import_annotations.cpp

#include "import_annotations.h"


#define XML_FORMAT      0
#define ASCIICSV_FORMAT 1
#define DCEVENT_FORMAT  2
#define EDFPLUS_FORMAT  3

#define TAB_CNT         4


UI_ImportAnnotationswindow::UI_ImportAnnotationswindow(QWidget *w_parent)
{
  int i;


  mainwindow = (UI_Mainwindow *)w_parent;

  if(mainwindow->files_open < 1)
  {
    QMessageBox messagewindow(QMessageBox::Critical, "Error", "Can not import annotations without opening an EDF/BDF-file first.");
    messagewindow.exec();
    return;
  }

  ImportAnnotsDialog = new QDialog;

  ImportAnnotsDialog->setMinimumSize(490, 500);
  ImportAnnotsDialog->setMaximumSize(490, 500);
  ImportAnnotsDialog->setWindowTitle("Import annotations/events");
  ImportAnnotsDialog->setModal(true);
  ImportAnnotsDialog->setAttribute(Qt::WA_DeleteOnClose, true);

  tabholder = new QTabWidget;

  tab_index_array[ASCIICSV_FORMAT] = 0;
  tab_index_array[DCEVENT_FORMAT] = 1;
  tab_index_array[XML_FORMAT] = 2;
  tab_index_array[EDFPLUS_FORMAT] = 3;

  for(i=0; i<TAB_CNT; i++)
  {
    tab[i] = new QWidget;
  }

  SeparatorLabel = new QLabel(ImportAnnotsDialog);
  SeparatorLabel->setText("Column separator");
  SeparatorLabel->setMinimumSize(200, 25);

  OnsetColumnLabel = new QLabel(ImportAnnotsDialog);
  OnsetColumnLabel->setText("Onset column");
  OnsetColumnLabel->setMinimumSize(200, 25);

  DatastartLabel = new QLabel(ImportAnnotsDialog);
  DatastartLabel->setText("Data starts at line");
  DatastartLabel->setMinimumSize(200, 25);

  OnsetTimeLabel = new QLabel(ImportAnnotsDialog);
  OnsetTimeLabel->setText("Onset time coding is");
  OnsetTimeLabel->setMinimumSize(200, 25);

  SeparatorLineEdit = new QLineEdit(ImportAnnotsDialog);
  SeparatorLineEdit->setMaxLength(3);
  SeparatorLineEdit->setText("tab");
  SeparatorLineEdit->setMinimumSize(80, 25);

  DescriptionLineEdit = new QLineEdit(ImportAnnotsDialog);
  DescriptionLineEdit->setMaxLength(20);
  DescriptionLineEdit->setEnabled(false);
  DescriptionLineEdit->setMinimumSize(80, 25);

  OnsetColumnSpinBox = new QSpinBox(ImportAnnotsDialog);
  OnsetColumnSpinBox->setRange(1,256);
  OnsetColumnSpinBox->setValue(1);
  OnsetColumnSpinBox->setMinimumSize(80, 25);

  DurationColumnSpinBox = new QSpinBox(ImportAnnotsDialog);
  DurationColumnSpinBox->setRange(1,256);
  DurationColumnSpinBox->setValue(3);
  DurationColumnSpinBox->setMinimumSize(80, 25);

  DescriptionColumnSpinBox = new QSpinBox(ImportAnnotsDialog);
  DescriptionColumnSpinBox->setRange(1,256);
  DescriptionColumnSpinBox->setValue(2);
  DescriptionColumnSpinBox->setMinimumSize(80, 25);

  DatastartSpinbox = new QSpinBox(ImportAnnotsDialog);
  DatastartSpinbox->setRange(1,100);
  DatastartSpinbox->setValue(1);
  DatastartSpinbox->setMinimumSize(80, 25);

  RelativeTimeComboBox = new QComboBox(ImportAnnotsDialog);
  RelativeTimeComboBox->addItem("in seconds, relative to start of file");
  RelativeTimeComboBox->addItem("hh:mm:ss");
  RelativeTimeComboBox->addItem("hh:mm:ss.xxx");
  RelativeTimeComboBox->addItem("yyyy-mm-ddThh:mm:ss");
  RelativeTimeComboBox->addItem("yyyy-mm-ddThh:mm:ss.xxx");
  RelativeTimeComboBox->setMinimumSize(200, 25);

  DescriptionColumnRadioButton = new QRadioButton("Description column");
  DescriptionColumnRadioButton->setMinimumSize(198, 25);
  DescriptionColumnRadioButton->setChecked(true);
  UseManualDescriptionRadioButton = new QRadioButton("Manual description");
  UseManualDescriptionRadioButton->setMinimumSize(198, 25);

  DurationCheckBox = new QCheckBox(" Duration column", ImportAnnotsDialog);
  DurationCheckBox->setTristate(false);
  DurationCheckBox->setCheckState(Qt::Unchecked);
  DurationCheckBox->setMinimumSize(198, 25);

  asciiSettingsHBoxLayout1 = new QHBoxLayout;
  asciiSettingsHBoxLayout1->addWidget(SeparatorLabel);
  asciiSettingsHBoxLayout1->addWidget(SeparatorLineEdit);
  asciiSettingsHBoxLayout1->addStretch(100);

  asciiSettingsHBoxLayout2 = new QHBoxLayout;
  asciiSettingsHBoxLayout2->addWidget(OnsetColumnLabel);
  asciiSettingsHBoxLayout2->addWidget(OnsetColumnSpinBox);
  asciiSettingsHBoxLayout2->addStretch(100);

  asciiSettingsHBoxLayout3 = new QHBoxLayout;
  asciiSettingsHBoxLayout3->addWidget(DescriptionColumnRadioButton);
  asciiSettingsHBoxLayout3->addWidget(DescriptionColumnSpinBox);
  asciiSettingsHBoxLayout3->addStretch(100);

  asciiSettingsHBoxLayout4 = new QHBoxLayout;
  asciiSettingsHBoxLayout4->addWidget(UseManualDescriptionRadioButton);
  asciiSettingsHBoxLayout4->addWidget(DescriptionLineEdit);
  asciiSettingsHBoxLayout4->addStretch(100);

  asciiSettingsHBoxLayout7 = new QHBoxLayout;
  asciiSettingsHBoxLayout7->addWidget(DurationCheckBox);
  asciiSettingsHBoxLayout7->addWidget(DurationColumnSpinBox);
  asciiSettingsHBoxLayout7->addStretch(100);

  asciiSettingsHBoxLayout5 = new QHBoxLayout;
  asciiSettingsHBoxLayout5->addWidget(DatastartLabel);
  asciiSettingsHBoxLayout5->addWidget(DatastartSpinbox);
  asciiSettingsHBoxLayout5->addStretch(100);

  asciiSettingsHBoxLayout6 = new QHBoxLayout;
  asciiSettingsHBoxLayout6->addWidget(OnsetTimeLabel);
  asciiSettingsHBoxLayout6->addWidget(RelativeTimeComboBox);
  asciiSettingsHBoxLayout6->addStretch(100);

  asciiSettingsVBoxLayout = new QVBoxLayout;
  asciiSettingsVBoxLayout->addLayout(asciiSettingsHBoxLayout1);
  asciiSettingsVBoxLayout->addLayout(asciiSettingsHBoxLayout2);
  asciiSettingsVBoxLayout->addLayout(asciiSettingsHBoxLayout3);
  asciiSettingsVBoxLayout->addLayout(asciiSettingsHBoxLayout4);
  asciiSettingsVBoxLayout->addLayout(asciiSettingsHBoxLayout7);
  asciiSettingsVBoxLayout->addLayout(asciiSettingsHBoxLayout5);
  asciiSettingsVBoxLayout->addLayout(asciiSettingsHBoxLayout6);
  tab[tab_index_array[ASCIICSV_FORMAT]]->setLayout(asciiSettingsVBoxLayout);

