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| * @Id: curs_touch.3x,v 1.11 2006/02/25 21:49:19 tom Exp @ |
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| <TITLE>curs_touch 3x</TITLE> |
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| <H1>curs_touch 3x</H1> |
| <HR> |
| <PRE> |
| <!-- Manpage converted by man2html 3.0.1 --> |
| <STRONG><A HREF="curs_touch.3x.html">curs_touch(3x)</A></STRONG> <STRONG><A HREF="curs_touch.3x.html">curs_touch(3x)</A></STRONG> |
| |
| |
| |
| |
| </PRE> |
| <H2>NAME</H2><PRE> |
| <STRONG>touchwin</STRONG>, <STRONG>touchline</STRONG>, <STRONG>untouchwin</STRONG>, <STRONG>wtouchln</STRONG>, <STRONG>is_linetouched</STRONG>, |
| <STRONG>is_wintouched</STRONG> - <STRONG>curses</STRONG> refresh control routines |
| |
| |
| </PRE> |
| <H2>SYNOPSIS</H2><PRE> |
| <STRONG>#include</STRONG> <STRONG><curses.h></STRONG> |
| <STRONG>int</STRONG> <STRONG>touchwin(WINDOW</STRONG> <STRONG>*win);</STRONG> |
| <STRONG>int</STRONG> <STRONG>touchline(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>start,</STRONG> <STRONG>int</STRONG> <STRONG>count);</STRONG> |
| <STRONG>int</STRONG> <STRONG>untouchwin(WINDOW</STRONG> <STRONG>*win);</STRONG> |
| <STRONG>int</STRONG> <STRONG>wtouchln(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>n,</STRONG> <STRONG>int</STRONG> <STRONG>changed);</STRONG> |
| <STRONG>bool</STRONG> <STRONG>is_linetouched(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>line);</STRONG> |
| <STRONG>bool</STRONG> <STRONG>is_wintouched(WINDOW</STRONG> <STRONG>*win);</STRONG> |
| |
| |
| </PRE> |
| <H2>DESCRIPTION</H2><PRE> |
| The <STRONG>touchwin</STRONG> and <STRONG>touchline</STRONG> routines throw away all opti- |
| mization information about which parts of the window have |
| been touched, by pretending that the entire window has |
| been drawn on. This is sometimes necessary when using |
| overlapping windows, since a change to one window affects |
| the other window, but the records of which lines have been |
| changed in the other window do not reflect the change. |
| The routine <STRONG>touchline</STRONG> only pretends that <EM>count</EM> lines have |
| been changed, beginning with line <EM>start</EM>. |
| |
| The <STRONG>untouchwin</STRONG> routine marks all lines in the window as |
| unchanged since the last call to <STRONG>wrefresh</STRONG>. |
| |
| The <STRONG>wtouchln</STRONG> routine makes <EM>n</EM> lines in the window, starting |
| at line <EM>y</EM>, look as if they have (<EM>changed</EM><STRONG>=1</STRONG>) or have not |
| (<EM>changed</EM><STRONG>=0</STRONG>) been changed since the last call to <STRONG>wrefresh</STRONG>. |
| |
| The <STRONG>is_linetouched</STRONG> and <STRONG>is_wintouched</STRONG> routines return <STRONG>TRUE</STRONG> |
| if the specified line/window was modified since the last |
| call to <STRONG>wrefresh</STRONG>; otherwise they return <STRONG>FALSE</STRONG>. In addi- |
| tion, <STRONG>is_linetouched</STRONG> returns <STRONG>ERR</STRONG> if <EM>line</EM> is not valid for |
| the given window. |
| |
| |
| </PRE> |
| <H2>RETURN VALUE</H2><PRE> |
| All routines return the integer <STRONG>ERR</STRONG> upon failure and an |
| integer value other than <STRONG>ERR</STRONG> upon successful completion, |
| unless otherwise noted in the preceding routine descrip- |
| tions. |
| |
| X/Open does not define any error conditions. In this im- |
| plementation |
| |
| <STRONG>is_linetouched</STRONG> |
| returns an error if the window pointer is |
| null, or if the line number is outside the |
| window. Note that ERR is distinct from TRUE |
| and FALSE, which are the normal return values |
| of this function. |
| |
| <STRONG>wtouchln</STRONG> |
| returns an error if the window pointer is |
| null, or if the line number is outside the |
| window. |
| |
| |
| </PRE> |
| <H2>PORTABILITY</H2><PRE> |
| The XSI Curses standard, Issue 4 describes these func- |
| tions. |
| |
| Some historic curses implementations had, as an undocu- |
| mented feature, the ability to do the equivalent of |
| <STRONG>clearok(...,</STRONG> <STRONG>1)</STRONG> by saying <STRONG>touchwin(stdscr)</STRONG> or <STRONG>clear(std-</STRONG> |
| <STRONG>scr)</STRONG>. This will not work under ncurses. |
| |
| |
| </PRE> |
| <H2>NOTES</H2><PRE> |
| Note that all routines except <STRONG>wtouchln</STRONG> may be macros. |
| |
| |
| </PRE> |
| <H2>SEE ALSO</H2><PRE> |
| <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>. |
| |
| |
| |
| <STRONG><A HREF="curs_touch.3x.html">curs_touch(3x)</A></STRONG> |
| </PRE> |
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