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Term::Choose::Util cpan:KUERBIS last updated on 2022-06-08

README.md
[![Build Status](https://travis-ci.org/kuerbis/Term-Choose-Util-p6.svg?branch=master)](https://travis-ci.org/kuerbis/Term-Choose-Util-p6)

NAME
====

Term::Choose::Util - TUI-related functions for selecting directories, files, numbers and subsets of lists.

DESCRIPTION
===========

This module provides TUI-related functions for selecting directories, files, numbers and subsets of lists.

CONSTRUCTOR
===========

The constructor method `new` can be called with optional named arguments:

        my $new = Term::Choose::Util.new( :mouse( 1 ), ... )

ROUTINES
========

Values in brackets are default values.

### Options available for all subroutines

  * back

Customize the string of the menu entry "back".

Default: `BACK`

  * clear-screen

If enabled, the screen is cleared before the output.

Values: [0],1.

  * color

Enables the support for color and text formatting escape sequences.

Setting color to 1 enables the support for color and text formatting escape sequences except for the current selected element. If set to 2, also for the current selected element the color support is enabled (inverted colors).

Values: [0],1,2.

  * confirm

Customize the string of the menu entry "confirm".

Default: `CONFIRM`.

  * cs-label

The value of *cs-label* (current selection label) is a string which is placed in front of the current selection.

Defaults: `choose-directories`: 'Chosen Dirs: ', `choose-a-directory`: 'Directory: ', `choose-a-file`: 'File: '. For `choose-a-number`, `choose-a-subset` and `settings-menu` the default is undefined.

The current-selection output is placed between the info string and the prompt string.

  * hide-cursor

Hide the cursor

Values: 0,[1].

  * info

A string placed on top of of the output.

Default: undef

  * margin

The option *margin* allows one to set a margin on all four sides.

*margin* expects a reference to an array with four elements in the following order:

- top margin (number of terminal lines)

- right margin (number of terminal columns)

- botton margin (number of terminal lines)

- left margin (number of terminal columns)

*margin* does not affect the *info* string. To add margins to the *info* string see *tabs-info*.

*margin* changes the default values of *tabs-prompt*.

Allowed values: 0 or greater. Elements beyond the fourth are ignored.

Default: undef

  * mouse

Enable the mouse mode. An item can be chosen with the left mouse key, the right mouse key can be used instead of the SpaceBar key.

Values: [0],1.

  * prompt

A string placed on top of the available choices.

Default: undef

  * save-screen

0 - off (default)

1 - use the alternate screen

  * tabs-info

The option *tabs-info* allows one to insert spaces at the beginning and the end of *info* lines.

*tabs-info* expects a reference to an array with one to three elements:

- the first element (initial tab) sets the number of spaces inserted at beginning of paragraphs

- the second element (subsequent tab) sets the number of spaces inserted at the beginning of all broken lines apart from the beginning of paragraphs

- the third element sets the number of spaces used as a right margin.

Allowed values: 0 or greater. Elements beyond the third are ignored.

default: If *margin* is set, the initial-tab and the subsequent-tab are set to left-*margin* and the right margin is set to right-*margin*. If *margin* is not defined, the default is undefined.

  * tabs-prompt

The option *tabs-prompt* allows one to insert spaces at the beginning and the end of the current-selection and *prompt* lines.

*tabs-prompt* expects a reference to an array with one to three elements:

- the first element (initial tab) sets the number of spaces inserted at beginning of paragraphs

- the second element (subsequent tab) sets the number of spaces inserted at the beginning of all broken lines apart from the beginning of paragraphs

- the third element sets the number of spaces used as a right margin.

Allowed values: 0 or greater. Elements beyond the third are ignored.

default: If *margin* is set, the initial-tab and the subsequent-tab are set to left-*margin* and the right margin is set to right-*margin*. `choose-directories` and `choose-a-subset`: +2 for the subsequent-tab. Else the default is undefined.

choose-a-directory
------------------

        my $chosen-directory = choose-a-directory( :1layout, ... )

With `choose-a-directory` the user can browse through the directory tree and choose a directory which is returned.

To move around in the directory tree:

- select a directory and press `Return` to enter in the selected directory.

- choose the "parent-dir" menu entry to move upwards.

To return the current working-directory as the chosen directory choose the "confirm" menu entry.

The "back" menu entry causes `choose-a-directory` to return nothing.

Following options can be set:

  * alignment

Elements in columns are aligned to the left if set to 0, aligned to the right if set to 1 and centered if set to 2.

Values: [0],1,2.

  * init-dir

Set the starting point directory. Defaults to the home directory (`$*HOME`).

  * layout

See the option *layout* in [Term::Choose](https://github.com/kuerbis/Term-Choose-p6)

Values: 0,[1],2.

  * order

If set to 1, the items are ordered vertically else they are ordered horizontally.

This option has no meaning if *layout* is set to 2.

Values: 0,[1].

  * parent-dir

Customize the string of the menu entry "parent-dir".

Default: `..`

  * show-hidden

If enabled, hidden directories are added to the available directories.

Values: 0,[1].

  * [Options available for all subroutines](#Options available for all subroutines)

choose-a-file
-------------

        my $chosen-file = choose-a-file( :1layout, ... )

Choose the file directory and then choose a file from the chosen directory. To return the chosen file select the "*confirm*" menu entry.

