import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.CheckBox;
import javafx.scene.control.ComboBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.stage.WindowEvent;

public class ShowAndWaitHang2 extends Application {

    private int eventNestinglevel = 0;

    @Override
    public void start(Stage stage) {
        final CheckBox showAndWaitCheckBox = new CheckBox("Use showAndWait");
        showAndWaitCheckBox.setSelected(true);

        final CheckBox onActionCheckBox = new CheckBox("Create stage in ComboBox onAction");
        onActionCheckBox.setSelected(true);

        final CheckBox windowOnCloseCheckBox = new CheckBox("Create stage in Window onCloseRequest");

        stage.setOnCloseRequest(new EventHandler<WindowEvent>() {
            public void handle(WindowEvent e) {
                if (windowOnCloseCheckBox.isSelected()) {
                    Thread.dumpStack();
                    Stage newStage = new Stage();
                    if (showAndWaitCheckBox.isSelected()) {
                        newStage.showAndWait();
                    } else {
                        newStage.show();
                    }
                }
                System.err.println("Stage onCloseRequest exit");
            }
        });

        final Button newStageButton = new Button("New Stage");
        newStageButton.setOnAction(new EventHandler<ActionEvent>() {
            public void handle(ActionEvent e) {
                Thread.dumpStack();
                Stage newStage = new Stage();
                if (showAndWaitCheckBox.isSelected()) {
                    newStage.showAndWait();
                } else {
                    newStage.show();
                }
                System.err.println("Button onAction exit");
            }
        });

        final ComboBox<String> comboBox = new ComboBox<String>();
        comboBox.getItems().add("Item 1");
        comboBox.getItems().add("Item 2");
        comboBox.getItems().add("Item 3");
        comboBox.setEditable(true);
        comboBox.setOnAction(new EventHandler<ActionEvent>() {
            public void handle(ActionEvent e) {
                if (eventNestinglevel != 0) {
                    System.err.println("***** eventNestinglevel = " + eventNestinglevel);
                }
                ++eventNestinglevel;
                if (onActionCheckBox.isSelected()) {
                    Thread.dumpStack();
                    Stage newStage = new Stage();
                    if (showAndWaitCheckBox.isSelected()) {
                        newStage.showAndWait();
                    } else {
                        newStage.show();
                    }
                }
                --eventNestinglevel;
                System.err.println("ComboBox onAction exit");
            }
        });

        VBox root = new VBox(10);
        root.getChildren().addAll(
                showAndWaitCheckBox,
                onActionCheckBox,
                windowOnCloseCheckBox,
                newStageButton,
                comboBox);
        stage.setScene(new Scene(root, 600, 400));
        stage.show();
    }

    public static void main(String[] args) {
        Application.launch(args);
    }
}