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 #if wxUSE_GUI
  35 #include "wx/nonownedwnd.h"
  36 #endif
  37
  38 #include "wx/osx/private.h"
  39
  40 // ============================================================================
  41 // wxEventLoop implementation
  42 // ============================================================================
  43
  44 wxGUIEventLoop::wxGUIEventLoop()
  45 {
  46 }
  47
  48 static void DispatchAndReleaseEvent(EventRef theEvent)
  49 {
  50     if ( wxTheApp )
  51         wxTheApp->MacSetCurrentEvent( theEvent, NULL );
  52
  53     OSStatus status = SendEventToEventTarget(theEvent, GetEventDispatcherTarget());
  54     if (status == eventNotHandledErr && wxTheApp)
  55         wxTheApp->MacHandleUnhandledEvent(theEvent);
  56
  57     ReleaseEvent( theEvent );
  58 }
  59
  60 int wxGUIEventLoop::DoDispatchTimeout(unsigned long timeout)
  61 {
  62     wxMacAutoreleasePool autoreleasepool;
  63
  64     EventRef event;
  65     OSStatus status = ReceiveNextEvent(0, NULL, timeout/1000, true, &event);
  66     switch ( status )
  67     {
  68         default:
  69             wxFAIL_MSG( "unexpected ReceiveNextEvent() error" );
  70             // fall through
  71
  72         case eventLoopTimedOutErr:
  73             return -1;
  74
  75         case eventLoopQuitErr:
  76             // according to QA1061 this may also occur
  77             // when a WakeUp Process is executed
  78             return 0;
  79
  80         case noErr:
  81             DispatchAndReleaseEvent(event);
  82             return 1;
  83     }
  84 }
  85
  86 void wxGUIEventLoop::WakeUp()
  87 {
  88     OSStatus err = noErr;
  89     wxMacCarbonEvent wakeupEvent;
  90     wakeupEvent.Create( 'WXMC', 'WXMC', GetCurrentEventTime(),
  91                         kEventAttributeNone );
  92     err = PostEventToQueue(GetMainEventQueue(), wakeupEvent,
  93                             kEventPriorityHigh );
  94 }
  95
  96 void wxGUIEventLoop::OSXDoRun()
  97 {
  98     wxMacAutoreleasePool autoreleasepool;
  99
 100     while (!m_shouldExit)
 101     {
 102         RunApplicationEventLoop();
 103     }
 104
 105     // Force enclosing event loop to temporarily exit and check
 106     // if it should be stopped.
 107     QuitApplicationEventLoop();
 108 }
 109
 110 void wxGUIEventLoop::OSXDoStop()
 111 {
 112     QuitApplicationEventLoop();
 113 }
 114
 115 CFRunLoopRef wxGUIEventLoop::CFGetCurrentRunLoop() const
 116 {
 117     return wxCFEventLoop::CFGetCurrentRunLoop();
 118 }
 119
 120 // TODO move into a evtloop_osx.cpp
 121
 122 wxModalEventLoop::wxModalEventLoop(wxWindow *modalWindow)
 123 {
 124     m_modalWindow = wxDynamicCast(modalWindow, wxNonOwnedWindow);
 125     wxASSERT_MSG( m_modalWindow != NULL, "must pass in a toplevel window for modal event loop" );
 126     m_modalNativeWindow = m_modalWindow->GetWXWindow();
 127 }
 128
 129 wxModalEventLoop::wxModalEventLoop(WXWindow modalNativeWindow)
 130 {
 131     m_modalWindow = NULL;
 132     wxASSERT_MSG( modalNativeWindow != NULL, "must pass in a toplevel window for modal event loop" );
 133     m_modalNativeWindow = modalNativeWindow;
 134 }
 135
 136 // END move into a evtloop_osx.cpp
 137
 138 void wxModalEventLoop::OSXDoRun()
 139 {
 140     wxWindowDisabler disabler(m_modalWindow);
 141     wxMacAutoreleasePool autoreleasepool;
 142
 143     bool resetGroupParent = false;
 144
 145     WindowGroupRef windowGroup = NULL;
 146     WindowGroupRef formerParentGroup = NULL;
 147
 148     // make sure modal dialogs are in the right layer so that they are not covered
 149     if ( m_modalWindow != NULL )
 150     {
 151         if ( m_modalWindow->GetParent() == NULL )
 152         {
 153             windowGroup = GetWindowGroup(m_modalNativeWindow) ;
 154             if ( windowGroup != GetWindowGroupOfClass( kMovableModalWindowClass ) )
 155             {
 156                 formerParentGroup = GetWindowGroupParent( windowGroup );
 157                 SetWindowGroupParent( windowGroup, GetWindowGroupOfClass( kMovableModalWindowClass ) );
 158                 resetGroupParent = true;
 159             }
 160         }
 161     }
 162
 163     m_modalWindow->SetFocus();
 164
 165     RunAppModalLoopForWindow(m_modalNativeWindow);
 166
 167     if ( resetGroupParent )
 168     {
 169         SetWindowGroupParent( windowGroup , formerParentGroup );
 170     }
 171
 172 }
 173
 174 void wxModalEventLoop::OSXDoStop()
 175 {
 176     wxMacAutoreleasePool autoreleasepool;
 177     QuitAppModalLoopForWindow(m_modalNativeWindow);
 178 }
 179
 180