JavaFx add Window-Control-Buttons to Menubar (IntelliJ like) - javafx

Question

Since IntelliJ version 2019.2 Jetbrains removed the titlebar from the IDE and put the minimize, maximize and close button of the window into the menubar. So far, I have not found out how to do so using javafx. Is there a way to instanciate a "WindowControlButtons"-Class, so I can easily add them to the menubar or do I have to add a buttongroup and style the buttons for each platform myself?
Example how it shall look like on Windows:

Answer 1

As suggested by #mr mcwolf You can try below solution.
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.control.MenuItem;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Priority;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
public class JavaFXApplication1 extends Application {
#Override
public void start(Stage primaryStage) {
Button closeButton = new Button();
closeButton.setText("X");
closeButton.setOnAction((ActionEvent event) -> {
javafx.application.Platform.exit();
});
Button hideButton = new Button();
hideButton.setText("-");
hideButton.setOnAction((ActionEvent event) -> {
primaryStage.setIconified(true);
});
Menu menu = new Menu("Menu");
MenuItem menuItem1 = new MenuItem("item 1");
MenuItem menuItem2 = new MenuItem("item 2");
menu.getItems().add(menuItem1);
menu.getItems().add(menuItem2);
MenuBar menuBar = new MenuBar();
menuBar.getMenus().add(menu);
HBox hBox = new HBox(menuBar, hideButton, closeButton);
HBox.setHgrow(menuBar, Priority.ALWAYS);
HBox.setHgrow(hideButton, Priority.NEVER);
HBox.setHgrow(closeButton, Priority.NEVER);
BorderPane root = new BorderPane();
root.setTop(hBox);
Scene scene = new Scene(root, 300, 250);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.initStyle(StageStyle.UNDECORATED);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
Output on Windows looks like this.