Using dialog buttons instead of custom ones

src/main/java/envoy/client/ui/LoginDialog.fxml

@@ -54,19 +54,8 @@
 							visible="false" GridPane.columnIndex="1" GridPane.rowIndex="2" />
 					</children>
 				</GridPane>
-				<HBox alignment="CENTER_RIGHT" prefHeight="100.0"
+				<CheckBox fx:id="registerCheckBox" mnemonicParsing="false"
-					prefWidth="200.0">
+					onAction="#registerCheckboxChanged" text="Register" />
-					<children>
-						<CheckBox fx:id="registerCheckBox"
-							mnemonicParsing="false" onAction="#registerCheckboxChanged"
-							text="Register" />
-						<Button alignment="CENTER_RIGHT" cancelButton="true"
-							mnemonicParsing="false" onAction="#abortLogin" text="Close" />
-						<Button alignment="CENTER_RIGHT" defaultButton="true"
-							mnemonicParsing="false" text="Login"
-							onAction="#loginButtonClicked" fx:id="loginButton" />
-					</children>
-				</HBox>
 			</children>
 		</VBox>
 	</content>

src/main/java/envoy/client/ui/LoginDialog.java

@@ -17,6 +17,7 @@ import envoy.event.HandshakeRejectionEvent;
 import envoy.exception.EnvoyException;
 import envoy.util.EnvoyLog;
 import javafx.application.Platform;
+import javafx.event.ActionEvent;
 import javafx.fxml.FXML;
 import javafx.fxml.FXMLLoader;
 import javafx.scene.control.*;
@@ -47,9 +48,6 @@ public final class LoginDialog extends Dialog<Void> {
 	@FXML
 	private CheckBox registerCheckBox;
 
-	@FXML
-	private Button loginButton;
-
 	private final Client			client;
 	private final LocalDB			localDB;
 	private final Cache<Message>	receivedMessageCache;
@@ -75,27 +73,43 @@ public final class LoginDialog extends Dialog<Void> {
 
 		final var loader = new FXMLLoader(getClass().getResource("LoginDialog.fxml"));
 		loader.setController(this);
-		setDialogPane(loader.load());
+		final var dialogPane = loader.<DialogPane>load();
+
+		// Configure dialog buttons
+		dialogPane.getButtonTypes().addAll(ButtonType.CLOSE, ButtonType.OK);
+
+		// Close button
+		dialogPane.lookupButton(ButtonType.CLOSE).addEventHandler(ActionEvent.ACTION, e -> abortLogin());
+
+		// Login button
+		final var loginButton = (Button) dialogPane.lookupButton(ButtonType.OK);
+		loginButton.setText("Login");
+		loginButton.addEventFilter(ActionEvent.ACTION, e -> {
+			e.consume();
+
+			// Prevent registration with unequal passwords
+			if (registerCheckBox.isSelected() && !passwordField.getText().equals(repeatPasswordField.getText())) {
+				clearPasswordFields();
+				new Alert(AlertType.ERROR, "The entered password is unequal to the repeated one").showAndWait();
+			} else
+				performHandshake(new LoginCredentials(userTextField.getText(), passwordField.getText().toCharArray(), registerCheckBox.isSelected()));
+		});
+
+		// Perform automatic login if configured
+		setOnShown(e -> { if (config.hasLoginCredentials()) performHandshake(config.getLoginCredentials()); });
+
+		setDialogPane(dialogPane);
 	}
 
 	@FXML
 	private void initialize() {
 
-		// Close the dialog when the user exits the dialog
-		getDialogPane().getScene().getWindow().setOnCloseRequest(e -> abortLogin());
-
 		// Show an alert after an unsuccessful handshake
 		eventBus.register(HandshakeRejectionEvent.class,
 				e -> Platform.runLater(() -> { clearPasswordFields(); new Alert(AlertType.ERROR, e.get()).showAndWait(); }));
 
 		// Set initial cursor
 		userTextField.requestFocus();
-
-		// Perform automatic login if configured
-		if (config.hasLoginCredentials()) {
-			performHandshake(config.getLoginCredentials());
-			hide();
-		}
 	}
 
 	@FXML
@@ -114,22 +128,12 @@ public final class LoginDialog extends Dialog<Void> {
 		System.exit(0);
 	}
 
-	@FXML
-	private void loginButtonClicked() {
-
-		// Prevent registration with unequal passwords
-		if (registerCheckBox.isSelected() && !passwordField.getText().equals(repeatPasswordField.getText())) {
-			clearPasswordFields();
-			new Alert(AlertType.ERROR, "The entered password is unequal to the repeated one").showAndWait();
-		} else performHandshake(new LoginCredentials(userTextField.getText(), passwordField.getText().toCharArray(), registerCheckBox.isSelected()));
-	}
-
 	private void performHandshake(LoginCredentials credentials) {
 		try {
 			client.performHandshake(credentials, receivedMessageCache);
 			if (client.isOnline()) {
 				client.initReceiver(localDB, receivedMessageCache);
-				hide();
+				Platform.runLater(this::hide);
 			}
 		} catch (IOException | InterruptedException | TimeLimitExceededException e) {
 			logger.warning("Could not connect to server. Trying offline mode...");
@@ -140,10 +144,13 @@ public final class LoginDialog extends Dialog<Void> {
 				User clientUser = (User) localDB.getUsers().get(credentials.getIdentifier());
 				if (clientUser == null) throw new EnvoyException("Could not enter offline mode: user name unknown");
 				client.setSender(clientUser);
-				new Alert(AlertType.WARNING, "A connection to the server could not be established. Starting in offline mode.\n" + e).showAndWait();
+				Platform.runLater(() -> {
-				hide();
+					new Alert(AlertType.WARNING, "A connection to the server could not be established. Starting in offline mode.\n" + e)
+						.showAndWait();
+					hide();
+				});
 			} catch (Exception e1) {
-				new Alert(AlertType.ERROR, "Client error: " + e.toString()).showAndWait();
+				Platform.runLater(() -> new Alert(AlertType.ERROR, "Client error: " + e.toString()).showAndWait());
 				System.exit(1);
 			}
 		}