Partial fix for #15714: Caret jumping problem in wxRichTextCtrl text selection

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75317 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/richtext/richtextctrl.cpp

@@ -964,6 +964,9 @@ void wxRichTextCtrl::OnMoveMouse(wxMouseEvent& event)
         && !m_preDrag
         && (distance > 4)
 #endif
+        // Don't select to the end of the container when going outside the window
+        // For analysis, see http://trac.wxwidgets.org/ticket/15714
+        && (! (hitObj == (& m_buffer) && ((hit & wxRICHTEXT_HITTEST_OUTSIDE) != 0)))
         )
     {
         SetCaretPositionAfterClick(container, position, hit, true /* extend selection */);