  DCEventSignalLabel = new QLabel(ImportAnnotsDialog);
  DCEventSignalLabel->setText("Signal");
  DCEventSignalLabel->setMinimumSize(130, 25);

  DCEventBitTimeLabel = new QLabel(ImportAnnotsDialog);
  DCEventBitTimeLabel->setText("Bit Time");
  DCEventBitTimeLabel->setMinimumSize(130, 25);

  DCEventTriggerLevelLabel = new QLabel(ImportAnnotsDialog);
  DCEventTriggerLevelLabel->setText("Trigger Level");
  DCEventTriggerLevelLabel->setMinimumSize(130, 25);

  DCEventSignalComboBox = new QComboBox(ImportAnnotsDialog);
  for(i=0; i<mainwindow->signalcomps; i++)
  {
    DCEventSignalComboBox->addItem(mainwindow->signalcomp[i]->signallabel);
  }
  DCEventSignalComboBox->setMinimumSize(130, 25);

  BitTimeSpinbox = new QSpinBox(ImportAnnotsDialog);
  BitTimeSpinbox->setRange(1,1000);
  BitTimeSpinbox->setSuffix(" mS");
  BitTimeSpinbox->setValue(10);
  BitTimeSpinbox->setMinimumSize(130, 25);

  DCEventTriggerLevelSpinBox = new QDoubleSpinBox(ImportAnnotsDialog);
  DCEventTriggerLevelSpinBox->setDecimals(3);
  DCEventTriggerLevelSpinBox->setRange(-10000.0, 10000.0);
  DCEventTriggerLevelSpinBox->setValue(500.0);
  DCEventTriggerLevelSpinBox->setMinimumSize(130, 25);

  if(mainwindow->signalcomps)
  {
    DCEventSignalChanged(0);
  }

  DCEventHBoxLayout1 = new QHBoxLayout;
  DCEventHBoxLayout1->addWidget(DCEventSignalLabel);
  DCEventHBoxLayout1->addWidget(DCEventSignalComboBox);
  DCEventHBoxLayout1->addStretch(2);

  DCEventHBoxLayout2 = new QHBoxLayout;
  DCEventHBoxLayout2->addWidget(DCEventBitTimeLabel);
  DCEventHBoxLayout2->addWidget(BitTimeSpinbox);
  DCEventHBoxLayout2->addStretch(2);

  DCEventHBoxLayout3 = new QHBoxLayout;
  DCEventHBoxLayout3->addWidget(DCEventTriggerLevelLabel);
  DCEventHBoxLayout3->addWidget(DCEventTriggerLevelSpinBox);
  DCEventHBoxLayout3->addStretch(2);

  DCEventVBoxLayout = new QVBoxLayout;
  DCEventVBoxLayout->addStretch(10);
  DCEventVBoxLayout->addLayout(DCEventHBoxLayout1);
  DCEventVBoxLayout->addStretch(2);
  DCEventVBoxLayout->addLayout(DCEventHBoxLayout2);
  DCEventVBoxLayout->addStretch(2);
  DCEventVBoxLayout->addLayout(DCEventHBoxLayout3);
  DCEventVBoxLayout->addStretch(10);

  tab[tab_index_array[DCEVENT_FORMAT]]->setLayout(DCEventVBoxLayout);

  tabholder->addTab(tab[tab_index_array[ASCIICSV_FORMAT]], "ASCII / CSV");
  tabholder->addTab(tab[tab_index_array[DCEVENT_FORMAT]],  "DC-event (8-bit serial code)");
  tabholder->addTab(tab[tab_index_array[XML_FORMAT]],      "XML");
  tabholder->addTab(tab[tab_index_array[EDFPLUS_FORMAT]],  "EDF+ / BDF+");

  IgnoreConsecutiveCheckBox = new QCheckBox(" Ignore consecutive events with the\n same description");
  IgnoreConsecutiveCheckBox->setMinimumSize(300, 40);
  IgnoreConsecutiveCheckBox->setTristate(false);
  IgnoreConsecutiveCheckBox->setCheckState(Qt::Unchecked);

  ImportButton = new QPushButton(ImportAnnotsDialog);
  ImportButton->setMinimumSize(80, 25);
  ImportButton->setText("Import");

  CloseButton = new QPushButton(ImportAnnotsDialog);
  CloseButton->setMinimumSize(80, 25);
  CloseButton->setText("Cancel");

  horLayout = new QHBoxLayout;
  horLayout->addSpacing(30);
  horLayout->addWidget(ImportButton, 1);
  horLayout->addSpacing(300);
  horLayout->addWidget(CloseButton, 1);
  horLayout->addSpacing(30);

  mainLayout = new QVBoxLayout;
  mainLayout->addWidget(tabholder, 300);
  mainLayout->addSpacing(30);
  mainLayout->addWidget(IgnoreConsecutiveCheckBox, 30);
  mainLayout->addSpacing(30);
  mainLayout->addLayout(horLayout, 30);

  ImportAnnotsDialog->setLayout(mainLayout);

  SeparatorLineEdit->setText(mainwindow->import_annotations_var->separator);
  OnsetColumnSpinBox->setValue(mainwindow->import_annotations_var->onsetcolumn);
  DescriptionColumnSpinBox->setValue(mainwindow->import_annotations_var->descriptioncolumn);
  DescriptionLineEdit->setText(mainwindow->import_annotations_var->description);
  DurationColumnSpinBox->setValue(mainwindow->import_annotations_var->durationcolumn);
  DatastartSpinbox->setValue(mainwindow->import_annotations_var->datastartline);
  RelativeTimeComboBox->setCurrentIndex(mainwindow->import_annotations_var->onsettimeformat);
  BitTimeSpinbox->setValue(mainwindow->import_annotations_var->dceventbittime);
  DCEventTriggerLevelSpinBox->setValue(mainwindow->import_annotations_var->triggerlevel);

  if(mainwindow->import_annotations_var->manualdescription == 0)
  {
    DescriptionColumnRadioButton->setChecked(true);
    DescriptionColumnSpinBox->setEnabled(true);
    DescriptionLineEdit->setEnabled(false);
  }
  else
  {
    UseManualDescriptionRadioButton->setChecked(true);
    DescriptionColumnSpinBox->setEnabled(false);
    DescriptionLineEdit->setEnabled(true);
    if(mainwindow->import_annotations_var->format == ASCIICSV_FORMAT)
    {
      IgnoreConsecutiveCheckBox->setEnabled(false);
    }
  }

  if(mainwindow->import_annotations_var->useduration == 1)
  {
    DurationCheckBox->setCheckState(Qt::Checked);
    DurationColumnSpinBox->setEnabled(true);
  }
  else
  {
    DurationCheckBox->setCheckState(Qt::Unchecked);
    DurationColumnSpinBox->setEnabled(false);
  }

  if(mainwindow->import_annotations_var->ignoreconsecutive == 1)
  {
    IgnoreConsecutiveCheckBox->setCheckState(Qt::Checked);
  }
  else
  {
    IgnoreConsecutiveCheckBox->setCheckState(Qt::Unchecked);
  }

  if(mainwindow->import_annotations_var->format == EDFPLUS_FORMAT)
  {
    IgnoreConsecutiveCheckBox->setEnabled(false);
  }

  tabholder->setCurrentIndex(tab_index_array[mainwindow->import_annotations_var->format]);

