X-Git-Url: http://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=doc%2Fhtml%2Fman%2Fcurs_getch.3x.html;h=297f2b1613f9a1eed83605c2fabd24b1d5816368;hp=76b20e49b4e9b4eb6a325dd912700594aa88f99f;hb=761e4f0825b330e970558e82a4bd638383914429;hpb=46722468f47c2b77b3987729b4bcf2321cccfd01
diff --git a/doc/html/man/curs_getch.3x.html b/doc/html/man/curs_getch.3x.html
index 76b20e49..297f2b16 100644
--- a/doc/html/man/curs_getch.3x.html
+++ b/doc/html/man/curs_getch.3x.html
@@ -1,8 +1,8 @@
-
+
@@ -41,10 +41,14 @@
+curs_getch(3x) curs_getch(3x)
+
+
+
NAME
- getch, wgetch, mvgetch, mvwgetch, ungetch, has_key - get
+ getch, wgetch, mvgetch, mvwgetch, ungetch, has_key - get
(or push back) characters from curses terminal keyboard
@@ -66,154 +70,152 @@
character from the window. In no-delay mode, if no input
is waiting, the value ERR is returned. In delay mode, the
program waits until the system passes text through to the
- program. Depending on the setting of cbreak, this is
- after one character (cbreak mode), or after the first new-
+ program. Depending on the setting of cbreak, this is af-
+ ter one character (cbreak mode), or after the first new-
line (nocbreak mode). In half-delay mode, the program
waits until a character is typed or the specified timeout
has been reached.
Unless noecho has been set, then the character will also
be echoed into the designated window according to the fol-
- lowing rules: If the character is the current erase char-
+ lowing rules: if the character is the current erase char-
acter, left arrow, or backspace, the cursor is moved one
space to the left and that screen position is erased as if
- delch had been called. If the character value is any
- other KEY_ define, the user is alerted with a beep call.
+ delch had been called. If the character value is any oth-
+ er KEY_ define, the user is alerted with a beep call.
Otherwise the character is simply output to the screen.
If the window is not a pad, and it has been moved or modi-
fied since the last call to wrefresh, wrefresh will be
called before another character is read.
- If keypad is TRUE, and a function key is pressed, the
- token for that function key is returned instead of the raw
- characters. Possible function keys are defined in
- <curses.h> as macros with values outside the range of
- 8-bit characters whose names begin with KEY_. Thus, a
- variable intended to hold the return value of a function
- key must be of short size or larger.
+ If keypad is TRUE, and a function key is pressed, the to-
+ ken for that function key is returned instead of the raw
+ characters. Possible function keys are defined in <curs-
+ es.h> as macros with values outside the range of 8-bit
+ characters whose names begin with KEY_. Thus, a variable
+ intended to hold the return value of a function key must
+ be of short size or larger.
When a character that could be the beginning of a function
- key is received (which, on modern terminals, means an
- escape character), curses sets a timer. If the remainder
- of the sequence does not come in within the designated
- time, the character is passed through; otherwise, the
- function key value is returned. For this reason, many
- terminals experience a delay between the time a user
- presses the escape key and the escape is returned to the
- program.
+ key is received (which, on modern terminals, means an es-
+ cape character), curses sets a timer. If the remainder of
+ the sequence does not come in within the designated time,
+ the character is passed through; otherwise, the function
+ key value is returned. For this reason, many terminals
+ experience a delay between the time a user presses the es-
+ cape key and the escape is returned to the program.
The ungetch routine places ch back onto the input queue to
be returned by the next call to wgetch. There is just one
input queue for all windows.
-
Function Keys
- The following function keys, defined in <curses.h>, might
- be returned by getch if keypad has been enabled. Note
- that not all of these are necessarily supported on any
+ The following function keys, defined in <curses.h>, might
+ be returned by getch if keypad has been enabled. Note
+ that not all of these are necessarily supported on any
particular terminal.
- Name Key name
-
- KEY_BREAK Break key
- KEY_DOWN The four arrow keys ...
