- Calling newwin creates and returns a pointer to a new window with the
+ Calling newwin 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 begin_y,
- column begin_x
+ line begin_y,
+ column begin_x
- If either nlines or ncols is zero, they default to
- LINES-begin_y and
- COLS-begin_x.
+ If either nlines or ncols is zero, they default to
+ LINES-begin_y and
+ COLS-begin_x.
- A new full-screen window is created by calling newwin(0,0,0,0).
+ A new full-screen window is created by calling newwin(0,0,0,0).
Regardless of the function used for creating a new window (e.g.,
- newwin, subwin, derwin, newpad), rather than a duplicate (with dupwin),
+ newwin, subwin, derwin, newpad), rather than a duplicate (with dupwin),
all of the window modes are initialized to the default values. These
functions set window modes after a window is created:
@@ -98,130 +98,130 @@
- Calling delwin deletes the named window, freeing all memory associated
+ Calling delwin deletes the named window, freeing all memory associated
with it (it does not actually erase the window's screen image). Sub-
windows must be deleted before the main window can be deleted.
- Calling mvwin moves the window so that the upper left-hand corner is at
- position (x, y). If the move would cause the window to be off the
+ Calling mvwin moves the window so that the upper left-hand corner is at
+ position (x, y). 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 subwin creates and returns a pointer to a new window with the
- given number of lines, nlines, and columns, ncols. The window is at
- position (begin_y, begin_x) on the screen. The subwindow shares memory
- with the window orig, so that changes made to one window will affect
- both windows. When using this routine, it is necessary to call touch-
- win or touchline on orig before calling wrefresh on the subwindow.
+ Calling subwin creates and returns a pointer to a new window with the
+ given number of lines, nlines, and columns, ncols. The window is at
+ position (begin_y, begin_x) on the screen. The subwindow shares memory
+ with the window orig, so that changes made to one window will affect
+ both windows. When using this routine, it is necessary to call touch-
+ win or touchline on orig before calling wrefresh on the subwindow.
- Calling derwin is the same as calling subwin, except that begin_y and
- begin_x are relative to the origin of the window orig rather than the
+ Calling derwin is the same as calling subwin, except that begin_y and
+ begin_x are relative to the origin of the window orig rather than the
screen. There is no difference between the subwindows and the derived
windows.
- Calling mvderwin moves a derived window (or subwindow) inside its par-
+ Calling mvderwin moves a derived window (or subwindow) inside its par-
ent 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.
- Calling wsyncup touches all locations in ancestors of win that are
- changed in win. If syncok is called with second argument TRUE then
- wsyncup is called automatically whenever there is a change in the win-
+ Calling wsyncup touches all locations in ancestors of win that are
+ changed in win. If syncok is called with second argument TRUE then
+ wsyncup is called automatically whenever there is a change in the win-
dow.
- The wsyncdown routine touches each location in win that has been
- touched in any of its ancestor windows. This routine is called by wre-
- fresh, so it should almost never be necessary to call it manually.
+ The wsyncdown routine touches each location in win that has been
+ touched in any of its ancestor windows. This routine is called by wre-
+ fresh, so it should almost never be necessary to call it manually.
- The routine wcursyncup updates the current cursor position of all the
+ The routine wcursyncup updates the current cursor position of all the
ancestors of the window to reflect the current cursor position of the
window.
- Routines that return an integer return the integer ERR upon failure and
- OK (SVr4 only specifies "an integer value other than ERR") upon suc-
+ Routines that return an integer return the integer ERR upon failure and
+ OK (SVr4 only specifies "an integer value other than ERR") upon suc-
cessful completion.
- Routines that return pointers return NULL on error.
+ Routines that return pointers return NULL on error.
X/Open defines no error conditions. In this implementation
- delwin
+ delwin
returns an error if the window pointer is null, or if the window
is the parent of another window.
- derwin
+ derwin
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.
- dupwin
+ dupwin
returns an error if the window pointer is null.
This implementation also maintains a list of windows, and checks
- that the pointer passed to delwin is one that it created, return-
+ that the pointer passed to delwin is one that it created, return-
ing an error if it was not..
- mvderwin
+ mvderwin
returns an error if the window pointer is null, or if some part of
the window would be placed off-screen.
- mvwin
+ mvwin
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.
- newwin
+ newwin
will fail if either of its beginning ordinates is negative, or if
either the number of lines or columns is negative.
- syncok
+ syncok
returns an error if the window pointer is null.
- subwin
+ subwin
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.
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 initscr or
- newterm.
+ will fail if the screen has not been initialized, i.e., with initscr or
+ newterm.
- If many small changes are made to the window, the wsyncup option could
+ If many small changes are made to the window, the wsyncup option could
degrade performance.
- Note that syncok may be a macro.
+ Note that syncok may be a macro.
- The subwindow functions (subwin, derwin, mvderwin, wsyncup, wsyncdown,
- wcursyncup, syncok) are flaky, incompletely implemented, and not well
+ The subwindow functions (subwin, derwin, mvderwin, wsyncup, wsyncdown,
+ wcursyncup, syncok) are flaky, incompletely implemented, and not well
tested.
- The System V curses documentation is very unclear about what wsyncup
- and wsyncdown actually do. It seems to imply that they are only sup-
+ The System V curses documentation is very unclear about what wsyncup
+ and wsyncdown actually do. It seems to imply that they are only sup-
posed to touch exactly those lines that are affected by ancestor
- changes. The language here, and the behavior of the curses implementa-
+ changes. The language here, and the behavior of the curses implementa-
tion, is patterned on the XPG4 curses standard. The weaker XPG4 spec
may result in slower updates.
@@ -231,11 +231,11 @@