channelselectionview.cpp

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//=============================================================================================================
 
//=============================================================================================================
// INCLUDES
//=============================================================================================================
 
#include "channelselectionview.h"
#include "ui_channelselectionview.h"
#include "helpers/selectionsceneitem.h"
#include "helpers/channelinfomodel.h"
#include "helpers/selectionscene.h"
 
#include <mne/mne_layout.h>
#include <utils/selectionio.h>
#include <utils/layoutmaker.h>
 
#include <fiff/fiff.h>
 
//=============================================================================================================
// STL INCLUDES
//=============================================================================================================
 
 
//=============================================================================================================
// QT INCLUDES
//=============================================================================================================
 
#include <QDate>
#include <QVector3D>
#include <QFileDialog>
#include <QFileInfo>
#include <QListWidgetItem>
#include <QSettings>
#include <QApplication>
#include <QKeyEvent>
#include <QSignalBlocker>
#include <QDebug>
 
//=============================================================================================================
// EIGEN INCLUDES
//=============================================================================================================
 
//=============================================================================================================
// USED NAMESPACES
//=============================================================================================================
 
using namespace DISPLIB;
using namespace FIFFLIB;
using namespace UTILSLIB;
 
//=============================================================================================================
// DEFINE MEMBER METHODS
//=============================================================================================================
 
ChannelSelectionView::ChannelSelectionView(const QString& sSettingsPath,
                                           QWidget* parent,
                                           ChannelInfoModel::SPtr pChannelInfoModel,
                                           Qt::WindowType f)
: AbstractView(parent, f)
, m_pUi(std::make_unique<Ui::ChannelSelectionViewWidget>())
, m_pChannelInfoModel(pChannelInfoModel)
, m_bSetup(false)
{
    m_sSettingsPath = sSettingsPath;
    m_pUi->setupUi(this);
 
    //Init gui elements
    initListWidgets();
    initSelectionSceneView();
    initComboBoxes();
    initButtons();
    initCheckBoxes();
 
    loadSettings();
 
    m_bSetup = true;
 
    setCurrentlyMappedFiffChannels(m_pChannelInfoModel->getMappedChannelsList());
}
 
//=============================================================================================================
 
ChannelSelectionView::~ChannelSelectionView()
{
    //    saveSettings();
}
 
//=============================================================================================================
 
void ChannelSelectionView::initListWidgets()
{
    //Install event filter to receive key press events
    m_pUi->m_listWidget_userDefined->installEventFilter(this);
    m_pUi->m_listWidget_selectionGroups->installEventFilter(this);
 
    //Connect list widgets to update themselves and other list widgets when changed
    connect(m_pUi->m_listWidget_selectionGroups, &QListWidget::currentItemChanged,
            this, &ChannelSelectionView::updateSelectionGroupsList);
 
    //Update data view whenever a drag and drop item movement is performed
    //TODO: This is inefficient because updateDataView is called everytime the list's viewport is entered
    connect(m_pUi->m_listWidget_userDefined->model(), &QAbstractTableModel::dataChanged,
            this, &ChannelSelectionView::updateDataView);
}
 
//=============================================================================================================
 
void ChannelSelectionView::initSelectionSceneView()
{
    //Create layout scene and set to view
    m_pSelectionScene = new SelectionScene(m_pUi->m_graphicsView_layoutPlot);
    m_pUi->m_graphicsView_layoutPlot->setScene(m_pSelectionScene);
 
    connect(m_pSelectionScene, &QGraphicsScene::selectionChanged,
            this, &ChannelSelectionView::updateUserDefinedChannelsList);
}
 
