release/src/router/libncurses/doc/html/man/curs_pad.3x.html

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  41 <H1 class="no-header">curs_pad 3x</H1>
  42 <PRE>
  43 <STRONG><A HREF="curs_pad.3x.html">curs_pad(3x)</A></STRONG>                                               <STRONG><A HREF="curs_pad.3x.html">curs_pad(3x)</A></STRONG>
  44
  45
  46
  47
  48 </PRE>
  49 <H2><a name="h2-NAME">NAME</a></H2><PRE>
  50        <STRONG>newpad</STRONG>, <STRONG>subpad</STRONG>, <STRONG>prefresh</STRONG>, <STRONG>pnoutrefresh</STRONG>, <STRONG>pechochar</STRONG>,
  51        <STRONG>pecho_wchar</STRONG> - create and display <STRONG>curses</STRONG> pads
  52
  53
  54 </PRE>
  55 <H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
  56        <STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
  57
  58        <STRONG>WINDOW</STRONG> <STRONG>*newpad(int</STRONG> <EM>nlines</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>ncols</EM><STRONG>);</STRONG>
  59        <STRONG>WINDOW</STRONG> <STRONG>*subpad(WINDOW</STRONG> <STRONG>*</STRONG><EM>orig</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>nlines</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>ncols</EM><STRONG>,</STRONG>
  60              <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>
  61        <STRONG>int</STRONG> <STRONG>prefresh(WINDOW</STRONG> <STRONG>*</STRONG><EM>pad</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>pminrow</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>pmincol</EM><STRONG>,</STRONG>
  62              <STRONG>int</STRONG> <EM>sminrow</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>smincol</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>smaxrow</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>smaxcol</EM><STRONG>);</STRONG>
  63        <STRONG>int</STRONG> <STRONG>pnoutrefresh(WINDOW</STRONG> <STRONG>*</STRONG><EM>pad</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>pminrow</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>pmincol</EM><STRONG>,</STRONG>
  64              <STRONG>int</STRONG> <EM>sminrow</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>smincol</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>smaxrow</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>smaxcol</EM><STRONG>);</STRONG>
  65        <STRONG>int</STRONG> <STRONG>pechochar(WINDOW</STRONG> <STRONG>*</STRONG><EM>pad</EM><STRONG>,</STRONG> <STRONG>chtype</STRONG> <EM>ch</EM><STRONG>);</STRONG>
  66        <STRONG>int</STRONG> <STRONG>pecho_wchar(WINDOW</STRONG> <STRONG>*</STRONG><EM>pad</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>cchar_t</STRONG> <STRONG>*</STRONG><EM>wch</EM><STRONG>);</STRONG>
  67
  68
  69 </PRE>
  70 <H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
  71
  72 </PRE>
  73 <H3><a name="h3-newpad">newpad</a></H3><PRE>
  74        The <STRONG>newpad</STRONG> routine creates and returns a pointer to a  new
  75        pad data structure with the given number of lines, <EM>nlines</EM>,
  76        and columns, <EM>ncols</EM>.  A pad is like a window,  except  that
  77        it is not restricted by the screen size, and is not neces-
  78        sarily associated with a particular part  of  the  screen.
  79        Pads can be used when a large window is needed, and only a
  80        part of the window will be on the screen at one time.  Au-
  81        tomatic refreshes of pads (e.g., from scrolling or echoing
  82        of input) do not occur.  It is not legal to call  <STRONG>wrefresh</STRONG>
  83        with  a  <EM>pad</EM>  as  an  argument;  the  routines <STRONG>prefresh</STRONG> or
  84        <STRONG>pnoutrefresh</STRONG> should be called instead.   Note  that  these
  85        routines require additional parameters to specify the part
  86        of the pad to be displayed and the location on the  screen
  87        to be used for the display.
  88
  89
  90 </PRE>
  91 <H3><a name="h3-subpad">subpad</a></H3><PRE>
  92        The <STRONG>subpad</STRONG> routine creates and returns a pointer to a sub-
  93        window within a  pad  with  the  given  number  of  lines,
  94        <EM>nlines</EM>,  and  columns,  <EM>ncols</EM>.   Unlike <STRONG>subwin</STRONG>, which uses
  95        screen coordinates, the window is  at  position  (<EM>begin</EM>_<EM>x</EM><STRONG>,</STRONG>
  96        <EM>begin</EM>_<EM>y</EM>)  on the pad.  The window is made in the middle of
  97        the window <EM>orig</EM>, so that changes made to one window affect
  98        both windows.  During the use of this routine, it will of-
  99        ten be necessary to call <STRONG>touchwin</STRONG> or <STRONG>touchline</STRONG> on <EM>orig</EM> be-
 100        fore calling <STRONG>prefresh</STRONG>.
 101
 102
 103 </PRE>
 104 <H3><a name="h3-prefresh_-pnoutrefresh">prefresh, pnoutrefresh</a></H3><PRE>
 105        The  <STRONG>prefresh</STRONG>  and  <STRONG>pnoutrefresh</STRONG> routines are analogous to
 106        <STRONG>wrefresh</STRONG> and <STRONG>wnoutrefresh</STRONG> except that they relate to  pads
 107        instead  of windows.  The additional parameters are needed
 108        to indicate what part of the pad and screen are  involved.
