Re: [Pythoncard-users] Creating dynamic window - addMethod revisited

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

Thanks for the response.

While waiting, I experimented and I came up with a
Python way (as oppose to the PythonCard way) to do it.
 See attached file.

When you run the attached program, each time a button
is pushed, a new button is created.  When that new
button is pushed, yet another new button gets
created...so on and so forth...

Ain't Python fun?

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

> 
> On Jun 22, 2007, at 9:56 AM,
> kc1...@ya... wrote:
> 
> > I've been searching the net for this topic and the
> one
> > thing that pops up is the addMethod routine.  It
> > sounds like something I can use.  However, there
> is no
> > information that I can find on how to use it to
> help
> > me.
> >
> > Could somebody please help.
> >
> > When I create a button on the fly - with a name
> > defined at run-time, how would I define a method
> for
> > it?
> >
> > Thanks,
> 
> http://pythoncard.sourceforge.net/text/addmethod.txt
> 
> addMethod was the way to do it in versions of
> PythonCard prior to  
> release 0.8, but when I changed to event binding to
> a more efficient  
> static system, rather than looking for event
> handlers each time an  
> event fires, the old addMethod stopped working as
> described.
> 
> Now, for some reason I thought that I was going to
> have to redo the  
> "magic" code in model.py for the addMethod method,
> so I let this  
> issue hanging. However, I just did a little
> experiment which seemed  
> to work fine, so let me know if this works for you.
> Simply add your  
> event handlers to your code BEFORE you create the
> components you want  
> the events to bind to:
> 
>  >>> def on_btn1_mouseClick(self, event):
> ... 	self.components.field1.text = event.target.name
> ...
>  >>> self.addMethod(on_btn1_mouseClick)
>  >>> comp['btn1'] = {'type':'Button', 'name':'btn1',
> 'position':(0,  
> 30), 'label':'btn1 hello'}
> 
> Other than the last two lines this is identical to
> the way it used to  
> work, we're simply making sure the event handler
> method is added to  
> our code before the component is created so its
> event binding works  
> correctly.
> 
> Now, assuming I didn't just get lucky, this is
> pretty nice that it  
> works again, but this example is done totally in the
> shell with the  
> minimal.py sample application. What I can't remember
> offhand, is  
> which Python module and method you need to use to
> pass in an  
> arbitrary string and get back a function that we can
> do something  
> with. For example, compiling...
> 
> c = someComboOfCompileAndEval('def
> on_btn1_mouseClick(self, event): 
> \n    self.components.field1.text =
> event.target.name\n\n')
> self.addMethod(c)
> 
> Maybe it is a combination of compile and eval, but
> the correct  
> globals and locals will have to be passed in order
> for it to make  
> sense as a method. I could probably dig into the
> Python interpreter  
> to see what it is doing with the text at the shell
> prompt, but if you  
> know, please post to the list.
> 
> Thanks,
> 
> ka
> 
> 
> 
> 
> 
>
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--
John Henry

--
John Henry