  QObject::connect(CloseButton,                     SIGNAL(clicked()),                ImportAnnotsDialog, SLOT(close()));
  QObject::connect(ImportButton,                    SIGNAL(clicked()),                this,               SLOT(ImportButtonClicked()));
  QObject::connect(DCEventSignalComboBox,           SIGNAL(currentIndexChanged(int)), this,               SLOT(DCEventSignalChanged(int)));
  QObject::connect(DescriptionColumnRadioButton,    SIGNAL(toggled(bool)),            this,               SLOT(descriptionRadioButtonClicked(bool)));
  QObject::connect(UseManualDescriptionRadioButton, SIGNAL(toggled(bool)),            this,               SLOT(descriptionRadioButtonClicked(bool)));
  QObject::connect(DurationCheckBox,                SIGNAL(stateChanged(int)),        this,               SLOT(DurationCheckBoxChanged(int)));
  QObject::connect(tabholder,                       SIGNAL(currentChanged(int)),      this,               SLOT(TabChanged(int)));

  ImportAnnotsDialog->exec();
}


void UI_ImportAnnotationswindow::DurationCheckBoxChanged(int state)
{
  if(state == Qt::Unchecked)
  {
    DurationColumnSpinBox->setEnabled(false);
  }
  else
  {
    DurationColumnSpinBox->setEnabled(true);
  }
}


void UI_ImportAnnotationswindow::descriptionRadioButtonClicked(bool)
{
  if(DescriptionColumnRadioButton->isChecked() == true)
  {
    DescriptionColumnSpinBox->setEnabled(true);
    DescriptionLineEdit->setEnabled(false);
    IgnoreConsecutiveCheckBox->setEnabled(true);
  }

  if(UseManualDescriptionRadioButton->isChecked() == true)
  {
    DescriptionColumnSpinBox->setEnabled(false);
    DescriptionLineEdit->setEnabled(true);
    IgnoreConsecutiveCheckBox->setEnabled(false);
  }
}


void UI_ImportAnnotationswindow::TabChanged(int index)
{
  if((index == tab_index_array[XML_FORMAT]) || (index == tab_index_array[DCEVENT_FORMAT]))
  {
    IgnoreConsecutiveCheckBox->setEnabled(true);
  }

  if(index == tab_index_array[EDFPLUS_FORMAT])
  {
    IgnoreConsecutiveCheckBox->setEnabled(false);
  }

  if(index == tab_index_array[ASCIICSV_FORMAT])
  {
    if(UseManualDescriptionRadioButton->isChecked() == true)
    {
      IgnoreConsecutiveCheckBox->setEnabled(false);
    }
    else
    {
      IgnoreConsecutiveCheckBox->setEnabled(true);
    }
  }
}


void UI_ImportAnnotationswindow::DCEventSignalChanged(int index)
{
  char scratchpad[64];


  if((index < 0) || (!mainwindow->signalcomps))
  {
    DCEventTriggerLevelSpinBox->setSuffix("");

    return;
  }

  strcpy(scratchpad, " ");
  strcat(scratchpad, mainwindow->signalcomp[index]->physdimension);

  DCEventTriggerLevelSpinBox->setSuffix(scratchpad);
}


void UI_ImportAnnotationswindow::ImportButtonClicked()
{
  int i,
      input_format,
      error=0;


  ImportAnnotsDialog->setEnabled(false);

  i = tabholder->currentIndex();

  for(input_format = 0; input_format < TAB_CNT; input_format++)
  {
    if(tab_index_array[input_format] == i)
    {
      break;
    }
  }

  if(input_format >= TAB_CNT)
  {
    QMessageBox messagewindow(QMessageBox::Critical, "Error", "Internal error (input_format >= TAB_CNT).");
    messagewindow.exec();
    ImportAnnotsDialog->setEnabled(true);
    return;
  }

  mainwindow->import_annotations_var->format = input_format;

  if(input_format == DCEVENT_FORMAT)
  {
    error = import_from_dcevent();
  }

  if(input_format == EDFPLUS_FORMAT)
  {
    error = import_from_edfplus();
  }

  if(input_format == XML_FORMAT)
  {
    error = import_from_xml();
  }

  if(input_format == ASCIICSV_FORMAT)
  {
    error = import_from_ascii();
  }

  if(mainwindow->annotations_dock[0] == NULL)
  {
    mainwindow->annotations_dock[0] = new UI_Annotationswindow(0, mainwindow);

    mainwindow->addDockWidget(Qt::RightDockWidgetArea, mainwindow->annotations_dock[0]->docklist, Qt::Vertical);

    if(!mainwindow->annotationlist[0])
    {
      mainwindow->annotations_dock[0]->docklist->hide();
    }
  }

  if(mainwindow->annotationlist[0])
  {
    mainwindow->annotations_dock[0]->docklist->show();

    mainwindow->annotations_edited = 1;

    mainwindow->annotations_dock[0]->updateList();

    mainwindow->save_act->setEnabled(true);
  }

  mainwindow->maincurve->update();

  if(!error)
  {
    QMessageBox messagewindow(QMessageBox::Information, "Ready", "Done.");
    messagewindow.setIconPixmap(QPixmap(":/images/ok.png"));
    messagewindow.exec();
  }

  ImportAnnotsDialog->setEnabled(true);

  if(!error)
  {
    ImportAnnotsDialog->close();
  }
}


int UI_ImportAnnotationswindow::import_from_xml(void)
{
  int i, j,
      digits,
      ignore_consecutive=0;

  char path[MAX_PATH_LENGTH],
       last_description[256],
       result[XML_STRBUFLEN],
       duration[32];

  long long onset=0LL,
            l_temp,
            utc_time=0LL;

  struct annotationblock *annotation;

  struct date_time_struct date_time;

  struct xml_handle *xml_hdl;


  duration[0] = 0;

  last_description[0] = 0;

  if(IgnoreConsecutiveCheckBox->checkState() == Qt::Checked)
  {
    ignore_consecutive = 1;
  }
  else
  {
    ignore_consecutive = 0;
  }

  strcpy(path, QFileDialog::getOpenFileName(0, "Open XML file", QString::fromLocal8Bit(mainwindow->recent_opendir), "XML files (*.xml *.XML)").toLocal8Bit().data());

  if(!strcmp(path, ""))
  {
    return(1);
  }

  get_directory_from_path(mainwindow->recent_opendir, path, MAX_PATH_LENGTH);

  if(mainwindow->annotationlist_backup==NULL)
  {
    mainwindow->annotationlist_backup = edfplus_annotation_copy_list(&mainwindow->annotationlist[0]);
  }

  xml_hdl = xml_get_handle(path);
  if(xml_hdl==NULL)
  {
    QMessageBox messagewindow(QMessageBox::Critical, "Error", "Can not open file for reading.");
    messagewindow.exec();
    return(1);
  }

  if((xml_hdl->encoding != 1) && (xml_hdl->encoding != 2))
  {
    QMessageBox messagewindow(QMessageBox::Critical, "Error", "Encoding of XML-file must be UTF-8 or ISO-8859-1.");
    messagewindow.exec();
    xml_close(xml_hdl);
    return(1);
  }

  if(strcmp(xml_hdl->elementname[xml_hdl->level], "annotationlist"))
  {
    QMessageBox messagewindow(QMessageBox::Critical, "Error", "Can not find root element \"annotationlist\".");
    messagewindow.exec();
    xml_close(xml_hdl);
    return(1);
  }

