RE: [boost] GUI library - another one

From: Hurd, Matthew (hurdm_at_[hidden])
Date: 2004-03-04 00:03:20

> -----Original Message-----
> From: boost-bounces_at_[hidden]
[mailto:boost-bounces_at_[hidden]]
> On Behalf Of Shannon Stewman
> Sent: Thursday, 4 March 2004 2:42 PM
> To: boost_at_[hidden]
> Subject: Re: [boost] GUI library - another one
> 
> On Wed, Mar 03, 2004 at 10:30:47PM -0500, Hurd, Matthew wrote:
> > > On Behalf Of Beman Dawes
> >
> > <snip>
> >
> > > Even the "why not" version seems overly complex compared to a
console
> > > iostreams "Hello, world". Why not just:
> > >
> > >       winout << title("Example window") << button("Hello, world!")
> > >              << wait_for(delete_signal);
> > >
> > > I'm not necessarily pushing that exact approach, but just pointing
out
> > > more
> > > C++-like alternatives.
> >
> > I understand you're not pushing that approach.  It couldn't quite
work
> > like that as you're trying to structure a tree rather than a
sequence.
> 
> This is beside the point.  Trees are isomorphic to lists that contain
> lists.  For example:
> 
> winout << title("Example window")
>        << divider(2) << up << ( panel << vertical
>                                       << label("Hello, world!")
> 				      << textentry("Name: ") )
>                      << down << ( panel << horizontal
> 		                        << button("OK")
> 					<< button("Cancel") );
> 
> Which, assuming my parens are right, could give you something
> like:
> 
> +---------------------------------------------+
> |     Hello, world!                           |
> |     Name: ____________________________      |
> +---------------------------------------------+
> |      /-------\         /--------\           |
> |      |  OK   |         | Cancel |           |
> |      \-------/         \--------/           |
> +---------------------------------------------+
> 

For sure, to be sure.  Not sure I like the approach though.  You could
off add and << as alternative for the same thing.

I see that you could have multiple properties for the same container by
having the result as the container too.

        Some_widget << colour_red << width(pixel(100)) << text_box <<
font("Arial") << height(millimetres(8));

Not unreasonable and you could format it like

    Some_window
        << ( 
            some_widget
                << colour_red
                 << width(pixel(100))
                << some_other_property
           )
        << ( 
            panel 
                << horizontal
                << ( 
                      button("OK")
                      << click_event( dooby_doo::on_click )
                   )
                << button("Cancel")
           )
    ;

Not as bad as I thought before I started typing this mail... 

Regards,

Matt Hurd
_______________________

Susquehanna Pacific P/L
hurdm_at_[hidden]
+61.2.8226.5029
_______________________

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