Options as in [choose-a-directory](#choose-a-directory) plus

  * filter

If set, the value of this option is treated as a regex pattern.

Only files matching this pattern will be displayed.

The regex pattern is used as the value of `dir`s `:test` parameter.

choose-directories
------------------

        my @chosen-directories = choose-directories( :1layout, ... )

`choose-directories` is similar to `choose-a-directory` but it is possible to return multiple directories.

Options as in [choose-a-directory](#choose-a-directory).

choose-a-number
---------------

        my $number = choose-a-number( 5, :cs-label<Testnumber>, ... );

This function lets you choose/compose a number (unsigned integer) which is then returned.

The fist argument is an integer and determines the range of the available numbers. For example setting the first argument to `4` would offer a range from `0` to `9999`. If not set, it defaults to `7`.

Options:

  * default-number

Set a default number (unsigned integer in the range of the available numbers).

Default: undef

  * small-first

Put the small number ranges on top.

  * thousands-separator

Sets the thousands separator.

Default: `,`

  * [Options available for all subroutines](#Options available for all subroutines)

choose-a-subset
---------------

        my $subset = choose-a-subset( @available-items, :1layout, ... )

`choose-a-subset` lets you choose a subset from a list.

The subset is returned as an array.

The first argument is the list of choices.

Options:

  * all-by-default

If enabled, all elements are selected if `CONFIRM` is chosen without any selected elements.

  * alignment

Elements in columns are aligned to the left if set to 0, aligned to the right if set to 1 and centered if set to 2.

Values: [0],1,2.

  * index

If true, the index positions in the available list of the made choices are returned.

Values: [0],1.

  * keep-chosen

If enabled, the chosen items are not removed from the available choices.

Values: [0],1;

  * layout

See the option *layout* in [Term::Choose](Term::Choose).

Values: 0,1,2,[3].

  * mark

Expects as its value a reference to an array with indexes. Elements corresponding to these indexes are pre-selected when `choose-a-subset` is called.

  * order

If set to 1, the items are ordered vertically else they are ordered horizontally.

This option has no meaning if *layout* is set to 3.

Values: 0,[1].

  * prefix

*prefix* expects as its value a string. This string is put in front of the elements of the available list in the menu. The chosen elements are returned without this *prefix*.

Default: empty string.

  * cs-begin

Info output: the *cs-begin* string is placed between the *cs-label* string and the chosen elements as soon as an element has been chosen.

Default: empty string

  * cs-separator

Info output: *cs-separator* is placed between the chosen list elements.

Default: `,`

  * cs-end

Info output: as soon as elements have been chosen the *cs-end* string is placed at the end of the chosen elements.

Default: empty string

  * [Options available for all subroutines](#Options available for all subroutines)

To return the chosen subset select the "confirm" menu entry.

The "back" menu entry removes the last added chosen items. If the list of chosen items is empty, "back" causes `choose-a-subset` to return nothing.

settings-menu
-------------

        my @menu = (
            ( 'enable-logging', "- Enable logging", ( 'NO', 'YES' )   ),
            ( 'case-sensitive', "- Case sensitive", ( 'NO', 'YES' )   ),
            ( 'attempts',       "- Attempts"      , ( '1', '2', '3' ) )
        );

        my %config = (
            'enable-logging' => 0,
            'case-sensitive' => 1,
            'attempts'       => 2
        );

        settings-menu( @menu, %config, :1mouse, ... );

The first argument is a list of lists. Each of the lists have three elements:

    the option name

    the prompt string

    a list of the available values for the option

The second argument is a hash:

    the hash key is the option name

    the hash value (zero based index) sets the current value for the option.

This hash is edited in place: the changes made by the user are saved in this hash.

Options:

  * cs-begin

Info output: the *cs-begin* string is placed between the *cs-label* string and the key-value pairs.

Default: empty string

  * cs-separator

Info output: *cs-separator* is placed between the key-value pairs.

Default: `,`

  * cs-end

Info output: the *cs-end* string is placed at the end of the key-value pairs.

Default: empty string

  * [Options available for all subroutines](#Options available for all subroutines)

The info output line is only shown if the option *cs-label* is set to a defined value.

When `settings-menu` is called, it displays for each list entry a row with the prompt string and the current value.

It is possible to scroll through the rows. If a row is selected, the set and displayed value changes to the next.After scrolling through the list once the cursor jumps back to the top row.

If the "back" menu entry is chosen, `settings-menu` does not apply the made changes and returns nothing. If the "confirm" menu entry is chosen, `settings-menu` applies the made changes in place to the passed configuration hash (second argument) and returns the number of made changes.

AUTHOR
======

Matthäus Kiem <[email protected]>

CREDITS
=======

Thanks to the people from [Perl-Community.de](http://www.perl-community.de), from [stackoverflow](http://stackoverflow.com) and from [#perl6 on irc.freenode.net](irc://irc.freenode.net/#perl6) for the help.

LICENSE AND COPYRIGHT
=====================

Copyright 2016-2022 Matthäus Kiem.

This library is free software; you can redistribute it and/or modify it under the Artistic License 2.0.