rubycocoa-talk

[Rubycocoa-talk] Undefined constants?

[Dave H. <gr...@gr...>]

I'm trying to put images on an otherwise blank screen. The following  
code should do that, however, it errors out with "uninitialized  
constant OSX::NScreenSaverWindowLevel" if the two lines that are  
commented out are enabled.

class PictureDisplay < OSX::NSWindowController
	def init()
		screenRect = OSX::NSScreen.screens.objectAtIndex(0).frame
		mainWindow = OSX::NSWindow.alloc
		displayScreen = OSX::NSScreen.screens.objectAtIndex(0)
		windowMask = OSX::NSBorderlessWindowMask
		windowBacking = OSX::NSBackingStoreRetained
		 
mainWindow.initWithContentRect_styleMask_backing_defer_screen(screenRect 
, windowMask, windowBacking, nil, displayScreen)
		#windowLevel = (OSX::NSWindow::NScreenSaverWindowLevel) # this fails
		#mainWindow.setLevel(windowLevel)
		mainWindow.setBackgroundColor(OSX::NSColor.blackColor)
		mainWindow.makeKeyAndOrderFront_
		return self
	end
end
	
How do I get those constants defined?

Re: [Rubycocoa-talk] Undefined constants?

[Jonathan P. <jp...@dc...>]

On 22 Sep 2005, at 1:21, Dave Howell wrote:

> I'm trying to put images on an otherwise blank screen. The  
> following code should do that, however, it errors out with  
> "uninitialized constant OSX::NScreenSaverWindowLevel" if the two  
> lines that are commented out are enabled.
>
>         #windowLevel = (OSX::NSWindow::NScreenSaverWindowLevel) #  
> this fails
>
> How do I get those constants defined?

(1) Reference OSX:: directly rather than OSX::NSWindow::
(2) Spell NSScreenSaverWindowLevel correctly :)

     NScreenSaverWindowLevel
vs.
     NSScreenSaverWindowLevel

Re: [Rubycocoa-talk] Undefined constants?

[kimura w. <ki...@us...>]

Hi,

Thu, 22 Sep 2005 11:23:01 +0100, Jonathan Paisley wrote:
>On 22 Sep 2005, at 1:21, Dave Howell wrote:
>
>> I'm trying to put images on an otherwise blank screen. The  
>> following code should do that, however, it errors out with  
>> "uninitialized constant OSX::NScreenSaverWindowLevel" if the two  
>> lines that are commented out are enabled.
>>
>>         #windowLevel = (OSX::NSWindow::NScreenSaverWindowLevel) #  
>> this fails
>>
>> How do I get those constants defined?
>
>(1) Reference OSX:: directly rather than OSX::NSWindow::
>(2) Spell NSScreenSaverWindowLevel correctly :)
>
>     NScreenSaverWindowLevel
>vs.
>     NSScreenSaverWindowLevel
>
>

and..  The version 0.4.1 or earlier does not support constants about 
WindowLevel for a technical reason. The constants are available in
CVS later 2005-07-16.


-- 
kimura wataru

Re: [Rubycocoa-talk] Undefined constants?

[Jonathan P. <jp...@dc...>]

>>
>> (1) Reference OSX:: directly rather than OSX::NSWindow::
>> (2) Spell NSScreenSaverWindowLevel correctly :)
>>
>>     NScreenSaverWindowLevel
>> vs.
>>     NSScreenSaverWindowLevel
>
> and..  The version 0.4.1 or earlier does not support constants about
> WindowLevel for a technical reason. The constants are available in
> CVS later 2005-07-16.

Ah - my apologies for not checking this. I found the constant in my  
rubycocoa, but I'm running the CVS version so didn't think that it  
might not have been there before.

Re: [Rubycocoa-talk] Undefined constants?

[Dave H. <gr...@gr...>]

On Sep 22, 2005, at 7:21, Jonathan Paisley wrote:
> Ah - my apologies for not checking this. I found the constant in my 
> rubycocoa, but I'm running the CVS version so didn't think that it 
> might not have been there before.

A solution proposed for a different problem I was having was to 
"install darwinports." For this one, will only upgrading via CVS get me 
the version that has the constants defined? And to what, exactly, would 
I be upgrading to?

Re: [Rubycocoa-talk] Undefined constants?

[Jonathan P. <jp...@dc...>]

On 22 Sep 2005, at 20:09, Dave Howell wrote:

> On Sep 22, 2005, at 7:21, Jonathan Paisley wrote:
>
>> Ah - my apologies for not checking this. I found the constant in  
>> my rubycocoa, but I'm running the CVS version so didn't think that  
>> it might not have been there before.
>>
>
> A solution proposed for a different problem I was having was to  
> "install darwinports." For this one, will only upgrading via CVS  
> get me the version that has the constants defined? And to what,  
> exactly, would I be upgrading to?

The 0.4.1 release of RubyCocoa does not have the constants. No newer  
version has yet been released. The 'CVS' version refers to whatever  
is the latest code changes made by the developers and committed to  
the CVS system (see, for example [1] and [2] to find out more about  
what CVS is).

Releases are generally made when developers feel the updates made to  
the code are ready for public consumption. This means that the  
current CVS version may contain bugs or other unexpected behaviour.  
However, it's the only way to get newer features before they're given  
a versioned (e.g., 0.4.2) release.

In summary: the CVS version is likely to contain more features and  
also bugfixes against 0.4.1, but may also introduce other bugs that  
may come to bite you.

A temporary work-around would be to give the actual value for the  
constant. For example, NSScreenSaverWindowLevel is 1000. However,  
these 'constants' are defined in such a way by Mac OS X that they are  
derived at run-time (this is the reason that 0.4.1 doesn't support  
them), so it's not something to be relied upon long-term.

Jonathan


[1] http://www.nongnu.org/cvs/
[2] http://cvsbook.red-bean.com/cvsbook.html#Introduction