src/msw/timer.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        timer.cpp
   3 // Purpose:     wxTimer implementation
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13     #pragma implementation "timer.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20     #pragma hdrstop
  21 #endif
  22
  23 #if wxUSE_TIMER
  24
  25 #ifndef WX_PRECOMP
  26     #include "wx/setup.h"
  27     #include "wx/window.h"
  28     #include "wx/list.h"
  29     #include "wx/event.h"
  30     #include "wx/app.h"
  31     #include "wx/intl.h"
  32     #include "wx/log.h"
  33 #endif
  34
  35 #include "wx/timer.h"
  36
  37 #include "wx/msw/private.h"
  38
  39 // ----------------------------------------------------------------------------
  40 // private functions
  41 // ----------------------------------------------------------------------------
  42
  43 wxList wxTimerList(wxKEY_INTEGER);
  44 UINT WINAPI _EXPORT wxTimerProc(HWND hwnd, WORD, int idTimer, DWORD);
  45
  46 // ----------------------------------------------------------------------------
  47 // macros
  48 // ----------------------------------------------------------------------------
  49
  50 #ifdef __WIN32__
  51     #define _EXPORT
  52 #else
  53     #define _EXPORT _export
  54 #endif
  55
  56 IMPLEMENT_ABSTRACT_CLASS(wxTimer, wxObject)
  57
  58 // ============================================================================
  59 // implementation
  60 // ============================================================================
  61
  62 // ----------------------------------------------------------------------------
  63 // wxTimer class
  64 // ----------------------------------------------------------------------------
  65
  66 void wxTimer::Init()
  67 {
  68     m_id = 0;
  69 }
  70
  71 wxTimer::~wxTimer()
  72 {
  73     wxTimer::Stop();
  74
  75     wxTimerList.DeleteObject(this);
  76 }
  77
  78 bool wxTimer::Start(int milliseconds, bool oneShot)
  79 {
  80     (void)wxTimerBase::Start(milliseconds, oneShot);
  81
  82     wxCHECK_MSG( m_milli > 0, FALSE, wxT("invalid value for timer timeour") );
  83
  84     wxTimerList.DeleteObject(this);
  85     TIMERPROC wxTimerProcInst = (TIMERPROC)
  86         MakeProcInstance((FARPROC)wxTimerProc, wxGetInstance());
  87
  88     m_id = SetTimer(NULL, (UINT)(m_id ? m_id : 1),
  89                     (UINT)milliseconds, wxTimerProcInst);
  90     if ( m_id > 0 )
  91     {
  92         wxTimerList.Append(m_id, this);
  93
  94         return TRUE;
  95     }
  96     else
  97     {
  98         wxLogSysError(_("Couldn't create a timer"));
  99
 100         return FALSE;
 101     }
 102 }
 103
 104 void wxTimer::Stop()
 105 {
 106     if ( m_id )
 107     {
 108         KillTimer(NULL, (UINT)m_id);
 109         wxTimerList.DeleteObject(this);
 110     }
 111
 112     m_id = 0;
 113 }
 114
 115 // ----------------------------------------------------------------------------
 116 // private functions
 117 // ----------------------------------------------------------------------------
 118
 119 void wxProcessTimer(wxTimer& timer)
 120 {
 121     // Avoid to process spurious timer events
 122     if ( timer.m_id == 0)
 123         return;
 124
 125     if ( timer.IsOneShot() )
 126         timer.Stop();
 127
 128     timer.Notify();
 129 }
 130
 131 UINT WINAPI _EXPORT wxTimerProc(HWND WXUNUSED(hwnd), WORD, int idTimer, DWORD)
 132 {
 133     wxNode *node = wxTimerList.Find((long)idTimer);
 134
 135     wxCHECK_MSG( node, 0, wxT("bogus timer id in wxTimerProc") );
 136
 137     wxProcessTimer(*(wxTimer *)node->Data());
 138
 139     return 0;
 140 }
 141
 142 #endif // wxUSE_TIMER