added wxApp::IsMainLoopRunnning() (see bug 994293)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@29645 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/app.h

@@ -376,6 +376,17 @@ public:
     // the worker functions - usually not used directly by the user code
     // -----------------------------------------------------------------
 
+        // return true if we're running main loop, i.e. if the events can
+        // (already) be dispatched
+    bool IsMainLoopRunning() const
+    {
+#if wxUSE_EVTLOOP_IN_APP
+        return m_mainLoop != NULL;
+#else
+        return false;
+#endif
+    }
+
         // execute the main GUI loop, the function returns when the loop ends
     virtual int MainLoop();