Re: Newbie Question: Controls not redrawing on changes
Re: Newbie Question: Controls not redrawing on changes
- Subject: Re: Newbie Question: Controls not redrawing on changes
- From: Mike Abdullah <email@hidden>
- Date: Sun, 4 May 2008 11:07:07 +0100
Are you sure you're running the event loop correctly? It sounds to me
that Cocoa is not getting a chance to do its usual behaviour of
calling -displayIfNeeded at the end of the event loop. What if you
manually call that method yourself?
Mike.
On 4 May 2008, at 10:19, Christopher Kempke wrote:
Yes, it appears that I want an NSPanel instead of an NSWindow for my
modal dialogs, but I think the modality is a red herring here: I
just tried adding the same checkbox and button controls to a
floating window and a document window: they don't visibly update
based on mouse clicks there, either (although they still send
actions to their targets)
There's an [NSWindow setAutodisplay:YES] method which again looks
like it's just what I need, except that it's already turned on (I
just did it explicitly to be sure, no change). I've tried setting
the window's backing store to BackingStoreNonretained, which also
doesn't have any obvious effect.
I'm correct in my assumption that this is supposed to work, yes? If
I create a window, nest a checkbox in it's main view, and start the
main event loop, clicks in the checkbox should keep toggling the
value of the checkbox and updating the screen, right? I don't have
to do anything special to turn this on, or implement the drawing
myself?
--Christopher Kempke
On May 3, 2008, at 8:47 PM, Kyle Sluder wrote:
On Sat, May 3, 2008 at 7:08 PM, Christopher Kempke
<email@hidden> wrote:
Thanks for the tip, but no go. It actually makes the behavior
worse: now
the modal dialog is still drawn, but never becomes active (the
title bar
never gets dark, and the previously visible (document) window never
deactivates, although the dialog is drawn on top), and the default
button
doesn't even turn blue.
Take a look at -[NSPanel setWorksWhenModal:]. You should be using an
NSPanel, not an NSWindow, and must send it this message before doing
-[NSApplication runModalForWindow:]. Read this document, entitled
"How Modal Windows Work," for more information.
http://developer.apple.com/documentation/Cocoa/Conceptual/WinPanel/Concepts/UsingModalWindows.html#/
/apple_ref/doc/uid/20000223
--Kyle Sluder
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