doc/html/man/curs_window.3x.html

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  30   * @Id: curs_window.3x,v 1.21 2020/02/02 23:34:34 tom Exp @
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  42 <H1 class="no-header">curs_window 3x</H1>
  43 <PRE>
  44 <STRONG><A HREF="curs_window.3x.html">curs_window(3x)</A></STRONG>                                                <STRONG><A HREF="curs_window.3x.html">curs_window(3x)</A></STRONG>
  45
  46
  47
  48
  49 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
  50        <STRONG>newwin</STRONG>, <STRONG>delwin</STRONG>, <STRONG>mvwin</STRONG>, <STRONG>subwin</STRONG>, <STRONG>derwin</STRONG>, <STRONG>mvderwin</STRONG>, <STRONG>dupwin</STRONG>, <STRONG>wsyncup</STRONG>,
  51        <STRONG>syncok</STRONG>, <STRONG>wcursyncup</STRONG>, <STRONG>wsyncdown</STRONG> - create <STRONG>curses</STRONG> windows
  52
  53
  54 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
  55        <STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
  56
  57        <STRONG>WINDOW</STRONG> <STRONG>*newwin(</STRONG>
  58              <STRONG>int</STRONG> <EM>nlines</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>ncols</EM><STRONG>,</STRONG>
  59              <STRONG>int</STRONG> <EM>begin</EM><STRONG>_</STRONG><EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>begin</EM><STRONG>_</STRONG><EM>x</EM><STRONG>);</STRONG>
  60        <STRONG>int</STRONG> <STRONG>delwin(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
  61        <STRONG>int</STRONG> <STRONG>mvwin(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>);</STRONG>
  62        <STRONG>WINDOW</STRONG> <STRONG>*subwin(WINDOW</STRONG> <STRONG>*</STRONG><EM>orig</EM><STRONG>,</STRONG>
  63              <STRONG>int</STRONG> <EM>nlines</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>ncols</EM><STRONG>,</STRONG>
  64              <STRONG>int</STRONG> <EM>begin</EM><STRONG>_</STRONG><EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>begin</EM><STRONG>_</STRONG><EM>x</EM><STRONG>);</STRONG>
  65        <STRONG>WINDOW</STRONG> <STRONG>*derwin(WINDOW</STRONG> <STRONG>*</STRONG><EM>orig</EM><STRONG>,</STRONG>
  66              <STRONG>int</STRONG> <EM>nlines</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>ncols</EM><STRONG>,</STRONG>
  67              <STRONG>int</STRONG> <EM>begin</EM><STRONG>_</STRONG><EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>begin</EM><STRONG>_</STRONG><EM>x</EM><STRONG>);</STRONG>
  68        <STRONG>int</STRONG> <STRONG>mvderwin(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>par</EM><STRONG>_</STRONG><EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>par</EM><STRONG>_</STRONG><EM>x</EM><STRONG>);</STRONG>
  69        <STRONG>WINDOW</STRONG> <STRONG>*dupwin(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
  70        <STRONG>void</STRONG> <STRONG>wsyncup(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
  71        <STRONG>int</STRONG> <STRONG>syncok(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>bool</STRONG> <EM>bf</EM><STRONG>);</STRONG>
  72        <STRONG>void</STRONG> <STRONG>wcursyncup(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
  73        <STRONG>void</STRONG> <STRONG>wsyncdown(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>);</STRONG>
  74
  75
  76 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
  77
  78 </PRE><H3><a name="h3-newwin">newwin</a></H3><PRE>
  79        Calling <STRONG>newwin</STRONG> creates and returns a pointer to a new window  with  the
  80        given  number  of lines and columns.  The upper left-hand corner of the
  81        window is at
  82               line <EM>begin</EM>_<EM>y</EM>,
  83               column <EM>begin</EM>_<EM>x</EM>
  84
  85        If either <EM>nlines</EM> or <EM>ncols</EM> is zero, they default to
  86               <STRONG>LINES</STRONG> <STRONG>-</STRONG> <EM>begin</EM>_<EM>y</EM> and
  87               <STRONG>COLS</STRONG> <STRONG>-</STRONG> <EM>begin</EM>_<EM>x</EM>.
