FitPropertyBrowser.cpp

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2018 ISIS Rutherford Appleton Laboratory UKRI,
//   NScD Oak Ridge National Laboratory, European Spallation Source,
//   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#include "MantidQtWidgets/Common/FitPropertyBrowser.h"
#include "MantidQtWidgets/Common/HelpWindow.h"
#include "MantidQtWidgets/Common/MantidDesktopServices.h"
#include "MantidQtWidgets/Common/MultifitSetupDialog.h"
#include "MantidQtWidgets/Common/PropertyHandler.h"
#include "MantidQtWidgets/Common/QSettingsChangeAware.h"
#include "MantidQtWidgets/Common/SequentialFitDialog.h"
 
#include "MantidAPI/AlgorithmManager.h"
#include "MantidAPI/CompositeFunction.h"
#include "MantidAPI/CostFunctionFactory.h"
#include "MantidAPI/FrameworkManager.h"
#include "MantidAPI/FuncMinimizerFactory.h"
#include "MantidAPI/IBackgroundFunction.h"
#include "MantidAPI/ICostFunction.h"
#include "MantidAPI/IFuncMinimizer.h"
#include "MantidAPI/IPeakFunction.h"
#include "MantidAPI/MatrixWorkspace.h"
#include "MantidAPI/ParameterTie.h"
#include "MantidAPI/TableRow.h"
#include "MantidAPI/WorkspaceFactory.h"
#include "MantidAPI/WorkspaceGroup.h"
 
#include "MantidKernel/ConfigService.h"
#include "MantidKernel/Logger.h"
 
#include "MantidQtWidgets/Common/QtPropertyBrowser/FilenameDialogEditor.h"
#include "MantidQtWidgets/Common/QtPropertyBrowser/FormulaDialogEditor.h"
#include "MantidQtWidgets/Common/QtPropertyBrowser/StringEditorFactory.h"
 
#include "MantidQtWidgets/Common/QtPropertyBrowser/DoubleEditorFactory.h"
#include "MantidQtWidgets/Common/QtPropertyBrowser/ParameterPropertyManager.h"
#include "MantidQtWidgets/Common/QtPropertyBrowser/qteditorfactory.h"
#include "MantidQtWidgets/Common/QtPropertyBrowser/qttreepropertybrowser.h"
 
#include <Poco/ActiveResult.h>
 
#include <QApplication>
#include <QClipboard>
#include <QGridLayout>
#include <QInputDialog>
#include <QListWidget>
#include <QMenu>
#include <QMessageBox>
#include <QPushButton>
#include <QSettings>
#include <QSignalMapper>
#include <QTreeWidget>
#include <QUrl>
#include <QVBoxLayout>
 
#include <algorithm>
#include <utility>
 
namespace MantidQt {
using API::MantidDesktopServices;
 
namespace MantidWidgets {
 
namespace {
Mantid::Kernel::Logger g_log("FitPropertyBrowser");
 
using namespace Mantid::API;
 
int getNumberOfSpectra(const MatrixWorkspace_sptr &workspace) {
  return static_cast<int>(workspace->getNumberHistograms());
}
} // namespace
 
FitPropertyBrowser::FitPropertyBrowser(QWidget *parent, QObject *mantidui)
    : QDockWidget("Fit Function", parent), m_workspaceIndex(nullptr), m_startX(nullptr), m_endX(nullptr),
      m_output(nullptr), m_minimizer(nullptr), m_ignoreInvalidData(nullptr), m_costFunction(nullptr),
      m_maxIterations(nullptr), m_peakRadius(nullptr), m_plotDiff(nullptr), m_excludeRange(nullptr),
      m_plotCompositeMembers(nullptr), m_convolveMembers(nullptr), m_rawData(nullptr), m_xColumn(nullptr),
      m_yColumn(nullptr), m_errColumn(nullptr), m_showParamErrors(nullptr), m_evaluationType(nullptr),
      m_compositeFunction(), m_browser(nullptr), m_fitActionUndoFit(nullptr), m_fitActionSeqFit(nullptr),
      m_fitActionFit(nullptr), m_fitActionEvaluate(nullptr), m_functionsGroup(nullptr), m_settingsGroup(nullptr),
      m_customSettingsGroup(nullptr), m_changeSlotsEnabled(false), m_guessOutputName(true),
      m_updateObserver(*this, &FitPropertyBrowser::handleFactoryUpdate), m_fitMapper(nullptr), m_fitMenu(nullptr),
      m_displayActionPlotGuess(nullptr), m_displayActionQuality(nullptr), m_displayActionClearAll(nullptr),
      m_setupActionCustomSetup(nullptr), m_setupActionRemove(nullptr), m_tip(nullptr), m_fitSelector(nullptr),
      m_fitTree(nullptr), m_currentHandler(nullptr), m_defaultFunction("Gaussian"), m_defaultPeak("Gaussian"),
      m_defaultBackground("LinearBackground"), m_peakToolOn(false), m_hideWsListWidget(false), m_auto_back(false),
      m_autoBgName(
          QString::fromStdString(Mantid::Kernel::ConfigService::Instance().getString("curvefitting.autoBackground"))),
      m_autoBackground(nullptr), m_decimals(-1), m_mantidui(mantidui), m_shouldBeNormalised(false),
      m_fitAlgParameters(""), m_oldWorkspaceIndex(-1) {
  Mantid::API::FrameworkManager::Instance().loadPlugins();
 
  // If Gaussian does not exist then the plugins did not load.
  if (!Mantid::API::FunctionFactory::Instance().exists("Gaussian")) {
    throw std::runtime_error("FitPropertyBrowser: Unable to find Gaussian function\n"
                             "Has the CurveFitting plugin loaded?");
  }
  if (m_autoBgName.toLower() == "none") {
    m_autoBgName = "";
  } else {
    setAutoBackgroundName(m_autoBgName);
  }
 
  std::string def = Mantid::Kernel::ConfigService::Instance().getString("curvefitting.defaultPeak");
  if (!def.empty()) {
    m_defaultPeak = def;
  }
 
  def = Mantid::Kernel::ConfigService::Instance().getString("curvefitting.autoBackground");
  if (!def.empty()) {
    m_defaultBackground = def;
  }
  m_defaultFunction = m_defaultPeak;
 
  setObjectName("FitFunction"); // this is needed for QMainWindow::restoreState()
  setMinimumHeight(150);
  setMinimumWidth(200);
 
  QWidget *w = new QWidget(this);
 
  /* Create property managers: they create, own properties, get and set values
   */
  m_groupManager = new QtGroupPropertyManager(w);
  m_doubleManager = new QtDoublePropertyManager(w);
  m_stringManager = new QtStringPropertyManager(w);
  m_enumManager = new QtEnumPropertyManager(w);
  m_intManager = new QtIntPropertyManager(w);
  m_boolManager = new QtBoolPropertyManager(w);
  m_filenameManager = new QtStringPropertyManager(w);
  m_formulaManager = new QtStringPropertyManager(w);
  m_columnManager = new QtEnumPropertyManager(w);
  m_workspace = m_enumManager->addProperty("Workspace");
  m_vectorManager = new QtGroupPropertyManager(w);
  m_vectorSizeManager = new QtIntPropertyManager(w);
  m_vectorDoubleManager = new QtDoublePropertyManager(w);
  m_parameterManager = new ParameterPropertyManager(w);
}
 
void FitPropertyBrowser::init() {
  QWidget *w = new QWidget(this);
 
  QSettings settings;
  settings.beginGroup("Mantid/FitBrowser");
 
  /* Create function group */
  QtProperty *functionsGroup = m_groupManager->addProperty("Functions");
 
  if (m_mantidui) {
    connect(this, SIGNAL(xRangeChanged(double, double)), m_mantidui, SLOT(x_range_from_picker(double, double)));
  }
  /* Create input - output properties */
  QtProperty *settingsGroup = m_groupManager->addProperty("Settings");
  m_startX = addDoubleProperty("StartX");
  m_endX = addDoubleProperty("EndX");
 
  m_workspaceIndex = m_intManager->addProperty("Workspace Index");
  m_output = m_stringManager->addProperty("Output");
  m_minimizer = m_enumManager->addProperty("Minimizer");
  m_minimizers << "Levenberg-Marquardt"
               << "Levenberg-MarquardtMD"
               << "Trust Region"
               << "Simplex"
               << "FABADA"
               << "Conjugate gradient (Fletcher-Reeves imp.)"
               << "Conjugate gradient (Polak-Ribiere imp.)"
               << "BFGS"
               << "Damped GaussNewton";
 
  m_ignoreInvalidData = m_boolManager->addProperty("Ignore invalid data");
  setIgnoreInvalidData(settings.value("Ignore invalid data", false).toBool());
 
  m_enumManager->setEnumNames(m_minimizer, m_minimizers);
  m_costFunction = m_enumManager->addProperty("Cost function");
  m_costFunctions << "Least squares"
                  << "Rwp"
                  << "Unweighted least squares"
                  << "Poisson";
  m_enumManager->setEnumNames(m_costFunction, m_costFunctions);
  m_maxIterations = m_intManager->addProperty("Max Iterations");
  m_intManager->setValue(m_maxIterations, settings.value("Max Iterations", 500).toInt());
 
  m_peakRadius = m_intManager->addProperty("Peak Radius");
  m_intManager->setValue(m_peakRadius, settings.value("Peak Radius", 0).toInt());
 
  m_plotDiff = m_boolManager->addProperty("Plot Difference");
  bool plotDiffSetting = settings.value("Plot Difference", QVariant(true)).toBool();
  m_boolManager->setValue(m_plotDiff, plotDiffSetting);
 
  m_excludeRange = m_stringManager->addProperty("Exclude Range");
  m_excludeRange->setToolTip("A list of pairs of real numbers which define the region to exclude");
 
  m_plotCompositeMembers = m_boolManager->addProperty("Plot Composite Members");
  bool plotCompositeItems = settings.value(m_plotCompositeMembers->propertyName(), QVariant(false)).toBool();
  m_boolManager->setValue(m_plotCompositeMembers, plotCompositeItems);
 
  m_convolveMembers = m_boolManager->addProperty("Convolve Composite Members");
  bool convolveCompositeItems = settings.value(m_plotCompositeMembers->propertyName(), QVariant(false)).toBool();
  m_boolManager->setValue(m_convolveMembers, convolveCompositeItems);
 
  m_showParamErrors = m_boolManager->addProperty("Show Parameter Errors");
  bool showParamErrors = settings.value(m_showParamErrors->propertyName(), false).toBool();
  m_boolManager->setValue(m_showParamErrors, showParamErrors);
  m_parameterManager->setErrorsEnabled(showParamErrors);
 
  m_evaluationType = m_enumManager->addProperty("Evaluate Function As");
  m_evaluationType->setToolTip("Consider using Histogram fit which may produce more accurate results.");
  m_evaluationTypes << "CentrePoint"
                    << "Histogram";
  m_enumManager->setEnumNames(m_evaluationType, m_evaluationTypes);
  int evaluationType = settings.value(m_evaluationType->propertyName(), 0).toInt();
  m_enumManager->setValue(m_evaluationType, evaluationType);
 
  m_xColumn = m_columnManager->addProperty("XColumn");
  m_yColumn = m_columnManager->addProperty("YColumn");
  m_errColumn = m_columnManager->addProperty("ErrColumn");
 
  settingsGroup->addSubProperty(m_workspace);
  settingsGroup->addSubProperty(m_startX);
  settingsGroup->addSubProperty(m_endX);
 
  // Only include the cost function when in the dock widget inside mantid plot,
  // not on muon analysis widget
  // Include minimiser and plot difference under a different settings section.
  settingsGroup->addSubProperty(m_output);
  settingsGroup->addSubProperty(m_minimizer);
  settingsGroup->addSubProperty(m_ignoreInvalidData);
  settingsGroup->addSubProperty(m_costFunction);
  settingsGroup->addSubProperty(m_maxIterations);
  settingsGroup->addSubProperty(m_peakRadius);
  settingsGroup->addSubProperty(m_plotDiff);
  settingsGroup->addSubProperty(m_excludeRange);
  settingsGroup->addSubProperty(m_plotCompositeMembers);
  settingsGroup->addSubProperty(m_convolveMembers);
  settingsGroup->addSubProperty(m_showParamErrors);
  settingsGroup->addSubProperty(m_evaluationType);
 
  /* Create editors and assign them to the managers */
  createEditors(w);
 
  updateDecimals();
 
  m_functionsGroup = m_browser->addProperty(functionsGroup);
  m_settingsGroup = m_browser->addProperty(settingsGroup);
 
  initLayout(w);
}
 
void FitPropertyBrowser::initLayout(QWidget *w) { initBasicLayout(w); }
 
QPushButton *FitPropertyBrowser::createFitMenuButton(QWidget *w) {
  auto *btnFit = new QPushButton("Fit");
  m_tip = new QLabel("", w);
 
  m_fitMapper = new QSignalMapper(this);
  m_fitMenu = new QMenu(this);
  populateFitMenuButton(m_fitMapper, m_fitMenu);
  connect(m_fitMapper, SIGNAL(mappedString(const QString &)), this, SLOT(executeFitMenu(const QString &)));
  btnFit->setMenu(m_fitMenu);
  return btnFit;
}
 
void FitPropertyBrowser::populateFitMenuButton(QSignalMapper *fitMapper, QMenu *fitMenu) {
  // assert(fitmapper);
 
  m_fitActionFit = new QAction("Fit", this);
  m_fitActionSeqFit = new QAction("Sequential Fit", this);
  m_fitActionUndoFit = new QAction("Undo Fit", this);
  m_fitActionEvaluate = new QAction("Evaluate function", this);
 
  fitMapper->setMapping(m_fitActionFit, "Fit");
  fitMapper->setMapping(m_fitActionSeqFit, "SeqFit");
  fitMapper->setMapping(m_fitActionUndoFit, "UndoFit");
  fitMapper->setMapping(m_fitActionEvaluate, "Evaluate");
 
  connect(m_fitActionFit, SIGNAL(triggered()), fitMapper, SLOT(map()));
  connect(m_fitActionSeqFit, SIGNAL(triggered()), fitMapper, SLOT(map()));
  connect(m_fitActionUndoFit, SIGNAL(triggered()), fitMapper, SLOT(map()));
  connect(m_fitActionEvaluate, SIGNAL(triggered()), fitMapper, SLOT(map()));
 
  fitMenu->addAction(m_fitActionFit);
  fitMenu->addAction(m_fitActionSeqFit);
  fitMenu->addAction(m_fitActionEvaluate);
  fitMenu->addSeparator();
  fitMenu->addAction(m_fitActionUndoFit);
  fitMenu->addSeparator();
}
void FitPropertyBrowser::initBasicLayout(QWidget *w) {
  QPushButton *btnFit = createFitMenuButton(w);
  btnFit->setObjectName("button_Fit");
  // to be able to change windows title from tread
  connect(this, SIGNAL(changeWindowTitle(const QString &)), this, SLOT(setWindowTitle(const QString &)));
 
