pyobjc-dev — CVS commit notices go here

Re: [Pyobjc-dev] Wrong spelling of tableView_objectValueForTableColumn_row_()?

[Zachery B. <zb...@ur...>]

On Wednesday, July 23, 2003, at 01:54 AM, Ronald Oussoren wrote:

> On Wednesday, 23 July, 2003, at 03:53, Zachery Bir wrote:
>
>> Using the TableModel.py example, I've gotten a bit further with the  
>> GUI aspect of my app. However, when running it, I run across this  
>> error in the Console:
>>
>> 2003-07-22 21:50:06.079 ZopeEditManager[8388] An exception has  
>> occured:
>> Traceback (most recent call last):
>>   File  
>> "release-dir/package/usr/lib/python2.2/site-packages/PyObjC/ 
>> PyObjCTools/AppHelper.py", line 32, in runEventLoop
>>   File  
>> "/Users/zbir/Developer/ZopeEditManager/build/ZopeEditManager.app/ 
>> Contents/Resources/ZopeEditController.py", line 147, in  
>> tableView_objectValueForTableColumn_row_
>>     return self.current_edits_data.get((aTableColumn, rowIndex),  
>> "{%s, %d}" % (col, rowIndex))
>> TypeError: an integer is required
>>
>> Here's the method (lifted straight from the TableModel.py module):
>>
>>     def tableView_objectValueForTableColumn_row_(self, aTableView,
>>                                                  aTableColumn,  
>> rowIndex):
>>         col = aTableColumn.identifier()
>>         return self.current_edits_data.get((aTableColumn, rowIndex),
>>                                            "{%s, %d}" % (col,  
>> rowIndex))
>>
>> Running the app built from TableModel.py gives the same error. Any  
>> pointers?
>
> Are you using PyObjC 0.9? If you do you have to multiple inherit from  
> NSTableDataSource (IIRC, check the class definition in TableView.py).

Nope, this is off CVS. Your TableModel doesn't extend  
NSTableDataSource, either. Oh, poo. I wonder if I'm using a 1.0b1  
example and 0.9. Yup.

zbir@gorilla $ python
Python 2.2.2 (#1, 03/31/03, 04:38:35)
[GCC Apple cpp-precomp 6.14] on darwin
Type "help", "copyright", "credits" or "license" for more information.
mpor>>> import objc
 >>> objc.__version__
'0.9'

Thanks,

Zac

Re: [Pyobjc-dev] Wrong spelling of tableView_objectValueForTableColumn_row_()?

[Ronald O. <ous...@ci...>]

On Wednesday, 23 July, 2003, at 03:53, Zachery Bir wrote:

> Using the TableModel.py example, I've gotten a bit further with the  
> GUI aspect of my app. However, when running it, I run across this  
> error in the Console:
>
> 2003-07-22 21:50:06.079 ZopeEditManager[8388] An exception has occured:
> Traceback (most recent call last):
>   File  
> "release-dir/package/usr/lib/python2.2/site-packages/PyObjC/ 
> PyObjCTools/AppHelper.py", line 32, in runEventLoop
>   File  
> "/Users/zbir/Developer/ZopeEditManager/build/ZopeEditManager.app/ 
> Contents/Resources/ZopeEditController.py", line 147, in  
> tableView_objectValueForTableColumn_row_
>     return self.current_edits_data.get((aTableColumn, rowIndex), "{%s,  
> %d}" % (col, rowIndex))
> TypeError: an integer is required
>
> Here's the method (lifted straight from the TableModel.py module):
>
>     def tableView_objectValueForTableColumn_row_(self, aTableView,
>                                                  aTableColumn,  
> rowIndex):
>         col = aTableColumn.identifier()
>         return self.current_edits_data.get((aTableColumn, rowIndex),
>                                            "{%s, %d}" % (col,  
> rowIndex))
>
> Running the app built from TableModel.py gives the same error. Any  
> pointers?

Are you using PyObjC 0.9? If you do you have to multiple inherit from  
NSTableDataSource (IIRC, check the class definition in TableView.py).

Ronald

Re: [Pyobjc-dev] fink pyobjc and nibclassbuilder: #!/sw/bin/python2.2

[Ronald O. <ous...@ci...>]

On Wednesday, 23 July, 2003, at 03:03, Kaben Nanlohy wrote:

>
> A possibility is renaming nibclassbuilder to nibclassbuilder-py{22,23}.
> I don't know how this would collide with nibclassbuilder's intended 
> use.

It wouldn't, other than possibly confusing users that try to use the 
tutorials. I don't know if it is possible to tell fink that 2 packages 
share a file, if it is you can postprocess the script to make sure that 
both versions have '#!/usr/bin/env python' as their first line.

