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Text File  |  1993-07-13  |  1.4 KB  |  45 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 Jason Williams
  13.              Concept by Edouard Poor
  14.     Version: 1.01 (14 Jul 1993)
  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 "Wimp.h"
  23. #include "WimpSWIs.h"
  24.  
  25. extern void Icon_printf(window_handle window, icon_handle icon,
  26.                         char *format, ...)
  27. {
  28.   va_list    argp;
  29.   char       temp[512];   /* Longer strings will break this call */
  30.   icon_block istate;
  31.  
  32.   Wimp_GetIconState(window, icon, &istate);
  33.   if (!istate.flags.data.indirected)
  34.     return;
  35.  
  36.   va_start(argp,format);
  37.   vsprintf(temp, format, argp);
  38.   strncpy(istate.data.indirecttext.buffer, temp,
  39.           istate.data.indirecttext.bufflen - 1);
  40.   istate.data.indirecttext.buffer[istate.data.indirecttext.bufflen - 1] = 0;
  41.   va_end(argp);
  42.  
  43.   Wimp_SetIconState(window, icon, 0, 0);
  44. }
  45.