NAME

Fl - Bindings for the Stable 1.3.x Branch of the Fast Light Toolkit

SYNOPSIS

use Fl qw[:execute];
my $window = Fl::Window->new(100, 100, 300, 180);
my $box = Fl::Box->new(20, 40, 260, 100, 'Hello, World');
#$box->labelfont(BOLD + ITALIC); # TODO
$box->labelsize(36);
#$box->labelfont(SHADOW_LABEL); # TODO
$window->end();
$window->show();
exit run();

DESCRIPTION

The Fl distribution includes bindings to the stable 1.3.x branch of the Fast Light Toolkit; a cross-platform GUI toolkit compatible with Microsoft Windows, MacOS X, and Linux/Unix platforms with X11. It was designed to be small, quick and comes with a very simple yet complete API.

Functions

The top level Fl namespace exports several functions sorted by type.

use Fl qw[:execute];

This would import functions related to application execution directly into your namespace. These functions include:

• run()

  As long as any windows are displayed, this calles Fl::wait() repeatedly.

  When all windows are closed, it returns zero.

• check()

  This is the same as calling Fl::wait(0).

  Calling this during (for example) a long calculation process will keep the screen up to date and the interface responsive without forking or threading.

  This returns non-zero if any windws are displayed. Otherwise, zero is returned.

• wait()

  Waits until 'something happens' and then returns.

  Call this repeatedly to 'run' your program. You can also check what happened each time after this returns which is quite useful for managing program state.

  What this really does is call all idle callbacks, all elapsed timeouts, call Fl::flush() to get the screen to update, and then wait some time (zero if the are idle callbacks, the sortest of all pending timeouts, or infinity) for any events from the user or any Fl::ad_fd() callbacks. It then handles the events and calls the callbacks and then returns.

  The return value of Fl::wait() is non-zero if there are any visible windows.

  Fl::wait($time) waits a maxium of $time seconds. It may return much sooner if something happens.

  The return value is positive if an event or fd happens before the time elapsed. It is zero if nothing happens (on Windows this will only return zero if $time is zero). It is negative if an error occurs (this will happen on X11 if a signal happens).

• ready()

  This is similar to Fl::check() except this does not call Fl::flush() or any callbacks, which is useful if your program is in a state where such callbacks are illegal.

  This returns true if Fl::check() would do anything (it will continue to return true until you call Fl::check() or Fl::wait()).

This list will grow.

Classes

Fl contains several widgets and other classes including:

• Fl::Box
• Fl::Window

This is the current list and will expand as the distribution develops.

LICENSE

Copyright (C) Sanko Robinson.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

AUTHOR

Sanko Robinson <sanko@cpan.org>