Ronald

Re: [Pyobjc-dev] Returning BOOLs to Cocoa

[Ronald O. <ous...@ci...>]

On Tuesday, 22 July, 2003, at 23:27, Bob Swerdlow wrote:

> I hate to be a pain, but AppKit does not seem to include
> "NSWIndowDelegate" - get an ImportError: cannot find name 
> NSWindowDelegate.
> I can call setDelegate_ without the multiple inheritence and there is 
> no
> error, but the delegate functions don't respond.  :-(

I should have checked this in a 0.9 tree, 0.9 doesn't even include a 
definition
of this protocol. That leaves us one alternative: even more explicit 
markup.

Add 'windowShouldClose_ = objc.selector(windowShouldClose_, 
signature="c@:@")'
just below the definition of the method. This will tell the bridge that 
this
method returns a boolean instead of an object.

	class MyDelegate (AutoBaseClass):
		# ....
		def windowShouldClose_(self, sender):
			return 0

		windowShouldClose = objc.selector(windowShouldClose, signature="c@:@")

Another thing that will probably work: return None if the window 
shouldn't close
and any other value if it should.

Ronald
>
>
> ----- Original Message -----
> From: "Ronald Oussoren" <ous...@ci...>
> To: "Bob Swerdlow" <rsw...@tr...>
> Cc: <pyo...@li...>
> Sent: Tuesday, July 22, 2003 3:41 PM
> Subject: Re: [Pyobjc-dev] Returning BOOLs to Cocoa
>
>
>>
>> On Tuesday, 22 July, 2003, at 20:38, Bob Swerdlow wrote:
>>
>>> Ronald -
>>>
>>> We are using 0.9 and hope to release soon, so I haven't wanted to
>>> upgrade to
>>> 1.0b1 just yet.  However, when I add the call as you describe, Python
>>> tells
>>> me "No attribute addDelegate_".  Is there some module I need to
>>> include?
>>
>> The method is called setDelegate_, sorry about that. The other thing
>> you'll
>> have to do is multiple inherit the delegate from NSWindowDelegate
>> (should be in AppKit), e.g. 'class MyClass (AutoBaseClass,
>> NSWindowDelegate)'.
>>
>> PyObjC 0.9 was the last release where this was necessary. We then came
>> to
>> our senses and automaticly detected which protocols you're 
>> implementing
>> :-)
>>
>> Ronald
>>
>>
>>
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>>
>>
>
>
>
>
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[Pyobjc-dev] Wrong spelling of tableView_objectValueForTableColumn_row_()?

[Zachery B. <zb...@ur...>]

Using the TableModel.py example, I've gotten a bit further with the GUI  
aspect of my app. However, when running it, I run across this error in  
the Console:

2003-07-22 21:50:06.079 ZopeEditManager[8388] An exception has occured:
Traceback (most recent call last):
   File  
"release-dir/package/usr/lib/python2.2/site-packages/PyObjC/ 
PyObjCTools/AppHelper.py", line 32, in runEventLoop
   File  
"/Users/zbir/Developer/ZopeEditManager/build/ZopeEditManager.app/ 
Contents/Resources/ZopeEditController.py", line 147, in  
tableView_objectValueForTableColumn_row_
     return self.current_edits_data.get((aTableColumn, rowIndex), "{%s,  
%d}" % (col, rowIndex))
TypeError: an integer is required

Here's the method (lifted straight from the TableModel.py module):

     def tableView_objectValueForTableColumn_row_(self, aTableView,
                                                  aTableColumn,  
rowIndex):
         col = aTableColumn.identifier()
         return self.current_edits_data.get((aTableColumn, rowIndex),
                                            "{%s, %d}" % (col, rowIndex))

Running the app built from TableModel.py gives the same error. Any  
pointers?

Zac

[Pyobjc-dev] fink pyobjc and nibclassbuilder: #!/sw/bin/python2.2

[Kaben N. <k_P...@ra...>]

Hullo;

Andrea Riciputi noted that fink's pyobjc-py22 and pyobjc-py23 explicitly
'Conflict' with each other.  I responded that I meant to do that.  The
packages would refuse to install at the same time anyway, and I thought
that marking them as Conflicting would give the user better feedback.

The two packages share the single file /sw/bin/nibclassbuilder, which
differs in the first line:
    #!/sw/bin/python2.2
versus
    #!/sw/bin/python2.3
or even
    #!/sw/bin/python

fink has packages python, python22, and python23, and the binaries are
so-named.  Currently nibclassbuilder wants to be run using whatever
python was used to build it.

Since others have also asked why the two packages can't be installed
simultaneously, and I'm getting embarrassed explaining the reason, I
thought I'd ask how you would prefer I try fixing this?