  /* Create the top level group */
 
  m_groupManager->addProperty("Fit");
 
  connect(m_enumManager, SIGNAL(propertyChanged(QtProperty *)), this, SLOT(enumChanged(QtProperty *)));
  connect(m_boolManager, SIGNAL(propertyChanged(QtProperty *)), this, SLOT(boolChanged(QtProperty *)));
  connect(m_intManager, SIGNAL(propertyChanged(QtProperty *)), this, SLOT(intChanged(QtProperty *)));
  connect(m_doubleManager, SIGNAL(propertyChanged(QtProperty *)), this, SLOT(doubleChanged(QtProperty *)));
  connect(m_stringManager, SIGNAL(propertyChanged(QtProperty *)), this, SLOT(stringChanged(QtProperty *)));
  connect(m_filenameManager, SIGNAL(propertyChanged(QtProperty *)), this, SLOT(stringChanged(QtProperty *)));
  connect(m_formulaManager, SIGNAL(propertyChanged(QtProperty *)), this, SLOT(stringChanged(QtProperty *)));
  connect(m_columnManager, SIGNAL(propertyChanged(QtProperty *)), this, SLOT(columnChanged(QtProperty *)));
  connect(m_vectorDoubleManager, SIGNAL(propertyChanged(QtProperty *)), this, SLOT(vectorDoubleChanged(QtProperty *)));
  connect(m_parameterManager, SIGNAL(propertyChanged(QtProperty *)), this, SLOT(parameterChanged(QtProperty *)));
  connect(m_vectorSizeManager, SIGNAL(propertyChanged(QtProperty *)), this, SLOT(vectorSizeChanged(QtProperty *)));
 
  auto *layout = new QVBoxLayout(w);
  layout->setObjectName("vlayout");
  auto *buttonsLayout = new QGridLayout();
 
  auto *btnDisplay = new QPushButton("Display");
  btnDisplay->setObjectName("button_Display");
  QMenu *displayMenu = new QMenu(this);
  displayMenu->setObjectName("menu_Display");
  m_displayActionPlotGuess = new QAction("Plot Guess", this);
  m_displayActionPlotGuess->setEnabled(false);
  m_displayActionQuality = new QAction("Quality", this);
  m_displayActionQuality->setObjectName("action_Quality");
  m_displayActionQuality->setCheckable(true);
  m_displayActionQuality->setChecked(true);
  m_displayActionClearAll = new QAction("Clear fit curves", this);
  QSignalMapper *displayMapper = new QSignalMapper(this);
  displayMapper->setObjectName("mapper_Display");
 
  displayMapper->setMapping(m_displayActionPlotGuess, "PlotGuess");
  displayMapper->setMapping(m_displayActionQuality, "Quality");
  displayMapper->setMapping(m_displayActionClearAll, "ClearAll");
  connect(m_displayActionPlotGuess, SIGNAL(triggered()), displayMapper, SLOT(map()));
  connect(m_displayActionQuality, SIGNAL(triggered()), displayMapper, SLOT(map()));
  connect(m_displayActionClearAll, SIGNAL(triggered()), displayMapper, SLOT(map()));
  connect(displayMapper, SIGNAL(mappedString(const QString &)), this, SLOT(executeDisplayMenu(const QString &)));
  displayMenu->addAction(m_displayActionPlotGuess);
  displayMenu->addAction(m_displayActionClearAll);
  displayMenu->addAction(m_displayActionQuality);
  btnDisplay->setMenu(displayMenu);
 
  auto *btnSetup = new QPushButton("Setup");
  btnSetup->setObjectName("button_Setup");
  QMenu *setupMenu = new QMenu(this);
  setupMenu->setObjectName("menu_Setup");
 
  m_setupActionCustomSetup = new QAction("Custom Setup", this);
  QAction *setupActionManageSetup = new QAction("Manage Setup", this);
  setupActionManageSetup->setObjectName("action_ManageSetup");
  QAction *setupActionPeakFindingAlgs = new QAction("Peak Finding Algorithms", this);
  setupActionPeakFindingAlgs->setObjectName("action_PeakFindingAlgs");
  QAction *setupActionFindPeaks = new QAction("Find Peaks", this);
  setupActionFindPeaks->setObjectName("action_FindPeaks");
  QAction *setupActionFindPeaksConvolve = new QAction("Find Peaks Convolve", this);
  setupActionFindPeaksConvolve->setObjectName("action_FindPeaksConvolve");
  QAction *setupActionClearFit = new QAction("Clear Model", this);
  setupActionClearFit->setObjectName("action_ClearModel");
 
  QMenu *setupSubMenuCustom = new QMenu(this);
  m_setupActionCustomSetup->setMenu(setupSubMenuCustom);
  // empty menu for now, so set it disabled to avoid confusing users
  m_setupActionCustomSetup->setEnabled(false);
 
  QMenu *setupSubMenuManage = new QMenu(this);
  QAction *setupActionSave = new QAction("Save Setup", this);
  m_setupActionRemove = new QAction("Remove Setup", this);
  QAction *setupActionClear = new QAction("Clear Setups", this);
  setupActionClear->setObjectName("action_ClearSetups");
  QAction *setupActionCopyToClipboard = new QAction("Copy To Clipboard", this);
  setupActionCopyToClipboard->setObjectName("action_CopyToClipboard");
  QAction *setupActionLoadFromString = new QAction("Load From String", this);
  setupActionLoadFromString->setObjectName("action_LoadFromString");
  QSignalMapper *setupManageMapper = new QSignalMapper(this);
  setupManageMapper->setMapping(setupActionSave, "SaveSetup");
  setupManageMapper->setMapping(setupActionCopyToClipboard, "CopyToClipboard");
  setupManageMapper->setMapping(setupActionLoadFromString, "LoadFromString");
  setupManageMapper->setMapping(setupActionClear, "ClearSetups");
  connect(setupActionSave, SIGNAL(triggered()), setupManageMapper, SLOT(map()));
  connect(setupActionCopyToClipboard, SIGNAL(triggered()), setupManageMapper, SLOT(map()));
  connect(setupActionLoadFromString, SIGNAL(triggered()), setupManageMapper, SLOT(map()));
  connect(setupActionClear, SIGNAL(triggered()), setupManageMapper, SLOT(map()));
  connect(setupManageMapper, SIGNAL(mappedString(const QString &)), this,
          SLOT(executeSetupManageMenu(const QString &)));
  setupSubMenuManage->addAction(setupActionSave);
  setupSubMenuManage->addAction(m_setupActionRemove);
  setupSubMenuManage->addAction(setupActionClear);
  setupSubMenuManage->addAction(setupActionCopyToClipboard);
  setupSubMenuManage->addAction(setupActionLoadFromString);
  setupActionManageSetup->setMenu(setupSubMenuManage);
 
  QMenu *setupSubMenuRemove = new QMenu(this);
  m_setupActionRemove->setMenu(setupSubMenuRemove);
  // empty menu for now, so set it disabled to avoid confusing users
  m_setupActionRemove->setEnabled(false);
 
  QSignalMapper *PeakFindingAlgMapper = new QSignalMapper(this);
  PeakFindingAlgMapper->setMapping(setupActionFindPeaks, "FindPeaks");
  PeakFindingAlgMapper->setMapping(setupActionFindPeaksConvolve, "FindPeaksConvolve");
  connect(setupActionFindPeaks, SIGNAL(triggered()), PeakFindingAlgMapper, SLOT(map()));
  connect(setupActionFindPeaksConvolve, SIGNAL(triggered()), PeakFindingAlgMapper, SLOT(map()));
  connect(PeakFindingAlgMapper, SIGNAL(mappedString(const QString &)), this,
          SLOT(executePeakFindingAlgMenu(const QString &)));
 
  QSignalMapper *setupMapper = new QSignalMapper(this);
  setupMapper->setMapping(setupActionClearFit, "ClearFit");
  connect(setupActionClearFit, SIGNAL(triggered()), setupMapper, SLOT(map()));
  connect(setupMapper, SIGNAL(mappedString(const QString &)), this, SLOT(executeSetupMenu(const QString &)));
 
  QMenu *setupSubMenuPeakFindingAgls = new QMenu(this);
  setupSubMenuPeakFindingAgls->addAction(setupActionFindPeaks);
  setupSubMenuPeakFindingAgls->addAction(setupActionFindPeaksConvolve);
  setupActionPeakFindingAlgs->setMenu(setupSubMenuPeakFindingAgls);
 
  setupMenu->addAction(m_setupActionCustomSetup);
  setupMenu->addAction(setupActionManageSetup);
  setupMenu->addSeparator();
  setupMenu->addAction(setupActionPeakFindingAlgs);
  setupMenu->addSeparator();
  setupMenu->addAction(setupActionClearFit);
  btnSetup->setMenu(setupMenu);
 
  updateSetupMenus();
 
  buttonsLayout->addWidget(btnFit, 0, 0);
  buttonsLayout->addWidget(btnDisplay, 0, 1);
  buttonsLayout->addWidget(btnSetup, 0, 2);
 
  m_status = new QLabel("Status:", w);
  m_status->hide();
  connect(this, SIGNAL(fitResultsChanged(const QString &)), this, SLOT(showFitResultStatus(const QString &)),
          Qt::QueuedConnection);
  layout->addWidget(m_status);
  layout->addLayout(buttonsLayout);
  layout->addWidget(m_tip);
  layout->addWidget(m_browser);
  m_browser->setObjectName("tree_browser");
 
  m_workspaceLabel = new QLabel("Workspaces");
  layout->addWidget(m_workspaceLabel);
  m_wsListWidget = new QListWidget();
  layout->addWidget(m_wsListWidget);
  m_workspaceLabel->hide();
  m_wsListWidget->hide();
 
  setWidget(w);
 
  m_browser->setContextMenuPolicy(Qt::CustomContextMenu);
  connect(m_browser, SIGNAL(customContextMenuRequested(const QPoint &)), this, SLOT(popupMenu(const QPoint &)));
  connect(m_browser, SIGNAL(currentItemChanged(const QtBrowserItem *)), this,
          SLOT(currentItemChanged(const QtBrowserItem *)));
  connect(this, SIGNAL(multifitFinished()), this, SLOT(processMultiBGResults()));
 
  connect(m_wsListWidget, SIGNAL(itemDoubleClicked(QListWidgetItem *)), this,
          SLOT(workspaceDoubleClicked(QListWidgetItem *)));
 
  createCompositeFunction();
 
  // Update tooltips when function structure is (or might've been) changed in
  // any way
  connect(this, SIGNAL(functionChanged()), SLOT(updateStructureTooltips()));
  connect(this, SIGNAL(functionChanged()), SLOT(clearFitResultStatus()));
 
  // Update available functions in this fit property browser, when the function
  // factory changes.
  using Mantid::API::FunctionFactory;
  FunctionFactory::Instance().notificationCenter.addObserver(m_updateObserver);
  connect(this, SIGNAL(functionFactoryUpdateReceived()), this, SLOT(populateFunctionNames()));
  FunctionFactory::Instance().enableNotifications();
 
  // Initial call, as function is not changed when it's created for the first
  // time
  updateStructureTooltips();
 
  m_changeSlotsEnabled = true;
 
  populateFunctionNames();
}
 
// Adds the fit result workspaces to the qlistwidget in the browser
void FitPropertyBrowser::addFitResultWorkspacesToTableWidget() {
  const auto outName = outputName();
  const std::vector<std::string> workspaceNames{outName + "_NormalisedCovarianceMatrix", outName + "_Parameters",
                                                outName + "_Workspace"};
 
  for (const auto &name : workspaceNames) {
    // check if already in the list
    auto foundInList = m_wsListWidget->findItems(QString::fromStdString(name), Qt::MatchExactly);
    if (foundInList.size() == 0 && AnalysisDataService::Instance().doesExist(name)) {
      new QListWidgetItem(QString::fromStdString(name), m_wsListWidget);
    }
  }
 
  auto noOfItems = m_wsListWidget->count();
  if (noOfItems != 0 && !m_hideWsListWidget) {
    auto widgetHeight = m_wsListWidget->sizeHintForRow(0) * (noOfItems + 1) + 2 * m_wsListWidget->frameWidth();
    m_wsListWidget->setMaximumHeight(widgetHeight);
    m_workspaceLabel->show();
    m_wsListWidget->show();
  }
}
 
void FitPropertyBrowser::workspaceDoubleClicked(QListWidgetItem *item) {
  auto wsName = item->text();
  emit workspaceClicked(wsName);
}
 
void FitPropertyBrowser::createEditors(QWidget *w) {
  QtCheckBoxFactory *checkBoxFactory = new QtCheckBoxFactory(w);
  QtEnumEditorFactory *comboBoxFactory = new QtEnumEditorFactory(w);
  QtSpinBoxFactory *spinBoxFactory = new QtSpinBoxFactory(w);
  DoubleEditorFactory *doubleEditorFactory = new DoubleEditorFactory(w);
  StringEditorFactory *stringEditFactory = new StringEditorFactory(w);
  FilenameDialogEditorFactory *filenameDialogEditorFactory = new FilenameDialogEditorFactory(w);
  FormulaDialogEditorFactory *formulaDialogEditFactory = new FormulaDialogEditorFactory(w);
 
  m_browser = new QtTreePropertyBrowser();
  m_browser->setFactoryForManager(m_enumManager, comboBoxFactory);
  m_browser->setFactoryForManager(m_boolManager, checkBoxFactory);
  m_browser->setFactoryForManager(m_intManager, spinBoxFactory);
  m_browser->setFactoryForManager(m_doubleManager, doubleEditorFactory);
  m_browser->setFactoryForManager(m_stringManager, stringEditFactory);
  m_browser->setFactoryForManager(m_filenameManager, filenameDialogEditorFactory);
  m_browser->setFactoryForManager(m_formulaManager, formulaDialogEditFactory);
  m_browser->setFactoryForManager(m_columnManager, comboBoxFactory);
  m_browser->setFactoryForManager(m_vectorSizeManager, spinBoxFactory);
  m_browser->setFactoryForManager(m_vectorDoubleManager, doubleEditorFactory);
  m_browser->setFactoryForManager(m_parameterManager, new ParameterEditorFactory(w));
}
 
void FitPropertyBrowser::updateSetupMenus() {
  QMenu *menuLoad = m_setupActionCustomSetup->menu();
  menuLoad->clear();
  QMenu *menuRemove = m_setupActionRemove->menu();
  menuRemove->clear();
 
  QSettings settings;
  settings.beginGroup("Mantid/FitBrowser/SavedFunctions");
  QStringList names = settings.childKeys();
 
  QSignalMapper *mapperLoad = new QSignalMapper(this);
  QSignalMapper *mapperRemove = new QSignalMapper(this);
  // enable actions that open the menus only if there will be >=1 entries in
  // there
  m_setupActionCustomSetup->setEnabled(names.size() >= 1);
  m_setupActionRemove->setEnabled(names.size() >= 1);
  for (int i = 0; i < names.size(); i++) {
    QAction *itemLoad = new QAction(names.at(i), this);
    QAction *itemRemove = new QAction(names.at(i), this);
    mapperLoad->setMapping(itemLoad, names.at(i));
    mapperRemove->setMapping(itemRemove, names.at(i));
    connect(itemLoad, SIGNAL(triggered()), mapperLoad, SLOT(map()));
    connect(itemRemove, SIGNAL(triggered()), mapperRemove, SLOT(map()));
    menuLoad->addAction(itemLoad);
    menuRemove->addAction(itemRemove);
  }
  connect(mapperLoad, SIGNAL(mappedString(const QString &)), this, SLOT(executeCustomSetupLoad(const QString &)));
  connect(mapperRemove, SIGNAL(mappedString(const QString &)), this, SLOT(executeCustomSetupRemove(const QString &)));
}
 
void FitPropertyBrowser::executeCustomSetupLoad(const QString &name) {
  QSettings settings;
  settings.beginGroup("Mantid/FitBrowser/SavedFunctions");
 
  QString str = settings.value(name).toString();
  loadFunction(str);
}
 
void FitPropertyBrowser::executeCustomSetupRemove(const QString &name) {
  QSettings settings;
  settings.beginGroup("Mantid/FitBrowser/SavedFunctions");
 
