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| * @Id: curs_window.3x,v 1.14 2006/02/25 21:49:19 tom Exp @ |
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| <TITLE>curs_window 3x</TITLE> |
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| <H1>curs_window 3x</H1> |
| <HR> |
| <PRE> |
| <!-- Manpage converted by man2html 3.0.1 --> |
| <STRONG><A HREF="curs_window.3x.html">curs_window(3x)</A></STRONG> <STRONG><A HREF="curs_window.3x.html">curs_window(3x)</A></STRONG> |
| |
| |
| |
| |
| </PRE> |
| <H2>NAME</H2><PRE> |
| <STRONG>newwin</STRONG>, <STRONG>delwin</STRONG>, <STRONG>mvwin</STRONG>, <STRONG>subwin</STRONG>, <STRONG>derwin</STRONG>, <STRONG>mvderwin</STRONG>, <STRONG>dupwin</STRONG>, |
| <STRONG>wsyncup</STRONG>, <STRONG>syncok</STRONG>, <STRONG>wcursyncup</STRONG>, <STRONG>wsyncdown</STRONG> - create <STRONG>curses</STRONG> |
| windows |
| |
| |
| </PRE> |
| <H2>SYNOPSIS</H2><PRE> |
| <STRONG>#include</STRONG> <STRONG><curses.h></STRONG> |
| |
| <STRONG>WINDOW</STRONG> <STRONG>*newwin(int</STRONG> <STRONG>nlines,</STRONG> <STRONG>int</STRONG> <STRONG>ncols,</STRONG> <STRONG>int</STRONG> <STRONG>begin_y,</STRONG> |
| <STRONG>int</STRONG> <STRONG>begin_x);</STRONG> |
| <STRONG>int</STRONG> <STRONG>delwin(WINDOW</STRONG> <STRONG>*win);</STRONG> |
| <STRONG>int</STRONG> <STRONG>mvwin(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x);</STRONG> |
| <STRONG>WINDOW</STRONG> <STRONG>*subwin(WINDOW</STRONG> <STRONG>*orig,</STRONG> <STRONG>int</STRONG> <STRONG>nlines,</STRONG> <STRONG>int</STRONG> <STRONG>ncols,</STRONG> |
| <STRONG>int</STRONG> <STRONG>begin_y,</STRONG> <STRONG>int</STRONG> <STRONG>begin_x);</STRONG> |
| <STRONG>WINDOW</STRONG> <STRONG>*derwin(WINDOW</STRONG> <STRONG>*orig,</STRONG> <STRONG>int</STRONG> <STRONG>nlines,</STRONG> <STRONG>int</STRONG> <STRONG>ncols,</STRONG> |
| <STRONG>int</STRONG> <STRONG>begin_y,</STRONG> <STRONG>int</STRONG> <STRONG>begin_x);</STRONG> |
| <STRONG>int</STRONG> <STRONG>mvderwin(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>par_y,</STRONG> <STRONG>int</STRONG> <STRONG>par_x);</STRONG> |
| <STRONG>WINDOW</STRONG> <STRONG>*dupwin(WINDOW</STRONG> <STRONG>*win);</STRONG> |
| <STRONG>void</STRONG> <STRONG>wsyncup(WINDOW</STRONG> <STRONG>*win);</STRONG> |
| <STRONG>int</STRONG> <STRONG>syncok(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>bool</STRONG> <STRONG>bf);</STRONG> |
| <STRONG>void</STRONG> <STRONG>wcursyncup(WINDOW</STRONG> <STRONG>*win);</STRONG> |
| <STRONG>void</STRONG> <STRONG>wsyncdown(WINDOW</STRONG> <STRONG>*win);</STRONG> |
| |
| |
| </PRE> |
| <H2>DESCRIPTION</H2><PRE> |
| Calling <STRONG>newwin</STRONG> creates and returns a pointer to a new win- |
| dow with the given number of lines and columns. The upper |
| left-hand corner of the window is at line <EM>begin</EM>_<EM>y</EM>, column |
| <EM>begin</EM>_<EM>x</EM>. If either <EM>nlines</EM> or <EM>ncols</EM> is zero, they default |
| to <STRONG>LINES</STRONG> <STRONG>-</STRONG> <EM>begin</EM>_<EM>y</EM> and <STRONG>COLS</STRONG> <STRONG>-</STRONG> <EM>begin</EM>_<EM>x</EM>. A new full-screen |
| window is created by calling <STRONG>newwin(0,0,0,0)</STRONG>. |
| |
| Calling <STRONG>delwin</STRONG> deletes the named window, freeing all memo- |
| ry associated with it (it does not actually erase the win- |
| dow's screen image). Subwindows must be deleted before |
| the main window can be deleted. |
| |
| Calling <STRONG>mvwin</STRONG> moves the window so that the upper left-hand |
| corner is at position (<EM>x</EM>, <EM>y</EM>). If the move would cause the |
| window to be off the screen, it is an error and the window |
| is not moved. Moving subwindows is allowed, but should be |
| avoided. |
| |
| Calling <STRONG>subwin</STRONG> creates and returns a pointer to a new win- |
| dow with the given number of lines, <EM>nlines</EM>, and columns, |
| <EM>ncols</EM>. The window is at position (<EM>begin</EM>_<EM>y</EM>, <EM>begin</EM>_<EM>x</EM>) on |
| the screen. (This position is relative to the screen, and |
| not to the window <EM>orig</EM>.) The window is made in the middle |
| of the window <EM>orig</EM>, so that changes made to one window |
| will affect both windows. The subwindow shares memory |
