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 #ifndef WX_PRECOMP
  24     #include "wx/setup.h"
  25     #include "wx/window.h"
  26     #include "wx/list.h"
  27     #include "wx/event.h"
  28     #include "wx/app.h"
  29     #include "wx/intl.h"
  30     #include "wx/log.h"
  31 #endif
  32
  33 #include "wx/timer.h"
  34
  35 #include "wx/msw/private.h"
  36
  37 // ----------------------------------------------------------------------------
  38 // private functions
  39 // ----------------------------------------------------------------------------
  40
  41 wxList wxTimerList(wxKEY_INTEGER);
  42 UINT WINAPI _EXPORT wxTimerProc(HWND hwnd, WORD, int idTimer, DWORD);
  43
  44 // ----------------------------------------------------------------------------
  45 // macros
  46 // ----------------------------------------------------------------------------
  47
  48 #ifdef __WIN32__
  49     #define _EXPORT
  50 #else
  51     #define _EXPORT _export
  52 #endif
  53
  54 IMPLEMENT_ABSTRACT_CLASS(wxTimer, wxObject)
  55
  56 // ============================================================================
  57 // implementation
  58 // ============================================================================
  59
  60 // ----------------------------------------------------------------------------
  61 // wxTimer class
  62 // ----------------------------------------------------------------------------
  63
  64 void wxTimer::Init()
  65 {
  66     m_id = 0;
  67 }
  68
  69 wxTimer::~wxTimer()
  70 {
  71     wxTimer::Stop();
  72
  73     wxTimerList.DeleteObject(this);
  74 }
  75
  76 bool wxTimer::Start(int milliseconds, bool oneShot)
  77 {
  78     (void)wxTimerBase::Start(milliseconds, oneShot);
  79
  80     wxCHECK_MSG( m_milli > 0, FALSE, wxT("invalid value for timer timeour") );
  81
  82     wxTimerList.DeleteObject(this);
  83     TIMERPROC wxTimerProcInst = (TIMERPROC)
  84         MakeProcInstance((FARPROC)wxTimerProc, wxGetInstance());
  85
  86     m_id = SetTimer(NULL, (UINT)(m_id ? m_id : 1),
  87                     (UINT)milliseconds, wxTimerProcInst);
  88     if ( m_id > 0 )
  89     {
  90         wxTimerList.Append(m_id, this);
  91
  92         return TRUE;
  93     }
  94     else
  95     {
  96         wxLogSysError(_("Couldn't create a timer"));
  97
  98         return FALSE;
  99     }
 100 }
 101
 102 void wxTimer::Stop()
 103 {
 104     if ( m_id )
 105     {
 106         KillTimer(NULL, (UINT)m_id);
 107         wxTimerList.DeleteObject(this);
 108     }
 109
 110     m_id = 0;
 111 }
 112
 113 // ----------------------------------------------------------------------------
 114 // private functions
 115 // ----------------------------------------------------------------------------
 116
 117 void wxProcessTimer(wxTimer& timer)
 118 {
 119     // Avoid to process spurious timer events
 120     if ( timer.m_id == 0)
 121         return;
 122
 123     if ( timer.IsOneShot() )
 124         timer.Stop();
 125
 126     timer.Notify();
 127 }
 128
 129 UINT WINAPI _EXPORT wxTimerProc(HWND WXUNUSED(hwnd), WORD, int idTimer, DWORD)
 130 {
 131     wxNode *node = wxTimerList.Find((long)idTimer);
 132
 133     wxCHECK_MSG( node, 0, wxT("bogus timer id in wxTimerProc") );
 134
 135     wxProcessTimer(*(wxTimer *)node->Data());
 136
 137     return 0;
 138 }