Strange behaviour of setopt and binkey in a widget

[Mike Perdide <mike.perdide@xxxxxxxxx>]

Hello zsh users,
I'm trying to customize the behaviour of CTRL-D in certain conditions
and I 'm observing strange behaviours from zsh.
Here is what I do :

-------------- From my .zshrc ---------------
widg0() { echo "not really exiting"; }
zle -N widg0
widg1() { setopt ignoreeof; bindkey "^D" widg0; }
widg2() { unsetopt ignoreeof; bindkey -r "^D"; }
zle -N widg1
zle -N widg2
bindkey "^O" widg1
bindkey "^P" widg2

-------------- Starting from a bash shell :

[22:49] :~$ zsh
north.~% <CTRL-O> <CTRL-D>
zsh: use 'exit' to exit.
north.~% <CTRL-D>not really exiting
          !!! First strange behaviour : the prompt is not redrawn. At
this point I press <ENTER> to get my prompt back :
north.~% <CTRL-P> <CTRL-D>
!!! The previous ligne is rewritten with these two :
[22:53] :~$
zsh: use 'exit' to exit

-----------------------------------------------------------------------------------------------

The long story behind the ^D rebinding is that I'm using
virtualenvwrapper, that is a wrapper around virtualenv, a tool
designed to build virtual environments using python. This wrapper
activates virtual environments by making directories and setting env
variables to these directories (such as PATH). When a environment is
activated, the only way to  deactivate it is to enter "deactivate".
Typing ctrl-d will exit the shell you're in, and I think that's not a
nice behaviour. What I'm trying to do is to rebind ctrl-d so when it
is used in a virtual environment, this environment would be
deactivated but the shell wouldn't exit.

Am I doing something wrong ? Is the "strange" behaviour I'm observing
a feature I'm not using correctly ?
Thanks in advance.

(I already posted this on zsh-workers, but I guess it wasn't the
proper mailing list)

Regards,

Mike Perdide.