  QSettingsChangeAware(settings).remove(name);
  updateSetupMenus();
}
 
void FitPropertyBrowser::executeClearCustomSetups() {
  QSettings settings;
  settings.beginGroup("Mantid/FitBrowser/SavedFunctions");
 
  settings.clear();
  updateSetupMenus();
}
 
void FitPropertyBrowser::updateStructureTooltips() {
  // Call tooltip update func on the root handler - it goes down recursively
  getHandler()->updateStructureTooltip();
}
 
void FitPropertyBrowser::executeFitMenu(const QString &item) {
  if (item == "Fit") {
    fit();
  } else if (item == "SeqFit") {
    sequentialFit();
  } else if (item == "UndoFit") {
    undoFit();
  } else if (item == "Evaluate") {
    doFit(0);
  }
}
 
void FitPropertyBrowser::executeDisplayMenu(const QString &item) {
  if (item == "PlotGuess") {
    plotOrRemoveGuessAll();
  } else if (item == "ClearAll") {
    clearAllPlots();
  }
}
 
void FitPropertyBrowser::executePeakFindingAlgMenu(const QString &item) {
  if (item == "FindPeaks")
    findPeaks(std::make_unique<FindPeakDefaultStrategy>());
  if (item == "FindPeaksConvolve")
    findPeaks(std::make_unique<FindPeakConvolveStrategy>());
}
 
void FitPropertyBrowser::executeSetupMenu(const QString &item) {
  if (item == "ClearFit")
    clear();
}
 
void FitPropertyBrowser::executeSetupManageMenu(const QString &item) {
  if (item == "SaveSetup")
    saveFunction();
  if (item == "ClearSetups")
    executeClearCustomSetups();
  if (item == "CopyToClipboard")
    copy();
  if (item == "LoadFromString")
    loadFunctionFromString();
}
 
FitPropertyBrowser::~FitPropertyBrowser() {
  m_compositeFunction.reset();
 
  // remove the FunctionFactory Observer
  using Mantid::API::FunctionFactory;
  FunctionFactory::Instance().notificationCenter.removeObserver(m_updateObserver);
 
  m_browser->unsetFactoryForManager(m_enumManager);
  m_browser->unsetFactoryForManager(m_boolManager);
  m_browser->unsetFactoryForManager(m_intManager);
  m_browser->unsetFactoryForManager(m_doubleManager);
  m_browser->unsetFactoryForManager(m_stringManager);
  m_browser->unsetFactoryForManager(m_filenameManager);
  m_browser->unsetFactoryForManager(m_formulaManager);
  m_browser->unsetFactoryForManager(m_columnManager);
  m_browser->unsetFactoryForManager(m_vectorSizeManager);
  m_browser->unsetFactoryForManager(m_vectorDoubleManager);
  m_browser->unsetFactoryForManager(m_parameterManager);
}
 
PropertyHandler *FitPropertyBrowser::getHandler() const {
  return static_cast<PropertyHandler *>(m_compositeFunction->getHandler());
}
 
PropertyHandler *FitPropertyBrowser::addFunction(const std::string &fnName, bool notify /*= true*/) {
  PropertyHandler *h = getHandler()->addFunction(fnName);
  if (notify) {
    emit functionChanged();
  }
  return h;
}
 
void FitPropertyBrowser::removeFunction(PropertyHandler *handler) {
  if (handler) {
    emit functionRemoved();
    emit functionChanged();
    emit removePlotSignal(getHandler());
    handler->removeFunction();
    compositeFunction()->checkFunction();
  }
}
 
void FitPropertyBrowser::addFunction() {
  QtBrowserItem *ci = m_browser->currentItem();
  // Find the function which has ci as its top browser item
  auto cf = getHandler()->findCompositeFunction(ci);
  if (!cf)
    return;
 
  // Declare new widget for picking fit functions
  m_fitSelector = new SelectFunctionDialog(this);
 
  connect(m_fitSelector, SIGNAL(accepted()), this, SLOT(acceptFit()));
  connect(m_fitSelector, SIGNAL(rejected()), this, SLOT(closeFit()));
  m_fitSelector->show();
}
 
void FitPropertyBrowser::acceptFit() {
  QtBrowserItem *ci = m_browser->currentItem();
  std::shared_ptr<const Mantid::API::CompositeFunction> cf = getHandler()->findCompositeFunction(ci);
  if (!cf)
    return;
  auto function = m_fitSelector->getFunction();
  if (function.isEmpty()) {
    return;
  }
  PropertyHandler *h = getHandler()->findHandler(cf);
  h->addFunction(function.toStdString());
  emit functionChanged();
 
  closeFit();
}
 
void FitPropertyBrowser::closeFit() { m_fitSelector->close(); }
 
void FitPropertyBrowser::createCompositeFunction(const Mantid::API::IFunction_sptr &func) {
  if (m_compositeFunction) {
    emit functionRemoved();
    m_autoBackground = nullptr;
  }
  if (!func) {
    m_compositeFunction.reset(new Mantid::API::CompositeFunction);
  } else {
    auto cf = std::dynamic_pointer_cast<Mantid::API::CompositeFunction>(func);
    if (!cf || (cf->name() != "CompositeFunction" && cf->name() != "MultiBG" && cf->name() != "MultiDomainFunction")) {
      m_compositeFunction.reset(new Mantid::API::CompositeFunction);
      m_compositeFunction->addFunction(func);
    } else {
      m_compositeFunction = cf;
    }
  }
  setWorkspace(m_compositeFunction);
 
  auto h = std::make_unique<PropertyHandler>(m_compositeFunction, Mantid::API::CompositeFunction_sptr(), this);
  m_compositeFunction->setHandler(std::move(h));
  setCurrentFunction(static_cast<PropertyHandler *>(m_compositeFunction->getHandler()));
 
  if (m_auto_back) {
    addAutoBackground();
  }
 
  disableUndo();
  setFitEnabled(m_compositeFunction->nFunctions() > 0);
  emit functionChanged();
}
 
void FitPropertyBrowser::createCompositeFunction(const QString &str) {
  if (str.isEmpty()) {
    createCompositeFunction(Mantid::API::IFunction_sptr());
  } else {
    auto f = tryCreateFitFunction(str);
    if (f) {
      createCompositeFunction(f);
    } else {
      createCompositeFunction(Mantid::API::IFunction_sptr());
    }
  }
}
 
Mantid::API::IFunction_sptr FitPropertyBrowser::tryCreateFitFunction(const QString &str) {
  try {
    return Mantid::API::FunctionFactory::Instance().createInitialized(str.toStdString());
  } catch (const std::exception &ex) {
    QMessageBox::critical(this, "Mantid - Error", "Unexpected exception caught:\n\n" + QString(ex.what()));
    return nullptr;
  }
}
 
void FitPropertyBrowser::popupMenu(const QPoint & /*unused*/) {
  QtBrowserItem *ci = m_browser->currentItem();
  if (!ci)
    return;
  QMenu *menu = new QMenu(this);
  QAction *action;
 
  bool isFunctionsGroup = ci == m_functionsGroup;
  bool isSettingsGroup = ci == m_settingsGroup;
  bool isASetting = ci->parent() == m_settingsGroup;
  bool isFunction = getHandler()->findFunction(ci) != nullptr;
  bool isCompositeFunction = isFunction && getHandler()->findCompositeFunction(ci);
 
  PropertyHandler *h = getHandler()->findHandler(ci->property());
 
  if (isFunctionsGroup) {
    action = new QAction("Add function", this);
    connect(action, SIGNAL(triggered()), this, SLOT(addFunction()));
    menu->addAction(action);
 
    if (m_compositeFunction->name() == "MultiBG" && m_compositeFunction->nFunctions() == 1 &&
        Mantid::API::AnalysisDataService::Instance().doesExist(workspaceName())) {
      action = new QAction("Setup multifit", this);
      connect(action, SIGNAL(triggered()), this, SLOT(setupMultifit()));
      menu->addAction(action);
    }
 
    if (m_peakToolOn) {
      if (h && h->hasPlot()) {
        action = new QAction("Remove plot", this);
        connect(action, SIGNAL(triggered()), this, SLOT(removeGuessAll()));
        menu->addAction(action);
      } else {
        action = new QAction("Plot", this);
        connect(action, SIGNAL(triggered()), this, SLOT(plotGuessAll()));
        menu->addAction(action);
      }
    }
 
    menu->addSeparator();
 
    action = new QAction("Save", this);
    connect(action, SIGNAL(triggered()), this, SLOT(saveFunction()));
    menu->addAction(action);
 
    action = new QAction("Load", this);
    connect(action, SIGNAL(triggered()), this, SLOT(loadFunction()));
    menu->addAction(action);
 
    action = new QAction("Copy To Clipboard", this);
    connect(action, SIGNAL(triggered()), this, SLOT(copy()));
    menu->addAction(action);
 
    menu->addSeparator();
 
    action = new QAction("Help", this);
    connect(action, SIGNAL(triggered()), this, SLOT(browserHelp()));
    menu->addAction(action);
  } else if (isSettingsGroup || isASetting) {
    if (isFitEnabled()) {
      action = new QAction("Fit", this);
      connect(action, SIGNAL(triggered()), this, SLOT(fit()));
      menu->addAction(action);
    }
 
    if (isUndoEnabled()) {
      action = new QAction("Undo Fit", this);
      connect(action, SIGNAL(triggered()), this, SLOT(undoFit()));
      menu->addAction(action);
    }
 
    action = new QAction("Clear all", this);
    connect(action, SIGNAL(triggered()), this, SLOT(clear()));
    menu->addAction(action);
 
    action = new QAction("Help", this);
    connect(action, SIGNAL(triggered()), this, SLOT(browserHelp()));
    menu->addAction(action);
 
  } else if (isFunction) {
    if (isCompositeFunction) {
      action = new QAction("Add function", this);
      connect(action, SIGNAL(triggered()), this, SLOT(addFunction()));
      menu->addAction(action);
    }
 
    action = new QAction("Remove", this);
    connect(action, SIGNAL(triggered()), this, SLOT(deleteFunction()));
    menu->addAction(action);
 
    if (m_peakToolOn) {
      if (h && h->hasPlot()) {
        action = new QAction("Remove plot", this);
        connect(action, SIGNAL(triggered()), this, SLOT(removeGuessCurrent()));
        menu->addAction(action);
      } else {
        action = new QAction("Plot", this);
        connect(action, SIGNAL(triggered()), this, SLOT(plotGuessCurrent()));
        menu->addAction(action);
      }
    }
 
    action = new QAction("Help", this);
    connect(action, SIGNAL(triggered()), this, SLOT(functionHelp()));
    menu->addAction(action);
 
    menu->addSeparator();
  } else if (h) {
    bool isParameter = h->isParameter(ci->property());
    bool isTie = !isParameter && ci->property()->propertyName() == "Tie";
    bool isLowerBound = !isParameter && ci->property()->propertyName() == "Lower Bound";
    bool isUpperBound = !isParameter && ci->property()->propertyName() == "Upper Bound";
    bool isType = isParameter && ci->property()->propertyName() == "Type";
    if (isType) {
      isParameter = false;
    }
    if (isTie) {
      action = new QAction("Remove", this);
      connect(action, SIGNAL(triggered()), this, SLOT(deleteTie()));
      menu->addAction(action);
    } else if (isLowerBound || isUpperBound) {
      action = new QAction("Remove", this);
      connect(action, SIGNAL(triggered()), this, SLOT(removeBounds()));
      menu->addAction(action);
    } else if (count() > 0 && isParameter) {
      bool hasTies;
      bool hasFixes;
      bool hasBounds;
      hasConstraints(ci->property(), hasTies, hasFixes, hasBounds);
 
      if (!hasTies && !hasFixes) {
        QMenu *constraintMenu = menu->addMenu("Constraint");
 
        QMenu *detailMenu = constraintMenu->addMenu("Lower Bound");
 
        action = new QAction("10%", this);
        connect(action, SIGNAL(triggered()), this, SLOT(addLowerBound10()));
        detailMenu->addAction(action);
 
        action = new QAction("50%", this);
        connect(action, SIGNAL(triggered()), this, SLOT(addLowerBound50()));
        detailMenu->addAction(action);
 
        action = new QAction("Custom", this);
        connect(action, SIGNAL(triggered()), this, SLOT(addLowerBound()));
        detailMenu->addAction(action);
        detailMenu = constraintMenu->addMenu("Upper Bound");
 
        action = new QAction("10%", this);
        connect(action, SIGNAL(triggered()), this, SLOT(addUpperBound10()));
        detailMenu->addAction(action);
 
        action = new QAction("50%", this);
        connect(action, SIGNAL(triggered()), this, SLOT(addUpperBound50()));
        detailMenu->addAction(action);
 
        action = new QAction("Custom", this);
        connect(action, SIGNAL(triggered()), this, SLOT(addUpperBound()));
        detailMenu->addAction(action);
        detailMenu = constraintMenu->addMenu("Both Bounds");
 
        action = new QAction("10%", this);
        connect(action, SIGNAL(triggered()), this, SLOT(addBothBounds10()));
        detailMenu->addAction(action);
 
        action = new QAction("50%", this);
        connect(action, SIGNAL(triggered()), this, SLOT(addBothBounds50()));
        detailMenu->addAction(action);
 
        action = new QAction("Custom", this);
        connect(action, SIGNAL(triggered()), this, SLOT(addBothBounds()));
        detailMenu->addAction(action);
      }
 
      if (hasBounds) {
        action = new QAction("Remove constraints", this);
        connect(action, SIGNAL(triggered()), this, SLOT(removeBounds()));
        menu->addAction(action);
      }
 
      if (!hasTies && !hasFixes && !hasBounds) {
        action = new QAction("Fix", this);
        connect(action, SIGNAL(triggered()), this, SLOT(addFixTie()));
        menu->addAction(action);
 
        if (count() == 1) {
          action = new QAction("Tie", this);
          connect(action, SIGNAL(triggered()), this, SLOT(addTie()));
          menu->addAction(action);
        } else {
          QMenu *detail = menu->addMenu("Tie");
 
          action = new QAction("To function", this);
          connect(action, SIGNAL(triggered()), this, SLOT(addTieToFunction()));
          detail->addAction(action);
 
          action = new QAction("Custom Tie", this);
          connect(action, SIGNAL(triggered()), this, SLOT(addTie()));
          detail->addAction(action);
        }
      } else if (hasTies) {
        action = new QAction("Remove tie", this);
        connect(action, SIGNAL(triggered()), this, SLOT(deleteTie()));
        menu->addAction(action);
      } else if (hasFixes) {
        action = new QAction("Remove fix", this);
        connect(action, SIGNAL(triggered()), this, SLOT(deleteTie()));
        menu->addAction(action);
      }
    }
  }
 
  menu->popup(QCursor::pos());
}
 
void FitPropertyBrowser::deleteFunction() {
  const QtBrowserItem *const ci = m_browser->currentItem();
  PropertyHandler *h = getHandler()->findHandler(ci->property());
  removeFunction(h);
}
 
//
 
// Get the default function name
const std::string &FitPropertyBrowser::defaultFunctionType() const { return m_defaultFunction; }
 
