Re: Newbie Question: Controls not redrawing on changes

FROM : Christopher Kempke
DATE : Sun May 04 11:19:16 2008

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_removed>> 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
>