[Pyobjc-dev] Re: PyShellView?

[Michael H. <mw...@py...>]

From a while's back: I've now got around to trying to implement the
PyShellView, and as usual with Cocoa it seems to be laughably easy.

With appropriate swiping of code from IDLE, I expect to be able to get
colorization, completion and history all going fairly easily.

One problem, though:

Dinu Gherman <gh...@da...> writes:

> I wrote:
>
>> Sounds good to me! You may want to sniff into the following maybe:
>>
>>    http://developer.apple.com/samplecode/Sample_Code/Cocoa/
>> TextViewDelegate.htm
>>
>> Have fun,
>
> Big fun, indeed!! The following conversion to PyObjC using an outlet
> named 'committedLength' of type id in IB just crashes:
>
> #------------------------------------------------------------------
> #
> #  MyAppDelegate.py
> #  PyTextViewDelegate
> #
>
> from objc import YES, NO
> from Foundation import NSObject
> from AppKit import NSColor, NSApplicationDelegate
> from PyObjCTools import NibClassBuilder
>
> # create ObjC classes as defined in MainMenu.nib
> NibClassBuilder.extractClasses("MainMenu")
>
>
> class MyAppDelegate(NibClassBuilder.AutoBaseClass,
> NSApplicationDelegate):
>
>      def awakeFromNib(self):
>          "Set our committedLength outlet to the right start value."
>
>          self.committedLength = 0
>
>
>      def textView_shouldChangeTextInRange_replacementString_(self,
>              textView, charRange, replString):
>          "Allow editing only after the previously committed text."
>
>          return charRange[0] >= self.committedLength

If I implement this delgate method and press "backspace" in the text
view, I get a core dump deep in Scary Internals Land.  I've not got
the latest PyObjC on my laptop, and my laptop is at home so I can't
update, but does this sound familiar to anyone?  Might it be cured by
a new libffi (for example)?

Cheers,
mwh

-- 
  If you're talking "useful", I'm not your bot.
                                            -- Tim Peters, 08 Nov 2001