  88
  89        A new full-screen window is created by calling <STRONG>newwin(0,0,0,0)</STRONG>.
  90
  91
  92 </PRE><H3><a name="h3-delwin">delwin</a></H3><PRE>
  93        Calling <STRONG>delwin</STRONG> deletes the named window, freeing all memory  associated
  94        with  it  (it does not actually erase the window's screen image).  Sub-
  95        windows must be deleted before the main window can be deleted.
  96
  97
  98 </PRE><H3><a name="h3-mvwin">mvwin</a></H3><PRE>
  99        Calling <STRONG>mvwin</STRONG> moves the window so that the upper left-hand corner is at
 100        position  (<EM>x</EM>,  <EM>y</EM>).   If  the  move would cause the window to be off the
 101        screen, it is an error and the window is not moved.  Moving  subwindows
 102        is allowed, but should be avoided.
 103
 104
 105 </PRE><H3><a name="h3-subwin">subwin</a></H3><PRE>
 106        Calling  <STRONG>subwin</STRONG>  creates and returns a pointer to a new window with the
 107        given number of lines, <EM>nlines</EM>, and columns, <EM>ncols</EM>.  The  window  is  at
 108        position (<EM>begin</EM>_<EM>y</EM>, <EM>begin</EM>_<EM>x</EM>) on the screen.  The subwindow shares memory
 109        with the window <EM>orig</EM>, so that changes made to one  window  will  affect
 110        both  windows.  When using this routine, it is necessary to call <STRONG>touch-</STRONG>
 111        <STRONG>win</STRONG> or <STRONG>touchline</STRONG> on <EM>orig</EM> before calling <STRONG>wrefresh</STRONG> on the subwindow.
 112
 113
 114 </PRE><H3><a name="h3-derwin">derwin</a></H3><PRE>
 115        Calling <STRONG>derwin</STRONG> is the same as calling <STRONG>subwin,</STRONG> except that  <EM>begin</EM>_<EM>y</EM>  and
 116        <EM>begin</EM>_<EM>x</EM>  are  relative to the origin of the window <EM>orig</EM> rather than the
 117        screen.  There is no difference between the subwindows and the  derived
 118        windows.
 119
 120        Calling  <STRONG>mvderwin</STRONG> moves a derived window (or subwindow) inside its par-
 121        ent window.  The screen-relative  parameters  of  the  window  are  not
 122        changed.  This routine is used to display different parts of the parent
 123        window at the same physical position on the screen.
 124
 125
 126 </PRE><H3><a name="h3-dupwin">dupwin</a></H3><PRE>
 127        Calling <STRONG>dupwin</STRONG> creates an exact duplicate of the window <EM>win</EM>.
 128
 129
 130 </PRE><H3><a name="h3-wsyncup">wsyncup</a></H3><PRE>
 131        Calling <STRONG>wsyncup</STRONG> touches all locations in  ancestors  of  <EM>win</EM>  that  are
 132        changed  in  <EM>win</EM>.   If  <STRONG>syncok</STRONG> is called with second argument <STRONG>TRUE</STRONG> then
 133        <STRONG>wsyncup</STRONG> is called automatically whenever there is a change in the  win-
 134        dow.
 135
 136
 137 </PRE><H3><a name="h3-wsyncdown">wsyncdown</a></H3><PRE>
 138        The  <STRONG>wsyncdown</STRONG>  routine  touches  each  location  in  <EM>win</EM> that has been
 139        touched in any of its ancestor windows.  This routine is called by <STRONG>wre-</STRONG>
 140        <STRONG>fresh</STRONG>, so it should almost never be necessary to call it manually.
 141
 142
 143 </PRE><H3><a name="h3-wcursyncup">wcursyncup</a></H3><PRE>
 144        The  routine  <STRONG>wcursyncup</STRONG> updates the current cursor position of all the
 145        ancestors of the window to reflect the current cursor position  of  the
 146        window.
 147
 148
 149 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
 150        Routines that return an integer return the integer <STRONG>ERR</STRONG> upon failure and
 151        <STRONG>OK</STRONG> (SVr4 only specifies "an integer value other than  <STRONG>ERR</STRONG>")  upon  suc-
 152        cessful completion.
 153
 154        Routines that return pointers return <STRONG>NULL</STRONG> on error.
 155
 156        X/Open defines no error conditions.  In this implementation
 157
 158        <STRONG>delwin</STRONG>
 159             returns  an  error if the window pointer is null, or if the window
 160             is the parent of another window.
