Glib / GObject newbie

[Laurent JALLET <jallet irit fr>]

Hi all,

I'm developping an application in C and I'd like to use the GObjects 
(and later GTypeModule).
I'm not using GTK, I just want to "program Object Oriented with C".

I've studied Mathieu Lacage's Gobject sample (maman_bar etc.) and I've 
created some 'simple' classes but I 'd like to implement a Gobject 
containing other Gobjects. And I don't know how to write the 
get/set_property for a Gobject.
I'm sorry I'm not very clear.

hum...
that's what I want to implement using GObjects :
. a Camera containing a position ( => Vector3 : a GObject containing 3 
gfloats) and other members


so I've got :
typedef struct t_Camera Camera;
typedef struct t_CameraPrivate CameraPrivate;

struct t_Camera {
 GObject parent;
 /* instance members */
 CameraPrivate *priv;
};

and
struct t_CameraPrivate
{
 gfloat mFov;
 Vector3 mPosition;
// and other members ...
};

and I'd like to write
static void
camera_get_property (GObject *object,  guint property_id,  const GValue 
*value, GParamSpec   *pspec)
{
      Camera *self = (Camera *) object;

       switch (property_id) {
       case CAMERA_FOV: {
               g_value_set_float (value, self->priv->mFov);
       }
               break;

       case CAMERA_POSITION :
       // There is my problem
       // I don't know what to do

How can I transform a GValue into a GObject ?
And how do I use it ?

Of course there's the same problem with the camera_set_property function.


I don't really understand what GValue is and how I can use it.

I hope you understand my problem and I thank you in advance.

L.J.