A possibility is renaming nibclassbuilder to nibclassbuilder-py{22,23}.
I don't know how this would collide with nibclassbuilder's intended use.

-- Kaben

Re: [Pyobjc-dev] Returning BOOLs to Cocoa

[Bob S. <rsw...@tr...>]

I hate to be a pain, but AppKit does not seem to include
"NSWIndowDelegate" - get an ImportError: cannot find name NSWindowDelegate.
I can call setDelegate_ without the multiple inheritence and there is no
error, but the delegate functions don't respond.  :-(


----- Original Message ----- 
From: "Ronald Oussoren" <ous...@ci...>
To: "Bob Swerdlow" <rsw...@tr...>
Cc: <pyo...@li...>
Sent: Tuesday, July 22, 2003 3:41 PM
Subject: Re: [Pyobjc-dev] Returning BOOLs to Cocoa


>
> On Tuesday, 22 July, 2003, at 20:38, Bob Swerdlow wrote:
>
> > Ronald -
> >
> > We are using 0.9 and hope to release soon, so I haven't wanted to
> > upgrade to
> > 1.0b1 just yet.  However, when I add the call as you describe, Python
> > tells
> > me "No attribute addDelegate_".  Is there some module I need to
> > include?
>
> The method is called setDelegate_, sorry about that. The other thing
> you'll
> have to do is multiple inherit the delegate from NSWindowDelegate
> (should be in AppKit), e.g. 'class MyClass (AutoBaseClass,
> NSWindowDelegate)'.
>
> PyObjC 0.9 was the last release where this was necessary. We then came
> to
> our senses and automaticly detected which protocols you're implementing
> :-)
>
> Ronald
>
>
>
> -------------------------------------------------------
> This SF.net email is sponsored by: VM Ware
> With VMware you can run multiple operating systems on a single machine.
> WITHOUT REBOOTING! Mix Linux / Windows / Novell virtual machines at the
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> _______________________________________________
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> Pyo...@li...
> https://lists.sourceforge.net/lists/listinfo/pyobjc-dev
>
>

Re: [Pyobjc-dev] Returning BOOLs to Cocoa

[Ronald O. <ous...@ci...>]

On Tuesday, 22 July, 2003, at 20:38, Bob Swerdlow wrote:

> Ronald -
>
> We are using 0.9 and hope to release soon, so I haven't wanted to 
> upgrade to
> 1.0b1 just yet.  However, when I add the call as you describe, Python 
> tells
> me "No attribute addDelegate_".  Is there some module I need to 
> include?

The method is called setDelegate_, sorry about that. The other thing 
you'll
have to do is multiple inherit the delegate from NSWindowDelegate
(should be in AppKit), e.g. 'class MyClass (AutoBaseClass, 
NSWindowDelegate)'.

PyObjC 0.9 was the last release where this was necessary. We then came 
to
our senses and automaticly detected which protocols you're implementing 
:-)

Ronald

[Pyobjc-dev] Anyone using Foundation.NSRectFillList?

[Ronald O. <ous...@ci...>]

I just noticed that the interface of the wrapped NSRectFillList is a 
bit odd. Is anyone using this function at the moment, I'd like to clean 
up the interface.

The current interface accepts a string containing the struct.pack-ed 
representation of an array of NSRects,
it should accept a sequence of NSRects instead.

Ronald

Re: [Pyobjc-dev] Returning BOOLs to Cocoa

[Bob S. <rsw...@tr...>]

Ronald -

We are using 0.9 and hope to release soon, so I haven't wanted to upgrade to
1.0b1 just yet.  However, when I add the call as you describe, Python tells
me "No attribute addDelegate_".  Is there some module I need to include?

Thanks for your help.
- Bob


----- Original Message ----- 
From: "Ronald Oussoren" <ous...@ci...>
To: "Bob Swerdlow" <rsw...@tr...>
Cc: <pyo...@li...>
Sent: Tuesday, July 22, 2003 1:56 PM
Subject: Re: [Pyobjc-dev] Returning BOOLs to Cocoa


>
> On Tuesday, 22 July, 2003, at 18:31, Bob Swerdlow wrote:
>
> > I seem to be missing something about BOOLs returned from python members
> > called for Cocoa delegates. :-(
> >
> > I implemented a Cocoa delegate for my window to support
> > windowShouldClose_( ) since I need to do some checking of user input
> > before
> > I allow the window to close.  However, no matter what I return, the
> > window
> > always closes.
> >
> > Originally, I just used:
> >     return 0
> > but I also tried:
> >     return objc.NO
> >
> > I added a print statement for when the code returns objc.NO and it
> > printed:
> >     returning FALSE
> >
> > What is the proper value to return so that Cocoa knows I don't want it
> > to go
> > on?
>
> Returninging 0, False or objc.NO should work. Are you using PyObjC
> 1.0b1? If you're using the 0.9 release, you have to tell the bridge
> that you intent implement a window delegate.
>
> I added 'self.tableView.window().addDelegate_(self)' in 'awakeFromNib'
> and the following method to the TableView example and that works as
> expected.
>
>    def windowShouldClose_(self, sender):
>        """ Window won't close """
>        print "Should Close?"
>        return 0
>
>
> Ronald
>
>
>
> -------------------------------------------------------
> This SF.net email is sponsored by: VM Ware
> With VMware you can run multiple operating systems on a single machine.
> WITHOUT REBOOTING! Mix Linux / Windows / Novell virtual machines at the
> same time. Free trial click here: http://www.vmware.com/wl/offer/345/0
> _______________________________________________
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>
>

