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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file GUI/View/FitControl/GUIFitObserver.cpp
//! @brief Implements class GUIFitObserver.
//!
//! @homepage http://www.bornagainproject.org
//! @license GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************************************
#include "GUI/View/FitControl/GUIFitObserver.h"
#include "Device/Data/Datafield.h"
#include "Fit/Minimizer/MinimizerResult.h"
#include "Sim/Fitting/FitObjective.h"
#include "Sim/Fitting/IterationInfo.h"
#include "Sim/Fitting/SimDataPair.h"
GUIFitObserver::GUIFitObserver(QObject* parent)
: QObject(parent)
, m_block_update_plots(false)
, m_update_interval(1)
{
}
GUIFitObserver::~GUIFitObserver() = default;
void GUIFitObserver::update(const FitObjective* subject)
{
if (!is_suitable_iteration(subject))
return;
std::unique_lock<std::mutex> lock(m_update_plot_mutex);
if (m_block_update_plots && !is_obligatory_iteration(subject))
return; // plotting still works, will skip iteration
if (m_block_update_plots)
m_on_finish_notifier.wait(lock, [this] { return m_block_update_plots; });
FitProgressInfo info;
info.m_chi2 = subject->iterationInfo().chi2();
info.m_iteration_count = static_cast<int>(subject->iterationInfo().iterationCount());
info.m_values = subject->iterationInfo().parameters().values();
if (subject->isCompleted())
info.m_log_info = subject->minimizerResult().toString();
info.m_sim_values = subject->dataPair().simulationResult().flatVector();
m_iteration_info = info;
emit updateReady();
}
//! Returns true if data could be plotted, when there are resources for it.
bool GUIFitObserver::is_suitable_iteration(const FitObjective* fitSuite) const
{
if (fitSuite->isInterrupted())
return false;
int n_iter = static_cast<int>(fitSuite->iterationInfo().iterationCount());
return fitSuite->isFirstIteration() || n_iter % m_update_interval == 0
|| fitSuite->isCompleted();
}
//! Returns true if given iteration should be obligary plotted.
bool GUIFitObserver::is_obligatory_iteration(const FitObjective* fitSuite) const
{
return fitSuite->isCompleted();
}
void GUIFitObserver::setInterval(int val)
{
m_update_interval = val;
}
//! Informs observer that FitSuiteWidget has finished plotting and is ready for next plot
void GUIFitObserver::finishedPlotting()
{
std::unique_lock<std::mutex> lock(m_update_plot_mutex);
m_block_update_plots = false;
lock.unlock();
m_on_finish_notifier.notify_one();
}
FitProgressInfo GUIFitObserver::progressInfo()
{
std::unique_lock<std::mutex> lock(m_update_plot_mutex);
m_block_update_plots = true;
return m_iteration_info;
}
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