- KEY_UP
- KEY_LEFT
- KEY_RIGHT
- KEY_HOME Home key (upward+left arrow)
- KEY_BACKSPACE Backspace
- KEY_F0 Function keys; space for 64 keys
- is reserved.
- KEY_F(n) For 0 <= n <= 63
- KEY_DL Delete line
- KEY_IL Insert line
- KEY_DC Delete character
- KEY_IC Insert char or enter insert mode
- KEY_EIC Exit insert char mode
- KEY_CLEAR Clear screen
- KEY_EOS Clear to end of screen
- KEY_EOL Clear to end of line
- KEY_SF Scroll 1 line forward
- KEY_SR Scroll 1 line backward (reverse)
- KEY_NPAGE Next page
- KEY_PPAGE Previous page
- KEY_STAB Set tab
- KEY_CTAB Clear tab
- KEY_CATAB Clear all tabs
- KEY_ENTER Enter or send
- KEY_SRESET Soft (partial) reset
- KEY_RESET Reset or hard reset
- KEY_PRINT Print or copy
- KEY_LL Home down or bottom (lower left).
- KEY_A1 Upper left of keypad
- KEY_A3 Upper right of keypad
- KEY_B2 Center of keypad
- KEY_C1 Lower left of keypad
- KEY_C3 Lower right of keypad
- KEY_BTAB Back tab key
- KEY_BEG Beg(inning) key
- KEY_CANCEL Cancel key
-
- KEY_CLOSE Close key
- KEY_COMMAND Cmd (command) key
- KEY_COPY Copy key
- KEY_CREATE Create key
- KEY_END End key
- KEY_EXIT Exit key
- KEY_FIND Find key
- KEY_HELP Help key
- KEY_MARK Mark key
- KEY_MESSAGE Message key
- KEY_MOUSE Mouse event read
- KEY_MOVE Move key
- KEY_NEXT Next object key
- KEY_OPEN Open key
- KEY_OPTIONS Options key
- KEY_PREVIOUS Previous object key
- KEY_REDO Redo key
- KEY_REFERENCE Ref(erence) key
- KEY_REFRESH Refresh key
- KEY_REPLACE Replace key
- KEY_RESIZE Screen resized
- KEY_RESTART Restart key
- KEY_RESUME Resume key
- KEY_SAVE Save key
- KEY_SBEG Shifted beginning key
- KEY_SCANCEL Shifted cancel key
- KEY_SCOMMAND Shifted command key
- KEY_SCOPY Shifted copy key
- KEY_SCREATE Shifted create key
- KEY_SDC Shifted delete char key
- KEY_SDL Shifted delete line key
- KEY_SELECT Select key
- KEY_SEND Shifted end key
- KEY_SEOL Shifted clear line key
- KEY_SEXIT Shifted exit key
- KEY_SFIND Shifted find key
- KEY_SHELP Shifted help key
- KEY_SHOME Shifted home key
- KEY_SIC Shifted input key
- KEY_SLEFT Shifted left arrow key
- KEY_SMESSAGE Shifted message key
- KEY_SMOVE Shifted move key
- KEY_SNEXT Shifted next key
- KEY_SOPTIONS Shifted options key
- KEY_SPREVIOUS Shifted prev key
- KEY_SPRINT Shifted print key
- KEY_SREDO Shifted redo key
- KEY_SREPLACE Shifted replace key
- KEY_SRIGHT Shifted right arrow
- KEY_SRSUME Shifted resume key
- KEY_SSAVE Shifted save key
- KEY_SSUSPEND Shifted suspend key
- KEY_SUNDO Shifted undo key
-
- KEY_SUSPEND Suspend key
- KEY_UNDO Undo key
+
+ Name Key name
+ KEY_BREAK Break key
+ KEY_DOWN The four arrow keys ...
+ KEY_UP
+ KEY_LEFT
+ KEY_RIGHT
+ KEY_HOME Home key (upward+left arrow)
+ KEY_BACKSPACE Backspace
+ KEY_F0 Function keys; space for 64 keys
+ is reserved.
