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     #include "wx/log.h"
  32 #endif // WX_PRECOMP
  33
  34 #include "wx/osx/private.h"
  35
  36 // ============================================================================
  37 // wxEventLoop implementation
  38 // ============================================================================
  39
  40 wxGUIEventLoop::wxGUIEventLoop()
  41 {
  42 }
  43
  44 static void DispatchAndReleaseEvent(EventRef theEvent)
  45 {
  46     if ( wxTheApp )
  47         wxTheApp->MacSetCurrentEvent( theEvent, NULL );
  48
  49     OSStatus status = SendEventToEventTarget(theEvent, GetEventDispatcherTarget());
  50     if (status == eventNotHandledErr && wxTheApp)
  51         wxTheApp->MacHandleUnhandledEvent(theEvent);
  52
  53     ReleaseEvent( theEvent );
  54 }
  55
  56 int wxGUIEventLoop::DoDispatchTimeout(unsigned long timeout)
  57 {
  58     EventRef event;
  59     OSStatus status = ReceiveNextEvent(0, NULL, timeout/1000, true, &event);
  60     switch ( status )
  61     {
  62         default:
  63             wxFAIL_MSG( "unexpected ReceiveNextEvent() error" );
  64             // fall through
  65
  66         case eventLoopTimedOutErr:
  67             return -1;
  68
  69         case eventLoopQuitErr:
  70             // according to QA1061 this may also occur
  71             // when a WakeUp Process is executed
  72             return 0;
  73
  74         case noErr:
  75             DispatchAndReleaseEvent(event);
  76             return 1;
  77     }
  78 }