AlgorithmDialog.cpp

//----------------------------------
// Includes
//----------------------------------
#include "MantidAPI/AlgorithmManager.h"
#include "MantidAPI/IWorkspaceProperty.h"
#include "MantidKernel/DateAndTime.h"
#include "MantidKernel/Logger.h"

#include "MantidQtAPI/AlgorithmDialog.h"
#include "MantidQtAPI/AlgorithmInputHistory.h"
#include "MantidQtAPI/MantidWidget.h"
#include "MantidQtAPI/HelpWindow.h"
#include "MantidQtAPI/FilePropertyWidget.h"

#include <QIcon>
#include <QLabel>
#include <QMessageBox>
#include <QLineEdit>
#include <QComboBox>
#include <QCheckBox>
#include <QPushButton>
#include <QHBoxLayout>
#include <QCheckBox>
#include <QtGui>

#include <Poco/ActiveResult.h>

using namespace MantidQt::API;
using Mantid::API::IAlgorithm;
using Mantid::Kernel::DateAndTime;

namespace
{
  Mantid::Kernel::Logger g_log("AlgorithmDialog");
}

//------------------------------------------------------
// Public member functions
//------------------------------------------------------
/**
 * Default Constructor
 */
AlgorithmDialog::AlgorithmDialog(QWidget* parent) :
  QDialog(parent), m_algorithm(), m_algName(""), m_algProperties(),
  m_propertyValueMap(), m_tied_properties(), m_forScript(false), m_python_arguments(),
  m_enabled(), m_disabled(), m_strMessage(""), m_keepOpen(false), 
  m_msgAvailable(false), m_isInitialized(false),   m_autoParseOnInit(true),  m_validators(), 
  m_noValidation(), m_inputws_opts(), m_outputws_fields(), m_wsbtn_tracker(), 
  m_keepOpenCheckBox(NULL), m_okButton(NULL), m_exitButton(NULL), m_observers(), m_btnTimer()
{
  m_btnTimer.setSingleShot(true);
}

/**
 * Destructor
 */
AlgorithmDialog::~AlgorithmDialog()
{
  m_observers.clear();
  if(isShowKeepOpen() && m_okButton) {
    if(!m_okButton->isEnabled()) {
      // Keep open was checked but closing while algorithm is running
      this->stopObserving(m_algorithm);
    }
  }
}

/**
 * Set if the keep open option is shown.
 * This must be set after calling initializeLayout.
 * @param showOption false to hide the control, otherwise true
 */
void AlgorithmDialog::setShowKeepOpen(const bool showOption) {
  if (m_keepOpenCheckBox)
  {    
    //if hidden then turn it off
    if (!showOption)
    {
      m_keepOpenCheckBox->setCheckState(Qt::CheckState::Unchecked);
    }
    m_keepOpenCheckBox->setVisible(showOption);
  }
}
/**
 * Is the keep open option going to be shown?
 * @returns true if it will be shown
 */
bool AlgorithmDialog::isShowKeepOpen() const
{
  bool retval = true;
  if (m_keepOpenCheckBox)
  {
    retval = m_keepOpenCheckBox->isVisible();
  }
  return retval;
}

/**
 * Create the layout for this dialog.
 *
 * The default is to execute the algorithm when accept() is called. This
 * assumes that the AlgorithmManager owns the
 * algorithm pointer as it must survive after the dialog is destroyed.
 */
void AlgorithmDialog::initializeLayout()
{
  if( isInitialized() ) return;

  //Set a common title
  setWindowTitle(QString::fromStdString(getAlgorithm()->name()) + " input dialog");
  //Set the icon
  setWindowIcon(QIcon(":/MantidPlot_Icon_32offset.png"));

  // These containers are for ensuring the 'replace input workspace; button works correctly
  // Store all combo boxes that relate to an input workspace
  m_inputws_opts.clear();
  // Store all line edit fields that relate to an output workspace name
  m_outputws_fields.clear();
  // Keep track of the input workspace that has been used to fill the output workspace. Each button click
  // cycles through all of the input workspaces
  m_wsbtn_tracker.clear();

