src/common/timercmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        common/timercmn.cpp
   3 // Purpose:     wxTimerBase implementation
   4 // Author:      Julian Smart, Guillermo Rodriguez, Vadim Zeitlin
   5 // Modified by: VZ: extracted all non-wxTimer stuff in stopwatch.cpp (20.06.03)
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 //              (c) 1999 Guillermo Rodriguez <guille@iies.es>
  10 // Licence:     wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 // ============================================================================
  14 // declarations
  15 // ============================================================================
  16
  17 // ----------------------------------------------------------------------------
  18 // wxWin headers
  19 // ----------------------------------------------------------------------------
  20
  21 // For compilers that support precompilation, includes "wx.h".
  22 #include "wx/wxprec.h"
  23
  24 #ifdef __BORLANDC__
  25     #pragma hdrstop
  26 #endif
  27
  28 #if wxUSE_TIMER
  29
  30 #ifndef WX_PRECOMP
  31     #include "wx/timer.h"
  32 #endif
  33
  34 // ----------------------------------------------------------------------------
  35 // wxWin macros
  36 // ----------------------------------------------------------------------------
  37
  38 IMPLEMENT_DYNAMIC_CLASS(wxTimerEvent, wxEvent)
  39
  40 // ============================================================================
  41 // wxTimerBase implementation
  42 // ============================================================================
  43
  44 wxTimerBase::~wxTimerBase()
  45 {
  46     // this destructor is required for Darwin
  47 }
  48
  49 void wxTimerBase::Notify()
  50 {
  51     // the base class version generates an event if it has owner - which it
  52     // should because otherwise nobody can process timer events
  53     wxCHECK_RET( m_owner, _T("wxTimer::Notify() should be overridden.") );
  54
  55     wxTimerEvent event(m_idTimer, m_milli);
  56     event.SetEventObject(this);
  57     (void)m_owner->ProcessEvent(event);
  58 }
  59
  60 bool wxTimerBase::Start(int milliseconds, bool oneShot)
  61 {
  62     // under MSW timers only work when they're started from the main thread so
  63     // let the caller know about it
  64 #if wxUSE_THREADS
  65     wxASSERT_MSG( wxThread::IsMain(),
  66                   _T("timer can only be started from the main thread") );
  67 #endif // wxUSE_THREADS
  68
  69     if ( IsRunning() )
  70     {
  71         // not stopping the already running timer might work for some
  72         // platforms (no problems under MSW) but leads to mysterious crashes
  73         // on the others (GTK), so to be on the safe side do it here
  74         Stop();
  75     }
  76
  77     if ( milliseconds != -1 )
  78     {
  79         m_milli = milliseconds;
  80     }
  81
  82     m_oneShot = oneShot;
  83
  84     return true;
  85 }
  86
  87 #endif // wxUSE_TIMER
  88