prevent the parent window from losing activation when a popup is shown

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@15662 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/toplevel.h

@@ -89,10 +89,17 @@ protected:
     // common part of Iconize(), Maximize() and Restore()
     void DoShowWindow(int nShowCmd);
 
+    // prevent the window from being deactivated sometimes (see comments in the
+    // code)
+    long HandleNcActivate(bool activate);
+
     // translate wxWindows flags to Windows ones
     virtual WXDWORD MSWGetStyle(long flags, WXDWORD *exstyle) const;
 
-    // is the frame currently iconized?
+    // we handle WM_NCACTIVATE specially here
+    virtual long MSWWindowProc(WXUINT msg, WXWPARAM wParam, WXLPARAM lParam);
+
+    // is the window currently iconized?
     bool m_iconized;
 
     // should the frame be maximized when it will be shown? set by Maximize()