data_out_stack.h

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// ---------------------------------------------------------------------
//
// Copyright (C) 1999 - 2019 by the deal.II authors
//
// This file is part of the deal.II library.
//
// The deal.II library is free software; you can use it, redistribute
// it, and/or modify it under the terms of the GNU Lesser General
// Public License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// The full text of the license can be found in the file LICENSE.md at
// the top level directory of deal.II.
//
// ---------------------------------------------------------------------

#ifndef dealii_data_out_stack_h
#define dealii_data_out_stack_h


#include <deal.II/base/config.h>

#include <deal.II/base/data_out_base.h>
#include <deal.II/base/smartpointer.h>

#include <deal.II/lac/vector.h>

#include <deal.II/numerics/data_out_dof_data.h>

#include <string>
#include <vector>

DEAL_II_NAMESPACE_OPEN

// Forward declaration
#ifndef DOXYGEN
template <int dim, int spacedim>
class DoFHandler;
#endif

template <int dim,
          int spacedim            = dim,
          typename DoFHandlerType = DoFHandler<dim, spacedim>>
class DataOutStack : public DataOutInterface<dim + 1>
{
public:
  enum VectorType
  {
    cell_vector,
    dof_vector
  };

  virtual ~DataOutStack() override = default;

  void
  new_parameter_value(const double parameter_value,
                      const double parameter_step);

  void
  attach_dof_handler(const DoFHandlerType &dof_handler);

  void
  declare_data_vector(const std::string &name, const VectorType vector_type);

  void
  declare_data_vector(const std::vector<std::string> &name,
                      const VectorType                vector_type);


  template <typename number>
  void
  add_data_vector(const Vector<number> &vec, const std::string &name);

  template <typename number>
  void
  add_data_vector(const Vector<number> &          vec,
                  const std::vector<std::string> &names);

  void
  build_patches(const unsigned int n_subdivisions = 0);

  void
  finish_parameter_value();

  std::size_t
  memory_consumption() const;

  DeclException1(
    ExcVectorNotDeclared,
    std::string,
    << "The data vector for which the first component has the name " << arg1
    << " has not been added before.");
  DeclExceptionMsg(ExcDataNotCleared,
                   "You cannot start a new time/parameter step before calling "
                   "finish_parameter_value() on the previous step.");
  DeclExceptionMsg(
    ExcDataAlreadyAdded,
    "You cannot declare additional vectors after already calling "
    "build_patches(). All data vectors need to be declared "
    "before you call this function the first time.");
  DeclException1(ExcNameAlreadyUsed,
                 std::string,
                 << "You tried to declare a component of a data vector with "
                 << "the name <" << arg1
                 << ">, but that name is already used.");

private:
  double parameter;

  double parameter_step;

  SmartPointer<const DoFHandlerType,
               DataOutStack<dim, spacedim, DoFHandlerType>>
    dof_handler;

  std::vector<::DataOutBase::Patch<dim + 1, dim + 1>> patches;

  struct DataVector
  {
    Vector<double> data;

    std::vector<std::string> names;

    std::size_t
    memory_consumption() const;
  };

  std::vector<DataVector> dof_data;

  std::vector<DataVector> cell_data;

  virtual const std::vector<::DataOutBase::Patch<dim + 1, dim + 1>> &
  get_patches() const override;


  virtual std::vector<std::string>
  get_dataset_names() const override;
};


DEAL_II_NAMESPACE_CLOSE

#endif