//=============================================================================================================
 
void ChannelSelectionView::initComboBoxes()
{
    m_pUi->m_comboBox_layoutFile->clear();
    m_pUi->m_comboBox_layoutFile->insertItems(0, QStringList() << "babymeg-mag-inner-layer.lout"
                                                               << "babymeg-mag-outer-layer.lout"
                                                               //        << "babymeg-mag-ref.lout"
                                                               << "Vectorview-grad.lout"
                                                               << "Vectorview-all.lout"
                                                               << "Vectorview-mag.lout"
                                                               << "standard_waveguard64_duke.lout"
                                              //     << "CTF-275.lout"
                                              //     << "magnesWH3600.lout"
    );
 
    connect(m_pUi->m_comboBox_layoutFile, &QComboBox::currentTextChanged,
            this, &ChannelSelectionView::onComboBoxLayoutChanged);
 
    //Initialise layout as neuromag vectorview with all channels
    QString selectionName("Vectorview-all.lout");
    //loadLayout(QCoreApplication::applicationDirPath() + selectionName.prepend("/../resources/general/2DLayouts/"));
    setCurrentLayoutFile(selectionName);
 
    //Load selection groups again because they need to be reinitialised every time a new layout hase been loaded
    selectionName = QString("mne_browse_raw_vv.sel");
    loadSelectionGroups(QCoreApplication::applicationDirPath() + selectionName.prepend("/../resources/general/selectionGroups/"));
}
 
//=============================================================================================================
 
void ChannelSelectionView::initButtons()
{
    connect(m_pUi->m_pushButton_saveSelection, &QPushButton::clicked,
            this, &ChannelSelectionView::onBtnSaveUserSelection);
 
    connect(m_pUi->m_pushButton_loadSelection, &QPushButton::clicked,
            this, &ChannelSelectionView::onBtnLoadUserSelection);
 
    connect(m_pUi->m_pushButton_addToSelectionGroups, &QPushButton::clicked,
            this, &ChannelSelectionView::onBtnAddToSelectionGroups);
}
 
//=============================================================================================================
 
void ChannelSelectionView::initCheckBoxes()
{
    connect(m_pUi->m_checkBox_showBadChannelsAsRed, &QCheckBox::clicked,
            this, &ChannelSelectionView::updateBadChannels);
}
 
//=============================================================================================================
 
void ChannelSelectionView::setCurrentlyMappedFiffChannels(const QStringList& mappedLayoutChNames)
{
    m_currentlyLoadedFiffChannels = mappedLayoutChNames;
 
    //Clear the visible channel list
    m_pUi->m_listWidget_visibleChannels->clear();
 
    //Keep the entry All in the selection list and m_selectionGroupsMap -> delete the rest
    m_pUi->m_listWidget_selectionGroups->clear();
 
    //Create group 'All' manually (because this group depends on the loaded channels from the fiff data file, not on the loaded selection file)
    auto it = m_selectionGroupsMap.find("All");
    if (it != m_selectionGroupsMap.end()) {
        m_selectionGroupsMap.erase(it);
    }
    m_selectionGroupsMap.insert("All", m_currentlyLoadedFiffChannels);
 
    //Add selection groups to list widget
    for (auto i = m_selectionGroupsMap.constBegin(); i != m_selectionGroupsMap.constEnd(); i++) {
        m_pUi->m_listWidget_selectionGroups->insertItem(m_pUi->m_listWidget_selectionGroups->count(), i.key());
    }
 
    //Set group all as slected item
    m_pUi->m_listWidget_selectionGroups->setCurrentItem(getItemForChName(m_pUi->m_listWidget_selectionGroups, "All"), QItemSelectionModel::Select);
 
    //Update selection
    updateSelectionGroupsList(getItemForChName(m_pUi->m_listWidget_selectionGroups, "All"), new QListWidgetItem());
}
 
//=============================================================================================================
 
void ChannelSelectionView::highlightChannels(QModelIndexList channelIndexList)
{
    QStringList channelList;
    for (int i = 0; i < channelIndexList.size(); i++) {
        QModelIndex nameIndex = m_pChannelInfoModel->index(channelIndexList.at(i).row(), 3);
        channelList << m_pChannelInfoModel->data(nameIndex, ChannelInfoModelRoles::GetMappedLayoutChName).toString();
    }
 
