Python string question

Scripting Issues
1

In advance, sorry for the stupid question but can’t figure out the problem!
Why is this code printing the letter ‘z’ in advance and not while pushing the button ?

import direct.directbase.DirectStart
from pandac.PandaModules import *
from direct.gui.DirectGui import *

class Test(NodePath):
  def __init__(self):

    z= DirectButton(text = ("z", "z", "z", "disabled"), scale=.11,
                         command= self.addLetter('z'))

  def addLetter(self,data):
    print data

Test()
run()
2

Because when you write self.addLetter(‘z’) it means to call that function right now–at the time you create the DirectButton.

What you really want to write is command = self.addLetterZ, and then define a function called addLetterZ(self) that calls self.addLetter(‘z’).

You can also use a trick called binding, for instance with a lambda syntax, to do this without having to write a separate function, but it’s harder to understand how it works. For the record, the syntax would be command = lambda : self.addLetter(‘z’)

Davud

3

Aaargh… I understood my error reading your fifth word… I knew it was stupid!!!

I’m actually creating 26 buttons for entering a player name. Isn’t there a call that enable the keyboard writing ?

An other related question:
For a network chat, should I create 26 accept methods in a function or is there something to enable the keyboard ?

4

Try this thread:
https://discourse.panda3d.org/viewtopic.php?t=1317

David