I've writing a macOS application with Qt. This application is a launch agent, meaning that it's launched by launchd and always running in the background. Normally the application only has a menu bar icon, and it doesn't have any open windows or a Dock icon. (i.e. the shared NSApplication instance's activationPolicy
property is set to a value of NSApplicationActivationPolicyAccessory
.)
However, there are a few menu items available in its menu bar item that open some windows, and when those windows are open the app switches to not being background-only any longer, so it will have a Dock icon and menu bar. (i.e. activationPolicy
is changed to NSApplicationActivationPolicyRegular
.) With there being a Dock icon, that means it's possible for the user to right-click it and open its menu, and that menu has its default menu item for quitting the application.
Since the app is a launch agent, though, and is intended to always be running, quitting it just causes launchd to relaunch the app. I'd like to disable or remove this menu item if possible, or otherwise prevent the user from being able to quit the app in this manner.
Is there any way to do that? If there's a way to accomplish this purely using Qt's functions that would be great, but if not it's fine for me to use macOS specific functions too.
I should add that because this is a Qt application, I can't use the same method as outlined here because I don't have access to the application's delegate. I would need to use another approach. (For example, it may be possible to swizzle methods on Qt's application delegate, though if there's a cleaner way to accomplish this than I'd much rather do that.)