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 // Copyright:   (c) 2006 Vadim Zeitlin <vadim@wxwindows.org>
   8 // Licence:     wxWindows licence
   9 ///////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // declarations
  13 // ============================================================================
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 // for compilers that support precompilation, includes "wx.h".
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #include "wx/evtloop.h"
  27
  28 #ifndef WX_PRECOMP
  29     #include "wx/app.h"
  30     #include "wx/log.h"
  31 #endif // WX_PRECOMP
  32
  33 #if wxUSE_GUI
  34 #include "wx/nonownedwnd.h"
  35 #endif
  36
  37 #include "wx/osx/private.h"
  38
  39 // ============================================================================
  40 // wxEventLoop implementation
  41 // ============================================================================
  42
  43 wxGUIEventLoop::wxGUIEventLoop()
  44 {
  45 }
  46
  47 static void DispatchAndReleaseEvent(EventRef theEvent)
  48 {
  49     if ( wxTheApp )
  50         wxTheApp->MacSetCurrentEvent( theEvent, NULL );
  51
  52     OSStatus status = SendEventToEventTarget(theEvent, GetEventDispatcherTarget());
  53     if (status == eventNotHandledErr && wxTheApp)
  54         wxTheApp->MacHandleUnhandledEvent(theEvent);
  55
  56     ReleaseEvent( theEvent );
  57 }
  58
  59 int wxGUIEventLoop::DoDispatchTimeout(unsigned long timeout)
  60 {
  61     wxMacAutoreleasePool autoreleasepool;
  62
  63     EventRef event;
  64     OSStatus status = ReceiveNextEvent(0, NULL, timeout/1000, true, &event);
  65     switch ( status )
  66     {
  67         default:
  68             wxFAIL_MSG( "unexpected ReceiveNextEvent() error" );
  69             // fall through
  70
  71         case eventLoopTimedOutErr:
  72             return -1;
  73
  74         case eventLoopQuitErr:
  75             // according to QA1061 this may also occur
  76             // when a WakeUp Process is executed
  77             return 0;
  78
  79         case noErr:
  80             DispatchAndReleaseEvent(event);
  81             return 1;
  82     }
  83 }
  84
  85 void wxGUIEventLoop::WakeUp()
  86 {
  87     OSStatus err = noErr;
  88     wxMacCarbonEvent wakeupEvent;
  89     wakeupEvent.Create( 'WXMC', 'WXMC', GetCurrentEventTime(),
  90                         kEventAttributeNone );
  91     err = PostEventToQueue(GetMainEventQueue(), wakeupEvent,
  92                             kEventPriorityHigh );
  93 }
  94
  95 void wxGUIEventLoop::OSXDoRun()
  96 {
  97     wxMacAutoreleasePool autoreleasepool;
  98
  99     while (!m_shouldExit)
 100     {
 101         RunApplicationEventLoop();
 102     }
 103
 104     // Force enclosing event loop to temporarily exit and check
 105     // if it should be stopped.
 106     QuitApplicationEventLoop();
 107 }
 108
 109 void wxGUIEventLoop::OSXDoStop()
 110 {
 111     QuitApplicationEventLoop();
 112 }
 113
 114 CFRunLoopRef wxGUIEventLoop::CFGetCurrentRunLoop() const
 115 {
 116     return wxCFEventLoop::CFGetCurrentRunLoop();
 117 }
 118
 119 // TODO move into a evtloop_osx.cpp
 120
 121 wxModalEventLoop::wxModalEventLoop(wxWindow *modalWindow)
 122 {
 123     m_modalWindow = wxDynamicCast(modalWindow, wxNonOwnedWindow);
 124     wxASSERT_MSG( m_modalWindow != NULL, "must pass in a toplevel window for modal event loop" );
 125     m_modalNativeWindow = m_modalWindow->GetWXWindow();
 126 }
 127
 128 wxModalEventLoop::wxModalEventLoop(WXWindow modalNativeWindow)
 129 {
 130     m_modalWindow = NULL;
 131     wxASSERT_MSG( modalNativeWindow != NULL, "must pass in a toplevel window for modal event loop" );
 132     m_modalNativeWindow = modalNativeWindow;
 133 }
 134
 135 // END move into a evtloop_osx.cpp
 136
 137 void wxModalEventLoop::OSXDoRun()
 138 {
 139     wxWindowDisabler disabler(m_modalWindow);
 140     wxMacAutoreleasePool autoreleasepool;
 141
 142     bool resetGroupParent = false;
 143
 144     WindowGroupRef windowGroup = NULL;
 145     WindowGroupRef formerParentGroup = NULL;
 146
 147     // make sure modal dialogs are in the right layer so that they are not covered
 148     if ( m_modalWindow != NULL )
 149     {
 150         if ( m_modalWindow->GetParent() == NULL )
 151         {
 152             windowGroup = GetWindowGroup(m_modalNativeWindow) ;
 153             if ( windowGroup != GetWindowGroupOfClass( kMovableModalWindowClass ) )
 154             {
 155                 formerParentGroup = GetWindowGroupParent( windowGroup );
 156                 SetWindowGroupParent( windowGroup, GetWindowGroupOfClass( kMovableModalWindowClass ) );
 157                 resetGroupParent = true;
 158             }
 159         }
 160     }
 161
 162     m_modalWindow->SetFocus();
 163
 164     RunAppModalLoopForWindow(m_modalNativeWindow);
 165
 166     if ( resetGroupParent )
 167     {
 168         SetWindowGroupParent( windowGroup , formerParentGroup );
 169     }
 170
 171 }
 172
 173 void wxModalEventLoop::OSXDoStop()
 174 {
 175     wxMacAutoreleasePool autoreleasepool;
 176     QuitAppModalLoopForWindow(m_modalNativeWindow);
 177 }
 178
 179