I suspect the images that work are template images, rather than pairs of images.
See https://developer.apple.com/documentation/appkit/nsimage/1520017-template > On Aug 9, 2022, at 7:12 PM, Jeremy Wood <[email protected]> wrote: > > On Macs the tray can present black or white icons, depending on the color of > the desktop underneath the menubar. > > For example: > > <galpmnvf.png> > > <qtqoidmn.png> > > 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
