offer suppression of idle processing (delayed destruction happened too early eg when showing native message boxes)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71778 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/osx/evtloop.h

@@ -17,8 +17,11 @@
 DECLARE_WXOSX_OPAQUE_CFREF( CFRunLoop );
 DECLARE_WXOSX_OPAQUE_CFREF( CFRunLoopObserver );
 
+class WXDLLIMPEXP_BASE wxCFEventLoopPauseObservers;
+
 class WXDLLIMPEXP_BASE wxCFEventLoop : public wxEventLoopBase
 {
+    friend class wxCFEventLoopPauseObservers;
 public:
     wxCFEventLoop();
     virtual ~wxCFEventLoop();
@@ -53,11 +56,13 @@ public:
       AddSourceForFD(int fd, wxEventLoopSourceHandler *handler, int flags);
 #endif // wxUSE_EVENTLOOP_SOURCE
 
-
 protected:
     void CommonModeObserverCallBack(CFRunLoopObserverRef observer, int activity);
     void DefaultModeObserverCallBack(CFRunLoopObserverRef observer, int activity);
 
+    // set to false to avoid idling at unexpected moments - eg when having native message boxes
+    void SetProcessIdleEvents(bool process) { m_processIdleEvents = process; }
+
     static void OSXCommonModeObserverCallBack(CFRunLoopObserverRef observer, int activity, void *info);
     static void OSXDefaultModeObserverCallBack(CFRunLoopObserverRef observer, int activity, void *info);
 
@@ -84,6 +89,9 @@ protected:
 
     // default mode runloop observer
     CFRunLoopObserverRef m_defaultModeRunLoopObserver;
+    
+    // set to false to avoid idling at unexpected moments - eg when having native message boxes
+    bool m_processIdleEvents;
 
 private:
     // process all already pending events and dispatch a new one (blocking
@@ -91,6 +99,15 @@ private:
     //
     // returns the return value of DoDispatchTimeout()
     int DoProcessEvents();
+
+    wxDECLARE_NO_COPY_CLASS(wxCFEventLoop);
+};
+
+class WXDLLIMPEXP_BASE wxCFEventLoopPauseObservers : public wxObject
+{
+public:
+    wxCFEventLoopPauseObservers();
+    virtual ~wxCFEventLoopPauseObservers();
 };
 
 #if wxUSE_GUI

src/osx/core/evtloop_cf.cpp

@@ -169,7 +169,7 @@ void wxCFEventLoop::CommonModeObserverCallBack(CFRunLoopObserverRef WXUNUSED(obs
 
     if ( activity & kCFRunLoopBeforeWaiting )
     {
-        if ( ProcessIdle() )
+        if ( m_processIdleEvents && ProcessIdle() )
         {
             WakeUp();
         }
@@ -201,6 +201,7 @@ wxCFEventLoop::DefaultModeObserverCallBack(CFRunLoopObserverRef WXUNUSED(observe
 wxCFEventLoop::wxCFEventLoop()
 {
     m_shouldExit = false;
+    m_processIdleEvents = true;
 
     m_runLoop = CFGetCurrentRunLoop();
 
@@ -210,18 +211,19 @@ wxCFEventLoop::wxCFEventLoop()
     m_commonModeRunLoopObserver = CFRunLoopObserverCreate( kCFAllocatorDefault, kCFRunLoopBeforeTimers | kCFRunLoopBeforeWaiting , true /* repeats */, 0,
                                                           (CFRunLoopObserverCallBack) wxCFEventLoop::OSXCommonModeObserverCallBack, &ctxt );
     CFRunLoopAddObserver(m_runLoop, m_commonModeRunLoopObserver, kCFRunLoopCommonModes);
-    CFRelease(m_commonModeRunLoopObserver);
 
     m_defaultModeRunLoopObserver = CFRunLoopObserverCreate( kCFAllocatorDefault, kCFRunLoopBeforeTimers | kCFRunLoopBeforeWaiting , true /* repeats */, 0,
                                                            (CFRunLoopObserverCallBack) wxCFEventLoop::OSXDefaultModeObserverCallBack, &ctxt );
     CFRunLoopAddObserver(m_runLoop, m_defaultModeRunLoopObserver, kCFRunLoopDefaultMode);
-    CFRelease(m_defaultModeRunLoopObserver);
 }
 
 wxCFEventLoop::~wxCFEventLoop()
 {
     CFRunLoopRemoveObserver(m_runLoop, m_commonModeRunLoopObserver, kCFRunLoopCommonModes);
     CFRunLoopRemoveObserver(m_runLoop, m_defaultModeRunLoopObserver, kCFRunLoopDefaultMode);
+
+    CFRelease(m_defaultModeRunLoopObserver);
+    CFRelease(m_commonModeRunLoopObserver);
 }
 
 
@@ -439,6 +441,20 @@ void wxCFEventLoop::Exit(int rc)
     DoStop();
 }
 
+wxCFEventLoopPauseObservers::wxCFEventLoopPauseObservers()
+{
+    wxCFEventLoop* cfl = dynamic_cast<wxCFEventLoop*>(wxEventLoopBase::GetActive());
+    if ( cfl )
+        cfl->SetProcessIdleEvents(false);
+}
+
+wxCFEventLoopPauseObservers::~wxCFEventLoopPauseObservers()
+{
+    wxCFEventLoop* cfl = dynamic_cast<wxCFEventLoop*>(wxEventLoopBase::GetActive());
+    if ( cfl )
+        cfl->SetProcessIdleEvents(true);
+}
+
 // TODO Move to thread_osx.cpp
 
 #if wxUSE_THREADS