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To: python-list@python.org
From: Rob Williscroft <rtw@rtw.me.uk>
Subject: Re: Button Label change on EVT_BUTTON in wxpython!!!
Date: Mon, 29 Aug 2011 17:46:49 +0000 (UTC)
References: <aa1212bb-35e5-4bf9-b8ad-7a3c083749c2@x2g2000yql.googlegroups.com>
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:12410

Ven wrote in news:aa1212bb-35e5-4bf9-b8ad-7a3c083749c2
@x2g2000yql.googlegroups.com in gmane.comp.python.general:

> So, here is what I did/want:
> 
> self.run_button=wx.Button(self.panel,ID_RUN_BUTTON,label='Install')
> self.Bind(wx.EVT_BUTTON, self.OnRun,id=ID_RUN_BUTTON)
> 
> def OnRun(self,evt):
>      self.run_button.SetLabel('Installing..')
>      #call a function that does the installation task
>      installation_task()
>      #After task completion, set the button label back to "Install"
>      self.run_button.SetLabel('Install')
> 
> When I try doing this, it doesn't set the label to "Installing" while
> the task is being performed. Any suggestions how do I achieve this?
> 

http://wiki.wxpython.org/CallAfter

Using this your OnRun will become somthing like:

def OnRun( self, evt ):
  def after():
    installation_task()
    self.run_button.SetLabel('Install')
  self.run_button.SetLabel('Installing..')
  wx.Callafter( after )

However if installation_task takes a long time you will need to use
threads, something like (untested):

def OnRun( self, evt ):
  def after():
    self.run_button.SetLabel('Install')
  def task():
    installation_task()
    wx.Callafter( after )

  self.run_button.SetLabel('Installing..')

  import threading
  threading.Thread( target = task ).start()

Rob.