Re: How to use pixmaps in GTK+ applications?

[Iago Rubio <iago iagorubio com>]

On Sun, 2005-10-16 at 15:03 +0800, åæå wrote:
> Hi,
>
> I'm new to GTK development.
> In Windows environment, pixmaps are often compiled into the binary as
> resources. Or by making an installer, they can be installed as
> ordinary files, in a location that fixed relative to the binary
> executable.
> My question is, how to use pixmaps in GTK+? Can I make them resouces
> as in Win32?

You can use files directly or convert the images to C source code with
the tool gdk-pixbuf-csource included with gtk.

As example:

gdk-pixbuf-csource --raw --name=image image.png > image.h

Then from your code:

#include "image.h"

pixbuf = gdk_pixbuf_new_from_inline (-1, image, FALSE, NULL);

This way you won't need the images to be physically on disk.

>  If I use them as ordinary files, how can I know the path
> after users' installation? What should I do in the configure.ac and
> Makefile.am?

You should install them in a "known" location defined in one
configure.ac macro.

As example if you've got the files in the "images" directory this code
in the root Makefile.am should do the trick to install them.

if test -d $(srcdir)/images; then \
  $(mkinstalldirs) $(DESTDIR)$(pkgdatadir)/images; \
    for pixmap in $(srcdir)/images/*; do \
      if test -f $$pixmap; then \
        $(INSTALL_DATA) $$pixmap $(DESTDIR)$(pkgdatadir)/images; \
      fi \
    done \
fi

Then in your sources directory Makefile.amyou should define one macro to
use it in your sources:

INCLUDES = \
        -DPACKAGE_DATA_DIR=\""$(pkgdatadir)"\" \
        ....

The images will be saved on:

PACKAGE_DATA_DIR "/images"

gdk_pixbuf_new_from_file  (PACKAGE_DATA_DIR "/images/image.png ", NULL);


> The questions may seem stupid to you, but I don't quite understand the
> autotools.

The question is not stupid and autotools have its learning curve.