Fixes for split tree when using generic tree control

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@51154 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

contrib/include/wx/gizmos/splittree.h

@@ -80,6 +80,13 @@ public:
     // In case we're using the generic tree control.
     virtual int GetScrollPos(int orient) const;
 
+    // Override to suppress vertical scrollbar
+    virtual void SetScrollbar(int orient,
+                               int pos,
+                               int thumbVisible,
+                               int range,
+                               bool update);
+
 //// Helpers
     void HideVScrollbar();
 

contrib/src/gizmos/splittree.cpp

@@ -98,6 +98,19 @@ void wxRemotelyScrolledTreeCtrl::HideVScrollbar()
 #endif
 }
 
+void wxRemotelyScrolledTreeCtrl::SetScrollbar(int orient,
+                               int pos,
+                               int thumbVisible,
+                               int range,
+                               bool update)
+{
+#ifndef __WXMSW__
+    if (orient == wxVERTICAL)
+        range = 0;
+#endif
+    wxWindow::SetScrollbar(orient, pos, thumbVisible, range, update);
+}
+
 // Number of pixels per user unit (0 or -1 for no scrollbar)
 // Length of virtual canvas in user units
 // Length of page in user units
@@ -447,6 +460,10 @@ void wxRemotelyScrolledTreeCtrl::OnScroll(wxScrollWinEvent& event)
     scrollWin->GetViewStart(& x, & y);
 
     ScrollToLine(-1, y);
+
+#ifndef __WXMSW__
+    m_yScrollPosition = GetScrollPos(wxVERTICAL);
+#endif
 }
 
 /*