  // This derived class function creates the layout of the widget. It can also add default input if the
  // dialog has been written this way
  this->initLayout();

  if(m_autoParseOnInit)
  {
    // Check if there is any default input
    this->parse();
    // Unless told not to, try to set these values. This will validate the defaults and mark those that are invalid, if any.
    this->setPropertyValues();
  }

  executeOnAccept(true);

  connect(this, SIGNAL(algCompletedSignal()), this, SLOT(algorithmCompleted()));
    
  m_isInitialized = true;
}

/**
 * Has this dialog been initialized yet
 *  @returns Whether initialzedLayout has been called yet
 */
bool AlgorithmDialog::isInitialized() const
{
  return m_isInitialized;
}


//------------------------------------------------------
// Protected member functions
//------------------------------------------------------
/**
 * Parse input from widgets on the dialog. This function does nothing in the
 * base class
 */
void AlgorithmDialog::parseInput()
{
}


//-------------------------------------------------------------------------------------------------
/**
 * Save the property values to the input history
 */
void AlgorithmDialog::saveInput()
{
  AlgorithmInputHistory::Instance().clearAlgorithmInput(m_algName);
  QStringList::const_iterator pend = m_algProperties.end();
  for( QStringList::const_iterator pitr = m_algProperties.begin(); pitr != pend; ++pitr )
  {
    Mantid::Kernel::Property* p = getAlgorithmProperty(*pitr);
    if ( p->remember() )
    {
      QString pName = *pitr;
      QString value = m_propertyValueMap.value(pName);
      AlgorithmInputHistory::Instance().storeNewValue(m_algName, QPair<QString, QString>(pName, value));
    }
  }
}


//-------------------------------------------------------------------------------------------------
/**
 * Set the algorithm pointer
 * @param alg :: A pointer to the algorithm
 */
void AlgorithmDialog::setAlgorithm(Mantid::API::IAlgorithm_sptr alg)
{
  m_algorithm = alg;
  m_algName = QString::fromStdString(alg->name());
  m_algProperties.clear();
  m_tied_properties.clear();
  std::vector<Mantid::Kernel::Property*>::const_iterator iend = alg->getProperties().end();
  for( std::vector<Mantid::Kernel::Property*>::const_iterator itr = alg->getProperties().begin(); itr != iend;
       ++itr )
  {
    Mantid::Kernel::Property *p = *itr;
    if( dynamic_cast<Mantid::API::IWorkspaceProperty*>(p) || p->direction() != Mantid::Kernel::Direction::Output )
    {
      m_algProperties.append(QString::fromStdString(p->name()));
    }
  }

  m_validators.clear();
  m_noValidation.clear();
}

/**
 * Get the algorithm pointer
 * @returns A pointer to the algorithm that is associated with the dialog
 */
Mantid::API::IAlgorithm_sptr AlgorithmDialog::getAlgorithm() const
{
  return m_algorithm;
}

/**
 * Get a named property for this algorithm
 * @param propName :: The name of the property
 */
Mantid::Kernel::Property* AlgorithmDialog::getAlgorithmProperty(const QString & propName) const
{
  if( m_algProperties.contains(propName) )
  {
    return m_algorithm->getProperty(propName.toStdString());
  }
  else return NULL;
}

/**
 * Return a true if the given property requires user input
 * @param propName :: The name of the property
 */
bool AlgorithmDialog::requiresUserInput(const QString & propName) const
{
  return m_algProperties.contains(propName);
}


//-------------------------------------------------------------------------------------------------
/**
 * Get an input value from the form, dealing with blank inputs etc
 * @param propName :: The name of the property
 */
QString AlgorithmDialog::getInputValue(const QString& propName) const
{
  QString value = m_propertyValueMap.value(propName);
  if( value.isEmpty() )
  {
    Mantid::Kernel::Property* prop = getAlgorithmProperty(propName);
    if( prop ) return QString::fromStdString(prop->getDefault());
    else return "";
  }

  return value;
}


//-------------------------------------------------------------------------------------------------
/** Get or make a property validator label (that little red star)
 *
 * @param propname :: name of the Property
 * @return the QLabel pointer. Will create one if needed.
 */
QLabel* AlgorithmDialog::getValidatorMarker(const QString & propname)
{
  if( m_noValidation.contains(propname) ) return NULL;
  QLabel *validLbl(NULL);
  if( !m_validators.contains(propname) )
  {
    validLbl = new QLabel("*", this);
    QPalette pal = validLbl->palette();
    pal.setColor(QPalette::WindowText, Qt::darkRed);
    validLbl->setPalette(pal);
    validLbl->setVisible(true);
    m_validators[propname] = validLbl;
  }
  else
  {
    validLbl = m_validators.value(propname);
  }
  return validLbl;
}