 161
 162        <STRONG>derwin</STRONG>
 163             returns an error if the parent window pointer is null, or  if  any
 164             of  its  ordinates  or dimensions is negative, or if the resulting
 165             window does not fit inside the parent window.
 166
 167        <STRONG>dupwin</STRONG>
 168             returns an error if the window pointer is null.
 169
 170             This implementation also maintains a list of windows,  and  checks
 171             that  the pointer passed to <STRONG>delwin</STRONG> is one that it created, return-
 172             ing an error if it was not..
 173
 174        <STRONG>mvderwin</STRONG>
 175             returns an error if the window pointer is null, or if some part of
 176             the window would be placed off-screen.
 177
 178        <STRONG>mvwin</STRONG>
 179             returns  an  error if the window pointer is null, or if the window
 180             is really a pad, or if some part of the  window  would  be  placed
 181             off-screen.
 182
 183        <STRONG>newwin</STRONG>
 184             will  fail if either of its beginning ordinates is negative, or if
 185             either the number of lines or columns is negative.
 186
 187        <STRONG>syncok</STRONG>
 188             returns an error if the window pointer is null.
 189
 190        <STRONG>subwin</STRONG>
 191             returns an error if the parent window pointer is null, or  if  any
 192             of  its  ordinates  or dimensions is negative, or if the resulting
 193             window does not fit inside the parent window.
 194
 195        The functions which return a window pointer may also fail if  there  is
 196        insufficient  memory  for  its data structures.  Any of these functions
 197        will fail if the screen has not been initialized, i.e., with <STRONG>initscr</STRONG> or
 198        <STRONG>newterm</STRONG>.
 199
 200
 201 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
 202        If  many small changes are made to the window, the <STRONG>wsyncup</STRONG> option could
 203        degrade performance.
 204
 205        Note that <STRONG>syncok</STRONG> may be a macro.
 206
 207
 208 </PRE><H2><a name="h2-BUGS">BUGS</a></H2><PRE>
 209        The subwindow functions (<STRONG>subwin</STRONG>, <STRONG>derwin</STRONG>, <STRONG>mvderwin</STRONG>, <STRONG>wsyncup</STRONG>,  <STRONG>wsyncdown</STRONG>,
 210        <STRONG>wcursyncup</STRONG>,  <STRONG>syncok</STRONG>)  are flaky, incompletely implemented, and not well
 211        tested.
 212
 213        The System V curses documentation is very unclear  about  what  <STRONG>wsyncup</STRONG>
 214        and  <STRONG>wsyncdown</STRONG>  actually do.  It seems to imply that they are only sup-
 215        posed to touch exactly  those  lines  that  are  affected  by  ancestor
 216        changes.  The language here, and the behavior of the <STRONG>curses</STRONG> implementa-
 217        tion, is patterned on the XPG4 curses standard.  The weaker  XPG4  spec
 218        may result in slower updates.
 219
 220
 221 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
 222        The XSI Curses standard, Issue 4 describes these functions.
 223
 224
 225 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
 226        <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_variables.3x.html">curs_variables(3x)</A></STRONG>
 227
 228
 229
 230                                                                <STRONG><A HREF="curs_window.3x.html">curs_window(3x)</A></STRONG>
 231 </PRE>
 232 <div class="nav">
 233 <ul>
 234 <li><a href="#h2-NAME">NAME</a></li>
 235 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
 236 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
 237 <ul>
 238 <li><a href="#h3-newwin">newwin</a></li>
 239 <li><a href="#h3-delwin">delwin</a></li>
 240 <li><a href="#h3-mvwin">mvwin</a></li>
 241 <li><a href="#h3-subwin">subwin</a></li>
 242 <li><a href="#h3-derwin">derwin</a></li>
 243 <li><a href="#h3-dupwin">dupwin</a></li>
 244 <li><a href="#h3-wsyncup">wsyncup</a></li>
 245 <li><a href="#h3-wsyncdown">wsyncdown</a></li>
 246 <li><a href="#h3-wcursyncup">wcursyncup</a></li>
 247 </ul>
 248 </li>
 249 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
 250 <li><a href="#h2-NOTES">NOTES</a></li>
 251 <li><a href="#h2-BUGS">BUGS</a></li>
 252 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
 253 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
 254 </ul>
 255 </div>
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