X-Git-Url: http://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=man%2Fcurs_window.3x;h=ec811d367ec2cbbb54a73a9392b66eee6bd5cf03;hp=8c572995e9e439627e815b73e8347d60cb90c12a;hb=5ad1bd48d7931f7daf76a0cd9b3382fdb5eb5c27;hpb=55ccd2b959766810cf7db8d1c4462f338ce0afc8 diff --git a/man/curs_window.3x b/man/curs_window.3x index 8c572995..ec811d36 100644 --- a/man/curs_window.3x +++ b/man/curs_window.3x @@ -1,5 +1,5 @@ .\"*************************************************************************** -.\" Copyright (c) 1998-2003,2005 Free Software Foundation, Inc. * +.\" Copyright (c) 1998-2010,2014 Free Software Foundation, Inc. * .\" * .\" Permission is hereby granted, free of charge, to any person obtaining a * .\" copy of this software and associated documentation files (the * @@ -26,7 +26,7 @@ .\" authorization. * .\"*************************************************************************** .\" -.\" $Id: curs_window.3x,v 1.13 2005/05/15 16:32:02 tom Exp $ +.\" $Id: curs_window.3x,v 1.18 2014/03/01 23:36:38 tom Exp $ .TH curs_window 3X "" .na .hy 0 @@ -41,23 +41,26 @@ \fBwsyncup\fR, \fBsyncok\fR, \fBwcursyncup\fR, -\fBwsyncdown\fR - create \fBcurses\fR windows +\fBwsyncdown\fR \- create \fBcurses\fR windows .ad .hy .SH SYNOPSIS \fB#include \fR - -\fBWINDOW *newwin(int nlines, int ncols, int begin_y,\fR - \fBint begin_x);\fR +.sp +\fBWINDOW *newwin(\fR + \fBint nlines, int ncols,\fR + \fBint begin_y, int begin_x);\fR .br \fBint delwin(WINDOW *win);\fR .br \fBint mvwin(WINDOW *win, int y, int x);\fR .br -\fBWINDOW *subwin(WINDOW *orig, int nlines, int ncols,\fR +\fBWINDOW *subwin(WINDOW *orig,\fR + \fBint nlines, int ncols,\fR \fBint begin_y, int begin_x);\fR .br -\fBWINDOW *derwin(WINDOW *orig, int nlines, int ncols,\fR +\fBWINDOW *derwin(WINDOW *orig,\fR + \fBint nlines, int ncols,\fR \fBint begin_y, int begin_x);\fR .br \fBint mvderwin(WINDOW *win, int par_y, int par_x);\fR @@ -74,55 +77,72 @@ .br .SH DESCRIPTION Calling \fBnewwin\fR creates and returns a pointer to a new window with the -given number of lines and columns. The upper left-hand corner of the window is -at line \fIbegin\fR_\fIy\fR, column \fIbegin\fR_\fIx\fR. If either -\fInlines\fR or \fIncols\fR is zero, they default to \fBLINES -\fR -\fIbegin\fR_\fIy\fR and \fBCOLS -\fR \fIbegin\fR_\fIx\fR. A new full-screen -window is created by calling \fBnewwin(0,0,0,0)\fR. - +given number of lines and columns. +The upper left-hand corner of the window is +at +.RS +line \fIbegin\fR_\fIy\fR, +.br +column \fIbegin\fR_\fIx\fR +.RE +.PP +If either +\fInlines\fR or \fIncols\fR is zero, they default to +.RS +\fBLINES \-\fR \fIbegin\fR_\fIy\fR and +.br +\fBCOLS \-\fR \fIbegin\fR_\fIx\fR. +.RE +.PP +A new full-screen window is created by calling \fBnewwin(0,0,0,0)\fR. +.PP Calling \fBdelwin\fR deletes the named window, freeing all memory associated with it (it does not actually erase the window's screen -image). Subwindows must be deleted before the main window can be -deleted. - +image). +Subwindows must be deleted before the main window can be deleted. +.PP Calling \fBmvwin\fR moves the window so that the upper left-hand -corner is at position (\fIx\fR, \fIy\fR). 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. - +corner is at position (\fIx\fR, \fIy\fR). +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. +.PP Calling \fBsubwin\fR creates and returns a pointer to a new window -with the given number of lines, \fInlines\fR, and columns, -\fIncols\fR. The window is at position (\fIbegin\fR_\fIy\fR, -\fIbegin\fR_\fIx\fR) on the screen. (This position is relative to the -screen, and not to the window \fIorig\fR.) The window is made in the -middle of the window \fIorig\fR, so that changes made to one window -will affect both windows. The subwindow shares memory with the window -\fIorig\fR. When using this routine, it is necessary to call +with the given number of lines, \fInlines\fR, and columns, \fIncols\fR. +The window is at position (\fIbegin\fR_\fIy\fR, +\fIbegin\fR_\fIx\fR) on the screen. +The subwindow shares memory with the window \fIorig\fR, +so that changes made to one window +will affect both windows. +When using this routine, it is necessary to call \fBtouchwin\fR or \fBtouchline\fR on \fIorig\fR before calling \fBwrefresh\fR on the subwindow. - +.PP Calling \fBderwin\fR is the same as calling \fBsubwin,\fR except that \fIbegin\fR_\fIy\fR and \fIbegin\fR_\fIx\fR are relative to the origin -of the window \fIorig\fR rather than the screen. There is no -difference between the subwindows and the derived windows. - +of the window \fIorig\fR rather than the screen. +There is no difference between the subwindows and the derived windows. +.PP Calling \fBmvderwin\fR moves a derived window (or subwindow) -inside its parent window. The screen-relative parameters of the -window are not changed. This routine is used to display different +inside its parent window. +The screen-relative parameters of the window are not changed. +This routine is used to display different parts of the parent window at the same physical position on the screen. - +.PP Calling \fBdupwin\fR creates an exact duplicate of the window \fIwin\fR. - +.PP Calling \fBwsyncup\fR touches all locations in ancestors of \fIwin\fR that are -changed in \fIwin\fR. If \fBsyncok\fR is called with second argument +changed in \fIwin\fR. +If \fBsyncok\fR is called with second argument \fBTRUE\fR then \fBwsyncup\fR is called automatically whenever there is a change in the window. - +.PP The \fBwsyncdown\fR routine touches each location in \fIwin\fR that has been -touched in any of its ancestor windows. This routine is called by +touched in any of its ancestor windows. +This routine is called by \fBwrefresh\fR, so it should almost never be necessary to call it manually. - +.PP The routine \fBwcursyncup\fR updates the current cursor position of all the ancestors of the window to reflect the current cursor position of the window. @@ -135,11 +155,18 @@ Routines that return pointers return \fBNULL\fR on error. .PP X/Open defines no error conditions. In this implementation -.RS .TP 5 \fBdelwin\fR returns an error if the window pointer is null, or if the window is the parent of another window. +.TP 5 +\fBderwin\fP +returns an error if the parent window pointer is null, or +if any of its ordinates or dimensions is negative, or +if the resulting window does not fit inside the parent window. +.TP 5 +\fBdupwin\fP +returns an error if the window pointer is null. .IP This implementation also maintains a list of windows, and checks that the pointer passed to \fBdelwin\fP is one that @@ -156,33 +183,44 @@ 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. .TP 5 +\fBnewwin\fP +will fail if either of its beginning ordinates is negative, or +if either the number of lines or columns is negative. +.TP 5 \fBsyncok\fP returns an error if the window pointer is null. -.RE +.TP 5 +\fBsubwin\fP +returns an error if the parent window pointer is null, or +if any of its ordinates or dimensions is negative, or +if the resulting window does not fit inside the parent window. +.PP +The functions which return a window pointer +may also fail if there is insufficient memory for its data structures. +Any of these functions will fail if the screen has not been initialized, +i.e., with \fBinitscr\fP or \fBnewterm\fP. .SH NOTES If many small changes are made to the window, the \fBwsyncup\fR option could degrade performance. - +.PP Note that \fBsyncok\fR may be a macro. .SH BUGS The subwindow functions (\fIsubwin\fR, \fIderwin\fR, \fImvderwin\fR, \fBwsyncup\fR, \fBwsyncdown\fR, \fBwcursyncup\fR, \fBsyncok\fR) are flaky, incompletely implemented, and not well tested. - +.PP The System V curses documentation is very unclear about what \fBwsyncup\fR -and \fBwsyncdown\fR actually do. It seems to imply that they are only +and \fBwsyncdown\fR 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 \fBcurses\fR implementation, -is patterned on the XPG4 curses standard. The weaker XPG4 spec may result -in slower updates. +is patterned on the XPG4 curses standard. +The weaker XPG4 spec may result in slower updates. .SH PORTABILITY The XSI Curses standard, Issue 4 describes these functions. .SH SEE ALSO -\fBcurses\fR(3X), \fBcurs_refresh\fR(3X), \fBcurs_touch\fR(3X) -.\"# -.\"# The following sets edit modes for GNU EMACS -.\"# Local Variables: -.\"# mode:nroff -.\"# fill-column:79 -.\"# End: +\fBcurses\fR(3X), +\fBcurs_refresh\fR(3X), +\fBcurs_touch\fR(3X), +\fBcurs_variables\fR(3X)