//-------------------------------------------------------------------------------------------------
/**
 * Adds a property (name,value) pair to the stored map
 */
void AlgorithmDialog::storePropertyValue(const QString & name, const QString & value)
{
  if( name.isEmpty() ) return;
  m_propertyValueMap.insert(name, value);
}

//-------------------------------------------------------------------------------------------------
/**
 * Adds a property (name,value) pair to the stored map.
 * @param name :: The name of the property.
 */
void AlgorithmDialog::removePropertyValue(const QString& name)
{
  if( name.isEmpty() ) return;
  m_propertyValueMap.remove(name);
}


//-------------------------------------------------------------------------------------------------
/** Show the validators for all the properties */
void AlgorithmDialog::showValidators()
{
  // Do nothing for non-generic algorithm dialogs
  QStringList::const_iterator pend = m_algProperties.end();
  for( QStringList::const_iterator pitr = m_algProperties.begin(); pitr != pend; ++pitr )
  {
    const QString propName = *pitr;

    // Find the widget for this property.
    if (m_tied_properties.contains(propName))
    {
      // Show/hide the validator label (that red star)
      QString error = "";
      if (m_errors.contains(propName)) error = m_errors[propName];

      QLabel *validator = getValidatorMarker(propName);
      // If there's no validator then assume it's handling its own validation notification
      if( validator && validator->parent() )
      {
        validator->setToolTip( error );
        validator->setVisible( error.length() != 0);
      }
    } // widget is tied
  } // for each property
}

//-------------------------------------------------------------------------------------------------
/** Sets the value of a single property, using the value previously stored using
 * storePropertyValue()
 *
 * @param pName :: name of the property to set
 * @param validateOthers :: set to true to validate, enable, or hide ALL other properties after.
 *        Set false if you are setting ALL property values and do it once at the end.
 * @return true if the property is valid.
 */
bool AlgorithmDialog::setPropertyValue(const QString pName, bool validateOthers)
{
  //Mantid::Kernel::Property *p = getAlgorithmProperty(pName);
  QString value = getInputValue(pName);

  std::string error("");
  try
  {
    //error = p->setValue(value.toStdString());
    getAlgorithm()->setPropertyValue(pName.toStdString(),value.toStdString());
  }
  catch(std::exception & err_details)
  {
    error = err_details.what();
  }
  // Save the error string for later
  m_errors[pName] = QString::fromStdString(error).trimmed();

  // Go through all the other properties' validators
  if (validateOthers)
    this->showValidators();


  // Prop was valid if the error string is empty
  return error.empty();
}


//-------------------------------------------------------------------------------------------------
/** Set the properties that have been parsed from the dialog.
 *
 * @param skipList :: An optional list of property names whose values will not be set
 * @returns A boolean that indicates if the validation was successful.
 */
bool AlgorithmDialog::setPropertyValues(const QStringList & skipList)
{
  QStringList::const_iterator pend = m_algProperties.end();
  bool allValid(true);
  for( QStringList::const_iterator pitr = m_algProperties.begin(); pitr != pend; ++pitr )
  {
    const QString pName = *pitr;
    if( skipList.contains(pName) )
    {
      // For the load dialog, skips setting some properties
      Mantid::Kernel::Property *p = getAlgorithmProperty(pName);
      std::string error = p->isValid();
      m_errors[pName] = QString::fromStdString(error).trimmed();
      if (!error.empty()) allValid = false;
    }
    else
    {
      bool thisValid = this->setPropertyValue(pName, false);
      allValid = allValid && thisValid;
    }
  }

  // Do additional validation on the WHOLE set of properties
  // But only if the individual validation passed
  if ( allValid )
  {
    std::map<std::string, std::string> errs = m_algorithm->validateInputs();
    for (auto it = errs.begin(); it != errs.end(); it++)
    {
      // only count as an error if the named property exists
      if (m_algorithm->existsProperty(it->first))
      {
        const QString pName = QString::fromStdString(it->first);
        const QString value = QString::fromStdString(it->second);
        if (m_errors.contains(pName))
        {
          if (!m_errors[pName].isEmpty())
            m_errors[pName] += "\n";
          m_errors[pName] += value;
        }
        else
          m_errors[pName] = value;
        // There is at least one whole-algo error
        allValid = false;
      }
    }
  }