// Set the default function name
void FitPropertyBrowser::setDefaultFunctionType(const std::string &fnType) { m_defaultFunction = fnType; }
 
std::string FitPropertyBrowser::defaultPeakType() {
  // If the default peak is not in registered peaks, default to Gaussian
  if (m_registeredPeaks.indexOf(QString::fromStdString(m_defaultPeak)) == -1) {
    g_log.warning("Could not find peak function: '" + m_defaultPeak + "'. Defaulting to Gaussian.");
    setDefaultPeakType("Gaussian");
  }
  return m_defaultPeak;
}
void FitPropertyBrowser::setDefaultPeakType(const std::string &fnType) {
  m_defaultPeak = fnType;
  setDefaultFunctionType(fnType);
}
const std::string &FitPropertyBrowser::defaultBackgroundType() const { return m_defaultBackground; }
void FitPropertyBrowser::setDefaultBackgroundType(const std::string &fnType) {
  m_defaultBackground = fnType;
  setDefaultFunctionType(fnType);
}
 
std::shared_ptr<Mantid::API::Workspace> FitPropertyBrowser::getWorkspace() const {
  std::string wsName = workspaceName();
  if (wsName.empty())
    return std::shared_ptr<Mantid::API::Workspace>();
  try {
    return Mantid::API::AnalysisDataService::Instance().retrieve(wsName);
  } catch (...) {
    return std::shared_ptr<Mantid::API::Workspace>();
  }
}
 
std::string FitPropertyBrowser::workspaceName() const {
  int i = m_enumManager->value(m_workspace);
  std::string res = "";
  if (i >= 0) {
    res = m_workspaceNames[i].toStdString();
  }
  return res;
}
 
void FitPropertyBrowser::setWorkspaceName(const QString &wsName) {
  int i = static_cast<int>(m_workspaceNames.indexOf(wsName));
  if (i < 0) {
    // workspace may not be found because add notification hasn't been
    // processed yet
    populateWorkspaceNames();
    i = static_cast<int>(m_workspaceNames.indexOf(wsName));
  }
  if (i >= 0) {
    m_enumManager->setValue(m_workspace, i);
    Mantid::API::MatrixWorkspace_sptr mws;
    try {
      mws = std::dynamic_pointer_cast<Mantid::API::MatrixWorkspace>(
          Mantid::API::AnalysisDataService::Instance().retrieve(wsName.toStdString()));
    } catch (Mantid::Kernel::Exception::NotFoundError &) {
    }
    if (mws) {
      auto wi = static_cast<size_t>(workspaceIndex());
      if (wi < mws->getNumberHistograms() && !mws->x(wi).empty()) {
        setStartX(mws->x(wi).front());
        setEndX(mws->x(wi).back());
      }
    }
  }
  setWorkspaceIndex(0);
}
 
int FitPropertyBrowser::workspaceIndex() const { return m_intManager->value(m_workspaceIndex); }
 
void FitPropertyBrowser::setWorkspaceIndex(int i) {
  try {
    auto const index = getAllowedIndex(i);
    m_intManager->setValue(m_workspaceIndex, index);
  } catch (Mantid::Kernel::Exception::NotFoundError &) {
    // ignore this error
  }
}
 
std::string FitPropertyBrowser::outputName() const { return m_stringManager->value(m_output).toStdString(); }
 
void FitPropertyBrowser::setOutputName(const std::string &name) {
  m_stringManager->setValue(m_output, QString::fromStdString(name));
}
 
std::string FitPropertyBrowser::minimizer(bool withProperties) const {
  int i = m_enumManager->value(m_minimizer);
  QString minimStr = m_minimizers[i];
  // append minimizer properties as name=value pairs
  if (withProperties) {
    for (const QtProperty *const prop : m_minimizerProperties) {
      if (prop->propertyManager() == m_stringManager) {
        QString value = m_stringManager->value(prop);
        if (!value.isEmpty()) {
          minimStr += "," + prop->propertyName() + "=" + value;
        }
      } else {
        minimStr += "," + prop->propertyName() + "=";
        if (prop->propertyManager() == m_intManager) {
          minimStr += QString::number(m_intManager->value(prop));
        } else if (prop->propertyManager() == m_doubleManager) {
          minimStr += QString::number(m_doubleManager->value(prop));
        } else if (prop->propertyManager() == m_boolManager) {
          minimStr += QString::number(m_boolManager->value(prop));
        } else {
          throw std::runtime_error("The fit browser doesn't support the type "
                                   "of minimizer's property " +
                                   prop->propertyName().toStdString());
        }
      }
    }
  }
  return minimStr.toStdString();
}
 
bool FitPropertyBrowser::ignoreInvalidData() const { return m_boolManager->value(m_ignoreInvalidData); }
 
void FitPropertyBrowser::setIgnoreInvalidData(bool on) { m_boolManager->setValue(m_ignoreInvalidData, on); }
 
std::string FitPropertyBrowser::costFunction() const {
  int i = m_enumManager->value(m_costFunction);
  return m_costFunctions[i].toStdString();
}
 
bool FitPropertyBrowser::convolveMembers() const { return m_boolManager->value(m_convolveMembers); }
 
bool FitPropertyBrowser::isHistogramFit() const {
  if (!m_evaluationType->isEnabled()) {
    return false;
  }
  int i = m_enumManager->value(m_evaluationType);
  return m_evaluationTypes[i].toStdString() == "Histogram";
}
 
int FitPropertyBrowser::maxIterations() const { return m_intManager->value(m_maxIterations); }
 
int FitPropertyBrowser::getPeakRadius() const { return m_intManager->value(m_peakRadius); }
 
std::string FitPropertyBrowser::getExcludeRange() const {
  return m_stringManager->value(m_excludeRange).QString::toStdString();
}
 
void FitPropertyBrowser::populateFunctionNames() {
  const std::vector<std::string> names = Mantid::API::FunctionFactory::Instance().getFunctionNamesGUI();
  m_registeredFunctions.clear();
  m_registeredPeaks.clear();
  m_registeredBackgrounds.clear();
  m_registeredOther.clear();
 
  const auto &functionFactory = Mantid::API::FunctionFactory::Instance();
  for (const auto &fnName : names) {
    if (fnName == "MultiBG")
      continue;
    Mantid::API::IFunction_sptr function;
    try {
      function = functionFactory.createFunction(fnName);
    } catch (std::exception &exc) {
      g_log.warning() << "Unable to create " << fnName << ": " << exc.what() << "\n";
      continue;
    }
    QString qfnName = QString::fromStdString(fnName);
    m_registeredFunctions << qfnName;
    if (dynamic_cast<Mantid::API::IPeakFunction *>(function.get())) {
      m_registeredPeaks << qfnName;
    } else if (dynamic_cast<Mantid::API::IBackgroundFunction *>(function.get())) {
      m_registeredBackgrounds << qfnName;
    } else {
      m_registeredOther << qfnName;
    }
  }
}
 
void FitPropertyBrowser::enumChanged(QtProperty *prop) {
  if (!m_changeSlotsEnabled)
    return;
 
  bool storeSettings = false;
  if (prop == m_workspace) {
    workspaceChange(QString::fromStdString(workspaceName()));
    setWorkspaceProperties();
    intChanged(m_workspaceIndex);
    m_storedWorkspaceName = workspaceName();
  } else if (prop->propertyName() == "Type") {
    disableUndo();
    PropertyHandler *h = getHandler()->findHandler(prop);
    if (!h)
      return;
    // if (!h->parentHandler()) return;
    auto f = h->changeType(prop);
    if (!h->parentHandler()) {
      m_compositeFunction = std::dynamic_pointer_cast<Mantid::API::CompositeFunction>(f);
    }
    if (f)
      setCurrentFunction(f);
    emit functionChanged();
 
  } else if (prop == m_minimizer) {
    minimizerChanged();
  } else if (prop == m_evaluationType) {
    storeSettings = true;
  }
 
  if (storeSettings) {
    QSettings settings;
    settings.beginGroup("Mantid/FitBrowser");
    auto val = m_enumManager->value(prop);
    QSettingsChangeAware(settings).setValue(prop->propertyName(), val);
  }
}
 
void FitPropertyBrowser::boolChanged(QtProperty *prop) {
  if (!m_changeSlotsEnabled)
    return;
 
  if (prop == m_plotDiff || prop == m_plotCompositeMembers || prop == m_ignoreInvalidData ||
      prop == m_showParamErrors) {
    bool val = m_boolManager->value(prop);
 
    QSettings settings;
    settings.beginGroup("Mantid/FitBrowser");
    QSettingsChangeAware(settings).setValue(prop->propertyName(), val);
 
    if (prop == m_showParamErrors) {
      m_parameterManager->setErrorsEnabled(val);
      emit errorsEnabled(val);
    }
  } else { // it could be an attribute
    PropertyHandler *h = getHandler()->findHandler(prop);
    if (!h)
      return;
    enactAttributeChange(prop, h);
  }
}
 
void FitPropertyBrowser::intChanged(QtProperty *prop) {
  if (!m_changeSlotsEnabled)
    return;
 
  if (prop == m_workspaceIndex) {
    // Get current value displayed by the workspace index spinbox
    auto const currentIndex = workspaceIndex();
    auto const allowedIndex = getAllowedIndex(currentIndex);
    if (allowedIndex != currentIndex) {
      setWorkspaceIndex(allowedIndex);
      emit workspaceIndexChanged(allowedIndex);
    }
    m_oldWorkspaceIndex = allowedIndex;
  } else if (prop->propertyName() == "Workspace Index") {
    // Property field from Settings. Note the white space.
    PropertyHandler *h = getHandler()->findHandler(prop);
    if (!h)
      return;
    h->setFunctionWorkspace();
  } else if (prop->propertyName() == "WorkspaceIndex") {
    // Property field from functions. In a word.
    PropertyHandler *h = getHandler()->findHandler(prop);
    auto const index = prop->valueText().toInt();
    if (h) {
      h->setAttribute(prop);
      setWorkspaceIndex(index);
      emit workspaceIndexChanged(index);
      emit updatePlotSpectrum(index);
    }
  } else if (prop == m_maxIterations || prop == m_peakRadius) {
    QSettings settings;
    settings.beginGroup("Mantid/FitBrowser");
    int val = m_intManager->value(prop);
    QSettingsChangeAware(settings).setValue(prop->propertyName(), val);
    if (prop == m_peakRadius) {
      sendParameterChanged(m_compositeFunction.get());
    }
  } else { // it could be an attribute
    PropertyHandler *h = getHandler()->findHandler(prop);
    if (!h)
      return;
    enactAttributeChange(prop, h);
  }
}
 
void FitPropertyBrowser::doubleChanged(QtProperty *prop) {
  if (!m_changeSlotsEnabled)
    return;
 
  double value = m_doubleManager->value(prop);
  if (prop == m_startX) {
    // call setWorkspace to change maxX in functions
    setWorkspace(m_compositeFunction);
    m_doubleManager->setMinimum(m_endX, value);
    getHandler()->setAttribute("StartX", value);
    emit startXChanged(startX());
    emit xRangeChanged(startX(), endX());
    return;
  } else if (prop == m_endX) {
    // call setWorkspace to change minX in functions
    setWorkspace(m_compositeFunction);
    m_doubleManager->setMaximum(m_startX, value);
    getHandler()->setAttribute("EndX", value);
    emit endXChanged(endX());
    emit xRangeChanged(startX(), endX());
    return;
  } else { // check if it is a constraint
    PropertyHandler *h = getHandler()->findHandler(prop);
    if (!h)
      return;
 
    QtProperty *parProp = h->getParameterProperty(prop);
    if (parProp) {
      if (prop->propertyName() == "LowerBound") {
        double loBound = m_doubleManager->value(prop);
        h->addConstraint(parProp, true, false, loBound, 0);
      } else if (prop->propertyName() == "UpperBound") {
        double upBound = m_doubleManager->value(prop);
        h->addConstraint(parProp, false, true, 0, upBound);
      }
    } else { // it could be an attribute
      enactAttributeChange(prop, h);
    }
  }
}
 
void FitPropertyBrowser::enactAttributeChange(QtProperty *prop, PropertyHandler *h, const bool vectorAttribute) {
  try {
    if (vectorAttribute) {
      h->setVectorAttribute(prop);
    } else {
      h->setAttribute(prop);
    }
  } catch (IFunction::ValidationException &ve) {
    std::stringstream err_str;
    err_str << prop->propertyName().toStdString() << " - " << ve.what();
    g_log.warning(err_str.str());
  }
}
 
void FitPropertyBrowser::parameterChanged(QtProperty *prop) {
  if (!m_changeSlotsEnabled)
    return;
 
  getHandler()->setParameter(prop);
}
 
void FitPropertyBrowser::stringChanged(QtProperty *prop) {
  if (!m_changeSlotsEnabled)
    return;
 
  if (prop == m_output) {
    std::string oName = outputName();
    if (oName.find_first_not_of(' ') == std::string::npos) {
      setOutputName("");
    } else if (workspaceName() == oName || oName.empty()) {
      m_guessOutputName = true;
    } else {
      m_guessOutputName = false;
    }
  } else if (prop->propertyName() == "Tie") {
    PropertyHandler *h = getHandler()->findHandler(prop);
    if (!h)
      return;
 
    const QtProperty *const parProp = h->getParameterProperty(prop);
    if (!parProp)
      return;
 
    const QString parName = h->functionPrefix() + "." + parProp->propertyName();
 
    const auto oldExp = getOldExpressionAsString(parName);
    const auto exp = m_stringManager->value(prop);
 
    if (oldExp == exp)
      return;
 
    try {
      compositeFunction().get()->tie(parName.toStdString(), exp.toStdString());
      h->addTie(parName + "=" + exp);
    } catch (...) {
      const auto msg =
          "Failed to update tie on " + parName.toStdString() + ". Expression " + exp.toStdString() + " is invalid.";
      QMessageBox::critical(this, "Mantid - Error", msg.c_str());
 
      m_stringManager->setValue(prop, oldExp);
    }
  } else if (getHandler()->setAttribute(prop)) { // setting an attribute may
                                                 // change function parameters
    emit functionChanged();
    return;
  }
}
 
QString FitPropertyBrowser::getOldExpressionAsString(const QString &parameterName) const {
  // Note this only finds the oldTie if it was a tie to a function (e.g. f0.Height=f1.Height)
  // but not if it was a custom tie (e.g. f0.Height=2.0)
  QString oldExp;
  size_t parIndex;
  try {
    parIndex = compositeFunction()->parameterIndex(parameterName.toStdString());
  } catch (std::exception &) {
    return "";
  }
  const auto oldTie = compositeFunction()->getTie(parIndex);
  if (oldTie) {
    const auto oldTieStr = oldTie->asString();
    oldExp = QString::fromStdString(oldTieStr.substr(oldTieStr.find("=") + 1));
  } else {
    oldExp = "";
  }
  return oldExp;
}
 
void FitPropertyBrowser::filenameChanged(QtProperty *prop) {
  if (!m_changeSlotsEnabled)
    return;
 
  if (getHandler()->setAttribute(prop)) {
    return;
  }
}
// Centre of the current peak
double FitPropertyBrowser::centre() const {
  if (m_currentHandler && m_currentHandler->pfun()) {
    return m_currentHandler->pfun()->centre();
  }
  return 0;
}
 
void FitPropertyBrowser::setCentre(double value) {
  if (m_currentHandler) {
    m_currentHandler->setCentre(value);
    m_currentHandler->updateParameters();
    emit parameterChanged(m_currentHandler->function().get());
  }
}
 
// Height of the current peak
double FitPropertyBrowser::height() const {
  if (m_currentHandler && m_currentHandler->pfun()) {
    return m_currentHandler->pfun()->height();
  }
  return 0.;
}
 
void FitPropertyBrowser::setHeight(double value) {
  if (m_currentHandler) {
    m_currentHandler->setHeight(value);
    m_currentHandler->updateParameters();
    emit parameterChanged(m_currentHandler->function().get());
  }
}
 