Re: [Pyobjc-dev] Returning BOOLs to Cocoa

[Ronald O. <ous...@ci...>]

On Tuesday, 22 July, 2003, at 18:31, Bob Swerdlow wrote:

> I seem to be missing something about BOOLs returned from python members
> called for Cocoa delegates. :-(
>
> I implemented a Cocoa delegate for my window to support
> windowShouldClose_( ) since I need to do some checking of user input 
> before
> I allow the window to close.  However, no matter what I return, the 
> window
> always closes.
>
> Originally, I just used:
>     return 0
> but I also tried:
>     return objc.NO
>
> I added a print statement for when the code returns objc.NO and it 
> printed:
>     returning FALSE
>
> What is the proper value to return so that Cocoa knows I don't want it 
> to go
> on?

Returninging 0, False or objc.NO should work. Are you using PyObjC 
1.0b1? If you're using the 0.9 release, you have to tell the bridge 
that you intent implement a window delegate.

I added 'self.tableView.window().addDelegate_(self)' in 'awakeFromNib' 
and the following method to the TableView example and that works as 
expected.

   def windowShouldClose_(self, sender):
       """ Window won't close """
       print "Should Close?"
       return 0


Ronald

[Pyobjc-dev] Returning BOOLs to Cocoa

[Bob S. <rsw...@tr...>]

I seem to be missing something about BOOLs returned from python members
called for Cocoa delegates. :-(

I implemented a Cocoa delegate for my window to support
windowShouldClose_( ) since I need to do some checking of user input before
I allow the window to close.  However, no matter what I return, the window
always closes.

Originally, I just used:
    return 0
but I also tried:
    return objc.NO

I added a print statement for when the code returns objc.NO and it printed:
    returning FALSE

What is the proper value to return so that Cocoa knows I don't want it to go
on?

Thanks!

Bob Swerdlow
COO
Transpose
rsw...@tr...
207-781-8284
http://www.transpose.com

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Re: [Pyobjc-dev] Need a little direction with delegates and main event loop

[Zachery B. <zb...@ur...>]

On Tuesday, July 22, 2003, at 05:53 AM, Jack Jansen wrote:

> On Monday, Jul 21, 2003, at 22:25 Europe/Amsterdam, Zachery Bir wrote:
>
>> Hey, all.
>>
>> I'm about 80% of the way done with my first PyObjC app. I've based it 
>> on Bill's Cocoa-Python Application template. I've done enough 
>> tweaking to both the MyAppDelegate and MainMenu.nib, that I think I'm 
>> off-track a bit. Here is some background info on the app and some 
>> particular issues I'm facing:
>
> Zac,
> just before 1.0b1 went out I started on a tutorial that is intended to 
> give a crash-course on understanding Cocoa application structuring to 
> people with a Python background but no previous experience with Cocoa 
> (using myself as an example of such a person:-).
>
> I get the impression you are stumbling against the same hurdles. Could 
> you help me debug/augment the tutorial? The current state is in 
> Doc/tutorial_reading.html (or .txt for the ReST version).

You bet. I'll look it over today.

Thanks,

Zac

Re: [Pyobjc-dev] Need a little direction with delegates and main event loop

[Jack J. <Jac...@cw...>]

On Monday, Jul 21, 2003, at 22:25 Europe/Amsterdam, Zachery Bir wrote:

> Hey, all.
>
> I'm about 80% of the way done with my first PyObjC app. I've based it 
> on Bill's Cocoa-Python Application template. I've done enough tweaking 
> to both the MyAppDelegate and MainMenu.nib, that I think I'm off-track 
> a bit. Here is some background info on the app and some particular 
> issues I'm facing:

Zac,
just before 1.0b1 went out I started on a tutorial that is intended to 
give a crash-course
on understanding Cocoa application structuring to people with a Python 
background but
no previous experience with Cocoa (using myself as an example of such a 
person:-).