  // OK all the values have been set once. Time to look for which should be enabled
  this->showValidators();

  return allValid;
}


//-------------------------------------------------------------------------------------------------
/**
 * Return the message string
 * @returns the message string
 */
const QString & AlgorithmDialog::getOptionalMessage() const
{
  return m_strMessage;
}


//-------------------------------------------------------------------------------------------------
/** Add the optional message in a light yellow box to the layout
 *
 * @param mainLay :: layout
 */
void AlgorithmDialog::addOptionalMessage(QVBoxLayout *mainLay)
{
  QLabel *inputMessage = new QLabel(this);
  inputMessage->setFrameStyle(QFrame::Panel | QFrame::Sunken);
  QPalette pal = inputMessage->palette();
  pal.setColor(inputMessage->backgroundRole(), QColor(255,255,224)); // Light yellow
  pal.setColor(inputMessage->foregroundRole(), Qt::black);
  inputMessage->setPalette(pal);
  inputMessage->setAutoFillBackground(true);
  inputMessage->setWordWrap(true);
  inputMessage->setAlignment(Qt::AlignJustify);
  inputMessage->setMargin(3);
  inputMessage->setText(getOptionalMessage());
  QHBoxLayout *msgArea = new QHBoxLayout;
  msgArea->addWidget(inputMessage);
  mainLay->addLayout(msgArea, 0);
}


//-------------------------------------------------------------------------------------------------
/**
 * Was this dialog raised from a script? This is important when deciding what to
 * do with properties that have old input
 * @returns A boolean inidcating whether we are being called from a script
 */
bool AlgorithmDialog::isForScript() const
{
  return m_forScript;
}

/*
 * Is there a message string available
 * @returns A boolean indicating whether the message string is empty
 */
bool AlgorithmDialog::isMessageAvailable() const
{
  return !m_strMessage.isEmpty();
}


//-------------------------------------------------------------------------------------------------
/**
 * Check if the control should be enabled for this property
 * @param propName :: The name of the property
 */
bool AlgorithmDialog::isWidgetEnabled(const QString & propName) const
{
  // To avoid errors
  if( propName.isEmpty() ) return true;

  // Otherwise it must be disabled but only if it is valid
  Mantid::Kernel::Property *property = getAlgorithmProperty(propName);
  if (!property) return true;


  if( !isForScript() )
  {
    // Regular C++ algo. Let the property tell us,
    // possibly using validators, if it is to be shown enabled
    if (property->getSettings())
      return property->getSettings()->isEnabled(getAlgorithm().get());
    else
      return true;
  }
  else
  {
    // Algorithm dialog was called from a script(i.e. Python)
    // Keep things enabled if requested
    if( m_enabled.contains(propName) ) return true;

    /**
    * The control is disabled if
    *   (1) It is contained in the disabled list or
    *   (2) A user passed a value into the dialog
    */
    if( m_disabled.contains(propName) || m_python_arguments.contains(propName) )
    {
      return false;
    }
    else
    {
      return true;
    }
  }

}

//-------------------------------------------------------------------------------------------------
/**
 * UnTie a property
 * @param property :: The name of the property to tie the given widget to
 */
void AlgorithmDialog::untie(const QString & property)
{
  if( m_tied_properties.contains(property) )
  {
    m_tied_properties.remove(property);
  }
}

//-------------------------------------------------------------------------------------------------
/**
 * Tie together an input widget and a property
 * @param widget :: The widget that will collect the input
 * @param property :: The name of the property to tie the given widget to
 * @param parent_layout :: An optional pointer to a QLayout class that is reponsible for managing the passed widget.
 * If given, a validator label will be added for the given input widget
 * @param readHistory :: If true then a history value will be retrieved
 *
 * @return A NULL pointer if a valid label was successfully add to a passed parent_layout otherwise it
 *          returns a pointer to the QLabel instance marking the validity
 */
QWidget* AlgorithmDialog::tie(QWidget* widget, const QString & property, QLayout *parent_layout,
                  bool readHistory)
{
  if( m_tied_properties.contains(property) )
    m_tied_properties.remove(property);