// Width of the current peak
double FitPropertyBrowser::fwhm() const {
  if (m_currentHandler && m_currentHandler->pfun()) {
    return m_currentHandler->pfun()->fwhm();
  }
  return 0;
}
 
void FitPropertyBrowser::setFwhm(double value) {
  if (m_currentHandler) {
    m_currentHandler->setFwhm(value);
    m_currentHandler->updateParameters();
    emit parameterChanged(m_currentHandler->function().get());
  }
}
 
int FitPropertyBrowser::count() const { return static_cast<int>(m_compositeFunction->nFunctions()); }
 
PropertyHandler *FitPropertyBrowser::currentHandler() const { return m_currentHandler; }
 
void FitPropertyBrowser::setCurrentFunction(PropertyHandler *h) const {
  m_currentHandler = h;
  if (m_currentHandler) {
    m_browser->setCurrentItem(m_currentHandler->item());
    emit currentChanged();
  }
}
 
void FitPropertyBrowser::setCurrentFunction(const Mantid::API::IFunction_const_sptr &f) const {
  setCurrentFunction(getHandler()->findHandler(f));
}
 
void FitPropertyBrowser::doFit(int maxIterations) {
  const std::string wsName = workspaceName();
 
  if (wsName.empty()) {
    QMessageBox::critical(this, "Mantid - Error", "Workspace name is not set");
    return;
  }
 
  const auto ws = getWorkspace();
  if (!ws) {
    return;
  }
 
  try {
    emit algorithmStarted(QString::fromStdString(wsName));
    m_initialParameters.resize(compositeFunction()->nParams());
    for (size_t i = 0; i < compositeFunction()->nParams(); i++) {
      m_initialParameters[i] = compositeFunction()->getParameter(i);
    }
    m_fitActionUndoFit->setEnabled(true);
 
    Mantid::API::IAlgorithm_sptr alg = Mantid::API::AlgorithmManager::Instance().create("Fit");
    alg->initialize();
    if (isHistogramFit()) {
      alg->setProperty("EvaluationType", "Histogram");
    }
    alg->setProperty("Function", std::dynamic_pointer_cast<Mantid::API::IFunction>(compositeFunction())->clone());
    alg->setProperty("InputWorkspace", ws);
    auto tbl = std::dynamic_pointer_cast<ITableWorkspace>(ws);
    if (!tbl) {
      alg->setProperty("WorkspaceIndex", workspaceIndex());
    } else {
      alg->setPropertyValue("XColumn", getXColumnName().toStdString());
      alg->setPropertyValue("YColumn", getYColumnName().toStdString());
      if (getErrColumnName().toStdString() != "")
        alg->setPropertyValue("ErrColumn", getErrColumnName().toStdString());
    }
    alg->setProperty("StartX", startX());
    alg->setProperty("EndX", endX());
    alg->setPropertyValue("Output", outputName());
    alg->setPropertyValue("Minimizer", minimizer(true));
    alg->setProperty("IgnoreInvalidData", ignoreInvalidData());
    alg->setPropertyValue("CostFunction", costFunction());
    alg->setProperty("MaxIterations", maxIterations);
    alg->setProperty("PeakRadius", getPeakRadius());
    if (!isHistogramFit()) {
      if (!tbl) {
        alg->setProperty("Normalise", m_shouldBeNormalised);
      }
      // Always output each composite function but not necessarily plot it
      alg->setProperty("OutputCompositeMembers", true);
      if (alg->existsProperty("ConvolveMembers")) {
        alg->setProperty("ConvolveMembers", convolveMembers());
      }
    }
    if (!getExcludeRange().empty()) {
      if (alg->getPropertyValue("EvaluationType") != "Histogram")
        alg->setProperty("Exclude", getExcludeRange());
      else {
        g_log.warning("Exclude property not avaliable when evaluating as a histogram.");
      }
    }
    observeFinish(alg);
    Poco::ActiveResult<bool> result(alg->executeAsync());
    while (!result.available()) {
      QCoreApplication::processEvents();
    }
    m_fitAlgParameters = alg->toString();
    if (!result.error().empty()) {
      emit algorithmFailed();
    }
  } catch (const std::exception &e) {
    QString msg = "Fit algorithm failed.\n\n" + QString(e.what()) + "\n";
    QMessageBox::critical(this, "Mantid - Error", msg);
  }
}
 
Mantid::API::IFunction_sptr FitPropertyBrowser::getFittingFunction() const {
  Mantid::API::IFunction_sptr function;
  if (m_compositeFunction->nFunctions() > 1) {
    function = m_compositeFunction;
  } else {
    function = getFunctionAtIndex(0);
  }
  return function;
}
 
Mantid::API::IFunction_sptr FitPropertyBrowser::getFunctionAtIndex(std::size_t const &index) const {
  return m_compositeFunction->getFunction(index);
}
 
void FitPropertyBrowser::finishHandle(const Mantid::API::IAlgorithm *alg) {
  // Emit a signal to show that the fitting has completed. (workspaceNames that
  // the fit has been done against is sent as a parameter)
  QString name(QString::fromStdString(alg->getProperty("InputWorkspace")));
  if (name.contains('_')) // Must be fitting to raw data, need to group under
    // name without "_Raw".
    emit fittingDone(name.left(name.indexOf('_')));
  else // else fitting to current workspace, group under same name.
    emit fittingDone(name);
 
  IFunction_sptr function = alg->getProperty("Function");
  updateBrowserFromFitResults(function);
  if (alg->existsProperty("OutputWorkspace")) {
    std::string out = alg->getProperty("OutputWorkspace");
    emit algorithmFinished(QString::fromStdString(out));
  }
  // Update Status string in member variable (so can be retrieved)
  m_fitAlgOutputStatus = alg->getPropertyValue("OutputStatus");
  auto status = QString::fromStdString(m_fitAlgOutputStatus);
  emit fitResultsChanged(status);
  // update Quality string
  if (m_displayActionQuality->isChecked()) {
    double quality = alg->getProperty("OutputChi2overDoF");
    std::string costFunctionStr = alg->getProperty("CostFunction");
    std::shared_ptr<Mantid::API::ICostFunction> costfun =
        Mantid::API::CostFunctionFactory::Instance().create(costFunctionStr);
    status = (status == "success") ? "success" : "failed";
    emit changeWindowTitle(QString("Fit Function (") + costfun->shortName().c_str() + " = " + QString::number(quality) +
                           ", " + status + ")");
  } else
    emit changeWindowTitle("Fit Function");
  if (m_compositeFunction->name() == "MultiBG") {
    emit multifitFinished();
  }
}
 
std::string FitPropertyBrowser::getFunctionString() const {
  auto function = getFittingFunction();
  return function->asString();
}
 
void FitPropertyBrowser::showFitResultStatus(const QString &status) {
  auto text(status);
  text.replace("\n", "<br>");
  QString color("green");
  if (status != "success") {
    color = "red";
  }
 
  m_status->setText(QString("Status: <span style='color:%2'>%1</span>").arg(text, color));
  m_status->show();
}
 
void FitPropertyBrowser::clearFitResultStatus() {
  m_status->setText("Status:");
  m_status->hide();
}
 
void FitPropertyBrowser::populateWorkspaceNames() {
  m_workspaceNames.clear();
  if (m_allowedTableWorkspace.isEmpty()) {
    bool allAreAllowed = m_allowedSpectra.isEmpty();
    QStringList allowedNames;
    auto wsList = Mantid::API::AnalysisDataService::Instance().getObjectNames();
    for (const auto &wsName : wsList) {
      auto const &name = QString::fromStdString(wsName);
      if (allAreAllowed || m_allowedSpectra.contains(name)) {
        allowedNames << name;
      }
    }
 
    for (const auto &name : allowedNames) {
      Mantid::API::Workspace_sptr ws = Mantid::API::AnalysisDataService::Instance().retrieve(name.toStdString());
      if (isWorkspaceValid(ws)) {
        m_workspaceNames.append(name);
      }
    }
  } else {
    m_workspaceNames.append(m_allowedTableWorkspace);
  }
  m_enumManager->setEnumNames(m_workspace, m_workspaceNames);
  setWorkspaceIndex(0);
}
 
void FitPropertyBrowser::showEvent(QShowEvent *e) {
  (void)e;
  // Observe what workspaces are added and deleted unless it's a custom
  // fitting, all workspaces for custom fitting (eg muon analysis) should be
  // manually added.
  setADSObserveEnabled(true);
  populateWorkspaceNames();
}
 
void FitPropertyBrowser::hideEvent(QHideEvent *e) {
  (void)e;
  setADSObserveEnabled(false);
}
 
void FitPropertyBrowser::setADSObserveEnabled(bool enabled) {
  observeAdd(enabled);
  observePostDelete(enabled);
  observeRename(enabled);
}
 
void FitPropertyBrowser::addHandle(const std::string &wsName, const std::shared_ptr<Mantid::API::Workspace> &ws) {
  auto const qName = QString::fromStdString(wsName);
  if (!isWorkspaceValid(ws) ||
      (!m_allowedSpectra.isEmpty() && !m_allowedSpectra.contains(qName) && m_allowedTableWorkspace.isEmpty()))
    return;
  QString oldName = QString::fromStdString(workspaceName());
  int i = static_cast<int>(m_workspaceNames.indexOf(qName));
 
  bool initialSignalsBlocked = m_enumManager->signalsBlocked();
 
  // if new workspace append this workspace name
  if (i < 0) {
    if (!m_workspaceNames.isEmpty()) {
      m_enumManager->blockSignals(true);
    }
 
    m_workspaceNames.append(qName);
    m_workspaceNames.sort();
    m_enumManager->setEnumNames(m_workspace, m_workspaceNames);
  }
  // get hold of index of oldName
  i = static_cast<int>(m_workspaceNames.indexOf(oldName));
  if (i >= 0) {
    m_enumManager->setValue(m_workspace, i);
  }
 
  m_enumManager->blockSignals(initialSignalsBlocked);
}
 
void FitPropertyBrowser::postDeleteHandle(const std::string &wsName) { removeWorkspace(wsName); }
 
void FitPropertyBrowser::removeWorkspace(const std::string &wsName) {
  QString oldName = QString::fromStdString(workspaceName());
  int iName = static_cast<int>(m_workspaceNames.indexOf(QString(wsName.c_str())));
  if (iName >= 0) {
    m_workspaceNames.removeAt(iName);
  }
 
  bool initialSignalsBlocked = m_enumManager->signalsBlocked();
 
  if (QString::fromStdString(wsName) != oldName) {
    m_enumManager->blockSignals(true);
  }
 
  m_enumManager->setEnumNames(m_workspace, m_workspaceNames);
 
  iName = static_cast<int>(m_workspaceNames.indexOf(oldName));
  if (iName >= 0) {
    m_enumManager->setValue(m_workspace, iName);
  }
 
  m_enumManager->blockSignals(initialSignalsBlocked);
 
  for (auto i = 0; i < m_wsListWidget->count(); ++i) {
    auto item = m_wsListWidget->item(i);
    if (item->text().toStdString() == wsName) {
      m_wsListWidget->takeItem(m_wsListWidget->row(item));
    }
  }
 
  if (m_wsListWidget->count() == 0) {
    m_wsListWidget->hide();
    m_workspaceLabel->hide();
  }
}
 
void FitPropertyBrowser::renameHandle(const std::string &oldName, const std::string &newName) {
  QString oldNameQ = QString::fromStdString(oldName);
  QString newNameQ = QString::fromStdString(newName);
  auto it = m_allowedSpectra.find(oldNameQ);
  if (it != m_allowedSpectra.end()) {
    auto indices = m_allowedSpectra.value(oldNameQ);
    m_allowedSpectra.remove(oldNameQ);
    m_allowedSpectra.insert(newNameQ, indices);
  }
  int iWorkspace = static_cast<int>(m_workspaceNames.indexOf(oldNameQ));
  if (iWorkspace >= 0) {
    m_workspaceNames.replace(iWorkspace, newNameQ);
    m_enumManager->setEnumNames(m_workspace, m_workspaceNames);
  }
  workspaceChange(newNameQ);
 
  for (auto i = 0; i < m_wsListWidget->count(); ++i) {
    auto item = m_wsListWidget->item(i);
    if (item->text().toStdString() == oldName) {
      m_wsListWidget->takeItem(m_wsListWidget->row(item));
      m_wsListWidget->insertItem(m_wsListWidget->row(item), newNameQ);
    }
  }
}
 
bool FitPropertyBrowser::isWorkspaceValid(Mantid::API::Workspace_sptr ws) const {
  return (dynamic_cast<Mantid::API::MatrixWorkspace *>(ws.get()) != nullptr ||
          dynamic_cast<Mantid::API::ITableWorkspace *>(ws.get()) != nullptr);
}
 
bool FitPropertyBrowser::isPeak() const {
  if (count() == 0) {
    return false;
  }
  return m_currentHandler && m_currentHandler->pfun();
}
 
double FitPropertyBrowser::startX() const { return m_doubleManager->value(m_startX); }
 
void FitPropertyBrowser::setStartX(double value) { m_doubleManager->setValue(m_startX, value); }
 
double FitPropertyBrowser::endX() const { return m_doubleManager->value(m_endX); }
 
void FitPropertyBrowser::setEndX(double value) { m_doubleManager->setValue(m_endX, value); }
 
void FitPropertyBrowser::setXRange(double start, double end) {
  disconnect(m_doubleManager, SIGNAL(propertyChanged(QtProperty *)), this, SLOT(doubleChanged(QtProperty *)));
 
  m_doubleManager->setValue(m_startX, start);
  m_doubleManager->setValue(m_endX, end);
 
  setWorkspace(m_compositeFunction);
  m_doubleManager->setMinimum(m_endX, start);
  m_doubleManager->setMaximum(m_startX, end);
 
  getHandler()->setAttribute("StartX", start);
  getHandler()->setAttribute("EndX", end);
 
  connect(m_doubleManager, SIGNAL(propertyChanged(QtProperty *)), this, SLOT(doubleChanged(QtProperty *)));
}
 
QList<double> FitPropertyBrowser::getXRange() {
  auto ws = getWorkspace();
  auto tbl = std::dynamic_pointer_cast<ITableWorkspace>(ws);
  auto mws = std::dynamic_pointer_cast<MatrixWorkspace>(ws);
  QList<double> range;
  if (tbl) {
    auto xColumnIndex = m_columnManager->value(m_xColumn);
    std::vector<double> xColumnData;
    auto col = tbl->getColumn(xColumnIndex);
    try {
      for (size_t i = 0; i < tbl->rowCount(); ++i) {
        xColumnData.emplace_back(col->toDouble(i));
      }
    } catch (std::invalid_argument &err) {
      QMessageBox::critical(this, "Mantid - Error", "The X column is not a number");
      throw std::invalid_argument(err);
    }
    std::sort(xColumnData.begin(), xColumnData.end());
    range.push_back(xColumnData.front());
    range.push_back(xColumnData.back());
  } else if (mws) {
    auto xData = mws->mutableX(workspaceIndex());
    range.push_back(xData.front());
    range.push_back(xData.back());
  }
  return range;
}
 
QString FitPropertyBrowser::getXColumnName() const {
  const auto ws = getWorkspace();
  auto tbl = std::dynamic_pointer_cast<ITableWorkspace>(ws);
  QString columnName = "";
  if (tbl) {
    auto columns = tbl->getColumnNames();
    auto xIndex = m_columnManager->value(m_xColumn);
    if (xIndex >= static_cast<int>(columns.size())) {
      QMessageBox::critical(nullptr, "Mantid - Error", "X column was not found.");
    }
    columnName = QString::fromStdString(columns[xIndex]);
  }
  return columnName;
}
 
