First Attempt at Accessing GObject Private Data - FAILED

When the toolbar is placed in the vertical alignment widget texts are still centred. I thought that making these alignable might be more aesthically pleasing. I didn't complete the job, but I did glean a little bit more on just how to access widget private data. It all seems to pivot around the G_TYPE_INSTANCE_GET_PRIVATE macro.

#if 1
/* ATTEMPT TO LEFT ALIGN BUTTON TEXT */

struct _GtkToolButtonPrivate
{
  GtkWidget *button;
  gchar *stock_id;
  gchar *icon_name;
  gchar *label_text;
  GtkWidget *label_widget;
  GtkWidget *icon_widget;
  GtkSizeGroup *text_size_group;
  guint use_underline : 1;
  guint contents_invalid : 1;
};

typedef struct _GtkToolButtonPrivate GtkToolButtonPrivate;

struct _GtkToolButton
{
  GtkToolItem parent;
  /*< private >*/
  GtkToolButtonPrivate *GSEAL (priv);
};


#define GTK_TOOL_BUTTON_GET_PRIVATE(obj)(G_TYPE_INSTANCE_GET_PRIVATE ((obj), GTK_TYPE_TOOL_BUTTON, GtkToolButtonPrivate))

GtkToolButton      *button;
GtkToolButtonPrivate *priv;

priv = GTK_TOOL_BUTTON_GET_PRIVATE (para->item);

GtkWidget *label = priv->label_widget;

gtk_misc_set_alignment (label,0.0,0.5);

#endif