From: Josef Wolf <jw@...>
Date: 2006-09-06T03:00:25+09:00
Subject: Re: How to properly bind context menus to canvas in Ruby/Tk?

On Tue, Sep 05, 2006 at 08:43:01PM +0900, Morton Goldberg wrote:

Thanks for the reply, Morton!

> I tried running your code on my system which is OS X 10.4.7 running  
> Ruby 1.8.2, and I don't see what you report. What I see is following:
> 
> * Right-clicking away from the the rectangle, the canvas' contextual  
>   menu pops-up.
> * Right-clicking on the rectangle.
>     ** The rectangle's contextual menu pops-up.
>     ** When the rectangle's menu is dismissed, the canvas'  
> contextual menu pops-up.

How do you "dismiss" the menu?  Whatever I do, I never get the second menu.

> With a small tweak, I was able to keep the canvas' contextual menu  
> from popping up when the the rectangle is right-clicked. So what I  
> have now running on my system works as you expected.

Your handled_by_rect flag seems to do the trick.  But this would be a
global flag in my case since the menus are created from different
classes. :-(  I would like to avoid such a global flag.

The Tk::Bind manpage mentions that processing of matching callbacks can
be controlled by "return" or calling "Tk->break" inside the callback.
That is, the rectangle's callback should call Tk->break.  But none of
the involved classes seem to have a break method.  And returning
false/true/nil/1/0 don't have any effect, too.  Any ideas?