Mac Tray Icon Question

[Jeremy Wood]

On Macs the tray can present black or white icons, depending on the 
color of the desktop underneath the menubar.

For example:



Most icons switch from a black icon to a white icon as needed. A few 3rd 
party app icons do not switch to a white icon against the black 
background (for ex: Evernote). And interestingly: Apple’s Airdrop icon 
(the concentric circles shaped like a sideways pacman) also appears to 
do the wrong thing too.

Is there a way in a Java desktop app to set up a tray icon that can 
toggle between white and black icons as needed?

Obviously we’d love it if this “just worked” without further 
intervention by inverting our icon, but we’d also be happy if a solution 
involved adding a PropertyChangeListener somewhere to identify the 
menubar change and we could update the tray icons ourselves.

For ex:
If I change the highlight/accent color (in “System Preferences -> 
General”), then 8 UIManager Colors change (including “textHighlight”, 
“Button.light”, etc.) as of JDK 18. As far as I can tell: there is no 
similar model to identify when the menubar changes colors.

For now we’ve made a work-around by using the Robot class to grab a 
pixel from the Apple menu icon every few seconds to determine if it’s 
light or dark.

Is there an existing way to resolve this we don’t know about?

Or if not: is anyone reading this with “author” status interested in 
helping write this up as an openjdk bug?

Regards,
  - Jeremy
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