javafx transparent window background with decorations

Question

I\'m having a hard time figuring out how to make a transparent background for an application window in javafx. scene.setFill(null) seems to only work with

Answer 1

I've been tinkering with similar settings, and this works for me:

  @Override
   public void start(Stage primaryStage) throws Exception{
      Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));

      primaryStage.setTitle("Hello World");
      primaryStage.initStyle(StageStyle.TRANSPARENT);
      primaryStage.setOpacity(0.5);
      primaryStage.setFullScreen(true);
      Scene scene = new Scene(root, 300, 275);
      primaryStage.setScene(scene);
      scene.getStylesheets().add(Main.class.getResource("main.css")
            .toExternalForm());
      primaryStage.show();
}

...and the css

.root {
    -fx-background-color: rgba(0,0,0,0.5); 
}

Answer 2

You can use this library. It is a fully customizable JavaFx Stage (CustomStage). You can see in-detail description of how to use it in this CustomStage Wiki

It has,

• Window resizing
• Default action buttons and their behaviour (close, maximize/restore, minimize)
• Window dragging
• Window is automatically scaled as for screen resolution
• Very responsive
• Stylable
• Can achieve transparency
• Has in-built navigation panes and drawers
• etc.