[pygtk] sharing data between windows

[Doug Brewer]

Hmm. So if I kept everything in one big messy class, I wouldn't need to
worry about how windows communicate with each other, because they'd all have
access to the same methods. But if I want it to be neat and separate, I need
to use signals to communicate between windows? That added layer of
complexity might drive me back to messiness for now.

But thanks for this input, and I assume this is the path I'd take to
implement it?

http://faq.pygtk.org/index.py?req=show&file=faq03.009.htp

On Mon, Sep 14, 2009 at 9:24 PM, Jeffrey Barish
<jeff_barish at earthlink.net>wrote:

> Doug Brewer wrote:
>
> > Hello all,
> >
> > I am a beginner both in python and pygtk. I have an application I am
> > developing as a learning experience. It has multiple windows. Let's say
> > it's a main window and a selection window with a list of items in it,
> each
> > with their own ID. The code started getting big so I split it into two
> > classes, one for each window. Each window has its own glade file as well.
> > This seemed nice and clean but I am having problems understanding how
> > these separate classes interact.
> >
> > When the user selects the menu item, the main window class loads the pref
> > window and shows it. The user selects an item, and the window closes. But
> > here is where I got stuck. I could not figure out how to return the
> > selected value from the "child" window. The window has access to the
> > methods in the preferences class, but not the main class. The main class
> > can access the preference class functions, but doesn't know when the item
> > has been selected or the window closed.
>
> When you create separate classes for different parts of your GUI, you are
> essentially creating widgets.  Subclass gobject.  gobject provides means
> for
> sending signals from one widget to another (connect).  There was a tutorial
> for this technique at:
>
> http://www.sicem.biz/personal/lgs/docs/gobject-python/gobject-
> tutorial.html#d0e570<http://www.sicem.biz/personal/lgs/docs/gobject-python/gobject-%0Atutorial.html#d0e570>
>
> I'm getting an error message when I try to connect now, but maybe it will
> come back.  Also check the pygtk FAQ:
>
> http://faq.pygtk.org/index.py?req=index
>
> You should also understand the MVC pattern.  The easiest way to learn it is
> to use a framework that supports it.  I recommend pygtkmvc:
>
> http://pygtkmvc.sourceforge.net/pub/docs/tutorial/tutorial.html
>
> I use MVC mostly.  I create widgets only when I have an element that I want
> to reuse in several places in the GUI.
> --
> Jeffrey Barish
>
>
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