Version française
Home     About     Download     Resources     Contact us    

This site is updated infrequently. For up-to-date information, please visit the new OCaml website at

Browse thread
[Caml-list] Problems using graphics
[ Home ] [ Index: by date | by threads ]
[ Search: ]

[ Message by date: previous | next ] [ Message in thread: previous | next ] [ Thread: previous | next ]
Date: 2003-01-10 (13:36)
From: Xavier Leroy <xavier.leroy@i...>
Subject: Re: [Caml-list] Problems using graphics
Hi Sébastien,

> I'm writing a small problem using Graphics and encountered the
> following problems :
> - Unix.sleep does not work in conjunction with Graphics. I found the
>   solution in the archive of the Caml List (
> ), but i think
>   this point deserves a note in the documentation or in the FAQ.

Fair enough.  Perhaps a function Unix.really_sleep (that ignores
signals) is in order.

> - The name of a window can be changed only after a window is
>   opened. This is a trouble because some window managers use the name
>   of the window when it opens to decide its position, type of
>   frame... This means it is impossible to differentiate the behavior
>   of two different "Caml Graphics" windows.

Good point.  Should be easy to fix.

> - "fill_rect x y w h" and "draw_rect x y w h" do not draw the same
>   rect. draw_rect is bigger and lower. In my opinion, fill_rect does
>   the right thing. In order to see the problem, try :

Well, Caml calls the X Windows drawing primitives XDrawRectangle and
XFillRectangle with exactly the same arguments.  But that seems to run
into an, hmmm, oddity of X Windows, described in colorful language in
the "Unix Haters" handbook:
Guess we'll have to work around this one.

- Xavier Leroy
To unsubscribe, mail Archives:
Bug reports: FAQ:
Beginner's list: