Redesign the library and related components.

This step is needed, since the current design is quite chaotic
and it would not be possible to finish the application.

There's still a lot to be done.

After this step, it's time to implement the rest of LdLua.

src/ld-symbol-category.h

@@ -27,33 +27,24 @@ G_BEGIN_DECLS
 	((obj), LD_SYMBOL_CATEGORY, LdSymbolCategoryClass))
 
 typedef struct _LdSymbolCategory LdSymbolCategory;
+typedef struct _LdSymbolCategoryPrivate LdSymbolCategoryPrivate;
 typedef struct _LdSymbolCategoryClass LdSymbolCategoryClass;
 
 
 /**
  * LdSymbolCategory:
- * @parent: The parent object, may be #LdLibrary
- * or another #LdSymbolCategory.
- * @name: The name of the category.
- * @image_path: Path to the image for this category.
- * @children: Children of this category.
- */
-/* TODO: Make the public fields private and set them as properties
- *       + implement setters and getters. On change the category
- *       shall emit a "changed" signal in the Library.
  */
 struct _LdSymbolCategory
 {
 /*< private >*/
 	GObject parent_instance;
-
-/*< public >*/
-	gpointer parent;
-	gchar *name;
-	gchar *image_path;
-	GHashTable *children;
+	LdSymbolCategoryPrivate *priv;
 };
 
+/* TODO: If required sometime, categories (and maybe symbols) should implement
+ *       a "changed" signal. This can be somewhat tricky. The library might be
+ *       a good candidate for what they call a proxy. See GtkUIManager.
+ */
 struct _LdSymbolCategoryClass
 {
 	GObjectClass parent_class;
@@ -62,13 +53,20 @@ struct _LdSymbolCategoryClass
 
 GType ld_symbol_category_get_type (void) G_GNUC_CONST;
 
-LdSymbolCategory *
-ld_symbol_category_new (LdLibrary *parent);
+LdSymbolCategory *ld_symbol_category_new (const gchar *name);
 
-/* TODO: Methods for inserting and removing children. */
-/* TODO: Create a separate ld-symbol-private.h, include it in this ld-s-c.c
- *       and then assign and ref the parent category here.
- */
+/* TODO: Create properties for "name" and "image_path". */
+void ld_symbol_category_set_name (LdSymbolCategory *self, const gchar *name);
+const gchar *ld_symbol_category_get_name (LdSymbolCategory *self);
+void ld_symbol_category_set_image_path (LdSymbolCategory *self,
+	const gchar *image_path);
+const gchar *ld_symbol_category_get_image_path (LdSymbolCategory *self);
+/* TODO: Implement. */
+void ld_symbol_category_insert_child (LdSymbolCategory *self,
+	GObject *child, gint pos);
+void ld_symbol_category_remove_child (LdSymbolCategory *self,
+	GObject *child);
+GSList *ld_symbol_category_get_children (LdSymbolCategory *self);
 
 
 G_END_DECLS