QString FitPropertyBrowser::getYColumnName() const {
  const auto ws = getWorkspace();
  auto tbl = std::dynamic_pointer_cast<ITableWorkspace>(ws);
  QString columnName = "";
  if (tbl) {
    auto columns = tbl->getColumnNames();
    auto yIndex = m_columnManager->value(m_yColumn);
    if (yIndex >= static_cast<int>(columns.size())) {
      QMessageBox::critical(nullptr, "Mantid - Error", "Y column was not found.");
    }
    columnName = QString::fromStdString(columns[yIndex]);
  }
  return columnName;
}
 
QString FitPropertyBrowser::getErrColumnName() const {
  const auto ws = getWorkspace();
  auto tbl = std::dynamic_pointer_cast<ITableWorkspace>(ws);
  QString columnName = "";
  if (tbl) {
    auto columns = tbl->getColumnNames();
    // The error column has an empty first entry
    auto errIndex = m_columnManager->value(m_errColumn) - 1;
    if (errIndex >= static_cast<int>(columns.size())) {
      QMessageBox::warning(nullptr, "Mantid - Warning", "Error column was not found.");
    } else if (errIndex != -1) {
      columnName = QString::fromStdString(columns[errIndex]);
    }
  }
  return columnName;
}
 
QtBrowserItem *FitPropertyBrowser::findItem(QtBrowserItem *parent, QtProperty *prop) const {
  QList<QtBrowserItem *> children = parent->children();
  QtBrowserItem *res = nullptr;
  for (auto &child : children) {
    if (child->property() == prop) {
      return child;
    }
    QList<QtBrowserItem *> grand_children = child->children();
    if (grand_children.size() > 0)
      res = findItem(child, prop);
    if (res)
      return res;
  }
  return nullptr;
}
 
void FitPropertyBrowser::currentItemChanged(const QtBrowserItem *current) {
  if (current) {
    m_currentHandler = getHandler()->findHandler(current->property());
  } else {
    m_currentHandler = nullptr;
  }
  emit currentChanged();
}
 
void FitPropertyBrowser::vectorDoubleChanged(QtProperty *prop) {
  PropertyHandler *h = getHandler()->findHandler(prop);
  if (!h)
    return;
  enactAttributeChange(prop, h, true);
}
 
void FitPropertyBrowser::vectorSizeChanged(QtProperty *prop) {
  PropertyHandler *h = getHandler()->findHandler(prop);
  if (!h)
    return;
  enactAttributeChange(prop, h, true);
}
 
void FitPropertyBrowser::updateParameters() { getHandler()->updateParameters(); }
 
void FitPropertyBrowser::updateAttributes() { getHandler()->updateAttributes(); }
 
void FitPropertyBrowser::clear() {
  getHandler()->removeAllPlots();
  clearBrowser();
  createCompositeFunction();
  emit functionCleared();
}
 
void FitPropertyBrowser::clearBrowser() {
  QList<QtProperty *> props = m_functionsGroup->property()->subProperties();
  for (QtProperty *prop : props) {
    m_functionsGroup->property()->removeSubProperty(prop);
  }
}
 
void FitPropertyBrowser::updateBrowserFromFitResults(const IFunction_sptr &finalFunction) {
  for (auto paramIndex = 0u; paramIndex < finalFunction->nParams(); ++paramIndex) {
    compositeFunction()->setParameter(paramIndex, finalFunction->getParameter(paramIndex));
    compositeFunction()->setError(paramIndex, finalFunction->getError(paramIndex));
  }
  updateParameters();
  getHandler()->updateErrors();
}
 
void FitPropertyBrowser::undoFit() {
  if (m_initialParameters.size() == compositeFunction()->nParams()) {
    for (size_t i = 0; i < compositeFunction()->nParams(); i++) {
      compositeFunction()->setParameter(i, m_initialParameters[i]);
    }
    clearFitResultStatus();
    updateParameters();
    getHandler()->clearErrors();
    emit fitUndone();
  }
  disableUndo();
}
 
void FitPropertyBrowser::disableUndo() {
  m_initialParameters.clear();
  m_fitActionUndoFit->setEnabled(false);
}
 
bool FitPropertyBrowser::isUndoEnabled() const {
  return m_initialParameters.size() && compositeFunction()->nParams() == m_initialParameters.size();
}
 
void FitPropertyBrowser::setFitEnabled(bool enable) {
  m_fitActionFit->setEnabled(enable);
  m_fitActionSeqFit->setEnabled(enable);
}
 
bool FitPropertyBrowser::isFitEnabled() const { return m_fitActionFit->isEnabled(); }
 
void FitPropertyBrowser::addTie() {
  QtBrowserItem *ci = m_browser->currentItem();
  QtProperty *paramProp = ci->property();
  PropertyHandler *h = getHandler()->findHandler(paramProp);
  if (!h)
    return;
  if (!h->isParameter(paramProp))
    return;
 
  auto f = h->function();
  if (!f)
    return;
 
  bool ok = false;
  QString tieStr = QInputDialog::getText(this, "Mantid - Fit", "Enter tie expression", QLineEdit::Normal, "", &ok);
  if (ok) {
    tieStr = tieStr.trimmed();
    if (!tieStr.contains('=')) {
      tieStr = h->functionPrefix() + "." + paramProp->propertyName() + "=" + tieStr;
    }
    h->addTie(tieStr);
  } // if (ok)
}
 
void FitPropertyBrowser::addTieToFunction() {
  QtBrowserItem *ci = m_browser->currentItem();
  QtProperty *paramProp = ci->property();
  PropertyHandler *h = getHandler()->findHandler(paramProp);
  if (!h)
    return;
  if (!h->isParameter(paramProp))
    return;
  std::string parName = paramProp->propertyName().toStdString();
  QStringList fnNames;
 
  int iPar = -1;
  for (size_t i = 0; i < m_compositeFunction->nParams(); i++) {
    Mantid::API::ParameterReference ref(m_compositeFunction.get(), i);
    const Mantid::API::IFunction *const fun = ref.getLocalFunction();
 
    // Pick out parameters with the same name as the one we're tying from
    if (fun->parameterName(static_cast<int>(ref.getLocalIndex())) == parName) {
      if (iPar == -1 && fun == h->function().get()) // If this is the 'tied from' parameter, remember it
      {
        iPar = (int)i;
      } else // Otherwise add it to the list of potential 'tyees'
      {
        fnNames << QString::fromStdString(m_compositeFunction->parameterName(i));
      }
    }
  }
  if (fnNames.empty() || iPar < 0) {
    QMessageBox::information(this, "Mantid - information", "Cannot tie this parameter to any function");
    return;
  }
 
  bool ok;
  QString tieName = QInputDialog::getItem(this, "Mantid - Fit", "Select function", fnNames, 0, false, &ok);
 
  if (!ok)
    return;
 
  QString tieExpr = QString::fromStdString(m_compositeFunction->parameterName(iPar)) + "=" + tieName;
 
  h->addTie(tieExpr);
}
 
void FitPropertyBrowser::addFixTie() {
  QtBrowserItem *ci = m_browser->currentItem();
  QtProperty *paramProp = ci->property();
  PropertyHandler *h = getHandler()->findHandler(paramProp);
  if (!h)
    return;
  if (!h->isParameter(paramProp))
    return;
  h->fix(paramProp->propertyName());
}
 
void FitPropertyBrowser::deleteTie() {
  QtBrowserItem *ci = m_browser->currentItem();
  QtProperty *paramProp = ci->property();
  PropertyHandler *h = getHandler()->findHandler(paramProp);
  if (!h)
    return;
  // get name of parent property (i.e. function)
  if (paramProp->propertyName() != "Tie") {
    auto parameterMap = h->getTies();
    auto match = parameterMap.find(paramProp->propertyName());
    if (match != parameterMap.end()) {
      paramProp = match.value();
    }
  }
  if (paramProp->propertyName() == "Tie") {
    auto ties = h->getTies();
    QString qParName = ties.key(paramProp, "");
    std::string parName = qParName.toStdString();
    QStringList functionNames;
    // ithParameter = -1 => not found
    int ithParameter = -1;
    for (size_t i = 0; i < m_compositeFunction->nParams(); i++) {
      const Mantid::API::ParameterReference parameterRef(m_compositeFunction.get(), i);
      const Mantid::API::IFunction *const function = parameterRef.getLocalFunction();
      // Pick out parameters with the same name as the one we're tying from
      if (function->parameterName(static_cast<int>(parameterRef.getLocalIndex())) == parName) {
        if (ithParameter == -1 && function == h->function().get()) // If this is the 'tied from'
                                                                   // parameter, remember it
        {
          ithParameter = static_cast<int>(i);
        } else // Otherwise add it to the list of potential 'tyees'
        {
          functionNames << QString::fromStdString(m_compositeFunction->parameterName(i));
        }
      }
    }
    if (functionNames.empty() && ithParameter < 0) {
      QMessageBox::information(this, "Mantid - information", "Cannot find a parameter with this tie");
    } else {
      QString tieExpr = QString::fromStdString(m_compositeFunction->parameterName(ithParameter));
      h->removeTie(paramProp, tieExpr.toStdString());
    }
  } else {
    h->removeTie(ci->property()->propertyName());
  }
}
 
void FitPropertyBrowser::hasConstraints(QtProperty *parProp, bool &hasTie, bool &hasFix, bool &hasBounds) const {
  hasTie = false;
  hasFix = false;
  hasBounds = false;
  QList<QtProperty *> subs = parProp->subProperties();
  for (const auto *sub : subs) {
    const auto propName = sub->propertyName();
    if (propName == "Tie") {
      hasTie = true;
    } else if (propName == "Fix") {
      hasFix = true;
    } else if (propName == "LowerBound") {
      hasBounds = true;
    } else if (propName == "UpperBound") {
      hasBounds = true;
    }
  }
}
 
QtProperty *FitPropertyBrowser::getTieProperty(QtProperty *parProp) const {
  QList<QtProperty *> subs = parProp->subProperties();
  if (auto sub =
          std::find_if(std::cbegin(subs), std::cend(subs), [](const auto x) { return (*x).propertyName() == "Tie"; });
      sub != std::cend(subs)) {
    return *sub;
  }
  return nullptr;
}
 
void FitPropertyBrowser::handleFactoryUpdate(Mantid::API::FunctionFactoryUpdateNotification_ptr notice) {
  Q_UNUSED(notice);
  // Don't call populate directly as the updates can come from a different
  // thread
  emit functionFactoryUpdateReceived();
}
 
void FitPropertyBrowser::setTip(const QString &txt) { m_tip->setText(txt); }
 
void FitPropertyBrowser::addConstraint(int f, bool lo, bool up) {
  QtBrowserItem *ci = m_browser->currentItem();
  QtProperty *parProp = ci->property();
  PropertyHandler *h = getHandler()->findHandler(parProp);
  if (!h)
    return;
 
  double x = parProp->valueText().toDouble();
  double loBound = x * (1 - 0.01 * f);
  double upBound = x * (1 + 0.01 * f);
 
  h->addConstraint(ci->property(), lo, up, loBound, upBound);
}
 
void FitPropertyBrowser::addLowerBound() { addConstraint(0, true, false); }
 
void FitPropertyBrowser::addLowerBound10() { addConstraint(10, true, false); }
 
void FitPropertyBrowser::addLowerBound50() { addConstraint(50, true, false); }
 
void FitPropertyBrowser::addUpperBound10() { addConstraint(10, false, true); }
 
void FitPropertyBrowser::addUpperBound50() { addConstraint(50, false, true); }
 
void FitPropertyBrowser::addUpperBound() { addConstraint(0, false, true); }
 
void FitPropertyBrowser::addBothBounds10() { addConstraint(10, true, true); }
 
void FitPropertyBrowser::addBothBounds50() { addConstraint(50, true, true); }
 
void FitPropertyBrowser::addBothBounds() { addConstraint(0, true, true); }
 
void FitPropertyBrowser::removeBounds() {
  QtBrowserItem *ci = m_browser->currentItem();
  QtProperty *parProp = ci->property();
  PropertyHandler *h = getHandler()->findHandler(parProp);
  if (!h)
    return;
 
  h->removeConstraint(parProp);
}
 
void FitPropertyBrowser::plotGuessCurrent() { emit plotCurrentGuess(); }
 
void FitPropertyBrowser::plotGuessAll() { emit plotGuess(); }
 
void FitPropertyBrowser::removeGuessCurrent() { emit removeCurrentGuess(); }
 
void FitPropertyBrowser::removeGuessAll() { emit removeGuess(); }
 
void FitPropertyBrowser::plotOrRemoveGuessAll() {
  if (getHandler()->hasPlot()) {
    removeGuessAll();
  } else {
    plotGuessAll();
  }
}
 
void FitPropertyBrowser::clearAllPlots() { emit removeFitCurves(); }
 
QtProperty *FitPropertyBrowser::addDoubleProperty(const QString &name, QtDoublePropertyManager *manager) const {
  if (manager == nullptr)
    manager = m_doubleManager;
  QtProperty *prop = manager->addProperty(name);
  manager->setDecimals(prop, m_decimals);
  manager->setRange(prop, -DBL_MAX, DBL_MAX);
  return prop;
}
 
QtProperty *FitPropertyBrowser::addStringProperty(const QString &name) const {
  QtProperty *prop;
  QString propName = name.toLower();
  if (propName == "filename") {
    prop = m_filenameManager->addProperty(name);
  } else if (propName == "formula") {
    prop = m_formulaManager->addProperty(name);
  } else {
    prop = m_stringManager->addProperty(name);
  }
  return prop;
}
 
QtProperty *FitPropertyBrowser::addStringListProperty(const QString &name,
                                                      const std::vector<std::string> &allowed_values) const {
  QStringList qAllowedValues;
  QtProperty *prop = m_enumManager->addProperty(name);
 
  for (const auto &values : allowed_values) {
    qAllowedValues << QString::fromStdString(values);
  }
  m_enumManager->setEnumNames(prop, qAllowedValues);
 
  return prop;
}
 
void FitPropertyBrowser::setStringPropertyValue(QtProperty *prop, const QString &value) const {
  auto *manager = dynamic_cast<QtStringPropertyManager *>(prop->propertyManager());
  if (manager) {
    manager->setValue(prop, value);
  }
}
 
QString FitPropertyBrowser::getStringPropertyValue(QtProperty *prop) const {
  const auto *const manager = dynamic_cast<QtStringPropertyManager *>(prop->propertyManager());
  if (manager)
    return manager->value(prop);
  else
    return QString("");
}
 
