I recently started a JavaFX project, and I've a problem with a JDialog Swing modal dialog in my application. I've a JDesktopPane in which I've drawed a graph using a Javafx JFXPanel. The JDesktopPane also have a popmenu, using the popumenu I've launch a modal Jdialog. The Jdialog have a setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);

The problem is when I close Jdialog window via x in the upper right corner o via this.dispose(), whole program terminates as if I was closing the main window.

The problem arise under Linux, but under Windows it's work correctly.

Someone can help me ?