// Purpose: wxEventLoop implementation common to both Carbon and Cocoa
// Author: Vadim Zeitlin
// Created: 2009-10-18
-// RCS-ID: $Id: wxhead.cpp,v 1.10 2009-06-29 10:23:04 zeitlin Exp $
+// RCS-ID: $Id$
// Copyright: (c) 2009 Vadim Zeitlin <vadim@wxwidgets.org>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#if wxUSE_EVENTLOOP_SOURCE
+#ifndef WX_PRECOMP
+ #include "wx/log.h"
+ #include "wx/app.h"
+#endif
+
#include "wx/evtloopsrc.h"
#include "wx/scopedptr.h"
#include "wx/osx/private.h"
#include "wx/osx/core/cfref.h"
+#if wxUSE_GUI
+ #include "wx/nonownedwnd.h"
+#endif
+
// ============================================================================
// wxCFEventLoopSource and wxCFEventLoop implementation
// ============================================================================
#endif // MAC_OS_X_VERSION_MAX_ALLOWED
#endif // wxUSE_EVENTLOOP_SOURCE
+
+void wxObserverCallBack(CFRunLoopObserverRef observer, CFRunLoopActivity activity, void *info)
+{
+ wxCFEventLoop * eventloop = static_cast<wxCFEventLoop *>(info);
+ if ( eventloop )
+ eventloop->ObserverCallBack(observer, activity);
+}
+
+void wxCFEventLoop::ObserverCallBack(CFRunLoopObserverRef WXUNUSED(observer), int activity)
+{
+ if ( activity & kCFRunLoopBeforeTimers )
+ {
+ // process pending wx events first as they correspond to low-level events
+ // which happened before, i.e. typically pending events were queued by a
+ // previous call to Dispatch() and if we didn't process them now the next
+ // call to it might enqueue them again (as happens with e.g. socket events
+ // which would be generated as long as there is input available on socket
+ // and this input is only removed from it when pending event handlers are
+ // executed)
+
+ if ( wxTheApp )
+ wxTheApp->ProcessPendingEvents();
+ }
+
+ if ( activity & kCFRunLoopBeforeWaiting )
+ {
+ if ( ProcessIdle() )
+ {
+ WakeUp();
+ }
+ else
+ {
+#if wxUSE_THREADS
+ wxMutexGuiLeave();
+ wxMilliSleep(20);
+ wxMutexGuiEnter();
+#endif
+ }
+ }
+}
+
+wxCFEventLoop::wxCFEventLoop()
+{
+ m_shouldExit = false;
+
+ m_runLoop = CFGetCurrentRunLoop();
+
+ CFRunLoopObserverContext ctxt;
+ bzero( &ctxt, sizeof(ctxt) );
+ ctxt.info = this;
+ m_runLoopObserver = CFRunLoopObserverCreate( kCFAllocatorDefault, kCFRunLoopBeforeTimers | kCFRunLoopBeforeWaiting , true /* repeats */, 0,
+ wxObserverCallBack, &ctxt );
+ CFRunLoopAddObserver(m_runLoop, m_runLoopObserver, kCFRunLoopCommonModes);
+}
+
+wxCFEventLoop::~wxCFEventLoop()
+{
+ CFRunLoopRemoveObserver(m_runLoop, m_runLoopObserver, kCFRunLoopCommonModes);
+}
+
+
+CFRunLoopRef wxCFEventLoop::CFGetCurrentRunLoop() const
+{
+ return CFRunLoopGetCurrent();
+}
+
+void wxCFEventLoop::WakeUp()
+{
+ extern void wxMacWakeUp();
+
+ wxMacWakeUp();
+}
+
+bool wxCFEventLoop::YieldFor(long eventsToProcess)
+{
+#if wxUSE_THREADS
+ // Yielding from a non-gui thread needs to bail out, otherwise we end up
+ // possibly sending events in the thread too.
+ if ( !wxThread::IsMain() )
+ {
+ return true;
+ }
+#endif // wxUSE_THREADS
+
+ m_isInsideYield = true;
+ m_eventsToProcessInsideYield = eventsToProcess;
+
+#if wxUSE_LOG
+ // disable log flushing from here because a call to wxYield() shouldn't
+ // normally result in message boxes popping up &c
+ wxLog::Suspend();
+#endif // wxUSE_LOG
+
+ // process all pending events:
+ while ( DoProcessEvents() == 1 )
+ ;
+
+ // it's necessary to call ProcessIdle() to update the frames sizes which
+ // might have been changed (it also will update other things set from
+ // OnUpdateUI() which is a nice (and desired) side effect)
+ while ( ProcessIdle() ) {}
+
+ // if there are pending events, we must process them.
