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Revision as of 11:46, 26 December 2008 by croozeus (Talk | contribs)

Archived:Dynamic Menus in PySymbian

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Article Metadata
Tested with
Devices(s): Nokia N95, Nokia E90
Compatibility
Platform(s): S60 1st Edition, S60 2nd Edition, S60 3rd Edition
Article
Keywords: UI
Created: (25 Aug 2008)
Last edited: croozeus (26 Dec 2008)

Overview

The code below shows a method that can be used to change your menu dynamically in PyS60, depending on some preconditions that may change in your application in the course of its execution:

Code Snippet

Class Application:
 
def UpdateMenu(self):
 
def HasWaypoints():
return len(self.waypoints) > 0
 
def HasTracks():
return len(self.tracks) > 0
 
def HasOpenTracks():
return len(self.opentracks) > 0
 
def HasMaps():
return len(self.maps) > 0
 
def CreateMenu(items):
menu = []
for i in items:
if i[0]():
menu.append((i[1],i[2]))
if len(menu) > 0:
return tuple(menu)
else:
return None
 
items = [
( HasMaps, u'Open Map', self.OpenMap ),
( HasWaypoints, u'Monitor Waypoint', self.MonitorWaypoint ),
( HasTracks, u'Open Track', self.OpenTrack ),
( HasOpenTracks, u'Close Track', self.CloseTrack ),
]
 
menu = [
(u'About', self.About),
) ]
 
dyn_menu = CreateMenu(items)
if dyn_menu != None:
menu.append( (u'GPS', dyn_menu) )
 
appuifw.app.menu = menu
 
def CloseOpenTracks():
self.opentracks = []
self.UpdateMenu()

Note

Now whenever the precondition changes in the application, you can call UpdateMenu, and the menu is changed accordingly, as is demonstrated in the CloseOpenTracks method.

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