itkProgressAccumulator.h

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef itkProgressAccumulator_h
#define itkProgressAccumulator_h

#include "itkCommand.h"
#include "itkProcessObject.h"
#include <vector>

namespace itk
{
class ITKCommon_EXPORT ProgressAccumulator:public Object
{
public:

  using Self = ProgressAccumulator;
  using Superclass = Object;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  using GenericFilterType = ProcessObject;
  using GenericFilterPointer = GenericFilterType::Pointer;

  itkNewMacro(Self);

  itkTypeMacro(ProgressAccumulator, Object);

  itkGetConstMacro(AccumulatedProgress, float);

  itkSetObjectMacro(MiniPipelineFilter, ProcessObject);

  itkGetModifiableObjectMacro(MiniPipelineFilter, ProcessObject);

  void RegisterInternalFilter(GenericFilterType *filter, float weight);

  void UnregisterAllFilters();

#if ! defined ( ITK_LEGACY_REMOVE )
  void ResetProgress();
#endif

#if ! defined ( ITK_LEGACY_REMOVE )
  void ResetFilterProgressAndKeepAccumulatedProgress();
#endif

protected:
  ProgressAccumulator();
  ~ProgressAccumulator() override;
  void PrintSelf(std::ostream & s, Indent indent) const override;

private:
  using CommandType = MemberCommand< Self >;
  using CommandPointer = CommandType::Pointer;

  struct FilterRecord {
    // Pointer to the filter
    GenericFilterPointer Filter;

    // The weight of the filter in total progress of the mini-pipeline
    float Weight;

    // The tags for adding/removing observers to mini-pipeline filter
    unsigned long ProgressObserverTag;
    unsigned long StartObserverTag;
  };

  void ReportProgress(Object *object, const EventObject & event);

  GenericFilterPointer m_MiniPipelineFilter;

  using FilterRecordVector = std::vector< struct FilterRecord >;

  float m_AccumulatedProgress;

  float m_BaseAccumulatedProgress;

  FilterRecordVector m_FilterRecord;

  CommandPointer m_CallbackCommand;
};
} // End namespace itk

#endif // itkProgressAccumulator_h_