[boost] Re: Re: Re: [gui] GUI Taxonomy

From: Andy Little (andy_at_[hidden])
Date: 2004-12-31 07:17:12

"Alan Gutierrez" <alan-boost_at_[hidden]> wrote

>    Are we talking about the same thing? Interface and implentation
>    are overloaded terms.

// interface (ABC)
struct graphics_element{
    virtual void draw(Context c) =0;
};
// gui object..
struct my_wnd
: graphics_element,
size_handler,move_handler,draw_handler
 { void draw(Context c); ...};

//simple line definition...
template <typename Units>    //
struct simple_line{ point<Units> start,end;}

// dumb drawable line
template <typename Units>
struct drawable_line
 : simple_line<Units>, graphics_element{
    void draw(Context c);
    Units thickness;
    Color color;
};
template <typename Units>
struct active_line
 : drawable_line<Units>, user_action_handler,
draw_handler{..};

// text
struct text_element : graphics_element {..}
// edit box
struct active_text : text_element,user_action_handler,
draw_handler{..};

regards
Andy Little