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

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  41 <H1 class="no-header">curs_window 3x</H1>
  42 <PRE>
  43 <STRONG><A HREF="curs_window.3x.html">curs_window(3x)</A></STRONG>                                         <STRONG><A HREF="curs_window.3x.html">curs_window(3x)</A></STRONG>
  44
  45
  46
  47
  48 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
  49        <STRONG>newwin</STRONG>, <STRONG>delwin</STRONG>, <STRONG>mvwin</STRONG>, <STRONG>subwin</STRONG>, <STRONG>derwin</STRONG>, <STRONG>mvderwin</STRONG>, <STRONG>dupwin</STRONG>,
  50        <STRONG>wsyncup</STRONG>, <STRONG>syncok</STRONG>, <STRONG>wcursyncup</STRONG>, <STRONG>wsyncdown</STRONG> - create <STRONG>curses</STRONG>
  51        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 win-
  80        dow with the given number of lines and columns.  The upper
  81        left-hand corner of the 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
  90        <STRONG>newwin(0,0,0,0)</STRONG>.
  91
  92
  93 </PRE><H3><a name="h3-delwin">delwin</a></H3><PRE>
  94        Calling <STRONG>delwin</STRONG> deletes the named window, freeing all memo-
  95        ry associated with it (it does not actually erase the win-
  96        dow's screen image).  Subwindows must  be  deleted  before
  97        the main window can be deleted.
  98
  99
 100 </PRE><H3><a name="h3-mvwin">mvwin</a></H3><PRE>
 101        Calling <STRONG>mvwin</STRONG> moves the window so that the upper left-hand
 102        corner is at position (<EM>x</EM>, <EM>y</EM>).  If the move would cause the
 103        window to be off the screen, it is an error and the window
 104        is not moved.  Moving subwindows is allowed, but should be
 105        avoided.
 106
 107
 108 </PRE><H3><a name="h3-subwin">subwin</a></H3><PRE>
 109        Calling <STRONG>subwin</STRONG> creates and returns a pointer to a new win-
 110        dow with the given number of lines, <EM>nlines</EM>,  and  columns,
 111        <EM>ncols</EM>.   The  window  is at position (<EM>begin</EM>_<EM>y</EM>, <EM>begin</EM>_<EM>x</EM>) on
 112        the screen.  The subwindow shares memory with  the  window
 113        <EM>orig</EM>,  so that changes made to one window will affect both
 114        windows.  When using this routine, it is necessary to call
 115        <STRONG>touchwin</STRONG>  or  <STRONG>touchline</STRONG> on <EM>orig</EM> before calling <STRONG>wrefresh</STRONG> on
 116        the subwindow.
 117
 118
 119 </PRE><H3><a name="h3-derwin">derwin</a></H3><PRE>
 120        Calling <STRONG>derwin</STRONG> is the same as calling <STRONG>subwin,</STRONG> except  that
 121        <EM>begin</EM>_<EM>y</EM> and <EM>begin</EM>_<EM>x</EM> are relative to the origin of the win-
 122        dow <EM>orig</EM> rather than the screen.  There is  no  difference
 123        between the subwindows and the derived windows.
 124
 125        Calling <STRONG>mvderwin</STRONG> moves a derived window (or subwindow) in-
 126        side its parent window.  The screen-relative parameters of
 127        the  window are not changed.  This routine is used to dis-
 128        play different parts of the  parent  window  at  the  same
 129        physical position on the screen.
 130
 131
 132 </PRE><H3><a name="h3-dupwin">dupwin</a></H3><PRE>
 133        Calling  <STRONG>dupwin</STRONG>  creates  an exact duplicate of the window
 134        <EM>win</EM>.
 135
 136
 137 </PRE><H3><a name="h3-wsyncup">wsyncup</a></H3><PRE>
 138        Calling <STRONG>wsyncup</STRONG> touches all locations in ancestors of  <EM>win</EM>
 139        that  are changed in <EM>win</EM>.  If <STRONG>syncok</STRONG> is called with second
 140        argument <STRONG>TRUE</STRONG> then <STRONG>wsyncup</STRONG> is called automatically whenev-
 141        er there is a change in the window.
 142
 143
 144 </PRE><H3><a name="h3-wsyncdown">wsyncdown</a></H3><PRE>
 145        The  <STRONG>wsyncdown</STRONG>  routine  touches each location in <EM>win</EM> that
 146        has been touched in any of  its  ancestor  windows.   This
 147        routine  is  called by <STRONG>wrefresh</STRONG>, so it should almost never
 148        be necessary to call it manually.
 149
 150
 151 </PRE><H3><a name="h3-wcursyncup">wcursyncup</a></H3><PRE>
 152        The routine <STRONG>wcursyncup</STRONG> updates the current cursor position
 153        of  all the ancestors of the window to reflect the current
 154        cursor position of the window.