Mantid::API::IFunction_const_sptr FitPropertyBrowser::theFunction() const { return m_compositeFunction; }
 
void FitPropertyBrowser::checkFunction() {}
 
int FitPropertyBrowser::getAllowedIndex(int currentIndex) const {
  auto const workspace = std::dynamic_pointer_cast<MatrixWorkspace>(getWorkspace());
 
  if (!workspace) {
    return 0;
  }
 
  auto const allowedIndices =
      m_allowedSpectra.empty() ? QList<int>() : m_allowedSpectra[QString::fromStdString(workspaceName())];
  auto const firstIndex = m_allowedSpectra.empty() ? 0 : allowedIndices.front();
  auto const lastIndex = m_allowedSpectra.empty() ? getNumberOfSpectra(workspace) - 1 : allowedIndices.back();
 
  auto allowedIndex = currentIndex;
  if (currentIndex < firstIndex) {
    allowedIndex = firstIndex;
  } else if (currentIndex > lastIndex) {
    allowedIndex = lastIndex;
  } else if (!m_allowedSpectra.empty() && !allowedIndices.contains(currentIndex)) {
    allowedIndex = m_oldWorkspaceIndex;
    auto i = allowedIndices.indexOf(m_oldWorkspaceIndex);
    if (i >= 0) {
      i = currentIndex > m_oldWorkspaceIndex ? i + 1 : i - 1;
      if (i >= 0 && i < allowedIndices.size()) {
        allowedIndex = allowedIndices[i];
      }
    }
  }
  return allowedIndex;
}
 
void FitPropertyBrowser::saveFunction() {
  bool ok(false);
  QString fnName = QInputDialog::getText(this, tr("Mantid - Input"), tr("Please select a name for the function"),
                                         QLineEdit::Normal, "", &ok);
  if (ok && !fnName.isEmpty()) {
    saveFunction(fnName);
  }
}
 
void FitPropertyBrowser::saveFunction(const QString &fnName) {
  QSettings settings;
  settings.beginGroup("Mantid/FitBrowser/SavedFunctions");
  QStringList names = settings.childKeys();
  if (names.contains(fnName) &&
      QMessageBox::question(this, "Mantid - Question",
                            "Function with this name already exists.\n"
                            "Would you like to replace it?",
                            QMessageBox::Yes | QMessageBox::No, QMessageBox::No) != QMessageBox::Yes) {
    return;
  }
  QSettingsChangeAware(settings).setValue(fnName, QString::fromStdString(theFunction()->asString()));
  updateSetupMenus();
}
 
void FitPropertyBrowser::loadFunction() {
  QSettings settings;
  settings.beginGroup("Mantid/FitBrowser/SavedFunctions");
  QStringList names = settings.childKeys();
  if (names.isEmpty()) {
    QMessageBox::information(this, "Mantid - Information", "There are no saved functions");
    return;
  }
  QString name = QInputDialog::getItem(this, "Mantid - Input", "Please select a function to load", names, 0, false);
  if (!name.isEmpty()) {
    QString str = settings.value(name).toString();
 
    loadFunction(str);
  }
}
 
void FitPropertyBrowser::loadFunctionFromString() {
  QString str = QInputDialog::getText(this, "Mantid - Input", "Specify fit function string");
 
  if (!str.isEmpty()) {
    loadFunction(str);
  }
}
 
void FitPropertyBrowser::loadFunction(const QString &funcString) {
  // when loading a function from a string initially
  // do not try to do auto background even if set
  bool isAutoBGset = false;
  if (m_auto_back) {
    isAutoBGset = true;
    m_auto_back = false;
  }
 
  getHandler()->removeAllPlots();
  clearBrowser();
  createCompositeFunction(funcString);
  emit functionLoaded(funcString);
 
  if (isAutoBGset)
    m_auto_back = true;
}
 
void FitPropertyBrowser::copy() {
  QClipboard *clipboard = QApplication::clipboard();
  clipboard->setText(QString::fromStdString(theFunction()->asString()));
}
 
void FitPropertyBrowser::paste() {
  QClipboard *clipboard = QApplication::clipboard();
  QString str = clipboard->text();
  createCompositeFunction(str);
}
 
void FitPropertyBrowser::reset() {
  QString str = QString::fromStdString(theFunction()->asString());
  // getHandler()->removeAllPlots();// this crashes mantidplot
  clearBrowser();
  createCompositeFunction(str);
}
 
void FitPropertyBrowser::setWorkspace(const Mantid::API::IFunction_sptr &function) const {
  std::string wsName = workspaceName();
  if (!wsName.empty()) {
    try {
      auto ws = Mantid::API::AnalysisDataService::Instance().retrieve(wsName);
      auto mws = std::dynamic_pointer_cast<Mantid::API::MatrixWorkspace>(ws);
      if (mws) {
        function->setMatrixWorkspace(mws, workspaceIndex(), startX(), endX());
      } else {
        function->setWorkspace(ws);
      }
    } catch (...) {
    }
  }
}
 
void FitPropertyBrowser::addAutoBackground() {
  if (m_autoBgName.isEmpty())
    return;
  bool hasPlot = false;
  PropertyHandler *ch = currentHandler();
  if (m_autoBackground) { // remove old background
    if (ch == m_autoBackground) {
      ch = nullptr;
    }
    hasPlot = m_autoBackground->hasPlot();
    m_autoBackground->removeFunction();
    m_autoBackground = nullptr;
  }
  // Create the function
  PropertyHandler *h = getHandler()->addFunction(m_autoBgName.toStdString());
  if (!h)
    return;
  if (!m_autoBgAttributes.isEmpty()) { // set attributes
    QStringList attList = m_autoBgAttributes.split(' ');
    for (const QString &att : attList) {
      QStringList name_value = att.split('=');
      if (name_value.size() == 2) {
        QString name = name_value[0].trimmed();
        QString value = name_value[1].trimmed();
        if (h->function()->hasAttribute(name.toStdString())) {
          h->setAttribute(name, value);
        }
      }
    }
  }
  h->fit();
  m_autoBackground = h;
  getHandler()->calcBaseAll();
  if (hasPlot) {
    setCurrentFunction(h);
    emit plotCurrentGuess();
    if (ch) {
      setCurrentFunction(ch);
    }
  }
}
 
void FitPropertyBrowser::refitAutoBackground() {
  if (m_autoBackground) {
    m_autoBackground->fit();
  }
}
 
void FitPropertyBrowser::setAutoBackgroundName(const QString &aName) {
  try {
    QStringList nameList = aName.split(' ');
    if (nameList.isEmpty())
      return;
    QString name = nameList[0];
    std::shared_ptr<Mantid::API::IFunction> f = std::shared_ptr<Mantid::API::IFunction>(
        Mantid::API::FunctionFactory::Instance().createFunction(name.toStdString()));
    m_auto_back = true;
    m_autoBgName = name;
    if (nameList.size() > 1) {
      nameList.removeFirst();
      m_autoBgAttributes = nameList.join(" ");
    }
    Mantid::Kernel::ConfigService::Instance().setString("curvefitting.autoBackground", aName.toStdString());
  } catch (...) {
    m_auto_back = false;
  }
}
 
void FitPropertyBrowser::sequentialFit() {
  auto *dlg = new SequentialFitDialog(this, m_mantidui);
  std::string wsName = workspaceName();
  if (!wsName.empty() && dlg->addWorkspaces(QStringList(QString::fromStdString(wsName)))) {
    dlg->show();
  }
}
 
void FitPropertyBrowser::findPeaks(const std::unique_ptr<FindPeakStrategyGeneric> findPeakStrategy) {
  std::string wsName{workspaceName()};
  if (wsName.empty()) {
    QMessageBox::critical(this, "Mantid - Error", "Workspace name is not set");
    return;
  }
 
  std::string peakListName = wsName + "_PeakList_tmp";
  QString setting =
      QString::fromStdString(Mantid::Kernel::ConfigService::Instance().getString("curvefitting.findPeaksFWHM"));
  int FWHM{setting.isEmpty() ? 7 : setting.toInt()};
 
  AlgorithmFinishObserver obs;
  findPeakStrategy->initialise(wsName, workspaceIndex(), peakListName, FWHM, &obs);
 
  QApplication::setOverrideCursor(QCursor(Qt::WaitCursor));
 
  Mantid::API::MatrixWorkspace_sptr inputWS = std::dynamic_pointer_cast<Mantid::API::MatrixWorkspace>(
      Mantid::API::AnalysisDataService::Instance().retrieve(workspaceName()));
 
  try {
    findPeakStrategy->execute();
    clear();
    m_browser->setUpdatesEnabled(false);
    for (size_t i = 0; i < findPeakStrategy->peakNumber(); ++i) {
      if (findPeakStrategy->getPeakCentre(i) < startX() || findPeakStrategy->getPeakCentre(i) > endX()) {
        continue;
      }
      if (!createAndAddFunction(inputWS, i, findPeakStrategy)) {
        break;
      }
    }
    m_browser->setUpdatesEnabled(true);
    emit functionChanged();
  } catch (...) {
    m_browser->setUpdatesEnabled(true);
    QApplication::restoreOverrideCursor();
    throw;
  }
 
  QApplication::restoreOverrideCursor();
}
 
void FitPropertyBrowser::setPeakToolOn(bool on) {
  m_peakToolOn = on;
  m_displayActionPlotGuess->setEnabled(on);
}
 
void FitPropertyBrowser::updateDecimals() {
  if (m_decimals < 0) {
    QSettings settings;
    settings.beginGroup("Mantid/FitBrowser");
    m_decimals = settings.value("decimals", 6).toInt();
  }
  QSet<QtProperty *> props = m_doubleManager->properties();
  for (QtProperty *prop : props) {
    m_doubleManager->setDecimals(prop, m_decimals);
  }
}
 
void FitPropertyBrowser::setDecimals(int d) {
  m_decimals = d;
  QSettings settings;
  settings.beginGroup("Mantid/FitBrowser");
  QSettingsChangeAware(settings).setValue("decimals", d);
  updateDecimals();
}
 
bool FitPropertyBrowser::plotDiff() const { return m_boolManager->value(m_plotDiff); }
 
bool FitPropertyBrowser::plotCompositeMembers() const { return m_boolManager->value(m_plotCompositeMembers); }
 
bool FitPropertyBrowser::rawData() const { return m_boolManager->value(m_rawData); }
 
void FitPropertyBrowser::setTextPlotGuess(const QString &text) { m_displayActionPlotGuess->setText(text); }
 
void FitPropertyBrowser::workspaceChange(const QString &wsName) {
  if (m_guessOutputName) {
    m_stringManager->setValue(m_output, QString::fromStdString(workspaceName()));
  }
 
  emit workspaceNameChanged(wsName);
  emit wsChangePPAssign(wsName);
}
 
const QStringList &FitPropertyBrowser::getWorkspaceNames() { return m_workspaceNames; }
 
void FitPropertyBrowser::setupMultifit() {
  auto *dlg = new MultifitSetupDialog(this);
  dlg->exec();
  QStringList ties = dlg->getParameterTies();
 
  if (!ties.isEmpty()) {
    QString wsName = QString::fromStdString(workspaceName());
    Mantid::API::MatrixWorkspace_sptr mws = std::dynamic_pointer_cast<Mantid::API::MatrixWorkspace>(
        Mantid::API::AnalysisDataService::Instance().retrieve(workspaceName()));
    if (mws) {
      auto fun = getFunctionAtIndex(0);
      QString fun1Ini = QString::fromStdString(fun->asString());
      QString funIni = "composite=MultiBG;" + fun1Ini + ",Workspace=" + wsName + ",WSParam=(WorkspaceIndex=0);";
      QString tieStr;
      for (size_t i = 1; i < mws->getNumberHistograms(); ++i) {
        QString comma = i > 1 ? "," : "";
        QString fi = comma + "f" + QString::number(i) + ".";
        for (int j = 0; j < static_cast<int>(fun->nParams()); ++j) {
          if (!ties[j].isEmpty()) {
            tieStr += fi + QString::fromStdString(fun->parameterName(j)) + "=" + ties[j];
          }
        }
        QString wsParam = ",WSParam=(WorkspaceIndex=" + QString::number(i);
        wsParam += ",StartX=" + QString::number(startX()) + ",EndX=" + QString::number(endX()) + ")";
        funIni += fun1Ini + ",Workspace=" + wsName + wsParam + ";";
      }
      if (!tieStr.isEmpty()) {
        funIni += "ties=(" + tieStr + ")";
      }
      loadFunction(funIni);
    }
  }
}
 
void FitPropertyBrowser::processMultiBGResults() {
  if (compositeFunction()->name() != "MultiBG")
    return;
 
  // if all member functions are of the same type and composition
  // create a TableWorkspace with parameter series
 
  // check if member functions are the same
  QStringList parNames;
  auto fun0 = getFunctionAtIndex(0);
  if (!fun0) {
    throw std::runtime_error("IFunction expected but func function of another type");
  }
  for (size_t i = 0; i < fun0->nParams(); ++i) {
    parNames << QString::fromStdString(fun0->parameterName(i));
  }
 
  for (size_t i = 1; i < compositeFunction()->nFunctions(); ++i) {
    auto fun = getFunctionAtIndex(i);
    if (!fun) {
      throw std::runtime_error("IFunction expected but func function of another type");
    }
    for (size_t j = 0; j < fun->nParams(); ++j) {
      if (parNames.indexOf(QString::fromStdString(fun->parameterName(j))) < 0) {
        // Functions are different, stop
        return;
      }
    }
  }
 
  QApplication::setOverrideCursor(Qt::WaitCursor);
  // create a TableWorkspace: first column - function index
  // other colomns - the parameters
  Mantid::API::ITableWorkspace_sptr table = Mantid::API::WorkspaceFactory::Instance().createTable("TableWorkspace");
  table->addColumn("int", "Index");
  for (const QString &par : parNames) {
    table->addColumn("double", par.toStdString());
  }
  // Create WorkspaceGroup with the fit results
  std::vector<std::string> worspaceNames(compositeFunction()->nFunctions());
  for (size_t i = 0; i < compositeFunction()->nFunctions(); ++i) {
    // Mantid::API::TableRow row = table->appendRow();
    // row << int(i);
    // Mantid::API::IFunctionMW* fun =
    // dynamic_cast<Mantid::API::IFunctionMW*>(compositeFunction()->getFunction(i));
    // for(size_t j = 0; j < fun->nParams(); ++j)
    //{
    //  row << fun->getParameter(j);
    //}
    // size_t wi = fun->getWorkspaceIndex();
    // Mantid::API::MatrixWorkspace_sptr mws =
    // fun->createCalculatedWorkspace(fun->getMatrixWorkspace(),wi);
    // worspaceNames[i] =
    // workspaceNames()+"_"+QString::number(wi).toStdString()+"_Workspace";
    // Mantid::API::AnalysisDataService::Instance().addOrReplace(worspaceNames[i],mws);
  }
 
  // Save the table
  Mantid::API::AnalysisDataService::Instance().addOrReplace(workspaceName() + "_Param_series", table);
  try {
    Mantid::API::IAlgorithm_sptr group = Mantid::API::AlgorithmManager::Instance().create("GroupWorkspaces");
    group->setProperty("InputWorkspaces", worspaceNames);
    group->setPropertyValue("OutputWorkspace", workspaceName() + "_Workspace");
    group->execute();
  } catch (...) {
  }
  QApplication::restoreOverrideCursor();
}
 
void FitPropertyBrowser::setWorkspaceProperties() {
  // remove old properties
  if (m_browser->isItemVisible(m_settingsGroup)) {
    if (m_settingsGroup->property()->subProperties().contains(m_workspaceIndex)) {
      m_settingsGroup->property()->removeSubProperty(m_workspaceIndex);
    } else if (m_settingsGroup->property()->subProperties().contains(m_xColumn)) {
      m_settingsGroup->property()->removeSubProperty(m_xColumn);
      m_settingsGroup->property()->removeSubProperty(m_yColumn);
      m_settingsGroup->property()->removeSubProperty(m_errColumn);
    }
  }
 
  Mantid::API::Workspace_sptr ws;
  try {
    ws = Mantid::API::AnalysisDataService::Instance().retrieve(workspaceName());
  } catch (...) {
    return;
  }
  if (!ws)
    return;
 