  Mantid::Kernel::Property * prop = getAlgorithmProperty(property);
  if( prop )
  { //Set a few things on the widget
    widget->setToolTip(QString::fromStdString(prop->briefDocumentation()));
  }
  widget->setEnabled(isWidgetEnabled(property));

  PropertyWidget * propWidget = qobject_cast<PropertyWidget*>(widget);

  // Save in the hashes
  m_tied_properties.insert(property, widget);

  // If the widget's layout has been given then assume that a validator is required, else assume not
  QWidget* validlbl(NULL);
  if( parent_layout )
  {
    // Check if the validator is already there
    validlbl = getValidatorMarker(property);
    if( validlbl )
    {
      // Find where it was sitting in the layout
      int item_index;
      if (propWidget)
        item_index = parent_layout->indexOf(propWidget->getMainWidget());
      else
        item_index = parent_layout->indexOf(widget);

      if( QBoxLayout *box = qobject_cast<QBoxLayout*>(parent_layout) )
      {
        box->insertWidget(item_index + 1, validlbl);
      }
      else if( QGridLayout *grid = qobject_cast<QGridLayout*>(parent_layout) )
      {
        int row(0), col(0), span(0);
        grid->getItemPosition(item_index, &row, &col, &span, &span);
        grid->addWidget(validlbl, row, col+2);
      }
      else
      {}
    }
  }
  else
  {
    m_noValidation.append(property);
  }

  if( readHistory )
  {
    setPreviousValue(widget, property);
  }

  return validlbl;
}



//-------------------------------------------------------------------------------------------------
/**
 * Open a file selection box. The type of dialog, i.e. load/save will depend on the
 * property type
 * @param propName :: The property name that this is associated with.
 */
QString AlgorithmDialog::openFileDialog(const QString & propName)
{
  if( propName.isEmpty() ) return "";
  return FilePropertyWidget::openFileDialog( this->getAlgorithmProperty(propName) );
}




//-------------------------------------------------------------------------------------------------
/**
 * Takes a combobox and adds the allowed values of the given property to its list.
 * It also sets the displayed value to the correct one based on either the history
 * or a script input value
 * @param propName :: The name of the property
 * @param optionsBox :: A pointer to a QComoboBox object
 * @returns A newed QComboBox
 */
void AlgorithmDialog::fillAndSetComboBox(const QString & propName, QComboBox* optionsBox) const
{
  if( !optionsBox ) return;
  Mantid::Kernel::Property *property = getAlgorithmProperty(propName);
  if( !property ) return;

  std::vector<std::string> items = property->allowedValues();
  std::vector<std::string>::const_iterator vend = items.end();
  for(std::vector<std::string>::const_iterator vitr = items.begin(); vitr != vend;
      ++vitr)
  {
    optionsBox->addItem(QString::fromStdString(*vitr));
  }

  // Display the appropriate value
  QString displayed("");
  if( !isForScript() )
  {
    displayed = AlgorithmInputHistory::Instance().previousInput(m_algName, propName);
  }
  if( displayed.isEmpty() )
  {
    displayed = QString::fromStdString(property->value());
  }

  int index = optionsBox->findText(displayed);
  if( index >= 0 )
  {
    optionsBox->setCurrentIndex(index);
  }
}


//-------------------------------------------------------------------------------------------------
/**
 * Set the input for a text box based on either the history or a script value
 * @param propName :: The name of the property
 * @param textField :: The QLineEdit field
 */
void AlgorithmDialog::fillLineEdit(const QString & propName, QLineEdit* textField)
{
  if( !isForScript() )
  {
    textField->setText(AlgorithmInputHistory::Instance().previousInput(m_algName, propName));
  }
  else
  {
    Mantid::Kernel::Property *property = getAlgorithmProperty(propName);
    if( property && property->isValid().empty() &&
    ( m_python_arguments.contains(propName) || !property->isDefault() ) )
    {
      textField->setText(QString::fromStdString(property->value()));
    }
  }
}



