Is there a wxpython event like program_start?

Question

OK, I'm trying to explain what I want to achieve in another way. Here's an example:

Say if it's an anti virus program, and user can choose between two ways to run the program, choice one, automatically start to scan disks for virus when the program starts up, choice two, hit the start button to make the program scan disks for virus after the program starts up any time the user wants. So, as a wxpython beginner, I know how to bind wx.EVT_BUTTON to let scanning start after the user hit the start button, but I don't know how to make the scanning start once the program starts up. I wonder if there's a program_start event I can bind? Hope you guys can help me out. Thanks!

Answer 1

Why don't you run it just in module code? This way it will be run only once, because code in module is run only once per program instance.

Answer 2

In wxPython you can override the OnInit method of your Application class to run code when the program launches. For example:

  def OnInit(self):
    # Check for a running instance for this user.  Do not instantiate if found.
    if self.checkInstance():
      dbcon.cursor().callproc('post_mutex', (self.mutexname,))
      dbcon.commit()
      self.Cleanup()
      return False

    # Register for database events.
    DataCache['dbListener'] = dbListener()

    return True

There is of course another method on my Application class called checkInstance. Depending on it's return value, my application either launches, or triggers the other running instance to launch.

In wxPython you don't have to do anything special with your App class to get the binding to take place for your OnInit method. It'll happen automatically if you override it.

Answer 3

In your init or OnInit method, do some kind of check to see if the program should run the startup process on startup (i.e. check a config file or some such). If yes, call the "scan" method using wx.CallAfter or wx.CallLater or call it after you Show() the frame.