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Archived:How to create menu with callback function that receives parameters

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Article Metadata
Tested with
Devices(s): Nokia N96
Platform(s): S60 2nd Edition, S60 3rd Edition
Keywords: appuifw, menu
Created: diegodobelo (14 Jan 2009)
Last edited: hamishwillee (31 May 2013)


The receives a list of tuples.

Each tuple contains two elements.

  • The first element is a unicode that is the option name.
  • The second element is a function name that will be called when the option be selected.

The problem is that when passing parameters to a function, necessarily the function will be called and will return something (like None). In this case, when selecting an option, what will happen is this: something().

To solve the problem we need to create a function that receives parameters, creates an internal function (which uses the received parameters) and returns the internal function name. This is showed by the PySymbian code example below.

Code Snippet

#import modules
import appuifw, e32
#initial ball size
ball_size = 10
#define the menu callback function
def size(value):
#create an internal function which be returned
def internal_function():
global ball_size
ball_size += value
print ball_size
#return internal function name
return internal_function
#create the menu = []
#create menu items
option1 = (u"size up", size(2))
option2 = (u"size down", size(-2))
#append menu items to menu
#set up application exit
lock = e32.Ao_lock() = lock.signal


Following images show the outcome of above code.

Menu Items
Change in Ball Size
This page was last modified on 31 May 2013, at 01:03.
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