NAME
TUI::Drivers::Util - utility functions for keyboard and event handling
SYNOPSIS
use TUI::Drivers::Util qw(
cstrlen
ctrlToArrow
getAltChar
getAltCode
getCtrlChar
getCtrlCode
);
my $len = cstrlen($string);
my $arrow = ctrlToArrow($keyCode);
my $altCode = getAltCode('X');
my $altChar = getAltChar($altCode);
my $ctrlCode = getCtrlCode('C');
my $ctrlChar = getCtrlChar($ctrlCode);DESCRIPTION
TUI::Drivers::Util provides a collection of low-level helper functions used by the Turbo Vision driver and event system.
The functions in this module operate on key codes and character values and are used to translate between control, alternate, and normal key representations. They are intended for internal use by event processing and input handling code.
This module is purely functional and does not define any objects.
Commonly Used Features
Typical usage falls into three groups: converting control-key navigation shortcuts to arrow/navigation key codes via ctrlToArrow(), translating between Alt key codes and characters via getAltCode()/getAltChar(), and translating between Ctrl key codes and characters via getCtrlCode()/getCtrlChar().
cstrlen() is commonly used when text contains Turbo Vision marker characters (for example ~) and a marker-aware length is needed.
FUNCTIONS
cstrlen
my $len = cstrlen($string);Returns the length of a string up to the first null character.
This function behaves like the C runtime strlen and is useful when working with strings that may contain embedded null characters.
ctrlToArrow
my $keyCode = ctrlToArrow($keyCode);Maps certain control key codes to their corresponding arrow key codes.
If the key code does not represent a convertible control key, it is returned unchanged.
getAltChar
my $char = getAltChar($keyCode);Returns the character associated with an Alt-modified key code.
If the key code does not represent an Alt-modified character, the return value is undefined.
getAltCode
my $keyCode = getAltCode($char);Returns the Alt-modified key code corresponding to the given character.
getCtrlChar
my $char = getCtrlChar($keyCode);Returns the character associated with a Ctrl-modified key code.
getCtrlCode
my $keyCode = getCtrlCode($char);Returns the Ctrl-modified key code corresponding to the given character.
SEE ALSO
TUI::Drivers::Const, TUI::Drivers::Event
AUTHORS
- Borland International (original Turbo Vision design)
- J. Schneider <brickpool@cpan.org> (Perl implementation and maintenance)
COPYRIGHT AND LICENSE
Copyright (c) 1990-1994, 1997 by Borland International
Copyright (c) 2021-2026 the "AUTHORS" as listed above.
This software is licensed under the MIT license (see the LICENSE file, which is part of the distribution).