 155
 156
 157 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
 158        Routines that return an integer return the integer <STRONG>ERR</STRONG> up-
 159        on  failure  and <STRONG>OK</STRONG> (SVr4 only specifies "an integer value
 160        other than <STRONG>ERR</STRONG>") upon successful completion.
 161
 162        Routines that return pointers return <STRONG>NULL</STRONG> on error.
 163
 164        X/Open defines no error conditions.  In  this  implementa-
 165        tion
 166
 167        <STRONG>delwin</STRONG>
 168             returns an error if the window pointer is null, or if
 169             the window is the parent of another window.
 170
 171        <STRONG>derwin</STRONG>
 172             returns an error if  the  parent  window  pointer  is
 173             null,  or  if  any  of its ordinates or dimensions is
 174             negative, or if the resulting window does not fit in-
 175             side the parent window.
 176
 177        <STRONG>dupwin</STRONG>
 178             returns an error if the window pointer is null.
 179
 180             This implementation also maintains a list of windows,
 181             and checks that the pointer passed to <STRONG>delwin</STRONG>  is  one
 182             that it created, returning an error if it was not..
 183
 184        <STRONG>mvderwin</STRONG>
 185             returns an error if the window pointer is null, or if
 186             some part of the window would be placed off-screen.
 187
 188        <STRONG>mvwin</STRONG>
 189             returns an error if the window pointer is null, or if
 190             the  window  is  really a pad, or if some part of the
 191             window would be placed off-screen.
 192
 193        <STRONG>newwin</STRONG>
 194             will fail if either of  its  beginning  ordinates  is
 195             negative, or if either the number of lines or columns
 196             is negative.
 197
 198        <STRONG>syncok</STRONG>
 199             returns an error if the window pointer is null.
 200
 201        <STRONG>subwin</STRONG>
 202             returns an error if  the  parent  window  pointer  is
 203             null,  or  if  any  of its ordinates or dimensions is
 204             negative, or if the resulting window does not fit in-
 205             side the parent window.
 206
 207        The  functions which return a window pointer may also fail
 208        if there is insufficient memory for its  data  structures.
 209        Any  of  these  functions  will fail if the screen has not
 210        been initialized, i.e., with <STRONG>initscr</STRONG> or <STRONG>newterm</STRONG>.
 211
 212
 213 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
 214        If many small changes are made to the window, the  <STRONG>wsyncup</STRONG>
 215        option could degrade performance.
 216
 217        Note that <STRONG>syncok</STRONG> may be a macro.
 218
 219
 220 </PRE><H2><a name="h2-BUGS">BUGS</a></H2><PRE>
 221        The  subwindow  functions (<STRONG>subwin</STRONG>, <STRONG>derwin</STRONG>, <STRONG>mvderwin</STRONG>, <STRONG>wsyn-</STRONG>
 222        <STRONG>cup</STRONG>, <STRONG>wsyncdown</STRONG>, <STRONG>wcursyncup</STRONG>, <STRONG>syncok</STRONG>) are flaky, incomplete-
 223        ly implemented, and not well tested.
 224
 225        The  System  V  curses documentation is very unclear about
 226        what <STRONG>wsyncup</STRONG> and <STRONG>wsyncdown</STRONG> actually do.  It seems to imply
 227        that  they  are only supposed to touch exactly those lines
 228        that are affected by ancestor changes.  The language here,
 229        and  the  behavior  of  the <STRONG>curses</STRONG> implementation, is pat-
 230        terned on the XPG4 curses standard.  The weaker XPG4  spec
 231        may result in slower updates.
 232
 233
 234 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
 235        The  XSI  Curses  standard,  Issue 4 describes these func-
 236        tions.
 237
 238
 239 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
 240        <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>curs_vari-</STRONG>
 241        <STRONG><A HREF="curs_variables.3x.html">ables(3x)</A></STRONG>
 242
 243
 244
 245                                                         <STRONG><A HREF="curs_window.3x.html">curs_window(3x)</A></STRONG>
 246 </PRE>
 247 <div class="nav">
 248 <ul>
 249 <li><a href="#h2-NAME">NAME</a></li>
 250 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
 251 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
 252 <ul>
 253 <li><a href="#h3-newwin">newwin</a></li>
 254 <li><a href="#h3-delwin">delwin</a></li>
 255 <li><a href="#h3-mvwin">mvwin</a></li>
 256 <li><a href="#h3-subwin">subwin</a></li>
 257 <li><a href="#h3-derwin">derwin</a></li>
 258 <li><a href="#h3-dupwin">dupwin</a></li>
 259 <li><a href="#h3-wsyncup">wsyncup</a></li>
 260 <li><a href="#h3-wsyncdown">wsyncdown</a></li>
 261 <li><a href="#h3-wcursyncup">wcursyncup</a></li>
 262 </ul>
 263 </li>
 264 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
 265 <li><a href="#h2-NOTES">NOTES</a></li>
 266 <li><a href="#h2-BUGS">BUGS</a></li>
 267 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
 268 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
 269 </ul>
 270 </div>
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