[pygtk] PyORBit examples page
I've almost finished my translation to Python of the examples in the
ORBit Beginners Documentation (v1.6)[1]. The last one is the
multi-threaded calculator and I am not too sure how useful it'll be to
do (except for my learning :-) so I've left it for now.
I would very much like to have some feedback on it all, suggestions for
improvement are especially welcome.
Also someone sent me a private email offering some help. Unfortunately I
lost the email (I have been known to do some aggressive cleaning of my
inbox at times), I'd love it if you contacted me again.
You can find the page here:
http://magnus.therning.org/pyorbit_beg_exs.html
These are some of the things I've been pondering, any answers/comments
are welcome:
1. I had a practical problem with putting Python code on a web page (
got lost) and I went looking for a py2html pretty printer that
didn't create outrageous stuff (basically I want something rather
low-key, and preferably not full html pages with body-tags and all
but rather output that can be included. I found nothing and swapped
to texinfo for the moment. Anyone with a solution to the problem?
2. (This relates to the NameResolve example) I couldn't get
CORBA.ORB_init() to accept sys.argv (and hence I couldn't register a
name-service with -ORBInitRef NameService=IOR:... on the command
line. I probably made some trivial mistake. Any pointers?
3. (This relates to the Factory example) With interfaces like this:
module M {
interface IA { .. };
interface IB { IA createA(); };
};
and Python classes like this:
class myIA(M__POA):
...
class myIB(M__POA):
...
then myIB.createA() can't be naively implemented like this:
def createA(self):
return myIA()
but has to
1. create, and keep an instance of myIA alive
2. return that instance's _this()
Why is it like this? (I guess it has its positive sides to not have
the CORBA server-side representation of an object keep the instance
alive, but I can't quite see them.)
Anyone with an idea of how to kill the server-side Python instance
immediately? (I currently simply remove it from the list (the list
is the way I keep the objects alive in the first place) and garbage
collection will get around to them, can I make sure it happens
sooner?)
Well, that's it for now. Looking forward to being flooded with responses
;)
/M
1. http://www.gnome.org/projects/ORBit2/orbit-docs/orbit/index.html
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Re: [pygtk] PyORBit examples page
On Tue, 2004-08-03 at 16:38, Magnus Therning wrote:
I've almost finished my translation to Python of the examples in the
ORBit Beginners Documentation (v1.6)[1]. The last one is the
multi-threaded calculator and I am not too sure how useful it'll be to
do (except for my learning :-) so I've left it for now.
I would very much like to have some feedback on it all, suggestions for
improvement are especially welcome.
Also someone sent me a private email offering some help. Unfortunately I
lost the email (I have been known to do some aggressive cleaning of my
inbox at times), I'd love it if you contacted me again.
You can find the page here:
http://magnus.therning.org/pyorbit_beg_exs.html
These are some of the things I've been pondering, any answers/comments
are welcome:
1. I had a practical problem with putting Python code on a web page (
got lost) and I went looking for a py2html pretty printer that
didn't create outrageous stuff (basically I want something rather
low-key, and preferably not full html pages with body-tags and all
but rather output that can be included. I found nothing and swapped
to texinfo for the moment. Anyone with a solution to the problem?
I haven't used it in a while but enscript does a good job and can output
html. Something like enscript --color --pretty-print=python
--language=html -p [output_file] input_file should give you what you
want.
2. (This relates to the NameResolve example) I couldn't get
CORBA.ORB_init() to accept sys.argv (and hence I couldn't register a
name-service with -ORBInitRef NameService=IOR:... on the command
line. I probably made some trivial mistake. Any pointers?
3. (This relates to the Factory example) With interfaces like this:
module M {
interface IA { .. };
interface IB { IA createA(); };
};
and Python classes like this:
class myIA(M__POA):
...
class myIB(M__POA):
...
then myIB.createA() can't be naively implemented like this:
def createA(self):
return myIA()
but has to
1. create, and keep an instance of myIA alive
2. return that instance's _this()
Why is it like this? (I guess it has its positive sides to not have
the CORBA server-side representation of an object keep the instance
alive, but I can't quite see them.)
Anyone with an idea of how to kill the server-side Python instance
immediately? (I currently simply remove it from the list (the list
is the way I keep the objects alive in the first place) and garbage
collection will get around to them, can I make sure it happens
sooner?)
