Re: Rotating pixmap

[JParker coinstar com]

G'Day !

Could you have multiple drawing areas 1) to render background scenery 2) for flight instruments.  Same idea as frames on a web site.

cheers,
Jim Parker

Sailboat racing is not a matter of life and death ....  It is far more important than that !!!

Mihai BAZON <mbazon websci ro> Sent by: gtk-app-devel-list-admin gnome org 05/11/01 12:42 AM

To:        Havoc Pennington <hp redhat com>         cc:        Marco Quezada <mquezada nlxcorp com>, GTK List <gtk-app-devel-list gnome org>         Subject:        Re: Rotating pixmap

You can use ImageMagick (www.imagemagick.org) -- highly portable, can do
many transformations on a bitmap, knows many file formats, etc.

However, I think it's too much to require users of your program to have
imagemagick installed, only for this problem.  If your animation does
not depend on user (i.e. you already know that it will spin like a
compass) -- why not render it before, and when the program runs only
draw it (avoid useless computations)?

Cheers,

/*   -*- Mishoo -*-         In the beginning there was nothing,
 *  mishoo websci ro      which exploded.   (The Big Bang Theory)  */

On 10 May 2001, Havoc Pennington wrote:

>
> Marco Quezada <mquezada nlxcorp com> writes:
> >
> > I have a defined a draing area inside which I display a small icon (an
> > arrow). The icon is a pixmap which gets loaded with
> > gdk_pixmap_create_from_xpm_d and such. The XPM of the arrow shows the
> > arrow pointing to the right. I would like to show the arrow rotating
> > like a compass. Is it possible to rotate the pixmap when drawing it onto
> > the drawing area?
> >
>
> No. (That is, GTK provides no way. You can write your own code, but
> it's not trivial.)
>
> Havoc
>
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