| with the window <EM>orig</EM>. When using this routine, it is nec- |
| essary to call <STRONG>touchwin</STRONG> or <STRONG>touchline</STRONG> on <EM>orig</EM> before call- |
| ing <STRONG>wrefresh</STRONG> on the subwindow. |
| |
| Calling <STRONG>derwin</STRONG> is the same as calling <STRONG>subwin,</STRONG> except that |
| <EM>begin</EM>_<EM>y</EM> and <EM>begin</EM>_<EM>x</EM> are relative to the origin of the win- |
| dow <EM>orig</EM> rather than the screen. There is no difference |
| between the subwindows and the derived windows. |
| |
| Calling <STRONG>mvderwin</STRONG> moves a derived window (or subwindow) in- |
| side its parent window. The screen-relative parameters of |
| the window are not changed. This routine is used to dis- |
| play different parts of the parent window at the same |
| physical position on the screen. |
| |
| Calling <STRONG>dupwin</STRONG> creates an exact duplicate of the window |
| <EM>win</EM>. |
| |
| Calling <STRONG>wsyncup</STRONG> touches all locations in ancestors of <EM>win</EM> |
| that are changed in <EM>win</EM>. If <STRONG>syncok</STRONG> is called with second |
| argument <STRONG>TRUE</STRONG> then <STRONG>wsyncup</STRONG> is called automatically whenev- |
| er there is a change in the window. |
| |
| The <STRONG>wsyncdown</STRONG> routine touches each location in <EM>win</EM> that |
| has been touched in any of its ancestor windows. This |
| routine is called by <STRONG>wrefresh</STRONG>, so it should almost never |
| be necessary to call it manually. |
| |
| The routine <STRONG>wcursyncup</STRONG> updates the current cursor position |
| of all the ancestors of the window to reflect the current |
| cursor position of the window. |
| |
| |
| </PRE> |
| <H2>RETURN VALUE</H2><PRE> |
| Routines that return an integer return the integer <STRONG>ERR</STRONG> up- |
| on failure and <STRONG>OK</STRONG> (SVr4 only specifies "an integer value |
| other than <STRONG>ERR</STRONG>") upon successful completion. |
| |
| Routines that return pointers return <STRONG>NULL</STRONG> on error. |
| |
| X/Open defines no error conditions. In this implementa- |
| tion |
| |
| <STRONG>delwin</STRONG> |
| returns an error if the window pointer is |
| null, or if the window is the parent of anoth- |
| er window. |
| |
| This implementation also maintains a list of |
| windows, and checks that the pointer passed to |
| <STRONG>delwin</STRONG> is one that it created, returning an |
| error if it was not.. |
| |
| <STRONG>mvderwin</STRONG> |
| returns an error if the window pointer is |
| null, or if some part of the window would be |
| placed off-screen. |
| |
| <STRONG>mvwin</STRONG> |
| returns an error if the window pointer is |
| null, or if the window is really a pad, or if |
| some part of the window would be placed off- |
| screen. |
| |
| <STRONG>syncok</STRONG> |
| returns an error if the window pointer is |
| null. |
| |
| |
| </PRE> |
| <H2>NOTES</H2><PRE> |
| If many small changes are made to the window, the <STRONG>wsyncup</STRONG> |
| option could degrade performance. |
| |
| Note that <STRONG>syncok</STRONG> may be a macro. |
| |
| |
| </PRE> |
| <H2>BUGS</H2><PRE> |
| The subwindow functions (<EM>subwin</EM>, <EM>derwin</EM>, <EM>mvderwin</EM>, <STRONG>wsyn-</STRONG> |
| <STRONG>cup</STRONG>, <STRONG>wsyncdown</STRONG>, <STRONG>wcursyncup</STRONG>, <STRONG>syncok</STRONG>) are flaky, incomplete- |
| ly implemented, and not well tested. |
| |
| The System V curses documentation is very unclear about |
| what <STRONG>wsyncup</STRONG> and <STRONG>wsyncdown</STRONG> actually do. It seems to imply |
| that they are only supposed to touch exactly those lines |
| that are affected by ancestor changes. The language here, |
| and the behavior of the <STRONG>curses</STRONG> implementation, is pat- |
| terned on the XPG4 curses standard. The weaker XPG4 spec |
| may result in slower updates. |
| |
| |
| </PRE> |
| <H2>PORTABILITY</H2><PRE> |
| The XSI Curses standard, Issue 4 describes these func- |
| tions. |
| |
| |
| </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> |
| |
| |
| |
| <STRONG><A HREF="curs_window.3x.html">curs_window(3x)</A></STRONG> |
| </PRE> |
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