[Tickit-dev] Window->print span objects

[Paul LeoNerd Evans]

Hi all,

A while since I last wrote. Thought I'd throw together a quick note with
an idea I've had.

I've been trying to work out ways to make better mouse/keyboard/area
interaction with widgets. One thing I've been thinking on is using the
render method to somehow remember where parts of the widget actually are
onscreen, so that mouse/etc.. events can be associated with them. For
example, the Tickit::Widget::Tabbed::Ribbon when it prints the list of
tab names could do with remembering what is where, so it can easily
handle click events.

Last update of Tickit created

  http://search.cpan.org/~pevans/Tickit-0.21/lib/Tickit/Window.pm#$pos_=_$win->print(_$text,_$pen_)

to return a Tickit::StringPos object, so the caller can know the width
of text that was printed.

I'm wondering on having it return something fancier; a span object that
knows not only its size but also its position, and somehow persists if
it is stored somewhere(?), and could have a mouse event handler, or
other things, associated with it.

It would need to be mergeable though, so that multiple adjacent calls
would be combined.

  my $span = $win->print( "[" ) +
             $win->print( $name, $different_pen ) +
             $win->print( "]" );
  $span->set_on_mouse( sub { ... } );

Or perhaps, if that was deemed a bit expensive or not right, a window
could maintain a context;

 $win->start_span;
 $win->print( "[" );
 $win->print( $name, $different_pen );
 $win->print( "]" );

 my $span = $win->end_span;
 $span->...

-- 
Paul "LeoNerd" Evans

leonerd at leonerd.org.uk
ICQ# 4135350       |  Registered Linux# 179460
http://www.leonerd.org.uk/
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