    QList<QGraphicsItem*> allSceneItems = m_pSelectionScene->items();
 
    for (int i = 0; i < allSceneItems.size(); i++) {
        SelectionSceneItem* item = static_cast<SelectionSceneItem*>(allSceneItems.at(i));
        if (channelList.contains(item->m_sChannelName))
            item->m_bHighlightItem = true;
        else
            item->m_bHighlightItem = false;
    }
 
    m_pSelectionScene->update();
}
 
//=============================================================================================================
 
void ChannelSelectionView::selectChannels(QStringList channelList)
{
    QList<QGraphicsItem*> allSceneItems = m_pSelectionScene->items();
 
    for (int i = 0; i < allSceneItems.size(); i++) {
        SelectionSceneItem* item = static_cast<SelectionSceneItem*>(allSceneItems.at(i));
        if (channelList.contains(item->m_sChannelName))
            item->setSelected(true);
        else
            item->setSelected(false);
    }
 
    m_pSelectionScene->update();
}
 
//=============================================================================================================
 
QStringList ChannelSelectionView::getSelectedChannels()
{
    //if no channels have been selected by the user -> show selected group channels
    QListWidget* targetListWidget;
    if (m_pUi->m_listWidget_userDefined->count() > 0)
        targetListWidget = m_pUi->m_listWidget_userDefined;
    else
        targetListWidget = m_pUi->m_listWidget_visibleChannels;
 
    //Create list of channels which are to be visible in the view
    QStringList selectedChannels;
 
    for (int i = 0; i < targetListWidget->count(); i++) {
        QListWidgetItem* item = targetListWidget->item(i);
        selectedChannels << item->text();
    }
 
    return selectedChannels;
}
 
//=============================================================================================================
 
QListWidgetItem* ChannelSelectionView::getItemForChName(QListWidget* listWidget,
                                                        const QString& channelName)
{
    for (int i = 0; i < listWidget->count(); i++)
        if (listWidget->item(i)->text() == channelName)
            return listWidget->item(i);
 
    return new QListWidgetItem();
}
 
//=============================================================================================================
 
const QMap<QString, QPointF>& ChannelSelectionView::getLayoutMap()
{
    return m_layoutMap;
}
 
//=============================================================================================================
 
void ChannelSelectionView::newFiffFileLoaded(QSharedPointer<FiffInfo>& pFiffInfo)
{
    Q_UNUSED(pFiffInfo);
 
    loadLayout(resolveLayoutPath(m_pUi->m_comboBox_layoutFile->currentText()));
}
 
//=============================================================================================================
 
QString ChannelSelectionView::getCurrentLayoutFile()
{
    return m_pUi->m_comboBox_layoutFile->currentText();
}
 
//=============================================================================================================
 
QString ChannelSelectionView::getCurrentGroupFile()
{
    return m_pUi->m_lineEdit_loadedFile->text();
}
 
//=============================================================================================================
 
void ChannelSelectionView::setCurrentLayoutFile(QString currentLayoutFile)
{
    qDebug() << "setCurrentLayoutFile:" << currentLayoutFile;
    const QSignalBlocker blocker(m_pUi->m_comboBox_layoutFile);
    m_pUi->m_comboBox_layoutFile->setCurrentText(currentLayoutFile);
 
    loadLayout(resolveLayoutPath(currentLayoutFile));
    updateBadChannels();
}
 
//=============================================================================================================
 
void ChannelSelectionView::updateBadChannels()
{
    QStringList badChannelMappedNames;
    QStringList badChannelList = m_pChannelInfoModel->getBadChannelList();
 
    if (m_pUi->m_checkBox_showBadChannelsAsRed->isChecked()) {
        for (int i = 0; i < m_pChannelInfoModel->rowCount(); i++) {
            QModelIndex digIndex = m_pChannelInfoModel->index(i, 3);
            QString mappedChName = m_pChannelInfoModel->data(digIndex, ChannelInfoModelRoles::GetMappedLayoutChName).toString();
 