//-------------------------------------------------------------------------------------------------
/** Layout the buttons and others in the generic dialog */
QLayout *
AlgorithmDialog::createDefaultButtonLayout(const QString & helpText,
                       const QString & loadText,
                       const QString & cancelText,
                       const QString & keepOpenText)
{
  m_okButton = new QPushButton(loadText);
  connect(m_okButton, SIGNAL(clicked()), this, SLOT(accept()));
  m_okButton->setDefault(true);

  m_exitButton = new QPushButton(cancelText);
  connect(m_exitButton, SIGNAL(clicked()), this, SLOT(close()));
  

  QHBoxLayout *buttonRowLayout = new QHBoxLayout;
  buttonRowLayout->addWidget(createHelpButton(helpText));
  buttonRowLayout->addStretch();
  
  m_keepOpenCheckBox = new QCheckBox(keepOpenText);
  m_keepOpenCheckBox->setLayoutDirection(Qt::LayoutDirection::RightToLeft);
  connect(m_keepOpenCheckBox, SIGNAL(stateChanged(int)), this, SLOT(keepOpenChanged(int)));
  buttonRowLayout->addWidget(m_keepOpenCheckBox);
  if (keepOpenText.isEmpty())
  {
    setShowKeepOpen(false);
  }

  buttonRowLayout->addWidget(m_okButton);
  buttonRowLayout->addWidget(m_exitButton);

  return buttonRowLayout;
}


//-------------------------------------------------------------------------------------------------
/**
 * Create a help button that, when clicked, will open a browser to the Mantid wiki page
 * for that algorithm
 */
QPushButton* AlgorithmDialog::createHelpButton(const QString & helpText) const
{
  QPushButton *help = new QPushButton(helpText);
  help->setMaximumWidth(25);
  connect(help, SIGNAL(clicked()), this, SLOT(helpClicked()));
  return help;
}



/**
 * Flag an input workspace widget
 * @param inputWidget :: A widget used to enter the input workspace
 */
void AlgorithmDialog::flagInputWS(QWidget *inputWidget)
{
  m_inputws_opts.push_back(inputWidget);
}

//-----------------------------------------------------------
// Protected slots
//-----------------------------------------------------------
/**
 * A slot that can be used to connect a button that accepts the dialog if
 * all of the properties are valid
 */
void AlgorithmDialog::accept()
{
  // Get property values
  parse();

  //Try and set and validate the properties and
  if( setPropertyValues() )
  {
    //Store input for next time
    saveInput();
    if (!this->m_keepOpen) {
      QDialog::accept();
    }
    else {
       executeAlgorithmAsync();
    }
  }
  else
  {
    QMessageBox::critical(this, "",
              "One or more properties are invalid. The invalid properties are\n"
        "marked with a *, hold your mouse over the * for more information." );
  }
}

//-------------------------------------------------------------------------------------------------

/**
 * A slot to handle the help button click
 */
void AlgorithmDialog::helpClicked()
{
  // determine the version to show
  int version(-1); // the latest version
  if (m_algorithm)
    version = m_algorithm->version();

  // bring up the help window
  HelpWindow::showAlgorithm(this->nativeParentWidget(), m_algName, version);
}

//-------------------------------------------------------------------------------------------------

/**
 * A slot to handle the keep open button click
 */
void AlgorithmDialog::keepOpenChanged(int state)
{
  m_keepOpen = (state == QCheckBox::On);
}


//-------------------------------------------------------------------------------------------------

/**
 * Execute the underlying algorithm
 */
void AlgorithmDialog::executeAlgorithmAsync()
{
  Mantid::API::IAlgorithm_sptr algToExec = m_algorithm;
  try
  {
    // Add any custom AlgorithmObservers to the algorithm
    for(auto it = m_observers.begin(); it != m_observers.end(); ++it) {
      (*it)->observeAll(algToExec);
    }

    // Only need to observe finish events if we are staying open
    if(isShowKeepOpen()) {
      this->observeFinish(algToExec);
      this->observeError(algToExec);
      // Disable close button for a short period. If it is clicked to soon then
      // Mantid crashes - https://github.com/mantidproject/mantid/issues/13836
      if(m_exitButton) {
        m_exitButton->setEnabled(false);
        m_btnTimer.setInterval(1000);
        connect(&m_btnTimer, SIGNAL(timeout()), this,
          SLOT(enableExitButton()));
      }
    }
    else {
      this->stopObserving(algToExec);
    }
    algToExec->executeAsync();
    m_btnTimer.start();

    if (m_okButton) {
      m_okButton->setEnabled(false);
    }
  }
  catch (Poco::NoThreadAvailableException &)
  {
    g_log.error() << "No thread was available to run the " << algToExec->name() << " algorithm in the background." << std::endl;
  }
}

