Re: LayoutEditor trouble on Mac?

Aaron Stevens <[email protected]> Sun, 12 Oct 2008 13:50:16 -0400

Newsgroups	gmane.comp.python.pythoncard
Message-ID	<[email protected]>

Neil,

Yes, that's the error I got. I'm attaching the stack trace.
I got effectively the same stack trace from running Resource Editor,  
and the same drawing issue.

-Aaron




On Oct 12, 2008, at 5:57 AM, Neil Hughes wrote:

> On Thu, 9 Oct 2008 17:54:09 -0400 Aaron Stevens <[email protected]> wrote:
>
>> No, I never worked it out. I run Windows XP under Parallels Desktop,
>> so I just gave up and used the windows versions of LayoutEditor.
>> I'd love to see a solution if you can work it out!
>
> Well....it looks like the same nested device context limit that is  
> causing the problem with the BitmapCanvas component is also causing  
> the problem with the LayoutEditor. I don't see any error under  
> Windows XP so I guess this limitation has been deliberately  
> restricted to OSX.
>
> Aaron....or anybody running 10.5 (I only have Tiger here, so I hope  
> it's the same cause)....if you run the LayoutEditor from the command  
> line or set the Python launcher to show all error messages in a  
> terminal window, and then load the widgets example, when the window  
> is only partly drawn do you see the stack trace ending with the  
> error about "Cannot nest wxDCs on the same window"?
>
> Also, is anybody seeing the same visible issue in the Resource  
> Editor....where only a part of the window is showing? I just see it  
> in the LayoutEditor but I get the stack trace in both.
>
> I've been able to hack the editor code to stop this and get all of  
> the components showing but I haven't tested it back on my Windows  
> box to see if it breaks anything...and I can't understand why I'm  
> not seeing the same visible issue in the ResourceEditor....just an  
> error message.
>
> -- 
> Neil Hughes
>

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stacktrace.txt (text/plain, 3.8 KB)

azs-laptop:resourceEditor azs$ python layoutEditor.py 
Sun Oct 12 13:47:42 azs-laptop.home Python[51521] <Error>: CGContextConcatCTM: invalid context
Sun Oct 12 13:47:42 azs-laptop.home Python[51521] <Error>: CGContextSaveGState: invalid context
Sun Oct 12 13:47:42 azs-laptop.home Python[51521] <Error>: doClip: invalid context
Sun Oct 12 13:47:42 azs-laptop.home Python[51521] <Error>: CGContextSaveGState: invalid context
Sun Oct 12 13:47:42 azs-laptop.home Python[51521] <Error>: CGContextSetBlendMode: invalid context
Sun Oct 12 13:47:42 azs-laptop.home Python[51521] <Error>: CGContextSetShouldAntialias: invalid context
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/PythonCard/model.py", line 884, in _dispatch
    handler(background, aWxEvent)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/PythonCard/tools/resourceEditor/layoutEditor.py", line 559, in on_size
    self.createDC()
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/PythonCard/tools/resourceEditor/layoutEditor.py", line 555, in createDC
    dc.SetLogicalFunction(wx.INVERT)
  File "//Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/wx-2.8-mac-unicode/wx/_gdi.py", line 4079, in SetLogicalFunction
    return _gdi_.DC_SetLogicalFunction(*args, **kwargs)
wx._core.PyAssertionError: C++ assertion "status == noErr" failed at /BUILD/wxPython-src-2.8.3.0/src/mac/carbon/graphics.cpp(1324) in EnsureIsValid(): Cannot nest wxDCs on the same window
Sun Oct 12 13:47:42 azs-laptop.home Python[51521] <Error>: CGContextConcatCTM: invalid context
Sun Oct 12 13:47:42 azs-laptop.home Python[51521] <Error>: CGContextSaveGState: invalid context
Sun Oct 12 13:47:42 azs-laptop.home Python[51521] <Error>: doClip: invalid context
Sun Oct 12 13:47:42 azs-laptop.home Python[51521] <Error>: CGContextSaveGState: invalid context
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/PythonCard/menu.py", line 204, in _dispatch
    handler(background, aWxEvent)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/PythonCard/tools/resourceEditor/layoutEditor.py", line 1417, in on_menuFileOpen_select
    self.doOpenFile()
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/PythonCard/tools/resourceEditor/layoutEditor.py", line 1398, in doOpenFile
    self.openFile(result.paths[0])
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/PythonCard/tools/resourceEditor/layoutEditor.py", line 1387, in openFile
    self.components[w.name] = w
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/PythonCard/model.py", line 98, in __setitem__
    control = component.ComponentFactory().createComponent(self.parent, self.parent.panel, item)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/PythonCard/component.py", line 347, in createComponent
    component = clazz(aParent, aResource)
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/PythonCard/components/bitmapcanvas.py", line 103, in __init__
    self.clear()
  File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/PythonCard/components/bitmapcanvas.py", line 217, in clear
    dc.BlitPointSize((0, 0), (self._size[0], self._size[1]), self._bufImage, (0, 0))
  File "//Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/wx-2.8-mac-unicode/wx/_gdi.py", line 3385, in BlitPointSize
    return _gdi_.DC_BlitPointSize(*args, **kwargs)
wx._core.PyAssertionError: C++ assertion "status == noErr" failed at /BUILD/wxPython-src-2.8.3.0/src/mac/carbon/graphics.cpp(1324) in EnsureIsValid(): Cannot nest wxDCs on the same window