[Pythoncard-users] I'm learning - added .rsrc awareness to 'FindFiles'

[normanwinn <nor...@on...>]

Hi,

I was having trouble getting Walkthough 3 to work. Having already posted 
I felt too guilty to admit I hadn't even got that far. I trawled the web 
for hints but didn't get anywhere. Then I played with 'FindFiles'. I 
soon wanted it to open resource files in the resource editor (no doubt 
someone will come back and tell me that was already possible). So I 
decided to see if I could add this functionality myself.

First I had to find the '.rsrc' files. To do this I just searched for:

{ 'application':{ 'type':'Application',

not elegant, but it worked.

I first found where the highlighted file was opened which was inside 
this function (only showing the part I played with):

>     def editFile(self, filename, lineno=None):
>         if filename == '':
>             return
>
>         log.debug("filename: " + filename + "  lineno: " + str(lineno))
>         # edit Python scripts with codeEditor
>         # everything else with textEditor
>         # the list of extensions and associated programs to
>         # open with should be user settable
>         if os.path.splitext(filename)[-1] in ['.py', '.pyw']:
>             program = os.path.join("..", "codeEditor", "codeEditor.pyw")
>             if not os.path.exists(program):
>                 program = os.path.join("..", "codeEditor", 
> "codeEditor.py")
>         else:
>             program = os.path.join("..", "textEditor", "textEditor.pyw")
>             if not os.path.exists(program):
>                 program = os.path.join("..", "textEditor", 
> "textEditor.py")
>         # throw an exception if textEditor can't be found?
>         log.debug('program: ' + program)


I had made a copy of the 'FindFiles' directory content and put it 
elsewhere. It took me a while to fathom the FindFiles depends on hanging 
off the 'Tools' folder to work. I then moved my copy there and started 
to get somewhere.

I tried adding a condition to so that I could operate on '.rsrc.py' 
files. The interactive shell is a great tool for learning. I imported 
'os' and worked out what 'os.path.splitext' does. I copied a path and 
assigned it to a variable (still in the shell) and finally found that:

os.path.splitext(filename)[0][-5:]

gave me the '.rsrc' I was trying for.

I was not successful at getting the resource editor to run so I tried 
assigning the above to a variable and just to show it with a 'print'. 
Evidently, this produced an error.

I saw all those 'log.debug' lines so went about finding which of the 
imported modules it came from. Once I found it I imported this in the 
shell and looked for help on how 'log' worked. Nice and simple, so I put:

log.enable()

in  the function 'on_initialize' and I had log information pouring out 
to me in the shell.

This told me that I was extracting the right string. I then divined my 
error. I was using 'is' instead of '==' to test my string. I changed it 
and it worked. I felt real proud of myself when the resource editor 
opened up.

So, if anyone is interested here is what those lines above became:

>     def editFile(self, filename, lineno=None):
>         if filename == '':
>             return
>
>         log.debug("filename: " + filename + "  lineno: " + str(lineno))
>         # edit Python scripts with codeEditor
>         # everything else with textEditor
>         # the list of extensions and associated programs to
>         # open with should be user settable
>         rsrcFile = os.path.splitext(filename)[0][-5:]
>         log.debug('rsrcFile: ' + rsrcFile)
>         if rsrcFile == '.rsrc':
>             program = os.path.join("..", "resourceEditor", 
> "resourceEditor.py")
>             if not os.path.exists(program):
>                 program = os.path.join("..", "resourceEditor", 
> "resourceEditor.py")
>         else:
>             if os.path.splitext(filename)[-1] in ['.px', '.pyx']:
>                 program = os.path.join("..", "codeEditor", 
> "codeEditor.pyw")
>                 if not os.path.exists(program):
>                     program = os.path.join("..", "codeEditor", 
> "codeEditor.py")
>             else:
>                 program = os.path.join("..", "textEditor", 
> "textEditor.pyw")
>                 if not os.path.exists(program):
>                     program = os.path.join("..", "textEditor", 
> "textEditor.py")


I realise that using a variable to get my string is not very elegant but 
I did it that way to isolate my error.

I am relating this partly as one test I have set myself is to see if I 
can learn PythonCard and Python 'top down'. I learnt Object Pascal in 
Delphi that way and had thought it would not be possible. Seems I am wrong,

Norman

PS I still can't get the child window to open. My script runs OK but as 
soon as I hit 'Increment' or 'Decrement' I get