//-------------------------------------------------------------------------------------------------
/*
 */
void AlgorithmDialog::removeAlgorithmFromManager()
{
  using namespace Mantid::API;
  AlgorithmManager::Instance().removeById(m_algorithm->getAlgorithmID());
}

/**
 */
void AlgorithmDialog::enableExitButton() {
  m_exitButton->setEnabled(true);
}

//------------------------------------------------------
// Private member functions
//------------------------------------------------------
/**
 * Parse out information from the dialog
 */
void AlgorithmDialog::parse()
{
  QHashIterator<QString, QWidget*> itr(m_tied_properties);
  while( itr.hasNext() )
  {
    itr.next();
    //Need to do different things depending on the type of the widget. getValue sorts this out
    storePropertyValue(itr.key(), getValue(itr.value()));
  }

  //Now call parseInput, which can be overridden in an inheriting class
  parseInput();
}

//-------------------------------------------------------------------------------------------------
/**
  * Set a list of values for the properties
  * @param presetValues :: A string containing a list of "name=value" pairs with each separated by an '|' character
  */
void AlgorithmDialog::setPresetValues(const QHash<QString,QString> & presetValues)
{
  if( presetValues.isEmpty() ) return;
  QHashIterator<QString,QString> itr(presetValues);
  m_python_arguments.clear();
  while( itr.hasNext() )
  {
    itr.next();
    QString name = itr.key();
    m_python_arguments.append(name);
    QString value = itr.value();
    storePropertyValue(name, value);
  }
  setPropertyValues();
}

//------------------------------------------------------------------------------------------------
/**
 * Set list of enabled and disabled parameter names
 * @param enabled:: A list of parameter names to keep enabled
 * @param disabled:: A list of parameter names whose widgets should be disabled
 */
void AlgorithmDialog::addEnabledAndDisableLists(const QStringList & enabled, const QStringList & disabled)
{
  m_enabled = enabled;
  m_disabled = disabled;
}

//------------------------------------------------------------------------------------------------
/**
 * Returns true if the parameter name has been explicity requested to be kept enabled. If the parameter
 * has been explicity requested to be disabled then return false as well as if neither have been specified
 */
bool AlgorithmDialog::requestedToKeepEnabled(const QString& propName) const
{
  bool enabled(true);
  if( m_disabled.contains(propName) )
  {
    enabled = false;
  }
  else if( m_enabled.contains(propName) ) // Definitely enable
  {
    enabled = true;
  }
  else //Nothing was specified
  {
    enabled = false;
  }
  return enabled;
}

//------------------------------------------------------------------------------------------------
/** Set if we are for a script or not
 * @param forScript :: A boolean indicating whether we are being called from a script */
void AlgorithmDialog::isForScript(bool forScript)
{
  m_forScript = forScript;
}

//------------------------------------------------------------------------------------------------
/**
 * @param on If true the algorithm is executed when "ok" is pressed
 */
void AlgorithmDialog::executeOnAccept(bool on)
{
  if(on)
  {
    connect(this, SIGNAL(accepted()), this, SLOT(executeAlgorithmAsync()));
    connect(this, SIGNAL(rejected()), this, SLOT(removeAlgorithmFromManager()));
  }
  else
  {
    disconnect(this, SIGNAL(accepted()), this, SLOT(executeAlgorithmAsync()));
    disconnect(this, SIGNAL(rejected()), this, SLOT(removeAlgorithmFromManager()));
  }
}

//-------------------------------------------------------------------------------------------------
/** Set an optional message to be displayed at the top of the widget
 * @param message :: The message string */
void AlgorithmDialog::setOptionalMessage(const QString & message)
{
  m_strMessage = message;
  if( message.isEmpty() ) m_strMessage = QString::fromStdString(getAlgorithm()->summary());
  if( m_strMessage.isEmpty() ) m_msgAvailable = false;
  else m_msgAvailable = true;
}

//-------------------------------------------------------------------------------------------------