I get the impression you are stumbling against the same hurdles. Could 
you help me debug/augment
the tutorial? The current state is in Doc/tutorial_reading.html (or 
.txt for the ReST
version).
--
Jack Jansen, <Jac...@cw...>, http://www.cwi.nl/~jack
If I can't dance I don't want to be part of your revolution -- Emma 
Goldman

Re: [Pyobjc-dev] Need a little direction with delegates and main event loop

[Ronald O. <ous...@ci...>]

On Monday, 21 July, 2003, at 22:25, Zachery Bir wrote:

> Hey, all.
>
> I'm about 80% of the way done with my first PyObjC app. I've based it=20=

> on Bill's Cocoa-Python Application template. I've done enough tweaking=20=

> to both the MyAppDelegate and MainMenu.nib, that I think I'm off-track=20=

> a bit. Here is some background info on the app and some particular=20
> issues I'm facing:
>
> It's a "nativication" of Casey Duncan's zopeedit.py, a client-side=20
> helper app for his External Editor product for Zope [1]. The=20
> server-side method marshalls any editor-worthy Zope object (could be=20=

> text, like Python Scripts, Zope Page Templates, DTML Methods, &c or it=20=

> could be images, like gif, jpeg, png, &c) and prepends it with several=20=

> lines of RFC822 headers of useful metadata. The client side script=20
> strips those off for use internally, writes the remaining file out to=20=

> a temp file, and launches an editor based on a lookup of the=20
> content-type/meta-type in an editor mapping. This file zopeedit.py=20
> works fine as a standalone on Linux/Windows, but it seems that Mac=20
> browsers won't accept an arbitrary file (albeit executable) as a valid=20=

> helper. This can be somewhat worked around by wrapping the python=20
> script in an AppleScript wrapper and using _that_ as the helper app,=20=

> but it doesn't work for all kinds of editors (notably Carbon apps -=20
> with Cocoa apps, I can typically point to the underlying binary in an=20=

> app bundle - can't seem to do that with Carbon apps, even if they're=20=

> bundled). So I set about writing my own app in PyObjC, so I could=20
> reuse as much code as possible, and extend it where I can to make a=20
> more pleasant UI. After cautiously (and incessantly) pestering Bill, I=20=

> was able to create an Application Delegate whose openFile_: method I=20=

> overrode to strip the file, look up the appropriate editor (using=20
> NSUserDefaults now instead of ConfigParser), and open the stripped=20
> file with it. Works great.
>
> Some issues:
>
>   =95=A0Now, unfortunately, I need to fulfill the main loop of the=20
> zopeedit script, and I'm at a bit of a loss on how to do that in the=20=

> template I'm using. Its __main__.py just jumps right into=20
> AppHelper.runEventLoop(). Coupled with the desire to have a bit more=20=

> control over the event loop, I need to set up some initial app=20
> attributes (my current workaround is ugly and doesn't seem to work=20
> terribly well anyway).

There is not much you can do about the runloop, maybe NSRunLoop has=20
methods that allow you to do the outer loop yourself (e.g. while 1:=20
someRunLoop.step()) but that is almost certainly not the right=20
solution.

If you only want to setup some global state you can do that before the=20=

call to runEventLoop. For timed events look at NSTimer, ....

>
>   =95=A0I'm trying to make a nice UI table of currently open edits =
showing=20
> filename and application editing them. I understand the need to=20
> delegate the class that will fulfill the various tableView_...=20
> methods, but I'm not sure a) where to make the connections in the nib=20=

> file, and b) where to define their implementation in the project.

There is only one connection in the NIB file for this: from the=20
TableView to its data source. The relevant outlet of NSTableView is=20
named dataSource. The TableView example shows you how to implement=20
them.

>
> Here's a rough breakdown of what I'm looking at:
>
>   =95=A0My app has a data structure of some sort holding current edits=20=

> (filename, the app that will edit them, and associated metadata used=20=

> for pushing the changes back to the server) I'd like this to be=20
> established in the creation of the app - does this belong in=20
> __main__.py? Originally, I tried establishing this in=20
> applicationDidFinishLaunching_(), but application_openFile_() is=20
> called before that, so I tried moving it to=20
> applicationWillFinishLaunching_(), and still it seems not to have been=20=

> made correctly.
IIRC applicatonWillFinishLaunching_ is called just before=20
applicationDidFinishLaunching, that won't help. I'd create the initial=20=

state before calling runEventLoop, and probably in the same file as the=20=

rest of the implementation of the model.
>
>   =95=A0This data structure needs to fulfill the NSTableDataSource =
methods=20
> to be set as the data source of the table view. Does this data=20
> structure need to be accounted for in the nib? Or just in Python code=20=

> - meaning, does it need to extend NibClassBuilder.AutoBaseClass?
See the TableView example. The datastructure itself need not be present=20=

in the NIB. I'd keep the model seperate from the controller. The=20
TableView example doesn't do this, I'll fix that.

