text: /////////////////////////////////////////////////////////////////////////////
  // Name:        src/common/timerimpl.cpp
  // Purpose:     wxTimerBase implementation
  // Author:      Julian Smart, Guillermo Rodriguez, Vadim Zeitlin
  // Modified by: VZ: extracted all non-wxTimer stuff in stopwatch.cpp (20.06.03)
  // Created:     04/01/98
  // Copyright:   (c) Julian Smart
  //              (c) 1999 Guillermo Rodriguez <guille@iies.es>
  // Licence:     wxWindows licence
  /////////////////////////////////////////////////////////////////////////////
  
  // ============================================================================
  // declarations
  // ============================================================================
  
  // ----------------------------------------------------------------------------
  // wxWin headers
  // ----------------------------------------------------------------------------
  
  // For compilers that support precompilation, includes "wx.h".
  #include "wx/wxprec.h"
  
  #ifdef __BORLANDC__
      #pragma hdrstop
  #endif
  
  #if wxUSE_TIMER
  
  #include "wx/private/timer.h"
  #include "wx/utils.h"               // for wxNewId()
  #include "wx/thread.h"
  
  wxTimerImpl::wxTimerImpl(wxTimer *timer)
  {
      m_timer = timer;
      m_owner = NULL;
      m_idTimer = wxID_ANY;
      m_milli = 0;
      m_oneShot = false;
  }
  
  void wxTimerImpl::SetOwner(wxEvtHandler *owner, int timerid)
  {
      m_owner = owner;
      m_idTimer = timerid == wxID_ANY ? wxNewId() : timerid;
  }
  
  void wxTimerImpl::SendEvent()
  {
      wxTimerEvent event(*m_timer);
      (void)m_owner->SafelyProcessEvent(event);
  }
  
  bool wxTimerImpl::Start(int milliseconds, bool oneShot)
  {
      // under MSW timers only work when they're started from the main thread so
      // let the caller know about it
  #if wxUSE_THREADS
      wxASSERT_MSG( wxThread::IsMain(),
                    wxT("timer can only be started from the main thread") );
  #endif // wxUSE_THREADS
  
      if ( IsRunning() )
      {
          // not stopping the already running timer might work for some
          // platforms (no problems under MSW) but leads to mysterious crashes
          // on the others (GTK), so to be on the safe side do it here
          Stop();
      }
  
      if ( milliseconds != -1 )
      {
          m_milli = milliseconds;
      }
  
      m_oneShot = oneShot;
  
      return true;
  }
  
  
  #endif // wxUSE_TIMER
  
  