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Text File  |  1995-07-08  |  2KB  |  60 lines
  1. /*
  2.     ####             #    #     # #
  3.     #   #            #    #       #          The FreeWare C library for 
  4.     #   #  ##   ###  #  # #     # ###             RISC OS machines
  5.     #   # #  # #     # #  #     # #  #   ___________________________________
  6.     #   # ####  ###  ##   #     # #  #                                      
  7.     #   # #        # # #  #     # #  #    Please refer to the accompanying
  8.     ####   ### ####  #  # ##### # ###    documentation for conditions of use
  9.     ________________________________________________________________________
  10.  
  11.     File:    Icon.printf.c
  12.     Author:  Copyright © 1992, 1993, 1994 Jason Williams
  13.              Concept by Edouard Poor
  14.     Version: 1.02 (12 Mar 1994)
  15.     Purpose: Do a "printf" into an icon's indirected text string
  16. */
  17.  
  18. #include <stdarg.h>
  19. #include <stdio.h>
  20. #include <string.h>
  21.  
  22. #include "DeskLib:Wimp.h"
  23. #include "DeskLib:WimpSWIs.h"
  24. #include "DeskLib:Icon.h"
  25.  
  26. extern void Icon_printf(window_handle window, icon_handle icon,
  27.                         char *format, ...)
  28. {
  29.   va_list    argp;
  30.   char       temp[512];   /* Longer strings will break this call */
  31.   icon_block istate;
  32.   caret_block caret;
  33.   int         len;
  34.  
  35.   Wimp_GetIconState(window, icon, &istate);
  36.   if (!istate.flags.data.indirected)
  37.     return;
  38.  
  39.   va_start(argp,format);
  40.   vsprintf(temp, format, argp);
  41.   strncpy(istate.data.indirecttext.buffer, temp,
  42.           istate.data.indirecttext.bufflen - 1);
  43.   istate.data.indirecttext.buffer[istate.data.indirecttext.bufflen - 1] = 0;
  44.   va_end(argp);
  45.  
  46.   /* Ensure caret isn't beyond end of text */
  47.   Wimp_GetCaretPosition( &caret );
  48.   if ( caret.window == window && caret.icon == icon )
  49.   {
  50.     len = strlen( istate.data.indirecttext.buffer );
  51.     if ( caret.index > len )
  52.     {
  53.       caret.index = len;
  54.       Wimp_SetCaretPosition( &caret );
  55.     }
  56.   }
  57.   
  58.   Wimp_SetIconState(window, icon, 0, 0);
  59. }
  60.