Re: [Pythoncard-users] Creating dynamic window

[John H. <ec...@ya...>]

No dice.  Here's what I have:

def mouseclick_factory(parent, name):
    def function(self, event):
        print "You clicked '%s'." % name
    function.name = "on_%s_mouseClick" % name
    method = new.instancemethod(function, parent,
parent.__class__)
    setattr(parent, function.name, method)
    parent._addHandler(method)
    parent.components[name] = {'type':'Button',
                                 'name':name,
                                 'label':name,
                                 'position':(5,
5+int(name[-1:])*30),
                                 'text':name}
    return function

class Minimal(model.Background):
    def on_initialize(self, event):
        self.components['field1'] =
{'type':'TextField','name':'field1','position':(5,
5),'size':(150, -1),'text':'Hello PythonCard'}
        mouseclick_factory(self, "Button1")

if __name__ == '__main__':
    app = model.Application(Minimal, None, rsrc)
    app.MainLoop()


When I click on Button1, nothing happens.



--- Kevin Altis <al...@se...> wrote:

> 
> On Jun 23, 2007, at 12:36 PM, John Henry wrote:
> 
> > There are people at the Python newsgroup
> suggesting
> > that I should avoid using exec to accomplish this.
> > Here's what they suggested:
> >
> 
> ...
> 
> >         function = mouseclick_factory(self, name)
> # as
> > before
> >         method = new.instancemethod(function,
> self,
> > self.__class__)
> >         setattr(self, function.name, method)
> 
> ...
> 
> You're basically doing what addMethod does, so after
> the setattr  
> call, try
> 
> self._addHandler(method)
> 
> As mentioned before you're going to have to create
> the component  
> after the event handler is created and bound or its
> bind events  
> "magic" won't happen correctly. That means this bit
> in your factory  
> needs to be moved out and after the _addHandler
> call.
> 
>      parent.components[name] = {'type':'Button',
>                                   'name':name,
>                                   'label':name,
>                                   'position':(5,
> 5+id_num*30),
>                                   'text':name}
> 
> The way the PythonCard event binding works now is
> more efficient as I  
> said but it is faster in part because of the caching
> of event handler  
> names which is what the call to _addHandler is
> doing. You can see all  
> this code in model.py. The handler name is added to
> a simple  
> dictionary used for lookups by the findHandler
> method. In the old  
> system, there was a lot of looping done at event
> dispatch time to  
> find the right handler, back when everything was
> dynamic, but when I  
> streamlined the code, I kept the old strategy, but
> simply moved it  
> into a one-time event binding when a component is
> created.
> 
> > Unfortunately, it doesn't work.  PythonCard
> doesn't
> > calll the fuction created by the
> mouseclick_factory.
> > However, if I place the following statement right
> > after the setattr call, it works (proving that the
> > function actually gets created).
> >
> >         self.on_Button1_mouseClick(event)
> >
> > Any idea why this doesn't work?
> >
> > Thanks,
> >
> > --
> > John Henry
> 
> ka
> 
>
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--
John Henry