 109        The <EM>pminrow</EM> and <EM>pmincol</EM> parameters specify the upper left-
 110        hand corner of the rectangle to be displayed in  the  pad.
 111        The  <EM>sminrow</EM>,  <EM>smincol</EM>,  <EM>smaxrow</EM>,  and  <EM>smaxcol</EM> parameters
 112        specify the edges of the rectangle to be displayed on  the
 113        screen.   The  lower right-hand corner of the rectangle to
 114        be displayed in the pad is calculated from the screen  co-
 115        ordinates,  since  the  rectangles  must be the same size.
 116        Both rectangles must be entirely  contained  within  their
 117        respective  structures.  Negative values of <EM>pminrow</EM>, <EM>pmin-</EM>
 118        <EM>col</EM>, <EM>sminrow</EM>, or <EM>smincol</EM> are treated as if they were zero.
 119
 120
 121 </PRE>
 122 <H3><a name="h3-pechochar">pechochar</a></H3><PRE>
 123        The <STRONG>pechochar</STRONG> routine is functionally equivalent to a call
 124        to  <STRONG>addch</STRONG>  followed by a call to <STRONG>refresh</STRONG>, a call to <STRONG>waddch</STRONG>
 125        followed by a call to <STRONG>wrefresh</STRONG>, or a call to  <STRONG>waddch</STRONG>  fol-
 126        lowed  by  a  call to <STRONG>prefresh</STRONG>.  The knowledge that only a
 127        single character is being output is taken into  considera-
 128        tion  and, for non-control characters, a considerable per-
 129        formance gain might be seen by using  these  routines  in-
 130        stead of their equivalents.  In the case of <STRONG>pechochar</STRONG>, the
 131        last location of the pad on the screen is reused  for  the
 132        arguments to <STRONG>prefresh</STRONG>.
 133
 134
 135 </PRE>
 136 <H3><a name="h3-pecho_wchar">pecho_wchar</a></H3><PRE>
 137        The  <STRONG>pecho_wchar</STRONG>  function is the analogous wide-character
 138        form of <STRONG>pechochar</STRONG>.  It outputs one character to a pad  and
 139        immediately  refreshes the pad.  It does this by a call to
 140        <STRONG>wadd_wch</STRONG> followed by a call to <STRONG>prefresh</STRONG>.
 141
 142
 143 </PRE>
 144 <H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
 145        Routines that return an integer return  <STRONG>ERR</STRONG>  upon  failure
 146        and  <STRONG>OK</STRONG>  (SVr4 only specifies "an integer value other than
 147        <STRONG>ERR</STRONG>") upon successful completion.
 148
 149        Routines that return pointers return <STRONG>NULL</STRONG>  on  error,  and
 150        set <STRONG>errno</STRONG> to <STRONG>ENOMEM</STRONG>.
 151
 152        X/Open  does not define any error conditions.  In this im-
 153        plementation
 154
 155           <STRONG>prefresh</STRONG> and <STRONG>pnoutrefresh</STRONG>
 156                return an error if the window pointer is null,  or
 157                if  the  window is not really a pad or if the area
 158                to refresh extends off-screen or  if  the  minimum
 159                coordinates are greater than the maximum.
 160
 161           <STRONG>pechochar</STRONG>
 162                returns  an  error  if  the window is not really a
 163                pad, and the associated call to <STRONG>wechochar</STRONG>  returns
 164                an error.
 165
 166           <STRONG>pecho_wchar</STRONG>
 167                returns  an  error  if  the window is not really a
 168                pad, and the associated call  to  <STRONG>wecho_wchar</STRONG>  re-
 169                turns an error.
 170
 171
 172 </PRE>
 173 <H2><a name="h2-NOTES">NOTES</a></H2><PRE>
 174        Note that <STRONG>pechochar</STRONG> may be a macro.
 175
 176
 177 </PRE>
 178 <H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
 179        The  XSI  Curses  standard,  Issue 4 describes these func-
 180        tions.
 181
 182
 183 </PRE>
 184 <H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
 185        <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_add-</STRONG>
 186        <STRONG><A HREF="curs_addch.3x.html">ch(3x)</A></STRONG>.
 187
 188
 189
 190                                                            <STRONG><A HREF="curs_pad.3x.html">curs_pad(3x)</A></STRONG>
 191 </PRE>
 192 <div class="nav">
 193 <ul>
 194 <li><a href="#h2-NAME">NAME</a></li>
 195 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
 196 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
 197 <ul>
 198 <li><a href="#h3-newpad">newpad</a></li>
 199 <li><a href="#h3-subpad">subpad</a></li>
 200 <li><a href="#h3-prefresh_-pnoutrefresh">prefresh, pnoutrefresh</a></li>
 201 <li><a href="#h3-pechochar">pechochar</a></li>
 202 <li><a href="#h3-pecho_wchar">pecho_wchar</a></li>
 203 </ul>
 204 </li>
 205 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
 206 <li><a href="#h2-NOTES">NOTES</a></li>
 207 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
 208 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
 209 </ul>
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