+    }
 
     final Node source = (Node) event.getSource();
     ((Stage) source.getScene().getWindow()).close();
   }
 
+  /**
+   * Closes the dialog box and clears the currently selected budget.
+
+   * @param event Button press on cancel button
+   */
   @FXML
-  public void exitWindow(ActionEvent event) throws IOException {
-    FileHandlingSelectedBudget.clearSelectedBudget("budgets/SelectedBudget");
+  public void exitWindow(ActionEvent event) {
+    try {
+      FileHandlingSelectedBudget.clearSelectedBudget("budgets/SelectedBudget");
+    } catch (IOException ioe) {
+      showErrorDialogBox(ioe.getMessage(), ioe.getMessage(), ioe.getMessage());
+    }
     final Node source = (Node) event.getSource();
     ((Stage) source.getScene().getWindow()).close();
   }
+
+  /**
+   * Displays an error message dialog box with a customizable title, header and content.
+
+   * @param title The dialog title.
+   * @param header The dialog header.
+   * @param content The dialog content.
+   */
+  public void showErrorDialogBox(String title, String header, String content) {
+    Alert alert = new Alert(AlertType.ERROR);
+    alert.setTitle(title);
+    alert.setHeaderText(header);
+    alert.setContentText(content);
+    alert.showAndWait();
+  }
 }