Re: Object Orientation in GTK

[Matthew Ettus <ettus earthlink net>]

Isn't this essentially like global variables?  Just because you throw
them all into a structure, it is essentially the same, right?
Matt



Havoc Pennington wrote:
> 
> On Sat, 7 Nov 1998, Matthew Ettus wrote:
> >
> > On the other hand, it seems to encourage the use of global variables.
> > In many instances, I see no way of avoiding global variables.
> >
> 
> It's trivial; just use structs and methods that act on them.
> 
> /* define MyApp object */
> typedef struct _MyApp MyApp;
> 
> struct _MyApp {
>  GtkWidget* main_window;
>  /* other data too */
> };
> 
> void my_app_quit(MyApp* app);
> void my_app_foo(MyApp* app, MyFooData* foo);
> etc.
> 
> You can do everything with this that you could do with:
> class MyApp {
>  void quit();
> };
> 
> Though of course it will be less safe and involve more typing.
> 
> Plain structs are fairly limited as objects; if you want a "real" object
> you can make a GtkObject descendant. This gives you signals and
> inheritance and type checking.
> 
> Havoc
> 
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