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Tickit::Widget::Entry(3pm) User Contributed Perl Documentation Tickit::Widget::Entry(3pm)

NAME

"Tickit::Widget::Entry" - a widget for entering text

SYNOPSIS

 use Tickit;
 use Tickit::Widget::Entry;

 my $entry = Tickit::Widget::Entry->new(
    on_enter => sub {
       my ( $self, $line ) = @_;

       # process $line somehow

       $self->set_text( "" );
    },
 );

 Tickit->new( root => $entry )->run;

DESCRIPTION

This class provides a widget which allows the user to enter a line of text.

STYLE

The default style pen is used as the widget pen. The following style pen prefixes are also used:
more => PEN
The pen used for the "more" scroll markers

The following style keys are used:

more_left => STRING
more_right => STRING
The text used to indicate that there is more content scrolled to the left or right, respectively

KEYBINDINGS

The following keys are bound by default
  • Ctrl-K

    Delete the entire line

  • Ctrl-U

    Delete to the start of the line

  • Ctrl-W or Ctrl-Backspace

    Delete one word backwards

  • Backspace

    Delete one character backwards

  • Delete

    Delete one character forwards

  • Ctrl-Delete

    Delete one word forwards

  • End or Ctrl-E

    Move the cursor to the end of the input line

  • Enter

    Accept a line of input by running the "on_enter" action

  • Home or Ctrl-A

    Move the cursor to the beginning of the input line

  • Insert

    Toggle between overwrite and insert mode

  • Left

    Move the cursor one character left

  • Ctrl-Left or Alt-B

    Move the cursor one word left

  • Right

    Move the cursor one character right

  • Ctrl-Right or Alt-F

    Move the cursor one word right

CONSTRUCTOR

$entry = Tickit::Widget::Entry->new( %args )

Constructs a new "Tickit::Widget::Entry" object.

Takes the following named arguments:

text => STR
Optional. Initial text to display in the box
position => INT
Optional. Initial position of the cursor within the text.
on_enter => CODE
Optional. Callback function to invoke when the "<Enter>" key is pressed.

ACCESSORS

$on_enter = $entry->on_enter

$entry->set_on_enter( $on_enter )

Return or set the CODE reference to be called when the "key_enter_line" action is invoked; usually bound to the "Enter" key. 

 $on_enter->( $entry, $line )

$offset = $entry->position

Returns the current entry position, in terms of characters within the text.

$entry->set_position( $position )

Set the text entry position, moving the cursor

METHODS

$entry->bind_keys( $keystr => $value, ... )

Associate methods or CODE references with keypresses. On receipt of a the key the method or CODE reference will be invoked, being passed the stringified key representation and the underlying "Term::TermKey::Key" structure. 

 $ret = $entry->method( $keystr, $key )
 $ret = $coderef->( $entry, $keystr, $key )

This method takes a hash of keystring/value pairs. Binding a value of "undef" will remove it.

TEXT MODEL METHODS

These methods operate on the text input buffer directly, updating the stored text and changing the rendered display to reflect the changes. They can be used by a program to directly manipulate the text.

$text = $entry->text

Returns the currently entered text.

$entry->set_text( $text )

Replace the text in the entry box. This completely redraws the widget's window. It is largely provided for initialisation; for normal edits (such as from keybindings), it is preferable to use "text_insert", "text_delete" or "text_splice".

$entry->text_insert( $text, $pos_ch )

Insert the given text at the given character position.

$deleted = $entry->text_delete( $pos_ch, $len_ch )

Delete the given section of text. Returns the deleted text.

$deleted = $entry->text_splice( $pos_ch, $len_ch, $text )

Replace the given section of text with the given replacement. Returns the text deleted from the section.

$pos = $entry->find_bow_forward( $initial, $else )

Search forward in the string, returning the character position of the next beginning of word from the initial position. If none is found, returns $else.

$pos = $entry->find_eow_forward( $initial )

Search forward in the string, returning the character position of the next end of word from the initial position. If none is found, returns the length of the string.

$pos = $entry->find_bow_backward( $initial )

Search backward in the string, returning the character position of the previous beginning of word from the initial position. If none is found, returns 0.

$pos = $entry->find_eow_backward( $initial )

Search backward in the string, returning the character position of the previous end of word from the initial position. If none is found, returns "undef".

TODO

  • Plugin ability

    Try to find a nice way to allow loaded plugins, possibly per-instance if not just globally or per-class. See how many of these TODO items can be done using plugins.

  • More readline behaviours

    History. Isearch. History replay. Transpose. Transcase. Yank ring. Numeric prefixes.

  • Visual selection behaviour

    Shift-movement, or vim-style. Mouse.

AUTHOR

Paul Evans <leonerd@leonerd.org.uk>
2018-07-30 perl v5.26.2