add wxAppConsoleBase::OnEventLoopEnter/Exit callbacks; add wxEventLoopBase::IsMain() and wxAppConsoleBase::GetMainLoop() helpers

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@59132 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/app.h

@@ -91,6 +91,14 @@ public:
     */
     virtual int FilterEvent(wxEvent& event);
 
+    /**
+        Returns the main event loop instance, i.e. the event loop which is started
+        by OnRun() and which dispatches all events sent from the native toolkit
+        to the application (except when new event loops are temporarily set-up).
+        The returned value maybe @NULL. Put initialization code which needs a
+        non-@NULL main event loop into OnEventLoopEnter().
+    */
+    wxEventLoopBase* GetMainLoop() const;
 
     /**
         This function simply invokes the given method @a func of the specified
@@ -254,6 +262,22 @@ public:
     */
     virtual bool OnCmdLineParsed(wxCmdLineParser& parser);
 
+    /**
+        Called by wxEventLoopBase::SetActive(): you can override this function
+        and put here the code which needs an active event loop.
+
+        Note that this function is called whenever an event loop is activated;
+        you may want to use wxEventLoopBase::IsMain() to perform initialization
+        specific for the app's main event loop.
+    */
+    virtual void OnEventLoopEnter(wxEventLoopBase* loop);
+
+    /**
+        Called by wxEventLoopBase::OnExit() for each event loop which
+        is exited.
+    */
+    virtual void OnEventLoopExit(wxEventLoopBase* loop);
+
     /**
         This function is called if an unhandled exception occurs inside the main
         application event loop. It can return @true to ignore the exception and to