mdw@git.distorted.org.uk Git - ssr/blob - StraySrc/Libraries/Steel/c/visdelay

   1 /*
   2  * videlay
   3  *
   4  * Provides a bit more control than the original version
   5  *
   6  * © 1994-1998 Straylight
   7  */
   8
   9 /*----- Licensing note ----------------------------------------------------*
  10  *
  11  * This file is part of Straylight's Steel library.
  12  *
  13  * Steel is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2, or (at your option)
  16  * any later version.
  17  *
  18  * Steel is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with Steel.  If not, write to the Free Software Foundation,
  25  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26  */
  27
  28 #include "visdelay.h"
  29 #include "os.h"
  30 #include "swiv.h"
  31 #include "swis.h"
  32 #include "wimpt.h"
  33 #include <stdlib.h>
  34
  35 #include "dll.h"
  36
  37 #ifndef _dll_NODLL
  38   extern void _dllEntry(visdelay__exitHandler)(void);
  39 #endif
  40
  41 static visdelay_state visdelay__state={0,-1};
  42 static BOOL visdelay__exit;
  43
  44 /*
  45  * void visdelay__exitHandler(void)
  46  *
  47  * Use
  48  *  Shuts the hourglass off if we've used it
  49  */
  50
  51 _dll_static void visdelay__exitHandler(void)
  52 {
  53   if (visdelay__state.count)
  54     wimpt_noerr(_swix(XHourglass_Off,0));
  55 }
  56
  57 /*
  58  * void visdelay_begin(void)
  59  *
  60  * Use
  61  *  Starts the hourglass.
  62  */
  63
  64 void visdelay_begin(void)
  65 {
  66   if (!visdelay__state.count)
  67   {
  68     wimpt_noerr(_swix(XHourglass_On,0));
  69     visdelay__state.percent=-1;
  70   }
  71   visdelay__state.count++;
  72   if (!visdelay__exit)
  73   {
  74     atexit(_dllEntry(visdelay__exitHandler));
  75     visdelay__exit=TRUE;
  76   }
  77 }
  78
  79 /*
  80  * void visdelay_end(void)
  81  *
  82  * Use
  83  *  Turns off the hourglass.  Note that calls to visdelay_begin() and
  84  *  visdelay_end() must be matched.
  85  */
  86
  87 void visdelay_end(void)
  88 {
  89   if (visdelay__state.count)
  90   {
  91     visdelay__state.count--;
  92     wimpt_noerr(_swix(XHourglass_Off,0));
  93   }
  94 }
  95
  96 /*
  97  * void visdelay_percent(int percent)
  98  *
  99  * Use
 100  *  Puts up the little percentage indicator on the hourglass.
 101  *
 102  * Parameters
 103  *  int percent == the percentage number to indicate.
 104  */
 105
 106 void visdelay_percent(int percent)
 107 {
 108   wimpt_noerr(_swix(XHourglass_Percentage,_in(0),percent));
 109   visdelay__state.percent=percent;
 110 }
 111
 112 /*
 113  * visdelay_state visdelay_suspend(void)
 114  *
 115  * Use
 116  *  Turns the hourglass right off.  It also returns information about the
 117  *  current state of the hourglass so that it can be resumed.
 118  *
 119  * Returns
 120  *  State information recorded in an undefined manner.
 121  */
 122
 123 visdelay_state visdelay_suspend(void)
 124 {
 125   visdelay_state c=visdelay__state;
 126   wimpt_noerr(_swix(XHourglass_Off,0));
 127   visdelay__state.count=0;
 128   return (c);
 129 }
 130
 131 /*
 132  * void visdelay_resume(visdelay_state state)
 133  *
 134  * Use
 135  *  Returns the hourglass to the state it was in when the last
 136  *  visdelay_suspend() call was made.
 137  *
 138  * Parameters
 139  *  visdelay_state state == the hourglass state as returned by
 140  *  visdelay_suspend().
 141  */
 142
 143 void visdelay_resume(visdelay_state state)
 144 {
 145   visdelay__state=state;
 146   if (visdelay__state.count)
 147   {
 148     wimpt_noerr(_swix(XHourglass_On,0));
 149     wimpt_noerr(_swix(XHourglass_Percentage,_in(0),visdelay__state.percent));
 150   }
 151 }