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