NAME

UI::Various::RichTerm::Listbox - concrete implementation of UI::Various::Listbox

SYNOPSIS

    # This module should never be used directly!
    # It is used indirectly via the following:
    use UI::Various::Listbox;

ABSTRACT

This module is the specific implementation of UI::Various::Listbox using the rich terminal UI.

DESCRIPTION

The documentation of this module is only intended for developers of the package itself.

Note that RichTerm's listboxes can only page forward

_Entry - helper class

_Entry is an internal helper class used to access the currently selectable entries of the listbox.

METHODS

_additional_active - return helper array of active entries

    my @active = $ui_element->_additional_active;

description:

Return a list of _Entry helper class elements for each visible line of the listbox (the listbox's height in total).

Note that those are in addition to the one of the listbox itself, which is used to page forward.

Also note that empty entries (when the height is greater than the amount of visible listbox entries) are silently ignored during processing in _process

returns:

helper array of active entries

_prepare - prepare UI element

    ($width, $height) = $ui_element->_prepare($content_width);

example:

    my ($w, $h) = $_->_prepare($content_width);
    $width < $w  and  $width = $w;
    $height += $h;

parameters:

    $content_width      preferred width of content

description:

Prepare output of the UI element by determining and returning the space it wants or needs. The method should only be called from UI::Various::RichTerm container elements!

returns:

width and height the UI element will require or need when printed

_show - return formatted UI element

    $string = $ui_element->_show($prefix, $width, $height, $pre_active);

example:

    my ($w, $h) = $_->_prepare($content_width);
    ...
    $_->_show('<1> ', $w, $h, $pre_active);

parameters:

    $prefix             text in front of first line
    $width              the width returned by _prepare above
    $height             the height returned by _prepare above
    $pre_active         format string for prefixes

description:

Return the formatted (rectangular) text box of the UI element. Its height will be exactly as specified, unless there hasn't been enough space. The weight is similarly as specified plus the width needed for the prefix. The method should only be called from UI::Various::RichTerm container elements!

returns:

the rectangular text box for UI element

_process - handle action of UI element

    $ui_element->_process;

description:

Handle the action of the UI element (aka select one of the radio buttons).

SEE ALSO

UI::Various, UI::Various::Listbox

LICENSE

Copyright (C) Thomas Dorner.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See LICENSE file for more details.

AUTHOR

Thomas Dorner <dorner (at) cpan (dot) org>

cpanm UI::Various

perl -MCPAN -e shell
install UI::Various