[Pygui] Windows not being refreshed

[jkamph at juno.com]

Greg -  Thanks for the response. Initially, I had everything subclassed (MyApp( Application ) creating MyWindow( Window ) containing a provided Frame containing a MyFrame( Frame ) containing a provided Grid. As an experiment, I changed things so that each class just creates one of the built-in object and provides a method for retrieving the built in Window/Frame. I left MyApp as a subclass of Application so that I would still have someone able to handle button events. However, I'm still seeing the same behavior when I scroll through the list, namely, not having anything removed from the display when something new is supposed to be drawn on it. I feel as though I'm completely missing something fundamental. With this sort of setup, when I click to scroll down, am I expected to have an overridden method that will be invoked? At what level will one of my object be called first? What am I expected to do with that call? I've tried creating a draw method (that is invoked when I try to scroll), but I'm at a bit of a loss as to what I'm supposed to do with the provided canvas and rectangle.  Any help or pointing to the pertinent documentation is appreciated. Thanks in advance. jason    

---------- Original Message ----------
From: Greg Ewing <greg.ewing at canterbury.ac.nz>
To: "jkamph at juno.com" <jkamph at juno.com>
Cc: pygui at python.org
Subject: Re: [Pygui] Windows not being refreshed
Date: Sun, 25 Mar 2012 16:56:59 +1300

jkamph at juno.com wrote:

> When I give a new sub frame (or any other GUI object) in to the main 
> frame, all of the text of both objects are drawn in the main window. If 
> I hide the window and bring it back to the front, it'll be re-drawn, but 
> I can't seem to find where to do that programmatically. Is there 
> something that I'm missing in setting up the application/window?

Are you talking about user-defined views (derived from View) or
built-in components (buttons, labels, text fields, etc)?

To refresh a user-defined view, you call its invalidate() or
invalidate_rect() method. You shouldn't need to explicitly tell
built-in objects to refresh, they should do it themselves
automatically whenever needed.

Do you have something that isn't refreshing when you think it
should? Can you post a complete example?

-- 
Greg
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