How can a transparent stage have round corners and drop shadow?

Question

Hi,
This is actually 2 questions:
1- How can a transparent stage have background corners?
I've tried doing this:
.rootPane
-fx-border-radius: 4 4 4 4;
-fx-background-radius: 4 4 4 4;
-fx-border-color: gray;
-fx-border-style: solid;
-fx-border-width: 1;
-fx-background-image: url("resource/clean_textile.png");
And make the root of the scene have the ".rootPane" style class.
But it sometimes shows some visual artifacts on the corners. Am I doing it wrong? is this a bug?
2 - How can a transparent stage show the windows 7 drop shadow effect of windows? Is it possible?

Answer 1

How can a transparent stage have background corners?Yes, this is a possible.
There are a few of tricks and you need all of them:
1. StageStyle must be transparent:
new Stage(StageStyle.TRANSPARENT);2. Scene fill must also be transparent:
new Scene(root, Color.TRANSPARENT);3. Color the background:
-fx-background-color: derive(cadetblue, -20%); 4. You need to apply the dropshadow effect to the background region.
-fx-effect: dropshadow(three-pass-box, derive(cadetblue, -20%), 10, 0, 4, 4); 5. You need to inset the background in the region which has the dropshadow so that the shadow will be visible within the Stage and not clipped out of the stage bounds.
-fx-background-insets: 12; 6. You need to apply a radius to the background to round it's corners.
-fx-background-radius: 6;Here is a sample in this gist revision =>
https://gist.github.com/1887631/155d5e052b6ec7d0eaa6f825713f98f8e542152e
How can a transparent stage show the windows 7 drop shadow effect of windows? Is it possible?You can kind of approximate it using the above techniques, but I don't think you will be able to get an exact match without something like: http://javafx-jira.kenai.com/browse/RT-18936 "Enable aero-style glass transparencies" (and probably additional JavaFX platform support as well) being implemented.