/ 
TUI-Vision-2.000_004
/ TUI::Drivers::Const

NAME

TUI::Drivers::Const - constants for driver and event handling

SYNOPSIS

use TUI::Drivers::Const qw(:all);

# or import specific constant groups
use TUI::Drivers::Const qw(:evXXXX :kbXXXX);

DESCRIPTION

TUI::Drivers::Const defines constants used by the TVision driver layer.

The constants in this module are grouped by purpose and exported via tag-based export groups. They are used by the event system, keyboard and mouse handling, screen and video mode selection, and low-level driver logic.

This module only defines constants. The semantic meaning and practical usage of these constants is documented in higher-level driver modules such as TUI::Drivers::Event, TUI::Drivers::Screen, and TUI::Drivers::HardwareInfo.

CONSTANTS

Event type constants (evXXXX)

Event type and event mask constants used by the TVision event system.

These constants identify mouse, keyboard, command, broadcast, and message events and are used when dispatching and filtering events.

Mouse button state constants (mbXXXX)

Constants describing mouse button states.

These values are used to identify which mouse buttons are pressed during a mouse event.

Mouse event flag constants (meXXXX)

Constants describing additional mouse event attributes, such as movement and double-click detection.

Screen mode constants (smXXXX)

Constants defining supported screen and video modes.

These values are used by the screen and display drivers to select the active video configuration.

Keyboard code constants (kbXXXX)

Constants representing keyboard input codes and modifier states.

These include control key combinations, function keys, extended keys, and keyboard state masks. They are used by the keyboard and event handling logic to interpret raw input.

Style masks constants (slXXXX)

Constants representing text style attributes for screen cells.

These values are used to define bold, italic, underline, blink, reverse, and strike-through text styles. They are used in conjunction with color attributes to control the appearance of text in the user interface.

EXPORT TAGS

Constants are exported using the following tag-based export groups:

  • :evXXXX - event types and event masks

  • :mbXXXX - mouse button state flags

  • :meXXXX - mouse event flags

  • :smXXXX - screen and video mode constants

  • :kbXXXX - keyboard codes and modifier flags

  • :all - import all constants

SEE ALSO

TEvent, TScreen, TDisplay, THardwareInfo

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) 2026 the "AUTHORS" as listed above.

This software is licensed under the MIT license (see the LICENSE file, which is part of the distribution).

ACKNOWLEDGEMENTS

Style mask constants and their usage are not part of the original Turbo Vision design by Borland International. The constants are taken from "A modern port of Turbo Vision 2.0", which is licensed under the MIT License.