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Term::Choose::Util cpan:KUERBIS last updated on 2019-06-06


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Term::Choose::Util - CLI related functions.


This module provides some CLI related functions.


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

    my $new = :mouse(1), ... )


Values in brackets are default values.

Options valid for all routines

Set the string for the back menu entry.

Default: "<<".

If set to 1, the screen is cleared before printing the choices.

If set to 2, the "alternate screen" is used.


Set the string for the confirm menu entry.

Default: "OK".

Values: 0,[1].

A string placed on top of of the output.

Set to 0 the mouse mode is disabled, set to 1 the mouse mode is enabled.

Values: [0],1.

If set, shows an additionally prompt line before the list of choices.


    $chosen_directory = choose-a-dir( :layout(1), ... )

With choose-a-dir the user can browse through the directory tree (as far as the granted rights permit it) and choose a directory which is returned.

To move around in the directory tree:

To return the current working-directory as the chosen directory choose "OK".

The "back"-menu-entry (ltlt) causes choose-a-dir to return nothing.

Following options can be set:

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

If set to 1, the default cursor position is on the "up" menu entry. If the directory name remains the same after an user input, the default cursor position changes to "back".

If set to 0, the default cursor position is on the "back" menu entry.

Values: 0,[1].

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

Values: [0],1,2.

See the option layout in Term::Choose

Values: 0,[1],2.

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].

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

Values: 0,[1].


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

Browse the directory tree like with choose-a-dir. Select "gtF" to get the files of the current directory. To return the chosen file select "OK".

See choose-a-dir for the different options.


    @chosen_directories = choose-dirs( :layout(1), ... )

choose-dirs is similar to choose-a-dir but it is possible to return multiple directories.

"++" adds the current directory to the list of chosen directories and "OK" returns the chosen list of directories.

The "back"-menu-entry (ltlt) removes the last added directory. If the list of chosen directories is empty, "ltlt" causes choose-dirs to return nothing.

choose-dirs uses the same option as choose-a-dir. The option prompt can be used to put empty lines between the header rows and the menu: an empty string ('') means no newline, a space (' ') one newline, a newline (\n) two newlines.


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

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

The fist argument - "digits" - is an integer and determines the range of the available numbers. For example setting the first argument to 6 would offer a range from 0 to 999999. If not set, it defaults to 7.

The available options:

The string put in front of the build number seen in the prompt line.

Default: empty string ('');

Put the small number ranges on top.

Values: [0],1.

Sets the thousands separator.

Default: comma (,).


    $subset = choose-a-subset( @available_items, :layout( 1 ), ... )

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.


If true, the made choices are returned as list-index positions.

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

Values: [0],1,2.

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

Values: [0],1.

See the option layout in Term::Choose.

Values: 0,1,[2].

Expects as its value a list of indexes. Elements corresponding to these indexes are preselected when choose-a-subset is called.

The value of name is a string. It is placed in front of the subset-info-output.

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].

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

The default value is "-" if the layout is 2 else the default is the empty string ('').

The value of sofar-begin is a string.

Subset-info-output: sofar-begin is placed between the name string and the chosen elements as soon as an element has been chosen.

Default: empty

The value of sofar-separator is a string.

Subset-info-output: sofar-separator is placed between the chosen list elements.

Default: ,

The value of sofar-end is a string.

Subset-info-output: as soon as elements have been chosen sofar-end if placed at the end of the chosen elements.

Default: empty


    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.

The options are passed as named arguments. See Options valid for all routines(#Options valid for all routines).

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. If the end of the list of the values is reached, it begins from the beginning of the list.


Matthäus Kiem [email protected]


Thanks to the people from, from stackoverflow and from #perl6 on for the help.


Copyright 2016-2019 Matthäus Kiem.

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