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Author image Dmitry Karasik


Prima::InputLine - standard input line widget


        use Prima qw(InputLine Application);
        Prima::InputLine-> new( text => 'Hello world!');
        run Prima;


The class provides basic functionality of an input line, including hidden input, read-only state, selection, and clipboard operations. The input line text data is contained in text property.




The notification is called when the text property is changed, either interactively or as a result of direct call.


alignment INTEGER

One of the following ta:: constants, defining the text alignment:


Default value: ta::Left

autoHeight BOOLEAN

If 1, adjusts the height of the widget automatically when its font changes.

Default value: 1

autoSelect BOOLEAN

If 1, all the text is selected when the widget becomes focused.

Default value: 1


If 1, the keyboard kb::Left and kb::Right commands, if received when the cursor is at the beginning or at the end of text, and cannot be mover farther, not processed. The result of this is that the default handler moves focus to a neighbor widget, in a way as if the Tab key was pressed.

Default value: 0

borderWidth INTEGER

Width of 3d-shade border around the widget.

Default value: 2

charOffset INTEGER

Selects the position of the cursor in clusters starting from the beginning of visual text.


Selects the first visible cluster of text

insertMode BOOLEAN

Governs the typing mode - if 1, the typed text is inserted, if 0, the text overwrites the old text. When insertMode is 0, the cursor shape is thick and covers the whole character; when 1, it is of default width.

Default toggle key: Insert


The maximal length of the text, that can be stored into text or typed by the user.

Default value: 256

passwordChar CHARACTER

A character to be shown instead of the text letters when writeOnly property value is 1.

Default value: '*'

readOnly BOOLEAN

If 1, the text cannot be edited by the user.

Default value: 0

selection START, END

Two integers, specifying the beginning and the end of the selected text, in clusters. A case with no selection is when START equals END.

selStart INTEGER

Selects the start of text selection.


Selects the end of text selection.

textDirection BOOLEAN

If set, indicates RTL text input.

textLigation BOOLEAN

If set, text may be rendered at better quality with ligation and kerning, however that comes with a price that some ligatures may be indivisible and form clusters (f.ex. ff or ffi ligatures). Cursor cannot go inside of such clusters, and thus one can only select them, delete as whole, or press Del/Backspace on the cluster's edge.

Toggle during runtime with Ctrl+Shift+L.

wordDelimiters STRING

Contains string of character that are used for locating a word break. Default STRING value consists of punctuation marks, space and tab characters, and \xff character.

writeOnly BOOLEAN

If 1, the input is not shown but mapped to passwordChar characters. Useful for a password entry.

Default value: 0



Copies the selected text, if any, to the clipboard.

Default key: Ctrl+Insert


Cuts the selected text into the clipboard.

Default key: Shift+Delete


Removes the selected text.

Default key: Delete


Copies text from the clipboard and inserts it in the cursor position.

Default key: Shift+Insert


Selects all text

Bi-directional input and output

When working on bidirectional texts, or text represented by complex script shaping, methods firstChar, charOffset, selection etc cannot be used to calculate text offsets f.ex. via substr. Note that these values are in clusters, not in characters (see Prima::Drawable::Glyphs for the description>. Also, selection ranges of bidi text become not straighforward. Use the following methods whenever text manipulations are needed:

char_at OFFSET

Returns character at OFFSET


Returns range of characters covered by the selection.


Dmitry Karasik, <dmitry@karasik.eu.org>.


Prima, Prima::Widget, examples/edit.pl.