GTK+ By Example/Glib/GObject

See the GObject Developer Docs.

See creating a Gobject for an example on deriving objects.

GObject is implemented in Glib and builds Objects in run-time (unlike C++ and many other object oriented languages which do this at compile tim).

• similar to C++, using vtables.
• explicit upcasting and downcasting.
• Capable of meeting the three tenets of OOP. (See The Wikipedia Article).

Example

create a person that says "hi my name is xxx". when person::talk is implemented

create an example dr_phil that inherits from person and says "And hows that working for you?" when person::talk is called.

this should provide us with deriving a first object, which is a pain to learn. and how inheritance works in Glib.

What needs to be explained

• type check and type cast macros
• the purpose of get type
• the order in which objects are instantiated
  • creating object
  • construct and desctructor methods
  • the difference between class and instance
  • virtual functions