Re: [Pyobjc-dev] import Quartz in 10.5 Xcode Project headache

[Orestis M. <or...@or...>]

On 2 Feb 2010, at 21:14, Chris Bonhage wrote:

> I'm trying to use Quartz in my Xcode template-based PyObjC application  
> to do a window shake animation; everything works great in Snow  
> Leopard. When I go about testing it on Leopard systems, some bad stuff  
> happens at application launch, the dock icon bounces continuously, and  
> the console barfs up this nonsense before quieting down and doing  
> nothing at all:
> 
> _RegisterApplication(), FAILED TO establish the default connection to  
> the WindowServer, _CGSDefaultConnection() is NULL.
> *** -[NSRecursiveLock unlock]: lock (<NSRecursiveLock: 0x1d66300>  
> '(null)') unlocked when not locked
> *** Break on _NSLockError() to debug.
> NSInternalInconsistencyException - Error (1002) creating CGSWindow
> 
> This issue doesn't occur if the import occurs after  
> AppHelper.runEventLoop() gets called, but the resulting calls to  
> Quartz don't appear to be functioning properly, as the window does not  
> shake and in fact disappears, changing its frame to NSZeroRect for  
> every frame of the key-animation.
> 
> I've tested this import issue on a clean Xcode project from the  
> template and it occurs, but the internets at large have little to say  
> about the matter outside of the py2app realm. Any thoughts/ 
> workarounds? The fact that this works just fine on Snow Leopard leads  
> me to believe that this is a bug with PyObjC in Leopard, but I really  
> hope not.

This is a known issue, though I've no idea whose bug it is. 

The workaround is to put any Quartz-related imports in a place where they are reached *after* the application launches,
such as applicationDidFinishLaunching_. If you're doing a lot of work you might move them to an external file to make life easier.

Orestis

> 
> ------------------------------------------------------------------------------
> The Planet: dedicated and managed hosting, cloud storage, colocation
> Stay online with enterprise data centers and the best network in the business
> Choose flexible plans and management services without long-term contracts
> Personal 24x7 support from experience hosting pros just a phone call away.
> http://p.sf.net/sfu/theplanet-com
> _______________________________________________
> Pyobjc-dev mailing list
> Pyo...@li...
> https://lists.sourceforge.net/lists/listinfo/pyobjc-dev