From: SpringFlowers AutumnMoon <summercoolness@...>
Date: 2007-09-24T20:34:26+09:00
Subject: Re: how to use Ruby / Tk to display a text message status bo

Alex Fenton wrote:
> SpringFlowers AutumnMoon wrote:
>> how can we pop up a Tk window to display the temporary results of a
>> program?

> When you call "mainloop", you're telling Tk (and other GUIs, too) to
> wait for the user to do something (eg click a button). This is sometimes
> called an "event loop". As the "loop" name suggests, the program stops
> at this point and nothing further will be run until the GUI is ended.
> 
> To run other tasks (such as your calculation) concurrently with the
> event loop, start those other tasks in a ruby Thread alongside the GUI
> code. Then, if you want to display intermediate results from that task
> in the GUI, pass messages between the task thread to the main GUI
> thread. Again, there's numerous different ways to do this.

what about not calling the MainLoop but just keep on painting on the GUI 
window?  For example, like in Win 32, I had a program that just popped 
out a window and then I just keep on using DrawText to paint the result. 
The whole program doesn't need to have any event driven handling.  just 
drawing text to a window.

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