  QApplication::setOverrideCursor(Qt::WaitCursor);

  for(j=0; j<10; j++)  qApp->processEvents();

  for(i=0; i<10000; i++)
  {
    if(xml_goto_nth_element_inside(xml_hdl, "annotation", i))
    {
      if(i == 0)
      {
        QApplication::restoreOverrideCursor();
        QMessageBox messagewindow(QMessageBox::Critical, "Error", "Can not find child element \"annotation\".");
        messagewindow.exec();
        xml_close(xml_hdl);
        return(1);
      }

      break;
    }

    if(xml_goto_nth_element_inside(xml_hdl, "onset", 0))
    {
      xml_go_up(xml_hdl);
      continue;
    }

    if(xml_get_content_of_element(xml_hdl, result, XML_STRBUFLEN))
    {
      QApplication::restoreOverrideCursor();
      QMessageBox messagewindow(QMessageBox::Critical, "Error", "Can not get content of element \"annotation\".");
      messagewindow.exec();
      xml_close(xml_hdl);
      return(1);
    }

    if(strlen(result) > 17)
    {
      if((result[4] == '-') && (result[7] == '-') && (result[10] == 'T') && (result[13] == ':') && (result[16] == ':'))
      {
        date_time.year = atoi(result);
        date_time.month = atoi(result + 5);
        date_time.day = atoi(result + 8);
        date_time.hour = atoi(result + 11);
        date_time.minute = atoi(result + 14);
        date_time.second = atoi(result + 17);
        date_time_to_utc(&utc_time, date_time);
        onset = utc_time - mainwindow->edfheaderlist[0]->utc_starttime;
        onset *= TIME_DIMENSION;

        if(strlen(result) > 19)
        {
          if(result[19] == '.')
          {
            for(digits=0; digits<32; digits++)
            {
              if((result[20 + digits] < '0') || (result[20 + digits] > '9'))
              {
                break;
              }
            }
            result[20 + digits] = 0;
            if(digits)
            {
              l_temp = (atoi(result + 20) * TIME_DIMENSION);
              for(; digits>0; digits--)
              {
                l_temp /= 10LL;
              }
              onset += l_temp;
            }
          }
          else
          {
            xml_go_up(xml_hdl);
            continue;
          }
        }
      }
    }
    else
    {
      xml_go_up(xml_hdl);
      continue;
    }

    xml_go_up(xml_hdl);

    if(!xml_goto_nth_element_inside(xml_hdl, "duration", 0))
    {
      if(xml_get_content_of_element(xml_hdl, result, XML_STRBUFLEN))
      {
        QApplication::restoreOverrideCursor();
        QMessageBox messagewindow(QMessageBox::Critical, "Error", "Can not get content of element \"duration\".");
        messagewindow.exec();
        xml_close(xml_hdl);
        return(1);
      }

      strncpy(duration, result, 16);
      duration[15] = 0;
      if((!(is_number(duration))) && (duration[0] != '-'))
      {
        remove_trailing_zeros(duration);
      }
      else
      {
        duration[0] = 0;
      }

      xml_go_up(xml_hdl);
    }

    if(xml_goto_nth_element_inside(xml_hdl, "description", 0))
    {
      xml_go_up(xml_hdl);
      continue;
    }

    if(xml_get_content_of_element(xml_hdl, result, XML_STRBUFLEN))
    {
      QApplication::restoreOverrideCursor();
      QMessageBox messagewindow(QMessageBox::Critical, "Error", "Can not get content of element \"description\".");
      messagewindow.exec();
      xml_close(xml_hdl);
      return(1);
    }

    if((!ignore_consecutive) || (strcmp(result, last_description)))
    {
      annotation = (struct annotationblock *)calloc(1, sizeof(struct annotationblock));
      if(annotation == NULL)
      {
        QApplication::restoreOverrideCursor();
        QMessageBox messagewindow(QMessageBox::Critical, "Error", "A memory allocation error occurred (annotation).");
        messagewindow.exec();
        xml_close(xml_hdl);
        return(1);
      }
      annotation->onset = onset;
      strncpy(annotation->annotation, result, MAX_ANNOTATION_LEN);
      if(xml_hdl->encoding == 1)
      {
        latin1_to_utf8(annotation->annotation, MAX_ANNOTATION_LEN);
      }
      annotation->annotation[MAX_ANNOTATION_LEN] = 0;
      strcpy(annotation->duration, duration);
      edfplus_annotation_add_item(&mainwindow->annotationlist[0], annotation);

      strcpy(last_description, result);
    }

    xml_go_up(xml_hdl);

    xml_go_up(xml_hdl);
  }

  xml_close(xml_hdl);

  QApplication::restoreOverrideCursor();

  return(0);
}


int UI_ImportAnnotationswindow::import_from_ascii(void)
{
  int i, j,
      temp,
      column,
      column_end,
      str_start,
      line_nr,
      startline=1,
      onset_column=1,
      descr_column=2,
      duration_column=3,
      onset_is_set,
      descr_is_set,
      duration_is_set,
      max_descr_length,
      onsettime_coding=0,
      digits,
      days=0,
      ignore_consecutive=0,
      use_duration=0,
      manualdescription;

  char path[MAX_PATH_LENGTH],
       line[2048],
       scratchpad[256],
       str[2048],
       separator=',',
       description[256],
       last_description[256],
       duration[32];

  long long onset=0LL,
            l_temp,
            last_onset=0LL,
            utc_time=0LL;

  FILE *inputfile=NULL;

  struct annotationblock *annotation;

  struct date_time_struct date_time;


  max_descr_length = 20;

  description[0] = 0;

  duration[0] = 0;

  last_description[0] = 0;

  if(UseManualDescriptionRadioButton->isChecked() == true)
  {
    manualdescription = 1;

    strcpy(description, DescriptionLineEdit->text().toLatin1().data());
  }
  else
  {
    manualdescription = 0;
  }

  strcpy(str, SeparatorLineEdit->text().toLatin1().data());

  if(!strcmp(str, "tab"))
  {
    separator = '\t';
  }
  else
  {
    if(strlen(str)!=1)
    {
      QMessageBox messagewindow(QMessageBox::Critical, "Invalid input", "Separator must be one character or \"tab\".");
      messagewindow.exec();
      return(1);
    }

    if((str[0]<32)||(str[0]>126))
    {
      QMessageBox messagewindow(QMessageBox::Critical, "Invalid input", "Separator character is not a valid ASCII character.");
      messagewindow.exec();
      return(1);
    }

    if(str[0]=='.')
    {
      QMessageBox messagewindow(QMessageBox::Critical, "Invalid input", "Separator character can not be a dot.");
      messagewindow.exec();
      return(1);
    }

    if((str[0]>47)&&(str[0]<58))
    {
      QMessageBox messagewindow(QMessageBox::Critical, "Invalid input", "Separator character can not be a number.");
      messagewindow.exec();
      return(1);
    }

    separator = str[0];
  }

  strcpy(mainwindow->import_annotations_var->separator, str);

  startline = DatastartSpinbox->value();

  descr_column = DescriptionColumnSpinBox->value() - 1;

  onset_column = OnsetColumnSpinBox->value() - 1;

  duration_column = DurationColumnSpinBox->value() - 1;

  onsettime_coding = RelativeTimeComboBox->currentIndex();

  if(DurationCheckBox->checkState() == Qt::Checked)
  {
    use_duration = 1;
  }
  else
  {
    use_duration = 0;
  }

  if((descr_column == onset_column) && (!manualdescription))
  {
    QMessageBox messagewindow(QMessageBox::Critical, "Invalid input", "Onset and Description can not be in the same column.");
    messagewindow.exec();
    return(1);
  }

  if((duration_column == onset_column) && use_duration)
  {
    QMessageBox messagewindow(QMessageBox::Critical, "Invalid input", "Onset and Duration can not be in the same column.");
    messagewindow.exec();
    return(1);
  }

  if((descr_column == duration_column) && (!manualdescription) && use_duration)
  {
    QMessageBox messagewindow(QMessageBox::Critical, "Invalid input", "Duration and Description can not be in the same column.");
    messagewindow.exec();
    return(1);
  }

  mainwindow->import_annotations_var->onsettimeformat = onsettime_coding;
  mainwindow->import_annotations_var->onsetcolumn = onset_column + 1;
  mainwindow->import_annotations_var->descriptioncolumn = descr_column + 1;
  mainwindow->import_annotations_var->durationcolumn = duration_column + 1;
  mainwindow->import_annotations_var->useduration = use_duration;
  mainwindow->import_annotations_var->datastartline = startline;
  if(UseManualDescriptionRadioButton->isChecked() == true)
  {
    mainwindow->import_annotations_var->manualdescription = 1;
  }
  else
  {
    mainwindow->import_annotations_var->manualdescription = 0;
  }
  strcpy(mainwindow->import_annotations_var->description, DescriptionLineEdit->text().toLatin1().data());