What I find usefull is using a seperate class for storing the state,=20
and using the controller object (which is mentioned in the NIB) to=20
shuffle data to/from that state.

>
>   =95=A0The original script just runs with a while: 1 loop watching =
over=20
> the tempfile it creates and pushes the file back to the server when=20
> the mod time changes. I'd prefer to use notifications (seems more=20
> elegant), but if I can extend the main event loop with this behavior,=20=

> that would be an acceptable initial concession.

You can use timers to check if the modification time changes. I don't=20
know if there is a higher level API for this (like notification).

>
> That's basically it. It's an exceedingly simple python script, but=20
> turning it into a full Mac OS X app has proved challenging (mostly=20
> because I don't have my Cocoa experience - I'm sure all these feature=20=

> requirements are very simple to the initiated) :)

Cocoa starts out pretty simple, but most people seem to suffer from a=20
setback soon until they grasp the ideas behind Cocoa.

Ronald

>
> Thanks,
>
> Zac
>
> [1] External Editor product:=20
> <http://www.zope.org/Members/Caseman/ExternalEditor> - You don't need=20=

> Zope expertise to understand the client-side aspect.
>
>
> -------------------------------------------------------
> This SF.net email is sponsored by: VM Ware
> With VMware you can run multiple operating systems on a single =
machine.
> WITHOUT REBOOTING! Mix Linux / Windows / Novell virtual machines at =
the
> same time. Free trial click here: http://www.vmware.com/wl/offer/345/0
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Re: [Pyobjc-dev] Improved support for NSKeyValueCoding

[b.bum <bb...@ma...>]

On Monday, July 21, 2003, at 1:12 PM, Ronald Oussoren wrote:
> - PyObjCTools.KeyValueCoding should be removed, it is incomplete and 
> no longer
>   necessary.

Kill it -- it hasn't existed long enough for anyone to have used it for 
anything significant (I believe) and your implementation is such a vast 
improvement that everyone should switch.

b.bum
(Who is extremely grateful to Ronald for picking up KeyValueCoding and 
running with it.  Incredible stuff.   Thank you!!!!)

Re: [Pyobjc-dev] Improved support for NSKeyValueCoding

[Chris R. <cp...@em...>]

And this is in preparation for Panther, right? (Won't say more than 
that due to NDAs.)

On Monday, July 21, 2003, at 04:12  PM, Ronald Oussoren wrote:

> I've just checked in new, and extended, support for the Key-Value 
> Coding
> informal protocol. This is meant as a complete replacement for the 
> module
> PyObjCTools.KeyValueSupport. The new support code consists of three 
> parts.

Cheers!
--Chris Ryland / Em Software, Inc. / www.emsoftware.com

[Pyobjc-dev] Need a little direction with delegates and main event loop

[Zachery B. <zb...@ur...>]

Hey, all.

I'm about 80% of the way done with my first PyObjC app. I've based it=20
on Bill's Cocoa-Python Application template. I've done enough tweaking=20=

to both the MyAppDelegate and MainMenu.nib, that I think I'm off-track=20=

a bit. Here is some background info on the app and some particular=20
issues I'm facing:

It's a "nativication" of Casey Duncan's zopeedit.py, a client-side=20
helper app for his External Editor product for Zope [1]. The=20
server-side method marshalls any editor-worthy Zope object (could be=20
text, like Python Scripts, Zope Page Templates, DTML Methods, &c or it=20=

could be images, like gif, jpeg, png, &c) and prepends it with several=20=

lines of RFC822 headers of useful metadata. The client side script=20
strips those off for use internally, writes the remaining file out to a=20=

temp file, and launches an editor based on a lookup of the=20
content-type/meta-type in an editor mapping. This file zopeedit.py=20
works fine as a standalone on Linux/Windows, but it seems that Mac=20
browsers won't accept an arbitrary file (albeit executable) as a valid=20=

helper. This can be somewhat worked around by wrapping the python=20
script in an AppleScript wrapper and using _that_ as the helper app,=20
but it doesn't work for all kinds of editors (notably Carbon apps -=20
with Cocoa apps, I can typically point to the underlying binary in an=20
app bundle - can't seem to do that with Carbon apps, even if they're=20
bundled). So I set about writing my own app in PyObjC, so I could reuse=20=

as much code as possible, and extend it where I can to make a more=20
pleasant UI. After cautiously (and incessantly) pestering Bill, I was=20
able to create an Application Delegate whose openFile_: method I=20
overrode to strip the file, look up the appropriate editor (using=20
NSUserDefaults now instead of ConfigParser), and open the stripped file=20=

with it. Works great.