Well, that's it for now. Looking forward to being flooded with responses
;)
/M
1. http://www.gnome.org/projects/ORBit2/orbit-docs/orbit/index.html
--
Steve McClure [EMAIL PROTECTED]
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Re: [pygtk] Glade XML wrapper and easy callbacks
On Wed, 2004-07-28 at 16:54, Doug Quale wrote: Christian Robottom Reis [EMAIL PROTECTED] writes: The issue I raised was fear of namespace conflicts that would be introduced by this, but I think it's rather minor. I don't actually have a strong opinion whether that change would be good, bad or indifferent, so I was hoping someone smarter than me could give some good arguments one way or the other :) Smarter? Not me. But I have experienced it both ways. At work we've got a rather large app (80k lines of Python), a fair chunk of which is GUI code. We use libglade and some classes that wrap it up in a similar manner to many of the examples posted here. The basic principle is that your GUI class inherits from our own GWidget type thing, in which you write lines like this: list_store = self._widget.treeview.get_model() We had minor disagreement when we initially started with these classes as to whether that was more sensible than the aesthetically cleaner: list_store = self._treeview.get_model() We approached it conservatively and ended up with _widget everywhere. A year later I can confirm that it's a right pain in the arse. I don't know of a single situation where the _widget has protected us from a name space collision. You could reasonably point out that I wouldn't be likely to notice as nothing is going to go blow up in my face. Still, I attribute the lack of evidence to support _widget to the fact that we try and keep our classes fairly small and directed, and put business logic and UI control code in different classes (so there's nothing more than widgets and callbacks in the GUI code in the first place). I recently started an open soure app of my own and decided to experiment with a different style. In my own app I would do this: list_store = self.treeview.get_model() So far I'm enjoying the extra simplicity, but then my OS app is still less than 1k lines. My classes aren't coming out larger or smaller than they do at work though, and that's surely a more important issue. If anybody wants a really simple implementation to this kind of wrapper class feel free to rip off the WidgetWrapper class hierarchy that I've knocked up here (it's tiny): http://cvs.sourceforge.net/viewcvs.py/bandsaw/bandsaw/src/bandsaw.py?view=markup It's small and clean and plenty good enough for small projects. Apart from the automatic attribute access I'm a fan of being able to write multiple classes to manage different parts of a GUI that just happen to have been layed out in a single glade file. Band Saw's WidgetWrapper allows you to do this: class Window(WidgetWrapper): def __init__(self): WidgetWrapper.__init__(self, 'window1') # window1 is in glade menu = Menu(self) ... blah blah ... class Menu(WidgetWrapper): def __init__(self, window): WidgetWrapper.__init__(self, 'menu1', window) The thing to note is that the Menu is passed the window, which already has a glade.XML object within it. The Menu just re-uses the one that the Window has already made, saving you the overhead of loading the glade file twice (and saving you from having two windows pop up in the event that your top level window is visible by default). Not rocket science, but very handy. It's by no means as clever as the one we've got at work, but that's proprietary and I can't rip it off. It supports clever stuff like window stacking (i.e. transiency), object tracking (to catch memory leaks) and other nice goodies. None of it has been that hard to do. -- Graham ___ pygtk mailing list [EMAIL PROTECTED] http://www.daa.com.au/mailman/listinfo/pygtk Read the PyGTK FAQ: http://www.async.com.br/faq/pygtk/
Re: [pygtk] Help: Problem with pygtk + py2exe
Cedric Gustin wrote:
snip
You should also comment out the pygtk.require('2.0') as it is not
compatible with a py2exe'd application.
All the necessary files will be in the dist subdir but you still have to
install a GTK+ runtime though...
Works with pygtk-2.2.0 and pygtk-2.3.95 + the GTK+ runtimes from
dropline (2.2) and gladewin32 (2.4).
Hope it helps.
Thanks, that did the trick.
--
Jon Doda
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Re: [pygtk] Glade XML wrapper and easy callbacks
Graham Ashton [EMAIL PROTECTED] wrote: If anybody wants a really simple implementation to this kind of wrapper class feel free to rip off the WidgetWrapper class hierarchy that I've knocked up here (it's tiny): http://cvs.sourceforge.net/viewcvs.py/bandsaw/bandsaw/src/bandsaw.py?view=markup But the signal connection part is a little bit weak. How do you connect signals to some deeply nested widgets in that hierarchy? -- Sridhar - http://www.cs.annauniv.edu/~rsridhar Blog: http://www.livejournal.com/users/sridharinfinity ___ pygtk mailing list [EMAIL PROTECTED] http://www.daa.com.au/mailman/listinfo/pygtk Read the PyGTK FAQ: http://www.async.com.br/faq/pygtk/
[pygtk] a widget like gimp's canvas
Hi, is there something like gimp's canvas (scrollable drawingarea with rulers which scroll simulaneously with the drawingarea) for pygtk? -- maybe as code sample? -- Johannes ___ pygtk mailing list [EMAIL PROTECTED] http://www.daa.com.au/mailman/listinfo/pygtk Read the PyGTK FAQ: http://www.async.com.br/faq/pygtk/