  if(IgnoreConsecutiveCheckBox->checkState() == Qt::Checked)
  {
    ignore_consecutive = 1;
  }
  else
  {
    ignore_consecutive = 0;
  }

  mainwindow->import_annotations_var->ignoreconsecutive = ignore_consecutive;

  strcpy(path, QFileDialog::getOpenFileName(0, "Open ASCII file", QString::fromLocal8Bit(mainwindow->recent_opendir), "ASCII files (*.txt *.TXT *.csv *.CSV)").toLocal8Bit().data());

  if(!strcmp(path, ""))
  {
    return(1);
  }

  get_directory_from_path(mainwindow->recent_opendir, path, MAX_PATH_LENGTH);

  if(mainwindow->annotationlist_backup==NULL)
  {
    mainwindow->annotationlist_backup = edfplus_annotation_copy_list(&mainwindow->annotationlist[0]);
  }

  inputfile = fopeno(path, "rb");
  if(inputfile==NULL)
  {
    QMessageBox messagewindow(QMessageBox::Critical, "Error", "Can not open file for reading.");
    messagewindow.exec();
    return(1);
  }

  rewind(inputfile);

  QApplication::setOverrideCursor(Qt::WaitCursor);

  for(j=0; j<10; j++)  qApp->processEvents();

  for(i=0; i<(startline-1);)
  {
    temp = fgetc(inputfile);

    if(temp==EOF)
    {
      QApplication::restoreOverrideCursor();
      QMessageBox messagewindow(QMessageBox::Critical, "Error", "File does not contain enough lines.");
      messagewindow.exec();
      fclose(inputfile);
      return(1);
    }

    if(temp=='\n')
    {
      i++;
    }
  }

  i = 0;

  column = 0;

  column_end = 1;

  str_start = 0;

  line_nr = startline;

  onset_is_set = 0;

  descr_is_set = 0;

  duration_is_set = 0;

  while(1)
  {
    temp = fgetc(inputfile);

    if(temp==EOF)
    {
      break;
    }

    line[i] = temp;

    if(line[i]=='\r')
    {
      continue;
    }

    if(separator!=',')
    {
      if(line[i]==',')
      {
        line[i] = '.';
      }
    }

    if(line[i]==separator)
    {
      line[i] = 0;

      if(!column_end)
      {
        if(column == onset_column)
        {
          onset = 0LL;
          strncpy(scratchpad, line + str_start, 30);
          scratchpad[30] = 0;

          if(onsettime_coding == 0)
          {
            onset = atoll_x(scratchpad, TIME_DIMENSION);
            onset += mainwindow->edfheaderlist[0]->starttime_offset;

            onset_is_set = 1;
          }

          if(onsettime_coding == 1)
          {
            if(strlen(scratchpad) > 6)
            {
              if((scratchpad[2] == ':') && (scratchpad[5] == ':'))
              {
                scratchpad[8] = 0;
                onset = atoi(scratchpad) * 3600LL;
                onset += (atoi(scratchpad + 3) * 60LL);
                onset += (long long)(atoi(scratchpad + 6));
                onset *= TIME_DIMENSION;
                onset -= mainwindow->edfheaderlist[0]->l_starttime;
                if(onset < last_onset)
                {
                  last_onset = onset;
                  days++;
                }

                onset_is_set = 1;
              }
            }
            if(strlen(scratchpad) > 5)
            {
              if((scratchpad[1] == ':') && (scratchpad[4] == ':'))
              {
                scratchpad[7] = 0;
                onset = atoi(scratchpad) * 3600LL;
                onset += (atoi(scratchpad + 2) * 60LL);
                onset += (long long)(atoi(scratchpad + 5));
                onset *= TIME_DIMENSION;
                onset -= mainwindow->edfheaderlist[0]->l_starttime;
                if(onset < last_onset)
                {
                  last_onset = onset;
                  days++;
                }

                onset_is_set = 1;
              }
            }
          }

          if(onsettime_coding == 2)
          {
            if(strlen(scratchpad) > 8)
            {
              if((scratchpad[2] == ':') && (scratchpad[5] == ':') && ((scratchpad[8] == '.') || (scratchpad[8] == ',')))
              {
                for(digits=0; digits<32; digits++)
                {
                  if((scratchpad[9 + digits] < '0') || (scratchpad[9 + digits] > '9'))
                  {
                    break;
                  }
                }
                scratchpad[9 + digits] = 0;
                onset = atoi(scratchpad) * 3600LL;
                onset += (atoi(scratchpad + 3) * 60LL);
                onset += (long long)(atoi(scratchpad + 6));
                onset *= TIME_DIMENSION;
                if(digits)
                {
                  l_temp = (atoi(scratchpad + 9) * TIME_DIMENSION);
                  for(; digits>0; digits--)
                  {
                    l_temp /= 10LL;
                  }
                  onset += l_temp;
                }
                onset -= mainwindow->edfheaderlist[0]->l_starttime;
                if(onset < last_onset)
                {
                  last_onset = onset;
                  days++;
                }

                onset_is_set = 1;
              }
            }
            if(strlen(scratchpad) > 7)
            {
              if((scratchpad[1] == ':') && (scratchpad[4] == ':') && ((scratchpad[7] == '.') || (scratchpad[7] == ',')))
              {
                for(digits=0; digits<32; digits++)
                {
                  if((scratchpad[8 + digits] < '0') || (scratchpad[8 + digits] > '9'))
                  {
                    break;
                  }
                }
                scratchpad[8 + digits] = 0;
                onset = atoi(scratchpad) * 3600LL;
                onset += (atoi(scratchpad + 2) * 60LL);
                onset += (long long)(atoi(scratchpad + 5));
                onset *= TIME_DIMENSION;
                if(digits)
                {
                  l_temp = (atoi(scratchpad + 8) * TIME_DIMENSION);
                  for(; digits>0; digits--)
                  {
                    l_temp /= 10LL;
                  }
                  onset += l_temp;
                }
                onset -= mainwindow->edfheaderlist[0]->l_starttime;
                if(onset < last_onset)
                {
                  last_onset = onset;
                  days++;
                }

                onset_is_set = 1;
              }
            }
          }

          if(onsettime_coding == 3)
          {
            if(strlen(scratchpad) > 17)
            {
              if((scratchpad[4] == '-') && (scratchpad[7] == '-') && (scratchpad[13] == ':') && (scratchpad[16] == ':'))
              {
                scratchpad[19] = 0;
                date_time.year = atoi(scratchpad);
                date_time.month = atoi(scratchpad + 5);
                date_time.day = atoi(scratchpad + 8);
                date_time.hour = atoi(scratchpad + 11);
                date_time.minute = atoi(scratchpad + 14);
                date_time.second = atoi(scratchpad + 17);
                date_time_to_utc(&utc_time, date_time);
                onset = utc_time - mainwindow->edfheaderlist[0]->utc_starttime;
                onset *= TIME_DIMENSION;
                onset_is_set = 1;
              }
            }
          }

          if(onsettime_coding == 4)
          {
            if(strlen(scratchpad) > 19)
            {
              if((scratchpad[4] == '-') && (scratchpad[7] == '-') && (scratchpad[13] == ':') && (scratchpad[16] == ':') && ((scratchpad[19] == ',') || (scratchpad[19] == '.')))
              {
                for(digits=0; digits<32; digits++)
                {
                  if((scratchpad[20 + digits] < '0') || (scratchpad[20 + digits] > '9'))
                  {
                    break;
                  }
                }
                scratchpad[20 + digits] = 0;
                date_time.year = atoi(scratchpad);
                date_time.month = atoi(scratchpad + 5);
                date_time.day = atoi(scratchpad + 8);
                date_time.hour = atoi(scratchpad + 11);
                date_time.minute = atoi(scratchpad + 14);
                date_time.second = atoi(scratchpad + 17);
                date_time_to_utc(&utc_time, date_time);
                onset = utc_time - mainwindow->edfheaderlist[0]->utc_starttime;
                onset *= TIME_DIMENSION;
                if(digits)
                {
                  l_temp = (atoi(scratchpad + 20) * TIME_DIMENSION);
                  for(; digits>0; digits--)
                  {
                    l_temp /= 10LL;
                  }
                  onset += l_temp;
                }