            digIndex = m_pChannelInfoModel->index(i, 1);
            QString origChName = m_pChannelInfoModel->data(digIndex, ChannelInfoModelRoles::GetOrigChName).toString();
 
            if (badChannelList.contains(origChName)) {
                badChannelMappedNames << mappedChName;
            }
        }
    }
 
    m_pSelectionScene->repaintItems(m_layoutMap, badChannelMappedNames);
    m_pSelectionScene->update();
 
    updateSceneItems();
    updateDataView();
}
 
//=============================================================================================================
 
void ChannelSelectionView::updateDataView()
{
    //if no channels have been selected by the user -> show selected group channels
    QListWidget* targetListWidget;
    if (m_pUi->m_listWidget_userDefined->count() > 0)
        targetListWidget = m_pUi->m_listWidget_userDefined;
    else
        targetListWidget = m_pUi->m_listWidget_visibleChannels;
 
    //Create list of channels which are to be visible in the view
    QStringList selectedChannels;
 
    for (int i = 0; i < targetListWidget->count(); i++) {
        QListWidgetItem* item = targetListWidget->item(i);
        int indexTemp = m_pChannelInfoModel->getIndexFromMappedChName(item->text());
 
        if (indexTemp != -1) {
            QModelIndex mappedNameIndex = m_pChannelInfoModel->index(indexTemp, 1);
            QString origChName = m_pChannelInfoModel->data(mappedNameIndex, ChannelInfoModelRoles::GetOrigChName).toString();
 
            selectedChannels << origChName;
        } else
            selectedChannels << item->text();
    }
 
    emit showSelectedChannelsOnly(selectedChannels);
 
    //emit signal that selection was changed
    if (!m_pSelectionScene->selectedItems().empty()) {
        emit selectionChanged(m_pSelectionScene->selectedItems());
    } else {
        //only return visible items (EEG or MEG channels)
        QList<QGraphicsItem*> visibleItemList = m_pSelectionScene->items();
        QMutableListIterator<QGraphicsItem*> i(visibleItemList);
        while (i.hasNext()) {
            if (!i.next()->isVisible()) {
                i.remove();
            }
        }
        emit selectionChanged(visibleItemList);
    }
}
 
//=============================================================================================================
 
void ChannelSelectionView::saveSettings()
{
    if (m_sSettingsPath.isEmpty()) {
        return;
    }
 
    QSettings settings("MNECPP");
 
    qInfo().noquote().nospace() << "saveSettings: " << getCurrentLayoutFile();
 
    settings.setValue(m_sSettingsPath + QString("/ChannelSelectionView/selectedLayoutFile"), getCurrentLayoutFile());
    settings.setValue(m_sSettingsPath + QString("/ChannelSelectionView/channelSelectionViewPos"), this->pos());
    settings.setValue(m_sSettingsPath + QString("/ChannelSelectionView/selectedGroupFile"), getCurrentGroupFile());
}
 
//=============================================================================================================
 
void ChannelSelectionView::loadSettings()
{
    if (m_sSettingsPath.isEmpty()) {
        return;
    }
 
    QSettings settings("MNECPP");
 
    setCurrentLayoutFile(settings.value(m_sSettingsPath + QString("/ChannelSelectionView/selectedLayoutFile"), "Vectorview-all.lout").toString());
    loadSelectionGroups(QCoreApplication::applicationDirPath() + settings.value(m_sSettingsPath + QString("/ChannelSelectionView/selectedGroupFile"), "mne_browse_raw_vv.sel").toString().prepend("/../resources/general/selectionGroups/"));
 
    qDebug() << "loadSettings: " << getCurrentLayoutFile();
 
    QPoint pos = settings.value(m_sSettingsPath + QString("/ChannelSelectionView/channelSelectionViewPos"), QPoint(100, 100)).toPoint();
 
    QList<QScreen*> screensList = QGuiApplication::screens();
    if (screensList.isEmpty()) {
        move(QPoint(100, 100));
    } else {
        move(pos);
    }
}
 
