[...]
> I use the class so that I can have a common namespace, but importing __main__
>every time I want to access it seems not only ugly, but "wrong" due to the lack
> of modularity. Is there a better way I can write/structure this program's namespace?
[...]
This is the code I wrote to solve this for SQmaiL:
---snip---
class WidgetStore:
def __init__(self, tree):
self._tree = tree
def __getattr__(self, attr):
w = self._tree.get_widget(attr)
if not w:
raise AttributeError("Widget "+attr+" not found")
self.__dict__[attr] = w
return w
__getitem__ = __getattr__
class _callback:
def __init__(self, dest, method):
self.dest = dest
self.method = method
def __call__(self, *args):
try:
return apply(self.method, (self.dest,) + args)
except TypeError:
print "Exception while calling", self.method.__name__, "on",
self.dest
print "Args:", args
raise
class Callback:
def __init__(self, dest):
self.dest = dest
self.dict = {}
for i in self.dest.__class__.__bases__:
self.dict.update(i.__dict__)
self.dict.update(self.dest.__class__.__dict__)
def items(self):
l = []
for key, value in self.dest.__class__.__dict__.items():
if (type(value) == types.FunctionType):
l.append((key, _callback(self.dest, value)))
return l
def __getitem__(self, name):
return _callback(self.dest, self.dict[name])
---snip---
WidgetStore is an interface to a Glade tree; Callback is a wrapper to allow you
to send callbacks to a specific object.
I use it like this:
---snip---
class SQmaiLReader:
gladefilename = "sqmail.glade"
def __init__(self):
[...]
# Create the main window and the widget store.
self.mainwindow = self.readglade("mainwin")
self.widget = sqmail.gui.utils.WidgetStore(self.mainwindow)
[...]
gtk.mainloop()
# Read in a Glade tree. Signals are attached to methods on the
# supplied object o; if o is omitted, this object is used.
def readglade(self, name, o=None):
if not o:
o = self
obj = libglade.GladeXML(self.gladefilename, name)
obj.signal_autoconnect(sqmail.gui.utils.Callback(o))
return obj
---snip---
Now I can do "self.widget.glade_widget_name" and it will automatically look up
"glade_widget_name" in the tree and return it to me (all cached so it's fast).
What's more, I can tell Glade to connect a button to the signal
"on_quit" and when I press it, the "on_quit()" method is
automatically invoked:
---snip---
def on_quit(self, obj):
sys.exit(0)
---snip---
Very, very handy. It could hardly make development with Glade and Python easier.
Python is a Good Thing.
--
+- David Given ---------------McQ-+
| Work: [EMAIL PROTECTED] | "Ignore reality. There's nothing you can
| Play: [EMAIL PROTECTED] | do about it." --- Natalie Imbruglia
+- http://wired.st-and.ac.uk/~dg -+
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