ENH: vtkLevelIdScalars for backwards compatibility

Added vtkLevelIdScalars filter, an empty class that inherits
from vtkOverlappingAMRLevelIdScalars for backwards compatibility.

Change-Id: I0ac7426ea2fff014ca2c78a57aa04c8db1bbe32e

Graphics/vtkLevelIdScalars.cxx

+/*=========================================================================
+
+ Program:   Visualization Toolkit
+ Module:    vtkLevelIdScalars.cxx
+
+ Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
+ All rights reserved.
+ See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
+
+ This software is distributed WITHOUT ANY WARRANTY; without even
+ the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ PURPOSE.  See the above copyright notice for more information.
+
+ =========================================================================*/
+#include "vtkLevelIdScalars.h"
+#include "vtkObjectFactory.h"
+
+
+vtkStandardNewMacro(vtkLevelIdScalars);
+
+//------------------------------------------------------------------------------
+vtkLevelIdScalars::vtkLevelIdScalars()
+{
+
+}
+
+//------------------------------------------------------------------------------
+vtkLevelIdScalars::~vtkLevelIdScalars()
+{
+
+}
+
+//------------------------------------------------------------------------------
+void vtkLevelIdScalars::PrintSelf(ostream& os, vtkIndent indent)
+{
+  this->Superclass::PrintSelf(os,indent);
+}

Graphics/vtkLevelIdScalars.h

+/*=========================================================================
+
+ Program:   Visualization Toolkit
+ Module:    vtkLevelIdScalars.h
+
+ Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
+ All rights reserved.
+ See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
+
+ This software is distributed WITHOUT ANY WARRANTY; without even
+ the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ PURPOSE.  See the above copyright notice for more information.
+
+ =========================================================================*/
+// .NAME vtkLevelIdScalars.h -- Empty class for backwards compatibility
+//
+// .SECTION Description
+//  Empty class for backwards compatibility.
+#ifndef VTKLEVELIDSCALARS_H_
+#define VTKLEVELIDSCALARS_H_
+
+#include "vtkOverlappingAMRLevelIdScalars.h"
+
+class VTK_GRAPHICS_EXPORT vtkLevelIdScalars :
+  public vtkOverlappingAMRLevelIdScalars
+{
+  public:
+    static vtkLevelIdScalars* New();
+    vtkTypeMacro(vtkLevelIdScalars,vtkOverlappingAMRLevelIdScalars);
+    void PrintSelf(ostream& os, vtkIndent indent);
+
+  protected:
+    vtkLevelIdScalars();
+    virtual ~vtkLevelIdScalars();
+
+  private:
+    vtkLevelIdScalars(const vtkLevelIdScalars&); // Not implemented
+    void operator=(const vtkLevelIdScalars&); // Not implemented
+};
+
+#endif /* VTKLEVELIDSCALARS_H_ */