How to choose the matching icon color for menu background

[manuel-koch]

On MacOS the color of the main menu depends sometimes on the color of the background image of the display.
Thus if you choose e.g. a solid light gray color, then standard menu entries of MacOS appear in black.
But if you choose e.g. a solid dark gray color, then the standard menu entries appear in white.

Any idea how I can adjust my systray app to achieve the same for the main icon selected via call to systray.SetIcon(...) ?
I.e. I already have one icon in black and one in white - but I don't have a trigger when to choose which ?
Is there already something similar built into systray library ?

[andydotxyz]

Does this correlate with the users chosen colour scheme (light vs dark)? In which case you can get the "variant" from App.Settings().

[manuel-koch]

I'm just using fyne.systray and AFAIK there are no app settings available there ( like in the full fyne lib ).

Additionally reading Apple Resources, they are talking about some "themed icon" that uses special black/white color with transparency that will result in automatically switching between white and black appearance in the menu, because of automatic tinting. E.g. this apple forum relates to the topic.

The issue is not just letting user select light/dark theme, the menu appears different when e.g. nightshift is enabled or the display background uses dark/light image and this can happen during runtime of the systray app.

I just found this method, which sounds like what I was looking for: systray.SetTemplateIcon().
I will give it a try.

[manuel-koch]

Ok systray.SetTemplateIcon() is the method I was searching for. If I use a black/transparent PNG, the menu icon will automatically adjust to black/white appearance in the menu bar like other standard MacOS menu items.