Is it possible to prevent my app from "Hiding"

General
1

Is there any way to prevent my app from hiding, when the user selects the menu item “Hide others” within another app e.g. the Finder?

Maybe anything in “MacOSLib”…

2

I’m also searching for this. It turns out that an application with LSUIElement can be hidden (quite easily: press command-H while the app is active) and there’s no easy way to show it again (easiest way is to open the app again, meaning searching the bundle).
I think preventing hiding an LSUIElement app should be a minimum.

In the MBS plugin’s documentation, I’m reading we can receive a notification when the app will go hidden, but it’s not mentioned in which of the various notifications classes it would happen nor whether it is cancellable.
Idea, please?

3

I think what you want is [NSWindow canHide:NO].

The value of this property is YES if the window can hide when its application becomes hidden (during execution of the NSApplication hide: method); otherwise, NO. By default, the value of the property is YES.

You should be able to do this with a simple declare, I’ve just wrote out the below into this forum without testing, but even if it doesn’t work, it should be close.

declare sub NSWindow_canHide lib "AppKit" selector "setCanHide:" ( NSWindowInstance as integer, value as boolean ) // Mac OS X 10.0 + or newer

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4

Thank you, this works perfectly. Much appreciated.
I just changed integer to ptr to pass the window’s handle.

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