File: TestTransferFunctionPresets.cxx

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/*=========================================================================

Program:   ParaView
Module:    TestTransferFunctionPresets.cxx

Copyright (c) Kitware, Inc.
All rights reserved.
See Copyright.txt or http://www.paraview.org/HTML/Copyright.html 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 "vtkInitializationHelper.h"
#include "vtkNew.h"
#include "vtkSmartPointer.h"
#include "vtkPVXMLElement.h"
#include "vtkProcessModule.h"
#include "vtkSMTransferFunctionPresets.h"

#include "vtk_jsoncpp.h"
#include <sstream>
#include <cassert>

#define myassert(condition, message) \
  if ((condition)) \
  { cout << message << " -- SUCCESS" << endl; } \
  else  \
  { cout << message << " -- FAILED" << endl; return EXIT_FAILURE; }

int TestTransferFunctionPresets(int argc, char* argv[])
{
  (void) argc;

  vtkInitializationHelper::Initialize(argv[0], vtkProcessModule::PROCESS_CLIENT);

  vtkSmartPointer<vtkSMTransferFunctionPresets> presets = vtkSmartPointer<vtkSMTransferFunctionPresets>::New();

  myassert(presets->GetNumberOfPresets() > 0, "Load presets");
  cout << "Number of presets: " << presets->GetNumberOfPresets() << endl;

  unsigned int testPreset = 10;

  myassert(presets->GetPresetAsString(testPreset).empty() == false, "Has test preset");
  cout << "Preset: " << endl
       << presets->GetPresetAsString(testPreset);

  unsigned int old_size = presets->GetNumberOfPresets();

  // Test that "builtin" preset cannot be removed.
  myassert(presets->RemovePreset(testPreset) == false, "Cannot remove builtin preset");
  myassert(presets->GetNumberOfPresets() == old_size, "Preset size is unchanged");

  // Test that "builtin" preset can be overridden.
  Json::Value preset = presets->GetPreset(testPreset);
  preset["ColorSpace"] = "Bogus";
  presets->AddPreset("Bogus", preset);
  /*

  myassert(presets->GetPreset(testPreset)["ColorSpace"].asString() == "Bogus", "Overridden preset is of right type");

  // create new instance and verify that our overridden preset survived.
  presets = vtkSmartPointer<vtkSMTransferFunctionPresets>::New();
  myassert(presets->GetPresetAsString(testPreset).empty() == false, "Has overridden preset on reload");
  cout << "Preset: " << endl
       << presets->GetPresetAsString(testPreset);
  myassert(presets->GetPreset(testPreset)["ColorSpace"].asString() == "Bogus", "Overridden preset is of right type");
  myassert(presets->RemovePreset(testPreset) == true, "Can remove custom preset after reload");

  // Now we'd expect to get the default preset.
  presets = vtkSmartPointer<vtkSMTransferFunctionPresets>::New();
  myassert(presets->GetPresetAsString(testPreset).empty() == false, "Can restore builtin preset");

  // create new instance and verify that our overridden preset survived.
  presets = vtkSmartPointer<vtkSMTransferFunctionPresets>::New();
  myassert(presets->GetPresetAsString(testPreset) != NULL, "Has test preset");
  myassert(presets->RemovePreset(testPreset) == false, "Cannot remove builtin preset");
  */

  presets = NULL;

  vtkInitializationHelper::Finalize();
  return EXIT_SUCCESS;
}