Scott David Daniels wrote:
> In particular, I thought about something like:
>
> @mousexy
> def OnRightClick(self, x, y):
> ...
You could somewhat generalize the idea -- have one argument in the wrapper
function provide the arguments missing in the wrapped one.
Here is a self-contained example, for the moment without support for keyword
arguments:
import inspect
class Event:
_x, _y, buttons = 1, 2, 3
def getX(self): return self._x
def getY(self): return self._y
_getter_for_name = dict(
x=Event.getX,
y=Event.getY,
buttons=lambda e: e.buttons
)
def event(fun):
getters = [_getter_for_name.get(arg) for arg in inspect.getargspec(fun
[0]]
def wrapped(*args):
# the Event instance must be the last argument
event = args[-1]
expanded = [get(event) for get in getters[len(args)-1:]]
args = args[:-1] + tuple(expanded)
return fun(*args)
return wrapped
class Alpha:
@event
def alpha(self, x):
print "--alpha--"
print "x =", x
@event
def beta(self, x, buttons):
print "--beta--"
print "x =", x
print "buttons =", buttons
@event
def gamma(buttons, y, x):
print "--gamma--"
print "x =", x
print "y =", y
print "buttons =", buttons
a = Alpha()
a.alpha(Event())
a.beta(Event())
gamma(Event())
# only the x argument will be set
# by the decorator (to Event().getX())
gamma("BUTTONS", "Y", Event())
Peter
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