1. big wxScrollBar optimization: Refresh() doesn't refresh them any more

2. many fixes to refresh scrollbars when needed (as this is not done all
   the time now)
3. wxStdButtonInputHandler bug with uninit m_hasMouse fixing bug with
   moving mouse with pressed left button into button
4. wxRadioBox::SetSelection() and wxRadioButton::SetValue() clear the
   values of the other buttons in the same radio group
5. wxTextCtrl::RefreshPixelRange() calculates the end of line correctly
6. tons of wxListBox fixes
7. removed confusing "Create" button from the lbox sample, listbox is now
   recreated on the fly


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/wxUNIVERSAL@8615 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/univ/checkbox.h

@@ -114,6 +114,9 @@ protected:
     // send command event notifying about the checkbox state change
     virtual void SendEvent();
 
+    // called when the checkbox becomes checked - radio button hook
+    virtual void OnCheck();
+
     // get the state corresponding to the flags (combination of wxCONTROL_XXX)
     wxCheckBox::State GetState(int flags) const;