src/osx/carbon/evtloop.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/carbon/evtloop.cpp
   3 // Purpose:     implementation of wxEventLoop for wxMac
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     2006-01-12
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2006 Vadim Zeitlin <vadim@wxwindows.org>
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // for compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #include "wx/evtloop.h"
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/app.h"
  31 #endif // WX_PRECOMP
  32
  33 #include "wx/osx/private.h"
  34
  35 // ============================================================================
  36 // wxEventLoop implementation
  37 // ============================================================================
  38
  39 wxGUIEventLoop::wxGUIEventLoop()
  40 {
  41     m_sleepTime = kEventDurationNoWait;
  42 }
  43
  44 void wxGUIEventLoop::WakeUp()
  45 {
  46     extern void wxMacWakeUp();
  47
  48     wxMacWakeUp();
  49 }
  50
  51 bool wxGUIEventLoop::Pending() const
  52 {
  53     EventRef theEvent;
  54
  55     return ReceiveNextEvent
  56            (
  57             0,          // we want any event at all so we don't specify neither
  58             NULL,       // the number of event types nor the types themselves
  59             kEventDurationNoWait,
  60             false,      // don't remove the event from queue
  61             &theEvent
  62            ) == noErr;
  63 }
  64
  65 bool wxGUIEventLoop::Dispatch()
  66 {
  67     if ( !wxTheApp )
  68         return false;
  69
  70     wxMacAutoreleasePool autoreleasepool;
  71
  72     EventRef theEvent;
  73
  74     OSStatus status = ReceiveNextEvent(0, NULL, m_sleepTime, true, &theEvent) ;
  75
  76     switch (status)
  77     {
  78         case eventLoopTimedOutErr :
  79             if ( wxTheApp->ProcessIdle() )
  80                 m_sleepTime = kEventDurationNoWait ;
  81             else
  82             {
  83                 m_sleepTime = kEventDurationSecond;
  84 #if wxUSE_THREADS
  85                 wxMutexGuiLeave();
  86                 wxMilliSleep(20);
  87                 wxMutexGuiEnter();
  88 #endif
  89             }
  90             break;
  91
  92         case eventLoopQuitErr :
  93             // according to QA1061 this may also occur
  94             // when a WakeUp Process is executed
  95             break;
  96
  97         default:
  98             if ( wxTheApp )
  99                 wxTheApp->MacSetCurrentEvent( theEvent, NULL );
 100
 101             OSStatus status = SendEventToEventTarget(theEvent, GetEventDispatcherTarget());
 102             if (status == eventNotHandledErr && wxTheApp)
 103                 wxTheApp->MacHandleUnhandledEvent(theEvent);
 104
 105             ReleaseEvent( theEvent );
 106             m_sleepTime = kEventDurationNoWait ;
 107             break;
 108     }
 109
 110     return true;
 111 }