Added UpdateSize to wxSplitterWindow, to allow an app

to force pane resizing _before_ showing the window.
Added a call to UpdateSize from helpfrm.cpp. Without
this, the flicker is horrible.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@26333 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/generic/splitter.h

@@ -129,6 +129,11 @@ public:
     // parameter should be NULL)
     bool ReplaceWindow(wxWindow *winOld, wxWindow *winNew);
 
+    // Make sure the child window sizes are updated. This is useful
+    // for reducing flicker by updating the sizes before a
+    // window is shown, if you know the overall size is correct.
+    void UpdateSize();
+
     // Is the window split?
     bool IsSplit() const { return (m_windowTwo != NULL); }