X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=doc%2Fhtml%2Fman%2Fcurs_getch.3x.html;h=9b7b9d9cc2a64c51ac020951357858066683a324;hp=833b88e6ba33edb39e18269b9bdce5cc33365aaf;hb=a8987e73ec254703634802b4f7ee30d3a485524d;hpb=b1f61d9f3aa244512045a6b02e759825d7049d34 diff --git a/doc/html/man/curs_getch.3x.html b/doc/html/man/curs_getch.3x.html index 833b88e6..9b7b9d9c 100644 --- a/doc/html/man/curs_getch.3x.html +++ b/doc/html/man/curs_getch.3x.html @@ -1,62 +1,105 @@ + + +
++curs_getch(3x) curs_getch(3x) + + +
- getch, wgetch, mvgetch, mvwgetch, ungetch, has_key - get - (or push back) characters from curses terminal keyboard + getch, wgetch, mvgetch, mvwgetch, ungetch, has_key - get + (or push back) characters from curses terminal keyboard
- #include <curses.h> + #include <curses.h> - int getch(void); - int wgetch(WINDOW *win); - int mvgetch(int y, int x); - int mvwgetch(WINDOW *win, int y, int x); - int ungetch(int ch); - int has_key(int ch); + int getch(void); + int wgetch(WINDOW *win); + int mvgetch(int y, int x); + int mvwgetch(WINDOW *win, int y, int x); + int ungetch(int ch); + int has_key(int ch);
- The getch, wgetch, mvgetch and mvwgetch, routines read a + The getch, wgetch, mvgetch and mvwgetch, routines read a character from the window. In no-delay mode, if no input - is waiting, the value ERR is returned. In delay mode, the + 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 + program. Depending on the setting of cbreak, this is after 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 + 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- 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 + other 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 + 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 + 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 + <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. 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 + 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 @@ -64,134 +107,135 @@ presses the escape 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. Note that there - is, in effect, just one input queue for all windows. + 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 + 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 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 | + | A1 | up | A3 | +-----+------+-------+ - |left | B2 | right | + |left | B2 | right | +-----+------+-------+ - | C1 | down | C3 | + | C1 | down | C3 | +-----+------+-------+ - The has_key routine takes a key value from the above list, - and returns TRUE or FALSE according as the current termi- - nal type recognizes a key with that value. + 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. Note that + a few values do not correspond to a real key, e.g., + KEY_RESIZE and KEY_MOUSE.
- All routines return the integer ERR upon failure and an - integer value other than ERR (OK in the case of ungetch()) + All routines return the integer ERR upon failure and an + integer value other than ERR (OK in the case of ungetch()) upon successful completion. @@ -202,90 +246,74 @@ up to one second while the keypad code looks for a follow- ing function-key sequence. - 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 + Note that some keys may be the same as commonly used con- + 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. + + 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. - Note that getch, mvgetch, and mvwgetch may be macros. + Note that getch, mvgetch, and mvwgetch may be macros. Historically, the set of keypad macros was largely defined - by the extremely function-key-rich keyboard of the AT&T - 7300, aka 3B1, aka Safari 4. Modern personal computers - usually have only a small subset of these. IBM PC-style - consoles typically support little more than KEY_UP, - KEY_DOWN, KEY_LEFT, KEY_RIGHT, KEY_HOME, KEY_END, - KEY_NPAGE, KEY_PPAGE, and function keys 1 through 12. The - Ins key is usually mapped to KEY_IC. + by the extremely function-key-rich keyboard of the AT&T + 7300, aka 3B1, aka Safari 4. Modern personal computers + usually have only a small subset of these. IBM PC-style + consoles typically support little more than KEY_UP, + KEY_DOWN, KEY_LEFT, KEY_RIGHT, KEY_HOME, KEY_END, + KEY_NPAGE, KEY_PPAGE, and function keys 1 through 12. The + Ins key is usually mapped to KEY_IC.
- The *get* functions are described in the XSI Curses stan- - dard, Issue 4. They read single-byte characters only. - The standard specifies that they return ERR on failure, + The *get* functions are described in the XSI Curses stan- + dard, Issue 4. They read single-byte characters only. + The standard specifies that they return ERR on failure, but specifies no error conditions. - 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 + 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. - 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 - 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. + 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 + read(2) call in progress or not, and also (in some imple- + mentations) depending on whether an input timeout or non- + 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 - causes it to return ERR with errno set to EINTR. Under - the ncurses implementation, handled signals never inter- - rupt getch. + for either of two cases: (a) signal receipt does not + interrupt 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. + The has_key function is unique to ncurses. We recommend + that any code using it be conditionalized on the + NCURSES_VERSION feature macro.
- curses(3x), curs_inopts(3x), curs_mouse(3x), - curs_move(3x), curs_refresh(3x). resizeterm(3x). - - - - - - - - - - - - - - - - - - - - - - - - - - + curses(3x), curs_inopts(3x), curs_mouse(3x), + curs_move(3x), curs_refresh(3x). resizeterm(3x). + curs_getch(3x)