ACE/examples/Misc/test_XtReactor2.cpp

   1 // The following test exercises the Eric C. Newton's <ecn@clark.net>
   2 // XtReactor implementation.
   3
   4 #include "ace/OS_main.h"
   5 #include "ace/XtReactor/XtReactor.h"
   6 #include "ace/Reactor.h"
   7 #include "ace/Message_Block.h"
   8 #include "ace/Log_Msg.h"
   9 #include "ace/OS_NS_unistd.h"
  10
  11 #include <Xm/PushB.h>
  12
  13 class Stdin : public ACE_Event_Handler
  14 {
  15 public:
  16   ACE_HANDLE get_handle () const { return ACE_STDIN; }
  17
  18   int handle_input (ACE_HANDLE)
  19   {
  20     char c;
  21     if (ACE_OS::read (ACE_STDIN, &c, 1)==1)
  22       ACE_DEBUG ((LM_DEBUG,
  23                   "Got input '%d'\n",
  24                   (int) c));
  25     return 0;
  26   }
  27
  28   int handle_timeout (const ACE_Time_Value &tv,
  29                       const void *)
  30   {
  31     ACE_DEBUG ((LM_DEBUG,
  32                 "Timeout! %f\n",
  33                 (double) (tv.msec ()/1000.)));
  34     return 0;
  35   }
  36 };
  37
  38 static void
  39 ActivateCB (Widget, XtPointer, XtPointer)
  40 {
  41   ACE_DEBUG ((LM_DEBUG,
  42               "Button pushed!\n"));
  43 }
  44
  45 int
  46 ACE_TMAIN (int argc, ACE_TCHAR**argv)
  47 {
  48   // The worlds most useless user interface
  49   Widget top_level = XtVaAppInitialize (0,
  50                                         "buttontest",
  51                                         0,
  52                                         0,
  53                                         &argc,
  54                                         argv,
  55                                         0,
  56                                         static_cast<void *>(0));
  57   char change[] = "change"; // XmCreatePushButton() wants a non-const
  58                             // string.
  59   Widget button = XmCreatePushButton (top_level,
  60                                       change,
  61                                       0,
  62                                       0);
  63   XtManageChild (button);
  64   XtAddCallback (button,
  65                  XmNactivateCallback,
  66                  ActivateCB,
  67                  0);
  68
  69   // A reactor beastie.
  70   ACE_XtReactor xreactor (XtWidgetToApplicationContext (top_level));
  71   ACE_Reactor reactor (&xreactor);
  72
  73   // Print a message when data is recv'd on stdin...
  74   ACE_Event_Handler * stdin_;
  75   ACE_NEW_RETURN (stdin_,
  76                   Stdin,
  77                   -1);
  78   reactor.register_handler (stdin_,
  79                             ACE_Event_Handler::READ_MASK);
  80
  81   // Print a message every 10 seconds
  82   if (reactor.schedule_timer (stdin_, 0,
  83                               ACE_Time_Value (10),
  84                               ACE_Time_Value (10)) == -1)
  85     ACE_ERROR_RETURN ((LM_ERROR,
  86                        "%p\n",
  87                        "schedule_timer"), -1);
  88
  89   // Show the top_level widget
  90   XtRealizeWidget (top_level);
  91
  92   // Demonstrate Reactor/Xt event loop unification:
  93   XtAppMainLoop (XtWidgetToApplicationContext (top_level));
  94 }