                onset_is_set = 1;
              }
            }
          }
        }

        if((!manualdescription) && (column == descr_column))
        {
          strncpy(description, line + str_start, max_descr_length);
          description[max_descr_length] = 0;
          latin1_to_utf8(description, max_descr_length);
          descr_is_set = 1;
        }

        if((use_duration) && (column == duration_column))
        {
          strncpy(duration, line + str_start, 16);
          duration[15] = 0;

          duration_is_set = 1;
        }

        column_end = 1;

        column++;
      }
    }
    else
    {
      if(line[i]!='\n')
      {
        if(column_end)
        {
          str_start = i;

          column_end = 0;
        }
      }
    }

    if(line[i]=='\n')
    {
      line[i] = 0;

      if(!column_end)
      {
        if(column == onset_column)
        {
          if((descr_is_set) || (manualdescription))
          {
            onset = 0LL;
            strncpy(scratchpad, line + str_start, 30);
            scratchpad[30] = 0;

            if(onsettime_coding == 0)
            {
              onset = atoll_x(scratchpad, TIME_DIMENSION);
              onset += mainwindow->edfheaderlist[0]->starttime_offset;

              onset_is_set = 1;
            }

            if(onsettime_coding == 1)
            {
              if(strlen(scratchpad) > 6)
              {
                if((scratchpad[2] == ':') && (scratchpad[5] == ':'))
                {
                  scratchpad[8] = 0;
                  onset = atoi(scratchpad) * 3600LL;
                  onset += (atoi(scratchpad + 3) * 60LL);
                  onset += (long long)(atoi(scratchpad + 6));
                  onset *= TIME_DIMENSION;
                  onset -= mainwindow->edfheaderlist[0]->l_starttime;
                  if(onset < last_onset)
                  {
                    last_onset = onset;
                    days++;
                  }

                  onset_is_set = 1;
                }
              }
              if(strlen(scratchpad) > 5)
              {
                if((scratchpad[1] == ':') && (scratchpad[4] == ':'))
                {
                  scratchpad[7] = 0;
                  onset = atoi(scratchpad) * 3600LL;
                  onset += (atoi(scratchpad + 2) * 60LL);
                  onset += (long long)(atoi(scratchpad + 5));
                  onset *= TIME_DIMENSION;
                  onset -= mainwindow->edfheaderlist[0]->l_starttime;
                  if(onset < last_onset)
                  {
                    last_onset = onset;
                    days++;
                  }

                  onset_is_set = 1;
                }
              }
            }

            if(onsettime_coding == 2)
            {
              if(strlen(scratchpad) > 8)
              {
                if((scratchpad[2] == ':') && (scratchpad[5] == ':') && ((scratchpad[8] == '.') || (scratchpad[8] == ',')))
                {
                  for(digits=0; digits<32; digits++)
                  {
                    if((scratchpad[9 + digits] < '0') || (scratchpad[9 + digits] > '9'))
                    {
                      break;
                    }
                  }
                  scratchpad[9 + digits] = 0;
                  onset = atoi(scratchpad) * 3600LL;
                  onset += (atoi(scratchpad + 3) * 60LL);
                  onset += (long long)(atoi(scratchpad + 6));
                  onset *= TIME_DIMENSION;
                  if(digits)
                  {
                    l_temp = (atoi(scratchpad + 9) * TIME_DIMENSION);
                    for(; digits>0; digits--)
                    {
                      l_temp /= 10LL;
                    }
                    onset += l_temp;
                  }
                  onset -= mainwindow->edfheaderlist[0]->l_starttime;
                  if(onset < last_onset)
                  {
                    last_onset = onset;
                    days++;
                  }

                  onset_is_set = 1;
                }
              }
              if(strlen(scratchpad) > 7)
              {
                if((scratchpad[1] == ':') && (scratchpad[4] == ':') && ((scratchpad[7] == '.') || (scratchpad[7] == ',')))
                {
                  for(digits=0; digits<32; digits++)
                  {
                    if((scratchpad[8 + digits] < '0') || (scratchpad[8 + digits] > '9'))
                    {
                      break;
                    }
                  }
                  scratchpad[8 + digits] = 0;
                  onset = atoi(scratchpad) * 3600LL;
                  onset += (atoi(scratchpad + 2) * 60LL);
                  onset += (long long)(atoi(scratchpad + 5));
                  onset *= TIME_DIMENSION;
                  if(digits)
                  {
                    l_temp = (atoi(scratchpad + 8) * TIME_DIMENSION);
                    for(; digits>0; digits--)
                    {
                      l_temp /= 10LL;
                    }
                    onset += l_temp;
                  }
                  onset -= mainwindow->edfheaderlist[0]->l_starttime;
                  if(onset < last_onset)
                  {
                    last_onset = onset;
                    days++;
                  }

                  onset_is_set = 1;
                }
              }
            }

            if(onsettime_coding == 3)
            {
              if(strlen(scratchpad) > 17)
              {
                if((scratchpad[4] == '-') && (scratchpad[7] == '-') && (scratchpad[13] == ':') && (scratchpad[16] == ':'))
                {
                  scratchpad[19] = 0;
                  date_time.year = atoi(scratchpad);
                  date_time.month = atoi(scratchpad + 5);
                  date_time.day = atoi(scratchpad + 8);
                  date_time.hour = atoi(scratchpad + 11);
                  date_time.minute = atoi(scratchpad + 14);
                  date_time.second = atoi(scratchpad + 17);
                  date_time_to_utc(&utc_time, date_time);
                  onset = utc_time - mainwindow->edfheaderlist[0]->utc_starttime;
                  onset *= TIME_DIMENSION;

                  onset_is_set = 1;
                }
              }
            }

            if(onsettime_coding == 4)
            {
              if(strlen(scratchpad) > 19)
              {
                if((scratchpad[4] == '-') && (scratchpad[7] == '-') && (scratchpad[13] == ':') && (scratchpad[16] == ':') && ((scratchpad[19] == ',') || (scratchpad[19] == '.')))
                {
                  for(digits=0; digits<32; digits++)
                  {
                    if((scratchpad[20 + digits] < '0') || (scratchpad[20 + digits] > '9'))
                    {
                      break;
                    }
                  }
                  scratchpad[20 + digits] = 0;
                  date_time.year = atoi(scratchpad);
                  date_time.month = atoi(scratchpad + 5);
                  date_time.day = atoi(scratchpad + 8);
                  date_time.hour = atoi(scratchpad + 11);
                  date_time.minute = atoi(scratchpad + 14);
                  date_time.second = atoi(scratchpad + 17);
                  date_time_to_utc(&utc_time, date_time);
                  onset = utc_time - mainwindow->edfheaderlist[0]->utc_starttime;
                  onset *= TIME_DIMENSION;
                  if(digits)
                  {
                    l_temp = (atoi(scratchpad + 20) * TIME_DIMENSION);
                    for(; digits>0; digits--)
                    {
                      l_temp /= 10LL;
                    }
                    onset += l_temp;
                  }

                  onset_is_set = 1;
                }
              }
            }
          }
        }

        if((!manualdescription) && (column == descr_column))
        {
          if(onset_is_set)
          {
            strncpy(description, line + str_start, max_descr_length);
            description[max_descr_length] = 0;
            latin1_to_utf8(description, max_descr_length);
            descr_is_set = 1;
          }
        }

