src/osx/carbon/timer.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/carbon/timer.cpp
   3 // Purpose:     wxTimer implementation
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     1998-01-01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #if wxUSE_TIMER
  15
  16 #ifndef WX_PRECOMP
  17     #include "wx/dynarray.h"
  18 #endif
  19
  20 #include "wx/osx/private/timer.h"
  21
  22 #ifdef __WXMAC__
  23     #include "wx/osx/private.h"
  24 #endif
  25
  26 struct MacTimerInfo
  27 {
  28     wxCarbonTimerImpl* m_timer;
  29     EventLoopTimerUPP m_proc;
  30     EventLoopTimerRef   m_timerRef;
  31 };
  32
  33 static pascal void wxProcessTimer( EventLoopTimerRef WXUNUSED(theTimer), void *data )
  34 {
  35     if ( data == NULL )
  36         return;
  37
  38     wxCarbonTimerImpl* timer = (wxCarbonTimerImpl*)data;
  39
  40     if ( timer->IsOneShot() )
  41         timer->Stop();
  42
  43     timer->Notify();
  44 }
  45
  46 wxCarbonTimerImpl::wxCarbonTimerImpl(wxTimer *timer)
  47                  : wxTimerImpl(timer)
  48 {
  49     m_info = new MacTimerInfo();
  50     m_info->m_timer = this;
  51     m_info->m_proc = NULL;
  52     m_info->m_timerRef = kInvalidID;
  53 }
  54
  55 bool wxCarbonTimerImpl::IsRunning() const
  56 {
  57     return ( m_info->m_timerRef != kInvalidID );
  58 }
  59
  60 wxCarbonTimerImpl::~wxCarbonTimerImpl()
  61 {
  62     delete m_info;
  63 }
  64
  65 bool wxCarbonTimerImpl::Start( int milliseconds, bool mode )
  66 {
  67     (void)wxTimerImpl::Start(milliseconds, mode);
  68
  69     wxCHECK_MSG( m_milli > 0, false, wxT("invalid value for timer timeout") );
  70     wxCHECK_MSG( m_info->m_timerRef == NULL, false, wxT("attempting to restart a timer") );
  71
  72     m_info->m_timer = this;
  73     m_info->m_proc = NewEventLoopTimerUPP( &wxProcessTimer );
  74
  75     OSStatus err = InstallEventLoopTimer(
  76         GetMainEventLoop(),
  77         m_milli*kEventDurationMillisecond,
  78         IsOneShot() ? 0 : m_milli * kEventDurationMillisecond,
  79         m_info->m_proc,
  80         this,
  81         &m_info->m_timerRef );
  82     verify_noerr( err );
  83
  84     return true;
  85 }
  86
  87 void wxCarbonTimerImpl::Stop()
  88 {
  89     if (m_info->m_timerRef)
  90         RemoveEventLoopTimer( m_info->m_timerRef );
  91     if (m_info->m_proc)
  92         DisposeEventLoopTimerUPP( m_info->m_proc );
  93
  94     m_info->m_proc = NULL;
  95     m_info->m_timerRef = kInvalidID;
  96 }
  97
  98 #endif // wxUSE_TIMER
  99