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/popupwin.h

@@ -30,11 +30,26 @@ public:
 
     bool Create(wxWindow *parent, int flags = wxBORDER_NONE);
 
+    // implementation only from now on
+    // -------------------------------
+
+    // override Show() to prevent wxPopupWindow from being activated
+    virtual bool Show(bool show = TRUE);
+
+    // find a shown popup window with the given window as parent, return NULL
+    // if none
+    static wxPopupWindow *FindPopupFor(wxWindow *win);
+
 protected:
+    // popups handle the position like wxTopLevelWindow, not wxWindow
     virtual void DoGetPosition(int *x, int *y) const;
 
+    // return the style to be used for the popup windows
     virtual WXDWORD MSWGetStyle(long flags, WXDWORD *exstyle) const;
 
+    // the list of all currently shown popup windows used by FindPopupFor()
+    static wxWindowList ms_shownPopups;
+
     DECLARE_DYNAMIC_CLASS(wxPopupWindow)
 };