Changing global variables in tkinter/pmw callback

[Brian Elmegaard]

Hi,

I think I am running into a problem with scope, but I am not sure.
I have a global variable CurrentCanvasSetting. This is set to first set
to 'init'.

I then have two class instances, one for a toolbar and one for a canvas.
In the in __init__ of the toolbar I set the callback of the buttons as:

button.configure(command = lambda self=self,
                 button=button, buttons=self.buttons,
                 setting=CurrentCanvasSetting:
                 self.apply(button,buttons,setting))


In apply I do:
         def apply(self,button,buttons,setting):
             setting= button.cget('text')

and in here I can then print setting and see it holds the name of the
button.

However, this is not passed to the global CurrentCanvasSetting as seen
when I try to use it in the sheet class:
self.sc.component('canvas').bind('<1>', lambda event,
                                  self=self,
                                  setting=CurrentCanvasSetting:
                                  self.addit(setting,event))
where addit is:
         def addit(self,setting,event):
             print setting

but always prints 'init'.

How can I change CurrentCanvasSetting from toolbar.apply and make
sheet.addit see the change?


-- 
Brian
http://www.et.dtu.dk/energysystems
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