helloo. Can someone explain please, when an NSView's call -drawRect
(being called manually - not by a framework) actually initiates
redrawing of the frame and displaying everything that it had drawn,
and when this call "doesn't initiate a thing"?

in some Apple samples is see that often to display a movie (a set of
frames) onto the view this method is being called manually from the
display link that is a part of NSView.

When i am calling [myCustomView drawRect:NSZeroRect] from somewhere
else than NSView's subclass' implementation code (a display link is
not located inside NSView's subclass implementation) it doesn't work.
I am obliged to use [myCustomView setNeedsDisplay:YES] which requires
adding synchronization and the code becomes kind of messy.

Is there a way to call drawRect and make sure the view actually redraws itself?
Thanks.
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