+ if (wxTheApp)
+ wxTheApp->ProcessPendingEvents();
+
+#if wxUSE_LOG
+ wxLog::Resume();
+#endif // wxUSE_LOG
+ m_isInsideYield = false;
+
+ return true;
+}
+
+// implement/override base class pure virtual
+bool wxCFEventLoop::Pending() const
+{
+ return true;
+}
+
+int wxCFEventLoop::DoProcessEvents()
+{
+ return DispatchTimeout( 1000 );
+}
+
+bool wxCFEventLoop::Dispatch()
+{
+ return DoProcessEvents() != 0;
+}
+
+int wxCFEventLoop::DispatchTimeout(unsigned long timeout)
+{
+ if ( !wxTheApp )
+ return 0;
+
+ int status = DoDispatchTimeout(timeout);
+
+ switch( status )
+ {
+ case 0:
+ break;
+ case -1:
+ if ( m_shouldExit )
+ return 0;
+
+ break;
+ case 1:
+ break;
+ }
+
+ return status;
+}
+
+int wxCFEventLoop::DoDispatchTimeout(unsigned long timeout)
+{
+ SInt32 status = CFRunLoopRunInMode(kCFRunLoopDefaultMode, timeout / 1000.0 , true);
+ switch( status )
+ {
+ case kCFRunLoopRunFinished:
+ wxFAIL_MSG( "incorrect run loop state" );
+ break;
+ case kCFRunLoopRunStopped:
+ return 0;
+ break;
+ case kCFRunLoopRunTimedOut:
+ return -1;
+ break;
+ case kCFRunLoopRunHandledSource:
+ default:
+ break;
+ }
+ return 1;
+}
+
+void wxCFEventLoop::DoRun()
+{
+ for ( ;; )
+ {
+ // generate and process idle events for as long as we don't
+ // have anything else to do
+ DoProcessEvents();
+
+ // if the "should exit" flag is set, the loop should terminate
+ // but not before processing any remaining messages so while
+ // Pending() returns true, do process them
+ if ( m_shouldExit )
+ {
+ while ( DoProcessEvents() == 1 )
+ ;
+
+ break;
+ }
+ }
+}
+
+void wxCFEventLoop::DoStop()
+{
+ CFRunLoopStop(CFGetCurrentRunLoop());
+}
+
+// enters a loop calling OnNextIteration(), Pending() and Dispatch() and
+// terminating when Exit() is called
+int wxCFEventLoop::Run()
+{
+ // event loops are not recursive, you need to create another loop!
+ wxCHECK_MSG( !IsRunning(), -1, wxT("can't reenter a message loop") );
+
+ // ProcessIdle() and ProcessEvents() below may throw so the code here should
+ // be exception-safe, hence we must use local objects for all actions we
+ // should undo
+ wxEventLoopActivator activate(this);
+
+ // we must ensure that OnExit() is called even if an exception is thrown
+ // from inside ProcessEvents() but we must call it from Exit() in normal
+ // situations because it is supposed to be called synchronously,
+ // wxModalEventLoop depends on this (so we can't just use ON_BLOCK_EXIT or
+ // something similar here)
+#if wxUSE_EXCEPTIONS
+ for ( ;; )
+ {
+ try
+ {
+#endif // wxUSE_EXCEPTIONS
+
+ DoRun();
+
+#if wxUSE_EXCEPTIONS
+ // exit the outer loop as well
+ break;
+ }
+ catch ( ... )
+ {
+ try
+ {
+ if ( !wxTheApp || !wxTheApp->OnExceptionInMainLoop() )
+ {
+ OnExit();
+ break;
+ }
+ //else: continue running the event loop
+ }
+ catch ( ... )
+ {
+ // OnException() throwed, possibly rethrowing the same
+ // exception again: very good, but we still need OnExit() to
+ // be called
+ OnExit();
+ throw;
+ }
+ }
+ }
+#endif // wxUSE_EXCEPTIONS
+
+ return m_exitcode;
+}
+
+// sets the "should exit" flag and wakes up the loop so that it terminates
+// soon
+void wxCFEventLoop::Exit(int rc)
+{
+ m_exitcode = rc;
+ m_shouldExit = true;
+ DoStop();
+}
projects / wxWidgets.git / blobdiff