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/*=========================================================================
*
* Copyright UMC Utrecht and contributors
*
* 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.
*
*=========================================================================*/
#include "elxProgressCommand.h"
#include "elxlog.h"
#include "itkMath.h" // itk::Math::Round
namespace elastix
{
/**
* ******************* Constructor ***********************
*/
ProgressCommand::ProgressCommand()
{
m_StartString = "Progress: ";
m_EndString = "%";
m_Tag = 0;
m_TagIsSet = false;
m_ObservedProcessObject = nullptr;
m_NumberOfVoxels = 0;
m_NumberOfUpdates = 0;
} // end Constructor()
/**
* ******************* Destructor ***********************
*/
ProgressCommand::~ProgressCommand()
{
this->DisconnectObserver(m_ObservedProcessObject);
} // end Destructor()
/**
* ******************* SetUpdateFrequency ***********************
*/
void
ProgressCommand::SetUpdateFrequency(const unsigned long numberOfVoxels, const unsigned long numberOfUpdates)
{
/** Set the member variables. */
m_NumberOfVoxels = numberOfVoxels;
m_NumberOfUpdates = numberOfUpdates;
/** Make sure we have at least one pixel. */
if (m_NumberOfVoxels < 1)
{
m_NumberOfVoxels = 1;
}
/** We cannot update more times than there are pixels. */
if (m_NumberOfUpdates > m_NumberOfVoxels)
{
m_NumberOfUpdates = m_NumberOfVoxels;
}
/** Make sure we update at least once. */
if (m_NumberOfUpdates < 1)
{
m_NumberOfUpdates = 1;
}
} // end SetUpdateFrequency()
/**
* ******************* ConnectObserver ***********************
*/
void
ProgressCommand::ConnectObserver(itk::ProcessObject * filter)
{
/** Disconnect from old observed filters. */
this->DisconnectObserver(m_ObservedProcessObject);
/** Connect to the new filter. */
m_Tag = filter->AddObserver(itk::ProgressEvent(), this);
m_TagIsSet = true;
m_ObservedProcessObject = filter;
} // end ConnectObserver()
/**
* ******************* DisconnectObserver ***********************
*/
void
ProgressCommand::DisconnectObserver(itk::ProcessObject * filter)
{
if (m_TagIsSet)
{
filter->RemoveObserver(m_Tag);
m_TagIsSet = false;
m_ObservedProcessObject = nullptr;
}
} // end DisconnectObserver()
/**
* ******************* Execute ***********************
*/
void
ProgressCommand::Execute(itk::Object * caller, const itk::EventObject & event)
{
itk::ProcessObject * po = dynamic_cast<itk::ProcessObject *>(caller);
if (!po)
{
return;
}
if (typeid(event) == typeid(itk::ProgressEvent))
{
this->PrintProgress(po->GetProgress());
}
} // end Execute()
/**
* ******************* Execute ***********************
*/
void
ProgressCommand::Execute(const itk::Object * caller, const itk::EventObject & event)
{
const itk::ProcessObject * po = dynamic_cast<const itk::ProcessObject *>(caller);
if (!po)
{
return;
}
if (typeid(event) == typeid(itk::ProgressEvent))
{
this->PrintProgress(po->GetProgress());
}
} // end Execute()
/**
* ******************* PrintProgress ***********************
*/
void
ProgressCommand::PrintProgress(const float progress) const
{
/** Print the progress to the screen. */
const int progressInt = itk::Math::Round<int>(100 * progress);
// Pass the entire message at once, rather than having multiple `<<` insertions.
const std::string message = '\r' + m_StartString + std::to_string(progressInt) + m_EndString;
std::cout << message << std::flush;
/** If the process is completed, print an end-of-line. *
if ( progress > 0.99999 )
{
std::cout << std::endl;
}*/
} // end PrintProgress()
/**
* ******************* PrintProgress ***********************
*/
void
ProgressCommand::UpdateAndPrintProgress(const unsigned long currentVoxelNumber) const
{
const unsigned long frac = static_cast<unsigned long>(m_NumberOfVoxels / m_NumberOfUpdates);
if (currentVoxelNumber % frac == 0)
{
this->PrintProgress(static_cast<float>(currentVoxelNumber) / static_cast<float>(m_NumberOfVoxels));
}
} // end PrintProgress()
ProgressCommand::Pointer
ProgressCommand::CreateAndSetUpdateFrequency(const unsigned long numberOfVoxels)
{
const auto result = Self::New();
result->Self::SetUpdateFrequency(numberOfVoxels, numberOfVoxels);
result->SetStartString(" Progress: ");
return result;
}
ProgressCommand::Pointer
ProgressCommand::CreateAndConnect(itk::ProcessObject & processObject)
{
const auto result = Self::New();
result->Self::ConnectObserver(&processObject);
result->Self::SetStartString(" Progress: ");
result->Self::SetEndString("%");
return result;
}
} // namespace elastix
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