Re: [Pythoncard-users] Creating dynamic window

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

Thanks for the response.

The code almost worked.  The offending line is:

function.func_name = "on_%s_mouseClick" % name

which is a TypeError violation (readonly attribute). 
I ran into this too when I try to set method.__name__
directly.

The workaround, as it seems, is to have an addHandler
function (rather then the _addHandler function) that
does this: 

    def addHandler(self, aMethod):
        # Add the Handler to our Handler list.
        if aMethod.name not in self._handlers:
            log.debug("addHandler: " + aMethod.name)
            #self._handlers[aMethod.name] =
event.Handler(aMethod)
            self._handlers[aMethod.name] = aMethod

instead of this:

    def _addHandler(self, aMethod):
        # Add the Handler to our Handler list.
        if aMethod.__name__ not in self._handlers:
            log.debug("_addHandler: " +
aMethod.__name__)
            #self._handlers[aMethod.__name__] =
event.Handler(aMethod)
            self._handlers[aMethod.__name__] = aMethod


When I call addHandler then, the code works.  When I
click the first button, a new button gets created. 
One minor puzzle though, Python passes down 3
parameters to the handler (rather then just 2).  The
first 2 are both the same and it's the normal "self"
parameter you get with other handlers.  The 3rd one is
the event object.  I don't know why I get "self" twice
though.




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

> After a bit of research I came up with the following
> working example  
> which uses a slightly modified version of your
> original factory.  
> func_name seems to be the important attribute. I was
> able to use  
> addMethod to clean up the code a bit .
> 
> This still doesn't solve the problem of creating an
> arbitrary  
> function/method from a string, but that's a generic
> Python problem  
> that I don't know the answer to rather than
> something PythonCard- 
> specific.
> 
> ka
> ---
> 
> from PythonCard import model
> 
> rsrc = {'application':{'type':'Application',
>            'name':'Minimal',
>      'backgrounds': [
>      {'type':'Background',
>            'name':'bgMin',
>            'title':'Minimal PythonCard Application',
>            'size':(200, 100),
>           'components': [
> 
> ] # end components
> } # end background
> ] # end backgrounds
> } }
> 
> 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'}
>          self.mouseclick_factory("Button1")
>          self.mouseclick_factory("Button2")
> 
>      def mouseclick_factory(self, name):
>          def function(self, event):
>              # changed to event.target.name to
> verify we're getting
>              # the correct target when button is
> clicked
>              print "You clicked '%s'." %
> event.target.name
>          # func_name seems to be the magic attribute
> rather than
>          # just setting func.name
>          function.func_name = "on_%s_mouseClick" %
> name
>          self.addMethod(function)
>          self.components[name] = {'type':'Button',
>                                       'name':name,
>                                       'label':name,
>                                      
> 'position':(5,5+int(name[-1:]) 
> *30),
>                                       'text':name}
>          return function
> 
> 
> if __name__ == '__main__':
>      app = model.Application(Minimal, None, rsrc)
>      app.MainLoop()
> 
> 
>
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--
John Henry