        if((use_duration) && (column == duration_column))
        {
          strncpy(duration, line + str_start, 15);
          duration[15] = 0;

          duration_is_set = 1;
        }
      }

      if((!use_duration) || duration_is_set)
      {
        if(onset_is_set && descr_is_set && (!manualdescription))
        {
          if((!ignore_consecutive) || strcmp(description, last_description))
          {
            annotation = (struct annotationblock *)calloc(1, sizeof(struct annotationblock));
            if(annotation == NULL)
            {
              QApplication::restoreOverrideCursor();
              QMessageBox messagewindow(QMessageBox::Critical, "Error", "A memory allocation error occurred (annotation).");
              messagewindow.exec();
              fclose(inputfile);
              return(1);
            }
            annotation->onset = onset + (86400LL * TIME_DIMENSION * days);
            strncpy(annotation->annotation, description, MAX_ANNOTATION_LEN);
            annotation->annotation[MAX_ANNOTATION_LEN] = 0;
            if(use_duration)
            {
              if((!(is_number(duration))) && (duration[0] != '-'))
              {
                remove_trailing_zeros(duration);
                if(duration[0] == '+')
                {
                  strcpy(annotation->duration, duration + 1);
                }
                else
                {
                  strcpy(annotation->duration, duration);
                }
              }
            }
            edfplus_annotation_add_item(&mainwindow->annotationlist[0], annotation);

            strcpy(last_description, description);
          }
        }

        if(onset_is_set && manualdescription)
        {
          annotation = (struct annotationblock *)calloc(1, sizeof(struct annotationblock));
          if(annotation == NULL)
          {
            QApplication::restoreOverrideCursor();
            QMessageBox messagewindow(QMessageBox::Critical, "Error", "A memory allocation error occurred (annotation).");
            messagewindow.exec();
            fclose(inputfile);
            return(1);
          }
          annotation->onset = onset + (86400LL * TIME_DIMENSION * days);
          strncpy(annotation->annotation, description, MAX_ANNOTATION_LEN);
          annotation->annotation[MAX_ANNOTATION_LEN] = 0;
          if(use_duration)
          {
            if((!(is_number(duration))) && (duration[0] != '-'))
            {
              remove_trailing_zeros(duration);
              if(duration[0] == '+')
              {
                strcpy(annotation->duration, duration + 1);
              }
              else
              {
                strcpy(annotation->duration, duration);
              }
            }
          }
          edfplus_annotation_add_item(&mainwindow->annotationlist[0], annotation);
        }
      }

      line_nr++;

      str_start = 0;

      i = 0;

      column = 0;

      column_end = 1;

      onset_is_set = 0;

      descr_is_set = 0;

      duration_is_set = 0;

      qApp->processEvents();

      continue;
    }

    i++;

    if(i>2046)
    {
      QApplication::restoreOverrideCursor();
      snprintf(scratchpad, 256, "Error, line %i is too long.\n", line_nr);
      QMessageBox messagewindow(QMessageBox::Critical, "Error", scratchpad);
      messagewindow.exec();
      fclose(inputfile);
      return(1);
    }
  }

  QApplication::restoreOverrideCursor();

  if(fclose(inputfile))
  {
    QMessageBox messagewindow(QMessageBox::Critical, "Error", "An error occurred while closing inputfile.");
    messagewindow.exec();
    return(1);
  }

  return(0);
}


int UI_ImportAnnotationswindow::import_from_edfplus(void)
{
  int i,
      annotlist_size;

  char path[MAX_PATH_LENGTH],
       str[2048];

  long long starttime_diff;

  FILE *inputfile=NULL;

  struct edfhdrblock *edfhdr=NULL;

  struct annotationblock *annotlist[1];

  struct annotationblock *annotation;


  strcpy(path, QFileDialog::getOpenFileName(0, "Open EDF+/BDF+ file", QString::fromLocal8Bit(mainwindow->recent_opendir), "EDF/BDF files (*.edf *.EDF *.bdf *.BDF )").toLocal8Bit().data());

  if(!strcmp(path, ""))
  {
    return(1);
  }

  get_directory_from_path(mainwindow->recent_opendir, path, MAX_PATH_LENGTH);

  if(mainwindow->annotationlist_backup==NULL)
  {
    mainwindow->annotationlist_backup = edfplus_annotation_copy_list(&mainwindow->annotationlist[0]);
  }

  inputfile = fopeno(path, "rb");
  if(inputfile==NULL)
  {
    QMessageBox messagewindow(QMessageBox::Critical, "Error", "Can not open file for reading.");
    messagewindow.exec();
    return(1);
  }

  rewind(inputfile);

  EDFfileCheck EDFfilechecker;

  str[0] = 0;

  annotlist[0] = NULL;

  edfhdr = EDFfilechecker.check_edf_file(inputfile, str, 0);
  if(edfhdr==NULL)
  {
    strcat(str, "\n File is not a valid EDF or BDF file.");
    QMessageBox messagewindow(QMessageBox::Critical, "Error", str);
    messagewindow.exec();
    fclose(inputfile);
    return(1);
  }

  if(!(edfhdr->edfplus || edfhdr->bdfplus))
  {
    QMessageBox messagewindow(QMessageBox::Critical, "Error", "File is not an EDF+ or BDF+ file.");
    messagewindow.exec();
    free(edfhdr->edfparam);
    free(edfhdr);
    fclose(inputfile);
    return(1);
  }

  strcpy(edfhdr->filename, path);

  edfhdr->file_hdl = inputfile;

  EDF_annotations annotations;

  annotations.get_annotations(0, edfhdr, &annotlist[0], mainwindow->read_nk_trigger_signal);
  if(edfhdr->annots_not_read)
  {
    edfplus_annotation_delete_list(&annotlist[0]);
    free(edfhdr->edfparam);
    free(edfhdr);
    fclose(inputfile);
    return(1);
  }

  annotlist_size = edfplus_annotation_count(&annotlist[0]);
  if(annotlist_size == 0)
  {
    QMessageBox messagewindow(QMessageBox::Information, "Import annotations", "No annotations found.");
    messagewindow.exec();
    free(edfhdr->edfparam);
    free(edfhdr);
    fclose(inputfile);
    return(1);
  }

  starttime_diff = edfhdr->utc_starttime - mainwindow->edfheaderlist[mainwindow->sel_viewtime]->utc_starttime;

  starttime_diff *= TIME_DIMENSION;

  QApplication::setOverrideCursor(Qt::WaitCursor);

  for(i=0; i<annotlist_size; i++)
  {
    annotation = edfplus_annotation_item(&annotlist[0], i);
    annotation->onset += starttime_diff;
    edfplus_annotation_add_copy(&mainwindow->annotationlist[0], annotation);
  }

  edfplus_annotation_sort(&mainwindow->annotationlist[0]);

  edfplus_annotation_delete_list(&annotlist[0]);
  free(edfhdr->edfparam);
  free(edfhdr);
  fclose(inputfile);

  QApplication::restoreOverrideCursor();

  return(0);
}


int UI_ImportAnnotationswindow::import_from_dcevent(void)
{
  int i,
      ignore_consecutive=0,
      signal_nr,
      smpls_per_datrec,
      bytes_per_datrec,
      recsize,
      jumpbytes,
      bufoffset,
      triggervalue,
      bitwidth,
      bitposition,
      trigger_sample,
      next_sample,
      eventcode,
      tmp_value=0,
      edfformat,
      annotations_found=0;

  char scratchpad[256],
       last_description[256],
       *buf;

  long long datrecs,
            trigger_datrec,
            time_per_sample,
            progress_steps;

  union {
          unsigned int one;
          signed int one_signed;
          unsigned short two[2];
          signed short two_signed[2];
          unsigned char four[4];
        } var;