+ KEY_F(n) For 0 <= n <= 63
+ KEY_DL Delete line
+ KEY_IL Insert line
+ KEY_DC Delete character
+ KEY_IC Insert char or enter insert mode
+ KEY_EIC Exit insert char mode
+ KEY_CLEAR Clear screen
+ KEY_EOS Clear to end of screen
+ KEY_EOL Clear to end of line
+ KEY_SF Scroll 1 line forward
+ KEY_SR Scroll 1 line backward (reverse)
+ KEY_NPAGE Next page
+ KEY_PPAGE Previous page
+ KEY_STAB Set tab
+ KEY_CTAB Clear tab
+ KEY_CATAB Clear all tabs
+ KEY_ENTER Enter or send
+ KEY_SRESET Soft (partial) reset
+ KEY_RESET Reset or hard reset
+ KEY_PRINT Print or copy
+ KEY_LL Home down or bottom (lower left)
+ KEY_A1 Upper left of keypad
+ KEY_A3 Upper right of keypad
+ KEY_B2 Center of keypad
+ KEY_C1 Lower left of keypad
+ KEY_C3 Lower right of keypad
+ KEY_BTAB Back tab key
+ KEY_BEG Beg(inning) key
+ KEY_CANCEL Cancel key
+ KEY_CLOSE Close key
+ KEY_COMMAND Cmd (command) key
+ KEY_COPY Copy key
+ KEY_CREATE Create key
+ KEY_END End key
+ KEY_EXIT Exit key
+ KEY_FIND Find key
+ KEY_HELP Help key
+ KEY_MARK Mark key
+ KEY_MESSAGE Message key
+ KEY_MOUSE Mouse event read
+ KEY_MOVE Move key
+ KEY_NEXT Next object key
+ KEY_OPEN Open key
+ KEY_OPTIONS Options key
+ KEY_PREVIOUS Previous object key
+ KEY_REDO Redo key
+ KEY_REFERENCE Ref(erence) key
+ KEY_REFRESH Refresh key
+ KEY_REPLACE Replace key
+ KEY_RESIZE Screen resized
+ KEY_RESTART Restart key
+
+ KEY_RESUME Resume key
+ KEY_SAVE Save key
+ KEY_SBEG Shifted beginning key
+ KEY_SCANCEL Shifted cancel key
+ KEY_SCOMMAND Shifted command key
+ KEY_SCOPY Shifted copy key
+ KEY_SCREATE Shifted create key
+ KEY_SDC Shifted delete char key
+ KEY_SDL Shifted delete line key
+ KEY_SELECT Select key
+ KEY_SEND Shifted end key
+ KEY_SEOL Shifted clear line key
+ KEY_SEXIT Shifted exit key
+ KEY_SFIND Shifted find key
+ KEY_SHELP Shifted help key
+ KEY_SHOME Shifted home key
+ KEY_SIC Shifted input key
+ KEY_SLEFT Shifted left arrow key
+ KEY_SMESSAGE Shifted message key
+ KEY_SMOVE Shifted move key
+ KEY_SNEXT Shifted next key
+ KEY_SOPTIONS Shifted options key
+ KEY_SPREVIOUS Shifted prev key
+ KEY_SPRINT Shifted print key
+ KEY_SREDO Shifted redo key
+ KEY_SREPLACE Shifted replace key
+ KEY_SRIGHT Shifted right arrow
+ KEY_SRSUME Shifted resume key
+ KEY_SSAVE Shifted save key
+ KEY_SSUSPEND Shifted suspend key
+ KEY_SUNDO Shifted undo key
+ KEY_SUSPEND Suspend key
+ KEY_UNDO Undo key
Keypad is arranged like this:
+
+-----+------+-------+
| A1 | up | A3 |
+-----+------+-------+
@@ -223,16 +225,30 @@
+-----+------+-------+
The has_key routine takes a key value from the above list,
and returns TRUE or FALSE according to whether the current
- terminal type recognizes a key with that value.
-
+ terminal type recognizes a key with that value. Note that
+ a few values do not correspond to a real key, e.g.,
+ KEY_RESIZE and KEY_MOUSE. See resizeterm(3x) for more de-
+ tails about KEY_RESIZE, and curs_mouse(3x) for a discus-
+ sion of KEY_MOUSE.
