> > I mentioned somewhere in one of my replies that you know when it?s being run > in the System Prefs preview because isPreview is passed to the main entry > point. > >
I am not interested in detecting whether or not my screensaver is running in
System Prefs preview.
I am interested in the *screen* on which I am running, irrespective of whether
it's inside System Prefs or as a fullscreen screensaver.
Best regards, Gabriel
>> On Dec 11, 2022, at 14:56, Gabriel Zachmann via Cocoa-dev
>> <cocoa-dev@lists.apple.com> wrote:
>>
>> ?Thanks again for the responses. And sorry for following up so much later.
>> (a bit of context is recapped below)
>>
>> First of all, thanks for the hint to viewDidMoveToWindow.
>>
>> So, currently , I do this in my viewDidMoveToWindow:
>>
>>
>> - (void) viewDidMoveToWindow
>> {
>> window_ = [self window];
>> NSUInteger idx_of_screen = [NSScreen.screens indexOfObject:
>> window_.screen];
>> displayID_ = [NSNumber numberWithUnsignedLong: idx_of_screen ];
>>
>>
>> On my Mac this runs fine, and I get a proper idx_of_screen/displayID_;
>>
>> However, one of my users sent me a log file, which shows that on his Mac,
>> [self window] is non-null, but indexOfObject: returns NSNotFound, in the
>> case where my screensaver is running in the preview of System Preferences.
>> (One difference between the systems is that I am still using macOS 12, while
>> he is using macOS 13.)
>>
>> I guess, there is not much I can do about it, except find some kind of
>> work-around for those cases, where this happens. Right?
>
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