Javafx exits fullscreen after showing dialog - javafx

Question

When I show a dialog, full screen mode exits always. I have checked code in Windows, Linux and Mac OS. All gives same result. How to prevent exiting fullscreen. Please help me to resolve this.
If this wont works I have to change platform javafx to some other technology to do my project :(
public class JavaFxFullScreen extends Application {
#Override
public void start(Stage primaryStage) {
Button btn = new Button();
btn.setText("Say 'Hello World'");
btn.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
showAlert();
}
});
StackPane root = new StackPane();
root.getChildren().add(btn);
Scene scene = new Scene(root, 300, 250);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.setFullScreen(true);
primaryStage.show();
}
public void showAlert() {
Alert alert = new Alert(Alert.AlertType.INFORMATION);
alert.setTitle("Information Dialog");
alert.setHeaderText("Look, an Information Dialog");
alert.setContentText("I have a great message for you!");
alert.showAndWait();
}
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}}

Answer 1

You need set the owner of the Alert to the primary stage of your application.
public void showAlert(Stage owner) {
Alert alert = new Alert(Alert.AlertType.INFORMATION);
alert.setTitle("Information Dialog");
alert.setHeaderText("Look, an Information Dialog");
alert.setContentText("I have a great message for you!");
alert.initOwner(owner); // This sets the owner of this Dialog
alert.showAndWait();
}
Then pass a reference to your primary Stage when you want to show your Alert.
public void start(Stage primaryStage) {
Button btn = new Button();
btn.setText("Say 'Hello World'");
btn.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
showAlert(primaryStage);
}
});
StackPane root = new StackPane();
root.getChildren().add(btn);
Scene scene = new Scene(root, 300, 250);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.setFullScreen(true);
primaryStage.show();
}

Answer 2

Are you willing to try ControlsFX Notifications?
import javafx.application.Application;
import static javafx.application.Application.launch;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import org.controlsfx.control.Notifications;
public class JavaFXFullScreen extends Application
{
#Override
public void start(Stage primaryStage)
{
Button btn = new Button();
btn.setText("Say 'Hello World'");
btn.setOnAction(new EventHandler<ActionEvent>()
{
#Override
public void handle(ActionEvent event)
{
showAlert();
}
});
StackPane root = new StackPane();
root.getChildren().add(btn);
Scene scene = new Scene(root, 300, 250);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.setFullScreen(true);
primaryStage.show();
}
public void showAlert()
{
Notifications.create()
.title("Information Dialog")
.text("I have a great message for you!")
.showInformation();
}
/**
* #param args the command line arguments
*/
public static void main(String[] args)
{
launch(args);
}
}