blockMesh reader fix, start refactoring of PV3Readers

- apply scaleFactor (eg, mm->m) in PV3 reader - this looks better when
  overlaying with other objects

- stop segfault when paraview exits without deleting readers first

applications/utilities/postProcessing/graphics/PV3Readers/vtkPV3Readers/vtkPV3Readers.H

@@ -0,0 +1,229 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software; you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by the
+    Free Software Foundation; either version 2 of the License, or (at your
+    option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM; if not, write to the Free Software Foundation,
+    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+Namespace
+    Foam::vtkPV3Readers
+
+Description
+    A collection of helper functions when building a reader interface in
+    ParaView3.
+
+SourceFiles
+    vtkPV3Readers.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef vtkPV3Readers_H
+#define vtkPV3Readers_H
+
+// do not include legacy strstream headers
+#ifndef  VTK_EXCLUDE_STRSTREAM_HEADERS
+# define VTK_EXCLUDE_STRSTREAM_HEADERS
+#endif
+
+#include "className.H"
+#include "fileName.H"
+#include "stringList.H"
+#include "wordList.H"
+#include "HashSet.H"
+
+
+// * * * * * * * * * * * * * Forward Declarations  * * * * * * * * * * * * * //
+
+class vtkDataArraySelection;
+class vtkDataSet;
+class vtkPoints;
+class vtkPV3FoamReader;
+class vtkRenderer;
+class vtkTextActor;
+class vtkMultiBlockDataSet;
+class vtkPolyData;
+class vtkUnstructuredGrid;
+class vtkIndent;
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace vtkPV3Readers 
+{
+    //- Declare name of the class and its debug switch
+    NamespaceName("vtkPV3Readers");
+
+    //- Bookkeeping for GUI checklists and the multi-block organization
+    class partInfo
+    {
+        const char *name_;
+        int block_;
+        int start_;
+        int size_;
+
+    public:
+
+        partInfo(const char *name, const int blockNo=0)
+        :
+            name_(name),
+            block_(blockNo),
+            start_(-1),
+            size_(0)
+        {}
+
+        //- Return the block holding these datasets
+        int block() const
+        {
+            return block_;
+        }
+
+        //- Assign block number, return previous value
+        int block(int blockNo)
+        {
+            int prev = block_;
+            block_ = blockNo;
+            return prev;
+        }
+
+        const char* name() const
+        {
+            return name_;
+        }
+
+        int start() const
+        {
+            return start_;
+        }
+
+        int end() const
+        {
+            return start_ + size_;
+        }
+
+        int size() const
+        {
+            return size_;
+        }
+
+        bool empty() const
+        {
+            return !size_;
+        }
+
+        void reset()
+        {
+            start_ = -1;
+            size_ = 0;
+        }
+
+        //- Assign new start and reset the size
+        void operator=(const int i)
+        {
+            start_ = i;
+            size_ = 0;
+        }
+
+        //- Increment the size
+        void operator+=(const int n)
+        {
+            size_ += n;
+        }
+    };
+
+
+    //- Convenience method use to convert the readers from VTK 5
+    //  multiblock API to the current composite data infrastructure
+    void AddToBlock
+    (
+        vtkMultiBlockDataSet* output,
+        vtkDataSet* dataset,
+        const partInfo& selector,
+        const label datasetNo,
+        const std::string& datasetName
+    );
+
+
+    //- Convenience method use to convert the readers from VTK 5
+    // multiblock API to the current composite data infrastructure
+    vtkDataSet* GetDataSetFromBlock
+    (
+        vtkMultiBlockDataSet* output,
+        const partInfo& selector,
+        const label datasetNo
+    );
+
+    //- Convenience method use to convert the readers from VTK 5
+    // multiblock API to the current composite data infrastructure
+    // ununsed at the moment
+    label GetNumberOfDataSets
+    (
+        vtkMultiBlockDataSet* output,
+        const partInfo& selector
+    );
+
+
+    //- Retrieve the current selections as a wordHashSet
+    wordHashSet getSelected
+    (
+        vtkDataArraySelection* select
+    );
+
+
+    //- Retrieve a sub-list of the current selections
+    wordHashSet getSelected
+    (
+        vtkDataArraySelection*,
+        const partInfo&
+    );
+
+
+    //- Retrieve the current selections
+    stringList getSelectedArrayEntries(vtkDataArraySelection*);
+
+    //- Retrieve a sub-list of the current selections
+    stringList getSelectedArrayEntries
+    (
+        vtkDataArraySelection* select,
+        const partInfo& selector
+    );
+
+
+    //- Set selection(s)
+    void setSelectedArrayEntries
+    (
+        vtkDataArraySelection*,
+        const stringList&
+    );
+
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace vtkPV3
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //