JavaFX: can you create a stage that doesn't show on the task bar and is undecorated?

Question

I\'m trying to create a stage that doesn\'t appear on the Windows task bar and is undecorated (no borders and no close/minimize/maximize buttons). My end goal is to create a

Answer 1

This question is not really fresh, but I had the same problem and found no solution at first, but here is my workaround :)

The best solution I found was to set the primaryStage to style Utility and to make all childStages to Style Undecorated. Then set the opacity of the primaryStage to 0.0 so its not visible: PrimaryStage:

primaryStage.initStyle(StageStyle.UTILITY);
primaryStage.setOpacity(0);
primaryStage.show();

Childs:

this.initOwner(owner);
this.initStyle(StageStyle.UNDECORATED);

Example code

public void start(Stage primaryStage) throws IOException{
    //make primaryStage utility
    primaryStage.initStyle(StageStyle.UTILITY);
    primaryStage.setOpacity(0);

    Stage secondaryStage = new Stage();
    secondaryStage.initOwner(primaryStage);
    //make secondaryStage transparent
    secondaryStage.initStyle(StageStyle.TRANSPARENT);


    //load ui via FXMLLoader
    FXMLLoader loader = new FXMLLoader(getClass().getResource("/ui.fxml"));
    AnchorPane pane = loader.load();//example with anchor pane

    Scene scene = new Scene(pane,400,400); //example width and height
    scene.setFill(Color.TRANSPARENT); //make scene transparent as well

    secondaryStage.setScene(scene);

    primaryStage.show();
    secondaryStage.show();
}