NAME

Term::Graille::IO

Allows user interaction in Graille Applications (or perhaps on any pterminal application). Depends on Term::ReadKey and Time::HiRes; When integrated with Term::Graille::Menu allows a modal drop down menu that

SYNOPSIS

my $io=Term::Graille::IO->new();
$io->addAction(                             # add action for key press
               "Am",                        # Am is returned for up arrow
              {note=>"up arrow:cursor up ", # For drawing a menu
               proc=>sub{my $self.@args)=@_ ...}  # the action
               } ); 
$io->run($io,@args);                        # start trapping keypresses
...
$io->stop();                                # stop
               

FUNCTIONS

my $io=Term::Graille::IO->new(%params)

Creates a new IO object for user interaction. Three modes are available; free, means the key presses are captured and not echoed, menu requires the setting of $io->{menu}, using $io->addMenu($menu), and normal when the key presses are read normally

my $io->addMenu($menu,$trigger)

Uses a topbar dropdown menu of class Term::Graille::Menu. If $trigger is specified that activates or deactivates the menu; if not specified the 'm' key activates the menu.

my $io->addAction($menu,$key,$actionData)

Determines what happens when a key is pressed in free mode. Functions in the users scripts have to be "fully qualified" e.g. &main::function()

    $io->addAction("s",{note=>"s key saves sprite",proc=>sub{
	   my ($self,$canvas,$sprite,$cursor)=@_; # these are the objects passed as parameters
	   &main::saveSprite($sprite);  
	   &main::flashCursor($sprite,$cursor);
	   &main::restoreIO();},}  );	
 

my $io->run($io,@objects)

Iniiating the capture of the key presses may trigger actions. These actions may need parameters including the $io object itself, it is useful to select all possible objects that may need to be passed to the anonymous subroutines added by addAction above.

my $io->startMenu()

Starts a menu as described in Term::Graille::Menu. The $io object enters a "menu" mode when Arrow, Enter and the Trigger key (see above) are passed to the Menu object

my $io->stopMenu()

Stops menu and returns to free mode

my $io->stop()

stops capturing key presses and enters normal mode. Useful for exeample, when the user needs to enter data