124 lines
5.0 KiB
Groff
124 lines
5.0 KiB
Groff
.TH curs_window 3X ""
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.SH NAME
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\fBcurs_window\fR: \fBnewwin\fR, \fBdelwin\fR, \fBmvwin\fR,
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\fBsubwin\fR, \fBderwin\fR, \fBmvderwin\fR, \fBdupwin\fR,
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\fBwsyncup\fR, \fBsyncok\fR, \fBwcursyncup\fR, \fBwsyncdown\fR -
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create \fBncurses\fR windows
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.SH SYNOPSIS
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\fB#include <ncurses.h>\fR
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\fBWINDOW *newwin(int nlines, int ncols, int begin_y,\fR
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\fBintbegin_x);\fR
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\fBint delwin(WINDOW *win);\fR
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.br
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\fBint mvwin(WINDOW *win, int y, int x);\fR
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.br
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\fBWINDOW *subwin(WINDOW *orig, int nlines, int ncols,
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int begin_y, int begin_x);\fR
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\fBWINDOW *derwin(WINDOW *orig, int nlines, int ncols,
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int begin_y, int begin_x);\fR
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\fBint mvderwin(WINDOW *win, int par_y, int par_x);\fR
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.br
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\fBWINDOW *dupwin(WINDOW *win);\fR
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.br
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\fBvoid wsyncup(WINDOW *win);\fR
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.br
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\fBint syncok(WINDOW *win, bool bf);\fR
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.br
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\fBvoid wcursyncup(WINDOW *win);\fR
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.br
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\fBvoid wsyncdown(WINDOW *win);\fR
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.br
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.SH DESCRIPTION
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The \fBnewwin\fR routine creates and returns a pointer to a new window with the
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given number of lines and columns. The upper left-hand corner of the window is
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at line \fIbegin\fR_\fIy\fR, column \fIbegin\fR_\fIx\fR. If either
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\fInlines\fR or \fIncols\fR is zero, they default to \fBLINES -\fR
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\fIbegin\fR_\fIy\fR and \fBCOLS -\fR \fIbegin\fR_\fIx\fR. A new full-screen
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window is created by calling \fBnewwin(0,0,0,0)\fR.
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The \fBdelwin\fR routine deletes the named window, freeing all memory
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associated with it (it does not actually erase the window's screen
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image). Subwindows must be deleted before the main window can be
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deleted.
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The \fBmvwin\fR routine moves the window so that the upper left-hand
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corner is at position (\fIx\fR, \fIy\fR). If the move would cause the
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window to be off the screen, it is an error and the window is not
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moved. Moving subwindows is allowed, but should be avoided.
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The \fBsubwin\fR routine creates and returns a pointer to a new window
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with the given number of lines, \fInlines\fR, and columns,
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\fIncols\fR. The window is at position (\fIbegin\fR_\fIy\fR,
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\fIbegin\fR_\fIx\fR) on the screen. (This position is relative to the
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screen, and not to the window \fIorig\fR.) The window is made in the
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middle of the window \fIorig\fR, so that changes made to one window
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will affect both windows. The subwindow shares memory with the window
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\fIorig\fR. When using this routine, it is necessary to call
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\fBtouchwin\fR or \fBtouchline\fR on \fIorig\fR before calling
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\fBwrefresh\fR on the subwindow.
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The \fBderwin\fR routine is the same as \fBsubwin,\fR except that
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\fIbegin\fR_\fIy\fR and \fIbegin\fR_\fIx\fR are relative to the origin
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of the window \fIorig\fR rather than the screen. There is no
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difference between the subwindows and the derived windows.
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The \fBmvderwin\fR routine moves a derived window (or subwindow)
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inside its parent window. The screen-relative parameters of the
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window are not changed. This routine is used to display different
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parts of the parent window at the same physical position on the
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screen.
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The \fBdupwin\fR routine creates an exact duplicate of the window \fIwin\fR.
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Each \fBncurses\fR window maintains two data structures: the character
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image structure and the status structure. The character image
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structure is shared among all windows in the window hierarchy
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(\fIi\fR.\fIe\fR., the window with all subwindows). The status
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structure, which contains information about individual line changes in
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the window, is private to each window. The routine \fBwrefresh\fR
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uses the status data structure when performing screen updating. Since
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status structures are not shared, changes made to one window in the
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hierarchy may not be properly reflected on the screen.
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The routine \fBwsyncup\fR causes the changes in the status structure
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of a window to be reflected in the status structures of its ancestors.
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If \fBsyncok\fR is called with second argument \fBTRUE\fR then
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\fBwsyncup\fR is called automatically whenever there is a change in
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the window.
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The routine \fBwcursyncup\fR updates the current cursor position of all the
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ancestors of the window to reflect the current cursor position of the
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window.
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The routine \fBwsyncdown\fR updates the status structure of the window
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to reflect the changes in the status structures of its ancestors.
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Applications seldom call this routine because it is called
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automatically by \fBwrefresh\fR.
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.SH RETURN VALUE
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Routines that return an integer return the integer \fBERR\fR upon failure and
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an integer value other than \fBERR\fR upon successful completion.
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\fBdelwin\fR returns the integer \fBERR\fR upon failure and \fBOK\fR
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upon successful completion.
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Routines that return pointers return \fBNULL\fR on error.
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.SH NOTES
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If many small changes are made to the window, the \fBwsyncup\fR option could
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degrade performance.
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Note that \fBsyncok\fR may be a macro.
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.SH BUGS
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The subwindow functions (\fIsubwin\fR, \fIderwin\fR, etc.) are flaky,
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incompletely implemented, and not well tested, especially in their
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interaction with scrolling.
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.SH SEE ALSO
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\fBncurses\fR(3X), \fBcurs_refresh\fR(3X), \fBcurs_touch\fR(3X)
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.\"#
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.\"# The following sets edit modes for GNU EMACS
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.\"# Local Variables:
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.\"# mode:nroff
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.\"# fill-column:79
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.\"# End:
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