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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  22     #pragma implementation "timerbase.h"
  23 #endif
  24
  25 // For compilers that support precompilation, includes "wx.h".
  26 #include "wx/wxprec.h"
  27
  28 #ifdef __BORLANDC__
  29     #pragma hdrstop
  30 #endif
  31
  32 #if wxUSE_TIMER
  33
  34 #ifndef WX_PRECOMP
  35     #include "wx/timer.h"
  36 #endif
  37
  38 // ----------------------------------------------------------------------------
  39 // wxWin macros
  40 // ----------------------------------------------------------------------------
  41
  42 IMPLEMENT_DYNAMIC_CLASS(wxTimerEvent, wxEvent)
  43
  44 // ============================================================================
  45 // wxTimerBase implementation
  46 // ============================================================================
  47
  48 wxTimerBase::~wxTimerBase()
  49 {
  50     // this destructor is required for Darwin
  51 }
  52
  53 void wxTimerBase::Notify()
  54 {
  55     // the base class version generates an event if it has owner - which it
  56     // should because otherwise nobody can process timer events
  57     wxCHECK_RET( m_owner, _T("wxTimer::Notify() should be overridden.") );
  58
  59     wxTimerEvent event(m_idTimer, m_milli);
  60     (void)m_owner->ProcessEvent(event);
  61 }
  62
  63 bool wxTimerBase::Start(int milliseconds, bool oneShot)
  64 {
  65     // under MSW timers only work when they're started from the main thread so
  66     // let the caller know about it
  67 #if wxUSE_THREADS
  68     wxASSERT_MSG( wxThread::IsMain(),
  69                   _T("timer can only be started from the main thread") );
  70 #endif // wxUSE_THREADS
  71
  72     if ( IsRunning() )
  73     {
  74         // not stopping the already running timer might work for some
  75         // platforms (no problems under MSW) but leads to mysterious crashes
  76         // on the others (GTK), so to be on the safe side do it here
  77         Stop();
  78     }
  79
  80     if ( milliseconds != -1 )
  81     {
  82         m_milli = milliseconds;
  83     }
  84
  85     m_oneShot = oneShot;
  86
  87     return TRUE;
  88 }
  89
  90 #endif // wxUSE_TIMER
  91