RETURN VALUE
- All routines return the integer ERR upon failure and an
+ All routines return the integer ERR upon failure and an
integer value other than ERR (OK in the case of ungetch())
upon successful completion.
+ ungetch
+ returns ERR if there is no more room in the FIFO.
+
+ wgetch
+ returns ERR if the window pointer is null, or if
+ its timeout expires without having any data.
+
+ Functions with a "mv" prefix first perform a cursor move-
+ ment using wmove, and return an error if the position is
+ outside the window, or if the window pointer is null.
+
NOTES
@@ -242,19 +258,35 @@
ing function-key sequence.
Note that some keys may be the same as commonly used con-
- trol keys, e.g., KEY_ENTER versus control/M, KEY_BACKSPACE
+ trol keys, e.g., KEY_ENTER versus control/M, KEY_BACKSPACE
versus control/H. Some curses implementations may differ
according to whether they treat these control keys spe-
cially (and ignore the terminfo), or use the terminfo def-
initions. Ncurses uses the terminfo definition. If it
- says that KEY_ENTER is control/M, getch, will return
- KEY_ENTER when you press control/M.
+ says that KEY_ENTER is control/M, getch will return
+ KEY_ENTER when you press control/M.
+
+ Generally, KEY_ENTER denotes the character(s) sent by the
+ Enter key on the numeric keypad:
+
+ o the terminal description lists the most useful keys,
+
+ o the Enter key on the regular keyboard is already han-
+ dled by the standard ASCII characters for carriage-re-
+ turn and line-feed,
+
+ o depending on whether nl or nonl was called, pressing
+ "Enter" on the regular keyboard may return either a
+ carriage-return or line-feed, and finally
+
+ o "Enter or send" is the standard description for this
+ key.
When using getch, wgetch, mvgetch, or mvwgetch, nocbreak
mode (nocbreak) and echo mode (echo) should not be used at
the same time. Depending on the state of the tty driver
- when each character is typed, the program may produce
- undesirable results.
+ when each character is typed, the program may produce un-
+ desirable results.
Note that getch, mvgetch, and mvwgetch may be macros.
@@ -277,54 +309,42 @@
The echo behavior of these functions on input of KEY_ or
backspace characters was not specified in the SVr4 docu-
- mentation. This description is adopted from the XSI
- Curses standard.
+ mentation. This description is adopted from the XSI Curs-
+ es standard.
The behavior of getch and friends in the presence of han-
dled signals is unspecified in the SVr4 and XSI Curses
documentation. Under historical curses implementations,
- it varied depending on whether the operating system's
- implementation of handled signal receipt interrupts a
+ it varied depending on whether the operating system's im-
+ plementation of handled signal receipt interrupts a
read(2) call in progress or not, and also (in some imple-
mentations) depending on whether an input timeout or non-
- blocking mode hsd been set.
+ blocking mode has been set.
Programmers concerned about portability should be prepared
- for either of two cases: (a) signal receipt does not
- interrupt getch; (b) signal receipt interrupts getch and
+ for either of two cases: (a) signal receipt does not in-
+ terrupt getch; (b) signal receipt interrupts getch and
causes it to return ERR with errno set to EINTR. Under
the ncurses implementation, handled signals never inter-
rupt getch.
The has_key function is unique to ncurses. We recommend
- that any code using it be conditionalized on the
- NCURSES_VERSION feature macro.
+ that any code using it be conditionalized on the NCURS-
+ ES_VERSION feature macro.
SEE ALSO
- curses(3x), curs_inopts(3x), curs_mouse(3x),
- curs_move(3x), curs_refresh(3x). resizeterm(3x).
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+ curses(3x), curs_inopts(3x), curs_outopts(3x),
+ curs_mouse(3x), curs_move(3x), curs_refresh(3x), re-
+ sizeterm(3x).
+ Comparable functions in the wide-character (ncursesw) li-
+ brary are described in curs_get_wch(3x).
+ curs_getch(3x)