changed AddPendingEvent() to take const wxEvent reference, it doesn't need to modify it

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@46600 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/evthand.tex

@@ -40,7 +40,7 @@ each other.
 
 \membersection{wxEvtHandler::AddPendingEvent}\label{wxevthandleraddpendingevent}
 
-\func{virtual void}{AddPendingEvent}{\param{wxEvent\& }{event}}
+\func{virtual void}{AddPendingEvent}{\param{const wxEvent\& }{event}}
 
 This function posts an event to be processed later.
 

include/wx/event.h

@@ -2337,12 +2337,12 @@ public:
     virtual bool ProcessEvent(wxEvent& event);
 
     // add an event to be processed later
-    virtual void AddPendingEvent(wxEvent& event);
+    virtual void AddPendingEvent(const wxEvent& event);
 
     void ProcessPendingEvents();
 
 #if wxUSE_THREADS
-    bool ProcessThreadEvent(wxEvent& event);
+    bool ProcessThreadEvent(const wxEvent& event);
 #endif
 
     // Dynamic association of a member function handler with the event handler,
@@ -2498,7 +2498,7 @@ private:
 
 // Post a message to the given eventhandler which will be processed during the
 // next event loop iteration
-inline void wxPostEvent(wxEvtHandler *dest, wxEvent& event)
+inline void wxPostEvent(wxEvtHandler *dest, const wxEvent& event)
 {
     wxCHECK_RET( dest, wxT("need an object to post event to in wxPostEvent") );
 

src/common/event.cpp

@@ -1056,7 +1056,7 @@ wxEvtHandler::~wxEvtHandler()
 
 #if wxUSE_THREADS
 
-bool wxEvtHandler::ProcessThreadEvent(wxEvent& event)
+bool wxEvtHandler::ProcessThreadEvent(const wxEvent& event)
 {
     // check that we are really in a child thread
     wxASSERT_MSG( !wxThread::IsMain(),
@@ -1077,7 +1077,7 @@ void wxEvtHandler::ClearEventLocker()
 
 #endif // wxUSE_THREADS
 
-void wxEvtHandler::AddPendingEvent(wxEvent& event)
+void wxEvtHandler::AddPendingEvent(const wxEvent& event)
 {
     // 1) Add event to list of pending events of this event handler