  // If this is a MuonFitPropertyBrowser, "evaluation type" goes in the Custom
  // Settings group.
  // If not, there is no Custom Settings group and it goes in the regular
  // Settings group.
  const auto *const settings = m_customSettingsGroup ? m_customSettingsGroup : m_settingsGroup;
 
  if (settings->property()->subProperties().contains(m_evaluationType)) {
    settings->property()->removeSubProperty(m_evaluationType);
    m_evaluationType->setEnabled(false);
    // if it is a MatrixWorkspace insert WorkspaceIndex
    auto mws = std::dynamic_pointer_cast<Mantid::API::MatrixWorkspace>(ws);
    if (mws) {
      addWorkspaceIndexToBrowser();
      auto isHistogram = mws->isHistogramData();
      m_evaluationType->setEnabled(isHistogram);
      if (isHistogram) {
        settings->property()->addSubProperty(m_evaluationType);
      }
      return;
    }
  }
 
  // if it is a TableWorkspace insert the column properties
  auto tws = std::dynamic_pointer_cast<Mantid::API::ITableWorkspace>(ws);
  if (tws) {
    setWorkspaceIndex(0);
    // insert properties
    m_settingsGroup->property()->insertSubProperty(m_xColumn, m_workspace);
    m_settingsGroup->property()->insertSubProperty(m_yColumn, m_xColumn);
    m_settingsGroup->property()->insertSubProperty(m_errColumn, m_yColumn);
    if (workspaceName() == m_storedWorkspaceName)
      return;
    QString xName;
    QString yName;
    QString errName;
    auto names = tws->getColumnNames();
    QStringList columns;
    for (const auto &name : names) {
      columns << QString::fromStdString(name);
      auto col = tws->getColumn(name);
      if (xName.isEmpty() && col->getPlotType() == 1 /*X*/) {
        xName = QString::fromStdString(name);
      }
      if (yName.isEmpty() && col->getPlotType() == 2 /*Y*/) {
        yName = QString::fromStdString(name);
      }
      if (errName.isEmpty() && col->getPlotType() == 5 /*yErr*/) {
        errName = QString::fromStdString(name);
      }
    }
    m_columnManager->setEnumNames(m_xColumn, columns);
    m_columnManager->setEnumNames(m_yColumn, columns);
    // set the column values
    if (!xName.isEmpty()) {
      m_columnManager->setValue(m_xColumn, static_cast<int>(columns.indexOf(xName)));
    } else {
      if (auto name = std::find_if(std::cbegin(columns), std::cend(columns), [&](const auto x) { return x != yName; });
          name != std::cend(columns)) {
        m_columnManager->setValue(m_xColumn, static_cast<int>(columns.indexOf(*name)));
      }
    }
    if (!yName.isEmpty()) {
      m_columnManager->setValue(m_yColumn, static_cast<int>(columns.indexOf(yName)));
    } else {
      if (auto name = std::find_if(std::cbegin(columns), std::cend(columns), [&](const auto x) { return x != xName; });
          name != std::cend(columns)) {
        m_columnManager->setValue(m_yColumn, static_cast<int>(columns.indexOf(*name)));
      }
    }
    columns.prepend("");
    m_columnManager->setEnumNames(m_errColumn, columns);
    if (!errName.isEmpty()) {
      m_columnManager->setValue(m_errColumn, static_cast<int>(columns.indexOf(errName)));
    } else {
      m_columnManager->setValue(m_errColumn, 0);
    }
    return;
  }
}
 
void FitPropertyBrowser::addWorkspaceIndexToBrowser() {
  if (m_browser->isItemVisible(m_settingsGroup)) {
    if (!m_settingsGroup->property()->subProperties().contains(m_workspaceIndex)) {
      m_settingsGroup->property()->insertSubProperty(m_workspaceIndex, m_workspace);
    }
  }
}
 
void FitPropertyBrowser::fit() { doFit(m_intManager->value(m_maxIterations)); }
 
void FitPropertyBrowser::toggleSettingsBrowserVisible() {
  if (m_browser->isItemVisible(m_settingsGroup)) {
    m_browser->setItemVisible(m_settingsGroup, false);
  } else {
    m_browser->setItemVisible(m_settingsGroup, true);
  }
}
 
void FitPropertyBrowser::removePropertiesFromSettingsBrowser(const QStringList &propsToRemove) {
  // get settings properties
  QList<QtProperty *> props = m_settingsGroup->property()->subProperties();
  for (auto &prop : props) {
    if (propsToRemove.contains(prop->propertyName())) {
      m_settingsGroup->property()->removeSubProperty(prop);
    }
  }
}
 
void FitPropertyBrowser::toggleWsListVisible() { m_hideWsListWidget = !m_hideWsListWidget; }
 
void FitPropertyBrowser::columnChanged(QtProperty *prop) {
  if (prop == m_xColumn) { // update startX and endX
    try {
      auto ws = Mantid::API::AnalysisDataService::Instance().retrieve(workspaceName());
      auto tws = std::dynamic_pointer_cast<Mantid::API::ITableWorkspace>(ws);
      if (!tws)
        return;
      int i = m_columnManager->value(m_xColumn);
      if (i < 0 || i >= static_cast<int>(tws->rowCount()) || tws->rowCount() == 0)
        return;
      auto col = tws->getColumn(static_cast<size_t>(i));
      const double startXVal = col->toDouble(0);
      const double endXVal = col->toDouble(tws->rowCount() - 1);
      m_doubleManager->setValue(m_startX, startXVal);
      m_doubleManager->setValue(m_endX, endXVal);
    } catch (...) {
      // do nothing
    }
  }
}
 
void FitPropertyBrowser::minimizerChanged() {
  // delete old minimizer properties
  for (QtProperty *prop : m_minimizerProperties) {
    m_settingsGroup->property()->removeSubProperty(prop);
  }
 
  // add new minimizer properties
  auto minzer = Mantid::API::FuncMinimizerFactory::Instance().createMinimizer(this->minimizer());
  const auto &properties = minzer->getProperties();
  for (auto property : properties) {
    QString propName = QString::fromStdString((*property).name());
    QtProperty *prop = nullptr;
    if (const auto prp = dynamic_cast<const Mantid::Kernel::PropertyWithValue<bool> *const>(property)) {
      prop = m_boolManager->addProperty(propName);
      bool val = *prp;
      m_boolManager->setValue(prop, val);
    } else if (const auto prp = dynamic_cast<const Mantid::Kernel::PropertyWithValue<double> *const>(property)) {
      prop = this->addDoubleProperty(propName);
      double val = *prp;
      m_doubleManager->setValue(prop, val);
    } else if (const auto prp = dynamic_cast<const Mantid::Kernel::PropertyWithValue<int> *const>(property)) {
      prop = m_intManager->addProperty(propName);
      int val = *prp;
      m_intManager->setValue(prop, val);
    } else if (const auto prp = dynamic_cast<const Mantid::Kernel::PropertyWithValue<size_t> *const>(property)) {
      prop = m_intManager->addProperty(propName);
      size_t val = *prp;
      m_intManager->setValue(prop, static_cast<int>(val));
    } else if (const auto prp = dynamic_cast<const Mantid::Kernel::PropertyWithValue<std::string> *const>(property)) {
      prop = m_stringManager->addProperty(propName);
      QString val = QString::fromStdString(prp->value());
      m_stringManager->setValue(prop, val);
    } else if (dynamic_cast<Mantid::API::IWorkspaceProperty *>(property)) {
      prop = m_stringManager->addProperty(propName);
      m_stringManager->setValue(prop, QString::fromStdString((*property).value()));
    } else {
      QMessageBox::warning(this, "Mantid - Error",
                           "Type of minimizer's property " + propName + " is not yet supported by the browser.");
      continue;
    }
 
    if (!prop)
      continue;
    // set the tooltip from property doc string
    QString toolTip = QString::fromStdString((*property).documentation());
    if (!toolTip.isEmpty()) {
      prop->setToolTip(toolTip);
    }
    m_settingsGroup->property()->addSubProperty(prop);
    m_minimizerProperties.append(prop);
  }
}
 
QList<double> FitPropertyBrowser::getParameterValues() const {
  auto fun = theFunction();
  size_t np = fun->nParams();
  QList<double> out;
  for (size_t i = 0; i < np; ++i) {
    const double parValue = fun->getParameter(i);
    out.append(parValue);
  }
  return out;
}
 
QStringList FitPropertyBrowser::getParameterNames() const {
  auto fun = theFunction();
  size_t np = fun->nParams();
  QStringList out;
  for (size_t i = 0; i < np; ++i) {
    std::string parName = fun->parameterName(i);
    out.append(QString::fromStdString(parName));
  }
  return out;
}
const std::string &FitPropertyBrowser::getFitAlgorithmParameters() const { return m_fitAlgParameters; }
 
const std::string &FitPropertyBrowser::getFitAlgorithmOutputStatus() const { return m_fitAlgOutputStatus; }
 
void FitPropertyBrowser::functionHelp() {
  const PropertyHandler *const handler = currentHandler();
  if (handler) {
    MantidQt::API::HelpWindow::showFitFunction(handler->ifun()->name());
  }
}
 
void FitPropertyBrowser::browserHelp() {
  MantidQt::API::HelpWindow::showPage(QStringLiteral("workbench/plotwindow.html"));
}
 
void FitPropertyBrowser::allowSequentialFits(bool allow) {
  if (m_fitActionSeqFit) {
    if (allow) {
      m_fitActionSeqFit->setEnabled(m_compositeFunction->nFunctions() > 0);
    } else {
      m_fitActionSeqFit->setEnabled(false);
    }
  }
}
 
void FitPropertyBrowser::modifyFitMenu(QAction *fitAction, bool enabled) {
  if (enabled) {
    m_fitMenu->addAction(fitAction);
  } else {
    m_fitMenu->removeAction(fitAction);
  }
}
 
int MantidQt::MantidWidgets::FitPropertyBrowser::sizeOfFunctionsGroup() const {
  return static_cast<int>(m_functionsGroup->children().size());
}
 
void FitPropertyBrowser::addAllowedSpectra(const QString &wsName, const QList<int> &wsSpectra) {
  auto const name = wsName.toStdString();
  auto ws = AnalysisDataService::Instance().retrieveWS<MatrixWorkspace>(name);
  if (ws) {
    QList<int> indices;
    indices.reserve(wsSpectra.size());
    std::transform(wsSpectra.cbegin(), wsSpectra.cend(), std::back_inserter(indices),
                   [&ws](const auto i) { return static_cast<int>(ws->getIndexFromSpectrumNumber(i)); });
 
    auto wsFound = m_allowedSpectra.find(wsName);
    m_allowedSpectra.insert(wsName, indices);
    if (wsFound != m_allowedSpectra.end()) {
      // we already knew about this workspace
      // update workspace index list
      intChanged(m_workspaceIndex);
    } else {
      // new workspace, update workspace names
      populateWorkspaceNames();
    }
  } else {
    throw std::runtime_error("Workspace " + name + " is not a MatrixWorkspace");
  }
}
 
void FitPropertyBrowser::removeWorkspaceAndSpectra(const std::string &wsName) {
  removeWorkspace(wsName);
  // remove spectra. The find must be checked before it is erased: erasing end() is undefined
  // behaviour, and a caller removing a workspace this browser was never told about - or removing the
  // same one twice - reaches here with no entry to erase.
  QString qWsName = QString::fromStdString(wsName);
  auto const spectra = m_allowedSpectra.find(qWsName);
  if (spectra != m_allowedSpectra.end()) {
    m_allowedSpectra.erase(spectra);
  }
}
 
void FitPropertyBrowser::addAllowedTableWorkspace(const QString &wsName) {
  auto const name = wsName.toStdString();
  auto ws = AnalysisDataService::Instance().retrieveWS<ITableWorkspace>(name);
  if (ws) {
    m_allowedTableWorkspace = wsName;
  } else {
    throw std::runtime_error("Workspace " + name + " is not a TableWorkspace");
  }
}
 
QString FitPropertyBrowser::addFunction(const QString &fnName) {
  return addFunction(fnName.toStdString())->functionPrefix();
}
 
bool FitPropertyBrowser::createAndAddFunction(const Mantid::API::MatrixWorkspace_sptr inputWS, const size_t peakIndex,
                                              const std::unique_ptr<FindPeakStrategyGeneric> &findPeakStrategy) {
  bool validFn = false;
  auto f = std::dynamic_pointer_cast<Mantid::API::IPeakFunction>(
      Mantid::API::FunctionFactory::Instance().createFunction(defaultPeakType()));
  if (f) {
    validFn = true;
    f->setMatrixWorkspace(inputWS, workspaceIndex(), startX(), endX());
    f->setCentre(findPeakStrategy->getPeakCentre(peakIndex));
    f->setFwhm(findPeakStrategy->getPeakWidth(peakIndex));
    f->setHeight(findPeakStrategy->getPeakHeight(peakIndex));
    addFunction(f->asString(), false);
  }
  return validFn;
}
 
PropertyHandler *FitPropertyBrowser::getPeakHandler(const QString &prefix) {
  if (prefix.isEmpty())
    throw std::runtime_error("Peak function prefix cannot be empty");
  auto const indexList = prefix.split(".");
  auto const n = indexList.size() - 1;
  auto const *handler = getHandler();
  for (int i = 0; i < n; ++i) {
    auto const index = indexList[i].mid(1).toInt();
    handler = handler->getHandler(index);
  }
  return handler->getHandler(indexList[n].mid(1).toInt());
}
 
void FitPropertyBrowser::setPeakCentreOf(const QString &prefix, double value) {
  auto handler = getPeakHandler(prefix);
  handler->setCentre(value);
  handler->updateParameters();
}
 
double FitPropertyBrowser::getPeakCentreOf(const QString &prefix) {
  const auto *handler = getPeakHandler(prefix);
  return handler->centre();
}
 
void FitPropertyBrowser::setPeakHeightOf(const QString &prefix, double value) {
  auto handler = getPeakHandler(prefix);
  handler->setHeight(value);
  handler->updateParameters();
}
 
double FitPropertyBrowser::getPeakHeightOf(const QString &prefix) {
  const auto *handler = getPeakHandler(prefix);
  return handler->height();
}
 
void FitPropertyBrowser::setPeakFwhmOf(const QString &prefix, double value) {
  auto handler = getPeakHandler(prefix);
  handler->setFwhm(value);
  handler->updateParameters();
}
 
double FitPropertyBrowser::getPeakFwhmOf(const QString &prefix) {
  const auto *handler = getPeakHandler(prefix);
  return handler->fwhm();
}
 
std::string FitPropertyBrowser::getWidthParameterNameOf(const QString &prefix) {
  const auto *handler = getPeakHandler(prefix);
  return handler->getWidthParameterName();
}
 
std::string FitPropertyBrowser::getCentreParameterNameOf(const QString &prefix) {
  const auto *handler = getPeakHandler(prefix);
  return handler->getCentreParameterName();
}
 
bool FitPropertyBrowser::isParameterExplicitlySetOf(const QString &prefix, const std::string &param) {
  const auto *handler = getPeakHandler(prefix);
  return handler->isParameterExplicitlySet(param);
}
 
QStringList FitPropertyBrowser::getPeakPrefixes() const {
  QStringList peaks;
  const auto *parentHandler = getHandler();
  const auto nFunctions = parentHandler->cfun()->nFunctions();
  for (size_t i = 0; i < nFunctions; ++i) {
    const auto *handler = parentHandler->getHandler(i);
    if (handler->pfun()) {
      peaks << handler->functionPrefix();
    }
  }
  return peaks;
}
 
} // namespace MantidWidgets
} // namespace MantidQt