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

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 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 dirs :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-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.

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, from stackoverflow and from #perl6 on irc.freenode.net for the help.

LICENSE AND COPYRIGHT

Copyright 2016-2023 Matthäus Kiem.

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