Re: Adding the gdk-pixbuf canvas object to the canvas

[Paolo Molaro <lupus ximian com>]

On 10/16/01 Dov Grobgeld wrote:
> I tried to add the gdk-pixbuf canvas object so that it works
> with GtkPerl. Compilation works, but when I try to use it
> in the following code:
>
>     my $img = new_from_file Gtk::Gdk::Pixbuf("save.png");
>     my $imgitem = $cgroup2->new($cgroup2, "Gnome::CanvasPixbuf",
>           'pixbuf' => $line,
>           'x' => 50,
>           'y' => 50,
>           );
>
> I get the error message:
>  
>     Cannot set argument of type gpointer (fundamental type gpointer)
>     at ./canvas-pixbuf.pl line 126.
>     
> Does someone have any idea of what I forget? 

The 'pixbuf' property of Gnome::CanvasPixbuf is registered as
GTK_TYPE_POINTER, so the perl binding can't use it in a safe way.
You may want to do something like the code in
Gnome/xs/GnomeCanvasItem.xs (the PerlGtkTypeHelper struct and the call
to AddTypeHelper): when the argument type is GTK_TYPE_POINTER, you
assume it's a pixbuf that you need to store/retrieve. You can also check
that arg->name is "pixbuf" so that the guess is more reliable.

lupus

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