Creating two views for one window with cocoa

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Rdiger Sonderfeld - 26 Nov 2005 13:02 GMT

hi,
I have a window (windowA) and I want to create a window (windowB) that shows
the same content as windowA and is live-updated. I think Mac OS X Expose does
something like that.

I tried to use contentView:

[windowB setContentView:[windowA contentView]];

But that destroys the view of windowA.

Is there a way to link two views together?

Regards,
Rüdiger Sonderfeld <kingruedi@c-plusplus.de>

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David Phillip Oster - 26 Nov 2005 16:30 GMT

> I have a window (windowA) and I want to create a window (windowB) that shows
> the same content as windowA and is live-updated. I think Mac OS X Expose does
[quoted text clipped - 7 lines]
>
> Is there a way to link two views together?

Normally, your controller keeps a reference to the model, and an array
of all the currently existing views. When the model changes, it notifies
the controller, which determines for each view, how much of that view
needs to be refreshed (default: all). A single user command may cause
many calls to refreshRect:, then, at the end of the event, Cocoa will
call the drawRect: method of each view that needs redrawing.

See:
The Model-View-Controller (MVC) Paradigm
<http://developer.apple.com/documentation/Cocoa/Conceptual/ObjCTutorial/c
hapter02/chapter_2_section_3.html>

for more information.

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Mac Forum / Programming / Mac Programming / November 2005

Creating two views for one window with cocoa