Refactor wxEventLoopSource-related code.

Currently wxEventLoopSource can't be created directly and can only be used to
monitor file descriptors so reduce the API to just wxEventLoop::AddSourceForFD()
and remove AddSource(), RemoveSource() and RemoveAllSources() which couldn't
be implemented for all ports. This makes the code much simpler without any
loss of functionality.

Make wxEventLoopSource responsible for removing itself from the event loop
when it is deleted. This allows to remove IsOk() and Invalidate() methods
making the code simpler and gets rid of various sets/maps which were used
before.

This also allows to support event loop sources in Carbon as well: wxOSX/Carbon
now compiles and works with wxUSE_FSWATCHER==1.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62475 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/osx/cocoa/evtloop.h

@@ -11,11 +11,9 @@
 #ifndef _WX_OSX_COCOA_EVTLOOP_H_
 #define _WX_OSX_COCOA_EVTLOOP_H_
 
-class WXDLLIMPEXP_BASE wxGUIEventLoop : public wxEventLoopManual
+class WXDLLIMPEXP_BASE wxGUIEventLoop : public wxCFEventLoop
 {
 public:
-    typedef wxMacEventLoopSource Source;
-
     wxGUIEventLoop();
 
     // implement/override base class pure virtual
@@ -26,30 +24,8 @@ public:
     virtual void WakeUp();
     virtual bool YieldFor(long eventsToProcess);
 
-#if wxUSE_EVENTLOOP_SOURCE
-    virtual wxMacEventLoopSource* CreateSource() const
-    {
-        return new wxMacEventLoopSource();
-    }
-
-    virtual wxMacEventLoopSource* CreateSource(int res,
-                                           wxEventLoopSourceHandler* handler,
-                                           int flags) const;
-
-    virtual wxMacEventLoopSource* CreateSource(CFRunLoopSourceRef res,
-                                           wxEventLoopSourceHandler* handler,
-                                           int flags) const
-    {
-        return new wxMacEventLoopSource(res, handler, flags);
-    }
-#endif
-
 protected:
-#if wxUSE_EVENTLOOP_SOURCE
-    // adding/removing sources
-    virtual bool DoAddSource(wxAbstractEventLoopSource* source);
-    virtual bool DoRemoveSource(wxAbstractEventLoopSource* source);
-#endif
+    virtual CFRunLoopRef CFGetCurrentRunLoop() const;
 
 private:
     double m_sleepTime;