Some issues:

   =95=A0Now, unfortunately, I need to fulfill the main loop of the =
zopeedit=20
script, and I'm at a bit of a loss on how to do that in the template=20
I'm using. Its __main__.py just jumps right into=20
AppHelper.runEventLoop(). Coupled with the desire to have a bit more=20
control over the event loop, I need to set up some initial app=20
attributes (my current workaround is ugly and doesn't seem to work=20
terribly well anyway).

   =95=A0I'm trying to make a nice UI table of currently open edits =
showing=20
filename and application editing them. I understand the need to=20
delegate the class that will fulfill the various tableView_... methods,=20=

but I'm not sure a) where to make the connections in the nib file, and=20=

b) where to define their implementation in the project.

Here's a rough breakdown of what I'm looking at:

   =95=A0My app has a data structure of some sort holding current edits=20=

(filename, the app that will edit them, and associated metadata used=20
for pushing the changes back to the server) I'd like this to be=20
established in the creation of the app - does this belong in=20
__main__.py? Originally, I tried establishing this in=20
applicationDidFinishLaunching_(), but application_openFile_() is called=20=

before that, so I tried moving it to applicationWillFinishLaunching_(),=20=

and still it seems not to have been made correctly.

   =95=A0This data structure needs to fulfill the NSTableDataSource =
methods=20
to be set as the data source of the table view. Does this data=20
structure need to be accounted for in the nib? Or just in Python code -=20=

meaning, does it need to extend NibClassBuilder.AutoBaseClass?

   =95=A0The original script just runs with a while: 1 loop watching =
over=20
the tempfile it creates and pushes the file back to the server when the=20=

mod time changes. I'd prefer to use notifications (seems more elegant),=20=

but if I can extend the main event loop with this behavior, that would=20=

be an acceptable initial concession.

That's basically it. It's an exceedingly simple python script, but=20
turning it into a full Mac OS X app has proved challenging (mostly=20
because I don't have my Cocoa experience - I'm sure all these feature=20
requirements are very simple to the initiated) :)

Thanks,

Zac

[1] External Editor product:=20
<http://www.zope.org/Members/Caseman/ExternalEditor> - You don't need=20
Zope expertise to understand the client-side aspect.=

[Pyobjc-dev] Improved support for NSKeyValueCoding

[Ronald O. <ous...@ci...>]

Hi,

I've just checked in new, and extended, support for the Key-Value Coding
informal protocol. This is meant as a complete replacement for the 
module
PyObjCTools.KeyValueSupport. The new support code consists of three 
parts.

The first part is the end-user API in PyObjCTools.KeyValueCoding. This 
module
contains a number of functions that give a convenient API to use 
key-value
coding with Python objects (both for ObjC classes and unmodified plain
python classes). The API currently consists of 4 functions and is 
modelled
on the 'getattr' and 'setattr' functions that can be used to access 
attributes.

The second part is an implementation of the NSKeyValueCoding protocol 
for
the OC_PythonObject class. This makes it possible to use the Key-Value 
Coding
protocol for plain python objects from Objective-C.

And the last part is an implementation for the relevant parts of the
NSKeyValueCoding protocol for hybrid Python/ObjC objects. This is 
actually the
most complex bit to get right (see below).

Documentation is a problem, as usual. There is some documentation in the
online documetation but not much more.

How do we access attributes through 'keys'? For reading we try an 
attribute
named 'key', if that doesn't exist we try accessor methods
(getKey and get_key) and finally we try the attribute '_key'. For 
writing we
first try accessor method ('setKey' and 'set_key'), than the attribute
'_key' and finally 'key'. This is roughly simular to the way ObjC works.
For hybrid classes we use the Objective-C rules,
but check for Python attributes/properties before defering(sp?) to the
super-class implementation. The 3 implementations are consistent with
each other, thanks to the unitttests.

The major advantage over PyObjCTools.KeyValueCodingSupport is that the 
new
support code allows you to use Key-Value Coding with unmodified existing
Python classes. This should make it easier to split an application into 
a
platform independent core and a Cocoa GUI layer.

Open issues:
- Should probably check the accessor 'isKey' as well when reading 
attributes,
   but Cocoa doesn't do this, probably due to their naming convention.
- I'm not happy with the implementation of Key-Value Coding for hybrid
   classes. It feels hackish.
- The implementation for setting attributes in hybrid classes is not 
entirely
   consistant with the default implementation mentioned in the 
NSKeyValueCoding
   documentation, I think it is possible to work fix this later on.
- We don't access the private instance variables (e.g. __key). IMHO
   this would be a little too invasive (as well as non-trivial).
- PyObjCTools.KeyValueCoding should be removed, it is incomplete and no 
longer
   necessary.

Ronald

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[Pyobjc-dev] Re: reST editor experiments...

