I thought of that, but the only one I found was SystemTray::Applet::CmdLine, which doesn't seem to do much of anything either. There is mention of subclassing, so maybe you're supposed to create you own subclass with the appropriate implementation, but then the utility of the meagre and restrictive interface is questionable.

Seems I looked in the worng place. I should have clicked your link.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
"I'd rather go naked than blow up my ass"

In reply to Re^3: Running a SystemTray::Applet with a callback in infinite loop by BrowserUk
in thread Running a SystemTray::Applet with a callback in infinite loop by initself

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