  FILE *inputfile=NULL;

  struct annotationblock *annotation;

  struct signalcompblock *signalcomp;


  last_description[0] = 0;

  if(IgnoreConsecutiveCheckBox->checkState() == Qt::Checked)
  {
    ignore_consecutive = 1;
  }
  else
  {
    ignore_consecutive = 0;
  }

  mainwindow->import_annotations_var->ignoreconsecutive = ignore_consecutive;

  signal_nr = DCEventSignalComboBox->currentIndex();

  if(signal_nr < 0)
  {
    QMessageBox messagewindow(QMessageBox::Critical, "Error", "You need to put at least one signal on the screen.");
    messagewindow.exec();
    return(1);
  }

  if(mainwindow->signalcomp[signal_nr]->num_of_signals > 1)
  {
    QMessageBox messagewindow(QMessageBox::Critical, "Error", "The signal can not be a derivation of multiple signals.");
    messagewindow.exec();
    return(1);
  }

  mainwindow->import_annotations_var->dceventbittime = BitTimeSpinbox->value();

  mainwindow->import_annotations_var->triggerlevel = DCEventTriggerLevelSpinBox->value();

  signalcomp = mainwindow->signalcomp[signal_nr];

  smpls_per_datrec = signalcomp->edfhdr->edfparam[signalcomp->edfsignal[0]].smp_per_record;

  recsize = signalcomp->edfhdr->recordsize;

  bufoffset = signalcomp->edfhdr->edfparam[signalcomp->edfsignal[0]].buf_offset;

  time_per_sample = signalcomp->edfhdr->long_data_record_duration / smpls_per_datrec;

  if(signalcomp->edfhdr->edf)
  {
    edfformat = 1;

    bytes_per_datrec = smpls_per_datrec * 2;
  }
  else
  {
    bytes_per_datrec = smpls_per_datrec * 3;

    edfformat = 0;
  }

  jumpbytes = recsize - bytes_per_datrec;

  inputfile = signalcomp->edfhdr->file_hdl;

  bitwidth = ((long long)mainwindow->import_annotations_var->dceventbittime * 10000LL) / time_per_sample;

  if(bitwidth < 5)
  {
    QMessageBox messagewindow(QMessageBox::Critical, "Error", "Bit Time is set too low compared to the samplerate of the selected signal.");
    messagewindow.exec();
    return(1);
  }

  triggervalue = mainwindow->import_annotations_var->triggerlevel / signalcomp->edfhdr->edfparam[signalcomp->edfsignal[0]].bitvalue;

  triggervalue -= signalcomp->edfhdr->edfparam[signalcomp->edfsignal[0]].offset;

  if(triggervalue >= signalcomp->edfhdr->edfparam[signalcomp->edfsignal[0]].dig_max)
  {
    QMessageBox messagewindow(QMessageBox::Critical, "Error", "Trigger Level is equal or higher than physical maximum.");
    messagewindow.exec();
    return(1);
  }

  if(triggervalue <= signalcomp->edfhdr->edfparam[signalcomp->edfsignal[0]].dig_min)
  {
    QMessageBox messagewindow(QMessageBox::Critical, "Error", "Trigger Level is equal or lower than physical minimum.");
    messagewindow.exec();
    return(1);
  }

  if(fseeko(inputfile, signalcomp->edfhdr->hdrsize + bufoffset, SEEK_SET))
  {
    QMessageBox messagewindow(QMessageBox::Critical, "Error", "An error occurred while reading inputfile. (fseek)");
    messagewindow.exec();
    return(1);
  }

  buf = (char *)malloc(bytes_per_datrec);
  if(buf == NULL)
  {
    QMessageBox messagewindow(QMessageBox::Critical, "Error", "A memory allocation error occurred. (buf)");
    messagewindow.exec();
    return(1);
  }

  annotations_found = 0;

  QProgressDialog progress("Scanning file for DC-events...", "Abort", 0, (int)signalcomp->edfhdr->datarecords);
  progress.setWindowModality(Qt::WindowModal);
  progress.setMinimumDuration(200);

  progress_steps = signalcomp->edfhdr->datarecords / 100LL;
  if(progress_steps < 1LL)
  {
    progress_steps = 1LL;
  }

/*  BITPOSITION:
  0  nothing (idle)
  1  rising edge of startbit found
  2  middle of startbit found
  3  middle of bit 0 found
  ........................
  10 middle of bit 7 found
  11 middle of stopbit found
*/

  bitposition = 0;

  eventcode = 0;

  next_sample = 0;

  trigger_sample = 0;

  trigger_datrec = 0LL;

  for(datrecs=0LL; datrecs < signalcomp->edfhdr->datarecords; datrecs++)
  {
    if(annotations_found > 10000)
    {
      progress.reset();

      break;
    }

    if(!(datrecs % progress_steps))
    {
      progress.setValue((int)datrecs);

      qApp->processEvents();

      if(progress.wasCanceled() == true)
      {
        break;
      }
    }

    if(datrecs)
    {
      fseek(inputfile, jumpbytes, SEEK_CUR);
    }

    if(fread(buf, bytes_per_datrec, 1, inputfile) != 1)
    {
      progress.reset();
      QMessageBox messagewindow(QMessageBox::Critical, "Error", "An error occurred while reading inputfile. (fread)");
      messagewindow.exec();
      free(buf);
      return(1);
    }

    for(i=0; i<smpls_per_datrec; i++)
    {
      if(edfformat)
      {
        tmp_value = *(((signed short *)buf) + i);
      }
      else
      {
        var.two[0] = *((unsigned short *)(buf + (i * 3)));
        var.four[2] = *((unsigned char *)(buf + (i * 3) + 2));

        if(var.four[2]&0x80)
        {
          var.four[3] = 0xff;
        }
        else
        {
          var.four[3] = 0x00;
        }

        tmp_value = var.one_signed;
      }

      if(bitposition)
      {
        if(i == next_sample)
        {
          if(bitposition == 1)
          {
            if(tmp_value < triggervalue)
            {
              bitposition = 0;

              continue;
            }
          }
          else
          {
            if(bitposition < 10)
            {
              if(tmp_value > triggervalue)
              {
                eventcode += (1 << (bitposition - 2));
              }
            }

            if(bitposition == 10)
            {
              if(tmp_value < triggervalue)
              {
                sprintf(scratchpad, "Trigger ID=%i", eventcode);

                if((!ignore_consecutive) || (strcmp(scratchpad, last_description)))
                {
                  annotation = (struct annotationblock *)calloc(1, sizeof(struct annotationblock));
                  if(annotation == NULL)
                  {
                    progress.reset();
                    QMessageBox messagewindow(QMessageBox::Critical, "Error", "A memory allocation error occurred (annotation).");
                    messagewindow.exec();
                    free(buf);
                    return(1);
                  }
                  annotation->onset = ((trigger_datrec * signalcomp->edfhdr->long_data_record_duration) + (trigger_sample * time_per_sample));
                  annotation->onset += signalcomp->edfhdr->starttime_offset;
                  annotation->file_num = signalcomp->edfhdr->file_num;
                  strncpy(annotation->annotation, scratchpad, MAX_ANNOTATION_LEN);
                  annotation->annotation[MAX_ANNOTATION_LEN] = 0;
                  edfplus_annotation_add_item(&mainwindow->annotationlist[0], annotation);

                  annotations_found++;

                  strcpy(last_description, scratchpad);
                }
              }

              bitposition = 0;

              continue;
            }
          }

          next_sample = (i + bitwidth) % smpls_per_datrec;

          bitposition++;
        }
      }
      else
      {
        if(tmp_value > triggervalue)
        {
          trigger_sample = i;

          trigger_datrec = datrecs;

          bitposition = 1;

          next_sample = (i + (bitwidth / 2)) % smpls_per_datrec;

          eventcode = 0;
        }
      }
    }
  }

  free(buf);

  inputfile = NULL;

  progress.reset();

  return(0);
}