// // Input header file for the Fast Light Tool Kit (FLTK). // // Copyright 1998-2023 by Bill Spitzak and others. // // This library is free software. Distribution and use rights are outlined in // the file "COPYING" which should have been included with this file. If this // file is missing or damaged, see the license at: // // https://www.fltk.org/COPYING.php // // Please see the following page on how to report bugs and issues: // // https://www.fltk.org/bugs.php // /* \file Fl_Input widget . */ #ifndef Fl_Input_H #define Fl_Input_H #include "Fl_Input_.H" /** This is the FLTK text input widget. It displays a single line of text and lets the user edit it. Normally it is drawn with an inset box and a white background. The text may contain any characters, and will correctly display any UTF text, using ^X notation for unprintable control characters. It assumes the font can draw any characters of the used scripts, which is true for standard fonts under Windows and Mac OS X. Characters can be input using the keyboard or the character palette/map. Character composition is done using dead keys and/or a compose key as defined by the operating system.

Keyboard and mouse bindings.
Mouse button 1 Moves the cursor to this point. Drag selects characters. Double click selects words. Triple click selects all line. Shift+click extends the selection. When you select text it is automatically copied to the selection buffer.
Mouse button 2 Insert the selection buffer at the point clicked. You can also select a region and replace it with the selection buffer by selecting the region with mouse button 2.
Mouse button 3 Currently acts like button 1.
Backspace Deletes one character to the left, or deletes the selected region.
Delete Deletes one character to the right, or deletes the selected region. Combine with Shift for equivalent of ^X (copy+cut).
Enter May cause the callback, see when().

Keyboard and mouse bindings.
Mouse button 1	Moves the cursor to this point. Drag selects characters. Double click selects words. Triple click selects all line. Shift+click extends the selection. When you select text it is automatically copied to the selection buffer.
Mouse button 2	Insert the selection buffer at the point clicked. You can also select a region and replace it with the selection buffer by selecting the region with mouse button 2.
Mouse button 3	Currently acts like button 1.
Backspace	Deletes one character to the left, or deletes the selected region.
Delete	Deletes one character to the right, or deletes the selected region. Combine with Shift for equivalent of ^X (copy+cut).
Enter	May cause the callback, see when().

Platform specific keyboard bindings.
Windows/Linux Mac Function
^A Command-A Selects all text in the widget.
^C Command-C Copy the current selection to the clipboard.
^I ^I Insert a tab.
^J ^J Insert a Line Feed.
(Similar to literal 'Enter' character)
^L ^L Insert a Form Feed.
^M ^M Insert a Carriage Return.
^V,
Shift-Insert Command-V Paste the clipboard.
(Macs keyboards don't have "Insert" keys, but if they did, Shift-Insert would work)
^X,
Shift-Delete Command-X,
Shift-Delete Cut.
Copy the selection to the clipboard and delete it. (If there's no selection, Shift-Delete acts like Delete)
^Z Command-Z Undo.
This is a single-level undo mechanism, but all adjacent deletions and insertions are concatenated into a single "undo". Often this will undo a lot more than you expected.
Shift-^Z Shift-Command-Z Redo.
Currently same behavior as ^Z. Reserved for future multilevel undo/redo.
Arrow Keys Arrow Keys Standard cursor movement.
Can be combined with Shift to extend selection.
Home Command-Up,
Command-Left Move to start of line.
Can be combined with Shift to extend selection.
End Command-Down,
Command-Right Move to end of line.
Can be combined with Shift to extend selection.
Ctrl-Home Command-Up,
Command-PgUp,
Ctrl-Left Move to top of document/field.
In single line input, moves to start of line. In multiline input, moves to start of top line. Can be combined with Shift to extend selection.
Ctrl-End Command-End,
Command-PgDn,
Ctrl-Right Move to bottom of document/field.
In single line input, moves to end of line. In multiline input, moves to end of last line. Can be combined with Shift to extend selection.
Ctrl-Left Alt-Left Word left.
Can be combined with Shift to extend selection.
Ctrl-Right Alt-Right Word right.
Can be combined with Shift to extend selection.
Ctrl-Backspace Alt-Backspace Delete word left.
Ctrl-Delete Alt-Delete Delete word right.
*/ class FL_EXPORT Fl_Input : public Fl_Input_ { friend class Fl_Screen_Driver; friend class Fl_Cocoa_Screen_Driver; // Not ideal, but probably no other platform will use it int shift_position(int p); int shift_up_down_position(int p); void handle_mouse(int keepmark=0); // Private keyboard functions int kf_lines_up(int repeat_num); int kf_lines_down(int repeat_num); int kf_page_up(); int kf_page_down(); int kf_insert_toggle(); int kf_delete_word_right(); int kf_delete_word_left(); int kf_delete_sol(); int kf_delete_eol(); int kf_delete_char_right(); int kf_delete_char_left(); int kf_move_sol(); int kf_move_eol(); int kf_clear_eol(); int kf_move_char_left(); int kf_move_char_right(); int kf_move_word_left(); int kf_move_word_right(); int kf_move_up_and_sol(); int kf_move_down_and_eol(); int kf_top(); int kf_bottom(); int kf_select_all(); int kf_undo(); int kf_redo(); int kf_copy(); int kf_paste(); int kf_copy_cut(); protected: void draw() FL_OVERRIDE; int handle_key(); public: int handle(int) FL_OVERRIDE; Fl_Input(int,int,int,int,const char * = 0); }; #endif

Windows/Linux	Mac	Function
^A	Command-A	Selects all text in the widget.
^C	Command-C	Copy the current selection to the clipboard.
^I	^I	Insert a tab.
^J	^J	Insert a Line Feed. (Similar to literal 'Enter' character)
^L	^L	Insert a Form Feed.
^M	^M	Insert a Carriage Return.
^V, Shift-Insert	Command-V	Paste the clipboard. (Macs keyboards don't have "Insert" keys, but if they did, Shift-Insert would work)
^X, Shift-Delete	Command-X, Shift-Delete	Cut. Copy the selection to the clipboard and delete it. (If there's no selection, Shift-Delete acts like Delete)
^Z	Command-Z	Undo. This is a single-level undo mechanism, but all adjacent deletions and insertions are concatenated into a single "undo". Often this will undo a lot more than you expected.
Shift-^Z	Shift-Command-Z	Redo. Currently same behavior as ^Z. Reserved for future multilevel undo/redo.
Arrow Keys	Arrow Keys	Standard cursor movement. Can be combined with Shift to extend selection.
Home	Command-Up, Command-Left	Move to start of line. Can be combined with Shift to extend selection.
End	Command-Down, Command-Right	Move to end of line. Can be combined with Shift to extend selection.
Ctrl-Home	Command-Up, Command-PgUp, Ctrl-Left	Move to top of document/field. In single line input, moves to start of line. In multiline input, moves to start of top line. Can be combined with Shift to extend selection.
Ctrl-End	Command-End, Command-PgDn, Ctrl-Right	Move to bottom of document/field. In single line input, moves to end of line. In multiline input, moves to end of last line. Can be combined with Shift to extend selection.
Ctrl-Left	Alt-Left	Word left. Can be combined with Shift to extend selection.
Ctrl-Right	Alt-Right	Word right. Can be combined with Shift to extend selection.
Ctrl-Backspace	Alt-Backspace	Delete word left.
Ctrl-Delete	Alt-Delete	Delete word right.