Gtk with Video

gboolean
expose_event_callback (GtkWidget *widget, GdkEventExpose *event, gpointer data)
{
    GtkImage *gtkImage;
    gtkImage = GTK_IMAGE (data);
    GdkImage **gdkImage;
    gtk_image_get_image (gtkImage, gdkImage, NULL);

    gdk_draw_image (
        widget->window,
        widget->style->fg_gc[gtk_widget_get_state (widget)],
        *gdkImage,
        0,
        0,
        widget->allocation.width,
        widget->allocation.height,
        640,
        480
        );

    return TRUE;
}

void
buttonShowVid_clicked (GtkButton *button, gpointer user_data)
{
    GtkEntry *entry;
    entry = GTK_ENTRY (user_data);

    CvCapture *video;
    video = cvCreateFileCapture (gtk_entry_get_text (entry));

    if(video == NULL)
    {
        GtkWidget *errDialog;
        errDialog = gtk_message_dialog_new (NULL, GTK_DIALOG_DESTROY_WITH_PARENT, GTK_MESSAGE_ERROR, GTK_BUTTONS_CLOSE, "Error loading video \"%s\"", gtk_entry_get_text (entry));
        gtk_dialog_run (GTK_DIALOG (errDialog));
        gtk_widget_destroy (errDialog);
        return;
    }

    GtkWidget *window;
    GtkWidget *vbox;
    GtkWidget *draw;

    window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
    vbox = gtk_vbox_new (FALSE, 0);
    draw = gtk_drawing_area_new ();
    gtk_widget_set_size_request (draw, 640, 480);

    gtk_container_add (GTK_CONTAINER (window), vbox);
    gtk_box_pack_start (GTK_BOX (vbox), draw, FALSE, FALSE, 0);

    gtk_widget_show_all (window);

    while(cvGrabFrame(video))
    {
        IplImage *image;
        image = cvRetrieveFrame(video);

        GdkPixbuf *pix;
        pix = convertOpenCvToGtk (image);

        GtkWidget *gtkImage;
        gtkImage = gtk_image_new_from_pixbuf(pix);

        g_signal_connect (G_OBJECT (draw), "expose-event", G_CALLBACK (expose_event_callback), (gpointer)gtkImage);
    }




}