[Dinu G. <gh...@da...>]

David Goodger:

> I apologize for not replying sooner.  I just realized that I haven't
> been receiving Doc-SIG mail since June 26 when I reconfigured my email
> forwarding address.

No problem, I almost just returned from a vacation myself...

> Dinu Gherman wrote:
> > I'm experimenting with a prototype reST editor on OS X,
>
> Looks cool!  I'm wondering though, isn't it a bit CPU-intensive
> to re-process the entire document with every keystroke? ;-)

Sure, which is why it now uses timers to trigger the rendering every
few seconds and only if the text really changed. Of course, ideally
this would be done in a separate task...

> Is the software itself available?  I use OS X and I'd like to give it
> a try.

It's really only a proof of concept, but I've made a little "distri-
bution" which is available here:

   http://python.net/~gherman/tmp/ReSTedit1.jpg
   http://python.net/~gherman/tmp/ReSTedit.tar.gz

BTW, you might also want to check the following which does similar
things, but in a different context:

   http://python.net/~gherman/tmp/RegexPlor1.jpg
   http://python.net/~gherman/tmp/RegexPlor.tar.gz

> Are you aware of Gunnar Schwant's DocFactory?  It uses wxPython.
> <http://docutils.sf.net/sandbox/gschwant/docfactory/doc/>

No, I wasn't - thanks, looks very nice! I'm not sure how well wxPython
already works on OS X... I definitely like cross-platform programming,
but there are a few things that Cocoa gives me that I just don't want
to give away, like the Interface Builder and widgets for displaying
PDF, which might be an option for ReSTedit, one day...

> [other suggestions skipped]

Thanks, I'll be happy to look into this over the next weeks...

BTW, if DocFactory works really well on multiple platforms it would
be very interesting to build something like Hydra, a student project
for a collaborative distributed (even wirelessly) editor which re-
cently got an Apple design award:

   http://hydra.globalse.org

Regards,

Dinu

--
Dinu C. Gherman
......................................................................
"It is by the goodness of God that in our country we have these three
unspeakably precious things: freedom of speech, freedom of conscience,
and the prudence to practice neither." (Mark Twain)

[Pyobjc-dev] PLEASE REPLY

[Dr. N. T. <tni...@in...>]

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Re: [Pyobjc-dev] Panther support

[Just v. R. <ju...@le...>]

Ronald Oussoren wrote:

> The only problem that I know of is that Panther uses Python 2.3
> instead of Python 2.2. That makes it slightly harder to build binary
> distributions that work on both versions of the OS without shipping
> python inside your application.

Which, fortunately, is trivial with the latest bundlebuilder.py.

Just

Re: [Pyobjc-dev] Panther crash on extractClasses

[Ronald O. <ous...@ci...>]

On Friday, 18 July, 2003, at 02:25, Aaron Swartz wrote:

> I compiled the latest snapshot and 1.0b1 on Panther, created an 
> instance of the Cocoa-Python template and tried to compile and run it, 
> but each time it crashes with a bus error when it gets to 
> NibClassBuilder.extractClasses("MainMenu"). Here's the CrashReporter 
> log

The templates were developed for PB on Jaguar, there may well be bugs 
in them w.r.t. Panther support. Please file a bug on SF, and attach the 
crashing code. This will make it easier to reproduce your problem.

Ronald

Re: [Pyobjc-dev] Panther support

[Ronald O. <ous...@ci...>]

On Friday, 18 July, 2003, at 01:43, Paul Hart wrote:

> On Thursday, July 17, 2003, at 05:21  PM, Bob Ippolito wrote:
>> On Thursday, Jul 17, 2003, at 16:47 America/New_York, Aaron Swartz 
>> wrote:
>>
>>> Are there any plans for PyObjC to support Panther in the near 
>>> future? Should I just find a 10.2 machine to develop on instead?
>>
>> Of course, why don't you try and compile it and submit some bug 
>> reports about what works, what error messages come up, etc. and 
>> someone will try and fix it.  I'm a member of ADC, so I have Panther, 
>> but it's not on my primary machine and I don't have a whole lot of 
>> free time to play around at the moment.
>>
>> -bob
>
> On a similar note, I'd be interested to know what the differences are 
> between Jaguar and Panther; I'm about to get knee-deep in PyObjC for a 
> pet project that I've been mulling over for some time. If there are 
> problems with building Python-related apps and having them run on both 
> 10.2 and 10.3, I'd like to know earlier rather than later.

The only problem that I know of is that Panther uses Python 2.3 instead 
of Python 2.2. That makes it slightly harder to build binary 
distributions that work on both versions of the OS without shipping 
python inside your application.

Just to make this absolutely clear: we will support Panther when it is 
released, and I don't expect serious problems.

Ronald