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
   9 // Licence:     wxWindows licence
  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 // should probably be in wx/msw/private.h
  57 #ifdef __WXMICROWIN__
  58     #define MakeProcInstance(proc, hinst) proc
  59 #endif
  60
  61 IMPLEMENT_ABSTRACT_CLASS(wxTimer, wxObject)
  62
  63 // ============================================================================
  64 // implementation
  65 // ============================================================================
  66
  67 // ----------------------------------------------------------------------------
  68 // wxTimer class
  69 // ----------------------------------------------------------------------------
  70
  71 void wxTimer::Init()
  72 {
  73     m_id = 0;
  74 }
  75
  76 wxTimer::~wxTimer()
  77 {
  78     wxTimer::Stop();
  79
  80     wxTimerList.DeleteObject(this);
  81 }
  82
  83 bool wxTimer::Start(int milliseconds, bool oneShot)
  84 {
  85     (void)wxTimerBase::Start(milliseconds, oneShot);
  86
  87     wxCHECK_MSG( m_milli > 0, false, wxT("invalid value for timer timeour") );
  88
  89     TIMERPROC wxTimerProcInst = (TIMERPROC)
  90         MakeProcInstance((FARPROC)wxTimerProc, wxGetInstance());
  91
  92     m_id = ::SetTimer(NULL, (UINT)(m_id ? m_id : 1),
  93                       (UINT)m_milli, wxTimerProcInst);
  94
  95     if ( m_id > 0 )
  96     {
  97         wxTimerList.Append(m_id, this);
  98
  99         return true;
 100     }
 101     else
 102     {
 103         wxLogSysError(_("Couldn't create a timer"));
 104
 105         return false;
 106     }
 107 }
 108
 109 void wxTimer::Stop()
 110 {
 111     if ( m_id )
 112     {
 113         ::KillTimer(NULL, (UINT)m_id);
 114
 115         wxTimerList.DeleteObject(this);
 116     }
 117
 118     m_id = 0;
 119 }
 120
 121 // ----------------------------------------------------------------------------
 122 // private functions
 123 // ----------------------------------------------------------------------------
 124
 125 void wxProcessTimer(wxTimer& timer)
 126 {
 127     // Avoid to process spurious timer events
 128     if ( timer.m_id == 0)
 129         return;
 130
 131     if ( timer.IsOneShot() )
 132         timer.Stop();
 133
 134     timer.Notify();
 135 }
 136
 137 UINT WINAPI _EXPORT wxTimerProc(HWND WXUNUSED(hwnd), WORD, int idTimer, DWORD)
 138 {
 139     wxNode *node = wxTimerList.Find((long)idTimer);
 140
 141     wxCHECK_MSG( node, 0, wxT("bogus timer id in wxTimerProc") );
 142
 143     wxProcessTimer(*(wxTimer *)node->GetData());
 144
 145     return 0;
 146 }
 147
 148 #endif // wxUSE_TIMER