How to make a button appear to have been clicked or selected? (JavaFX2)

Question

When user presses a button in my JavaFX2.2 UI, a dark blue halo appears to show it was clicked. During the course of events, my program may want to \'unclick\' it to show it

Answer 1

From a css stylesheet this command also works. There is no need for a toggle button. Once you press a different button, focus changes to the new one.

.button:focused{
    -fx-background-color: gray;