How to mark window close button as "unsaved"?

Question

Using SWT, you can change the main window quit/close icon/button (in upper left corner of title bar) to indicate that the file/whatever of the application has not been saved. The code to do that in SWT is something like this -
Shell shell = new Shell(new Display(), SWT.CLOSE | SWT.TITLE | SWT.BORDER | SWT.MIN);
shell.setModified(true);
Is this feature available in Java FX 2.2? If not, has there been a bug/request filed for it?

Answer 1

I had a question going in the same direction: "Is there any way to disable the close button in a decorated stage?" but from your answer to the previous question, I guess this is not possible... could you please confirm this? A workaround would be to set an event handler to consume the window close event. Looks like I'll need to go that way. Or could you suggest a better way?I don't think it's possible with to disable the button in JavaFX 2.2 - if you did, it would provide an inconsistent native windowing experience for the user anyway as I've never seen a close button on a Windows 7 app disabled.
However, as you point out, you can capture (and handle or ignore) the events if generated. You can do this by setting an onCloseRequest event handler for the window and calling event.consume() in the handler. (relevant javadoc comment):
https://docs.oracle.com/javafx/2/api/javafx/stage/Window.html#setOnCloseRequest%28javafx.event.EventHandler%29
Called when there is an external request to close this Window. The installed event handler can prevent window closing by consuming the received event.------
You could check out my related answer at StackOverflow: http://stackoverflow.com/questions/12874664/javafx-entirely-customized-windows, for some other thoughts on this on customizing decorated and undecorated windows, but I think most has already been said in this thread.