It happens only with SWT based apps (like eclipse and tuxguitar).
I've made a little app to test this on Swing and the menu is rendered in Java (so, it does not integrate to Unity). See attached screenshot.
It happens only with SWT based apps (like eclipse and tuxguitar).
I've made a little app to test this on Swing and the menu is rendered in Java (so, it does not integrate to Unity). See attached screenshot.