compiler/alib/hotkey.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 /*****************************************************************************
   7
   8     NAME */
   9
  10 #include <proto/exec.h>
  11 #include <proto/commodities.h>
  12 #include <libraries/commodities.h>
  13
  14 extern struct Library *CxBase;
  15
  16         CxObj *HotKey(
  17
  18 /*  SYNOPSIS */
  19         STRPTR          description,
  20         struct MsgPort *port,
  21         LONG            id
  22                      )
  23
  24 /*  FUNCTION
  25         A simple way to get a hotkey for your program. The program is
  26         posted a message when the user does the specified input action in
  27         'description' regardless of whether the program has input focus or
  28         not. The key combination event is swallowed, that is not sent any
  29         farther in the input system.
  30
  31         It's recommended that the user should be able to specify a
  32         program's hotkey with tooltypes, for instance
  33         HOTKEY="alt shift f5".
  34
  35     INPUTS
  36         description  --  commodities filter description (see
  37                          commodities.library/SetFilter())
  38         port         --  message port the hotkey messages will be sent to
  39         id           --  identifier (see CxSender())
  40
  41     RESULT
  42         A pointer to a filter object which represents the HotKey.
  43
  44     NOTES
  45         Commodities.library must be open at the time of the call.
  46
  47     EXAMPLE
  48
  49     BUGS
  50
  51     SEE ALSO
  52         commodities.library/CxFilter(), commodities.library/CxTranslate(),
  53         commodities.library/CxSender(), commodities.library/SetFilter(),
  54         commodities.library/CxObjError()
  55
  56     INTERNALS
  57
  58     HISTORY
  59
  60     26.04.98  SDuvan  implemented
  61
  62 *****************************************************************************/
  63 {
  64     CxObj  *filter;             /* The objects making up the hotkey */
  65     CxObj  *sender;             /* functionality... */
  66     CxObj  *translator;
  67
  68     if((filter = CxFilter(description)) == NULL)
  69         return NULL;
  70
  71     if((sender = CxSender(port, id)) == NULL)
  72     {
  73         DeleteCxObj(filter);
  74         return NULL;
  75     }
  76
  77     AttachCxObj(filter, sender);
  78
  79     /* Create the commodities equivalent of NIL: */
  80     if((translator = CxTranslate(NULL)) == NULL)
  81     {
  82         DeleteCxObjAll(filter);
  83         return NULL;
  84     }
  85
  86     AttachCxObj(filter, translator);
  87
  88     return filter;
  89
  90 } /* HotKey */