//=============================================================================================================
 
void ChannelSelectionView::updateGuiMode(GuiMode mode)
{
    switch (mode) {
        case GuiMode::Clinical:
            break;
        default: // default is research mode
            break;
    }
}
 
//=============================================================================================================
 
void ChannelSelectionView::updateProcessingMode(ProcessingMode mode)
{
    switch (mode) {
        case ProcessingMode::Offline:
            break;
        default: // default is realtime mode
            break;
    }
}
 
//=============================================================================================================
 
bool ChannelSelectionView::loadLayout(QString path)
{
    qDebug() << "loadLayout:" << path;
    const std::optional<MNELIB::MNELayout> layout = MNELIB::MNELayout::read(path);
    const bool state = layout.has_value();
    m_layoutMap = state ? layout->channelPositions() : QMap<QString, QPointF>();
 
    //if no layout for EEG is specified generate from digitizer points
    QList<QVector<float>> inputPoints;
    QList<QVector<float>> outputPoints;
    QStringList names;
    QFile out("manualLayout.lout");
 
    for (int i = 0; i < m_pChannelInfoModel->rowCount(); i++) {
        QModelIndex digIndex = m_pChannelInfoModel->index(i, 1);
        QString chName = m_pChannelInfoModel->data(digIndex, ChannelInfoModelRoles::GetOrigChName).toString();
 
        digIndex = m_pChannelInfoModel->index(i, 8);
        QVector3D channelDig = m_pChannelInfoModel->data(digIndex, ChannelInfoModelRoles::GetChDigitizer).value<QVector3D>();
 
        digIndex = m_pChannelInfoModel->index(i, 4);
        int kind = m_pChannelInfoModel->data(digIndex, ChannelInfoModelRoles::GetChKind).toInt();
 
        if (kind == FIFFV_EEG_CH) { //FIFFV_MEG_CH
            QVector<float> temp;
            temp.append(channelDig.x());
            temp.append(channelDig.y());
            temp.append(channelDig.z());
            inputPoints.append(temp);
 
            names << chName;
        }
    }
 
    float prad = 60.0;
    float width = 5.0;
    float height = 4.0;
    int numberTries = 0;
 
    if (inputPoints.size() > 0) {
        while (numberTries < 10) {
            if (!LayoutMaker::makeLayout(inputPoints,
                                         outputPoints,
                                         names,
                                         out,
                                         true,
                                         prad,
                                         width,
                                         height,
                                         false,
                                         false,
                                         true)) {
                numberTries++;
            } else {
                numberTries = 11;
            }
        }
    }
 
    //Add new EEG points to Layout Map
    for (int i = 0; i < outputPoints.size(); i++) {
        if (!m_layoutMap.contains(names.at(i))) {
            m_layoutMap[names.at(i)] = QPointF(outputPoints.at(i)[0], outputPoints.at(i)[1]);
        }
    }
 
    QStringList bad;
    m_pSelectionScene->repaintItems(m_layoutMap, bad);
    m_pSelectionScene->update();
    updateSceneItems();
 
    //Fit to view
    m_pUi->m_graphicsView_layoutPlot->fitInView(m_pSelectionScene->itemsBoundingRect(), Qt::KeepAspectRatio);
 
    if (state)
        emit loadedLayoutMap(m_layoutMap);
 
    if (m_bSetup) {
        saveSettings();
    }
 
    return state;
}
 
//=============================================================================================================
 
QString ChannelSelectionView::resolveLayoutPath(const QString& layoutFile) const
{
    if (layoutFile.isEmpty()) {
        return QString();
    }
 
    if (QFileInfo(layoutFile).isAbsolute()) {
        return layoutFile;
    }
 
    return QCoreApplication::applicationDirPath() + QStringLiteral("/../resources/general/2DLayouts/") + layoutFile;
}
 
//=============================================================================================================
 
bool ChannelSelectionView::loadSelectionGroups(QString path)
{
    //Clear the visible channel list
    m_pUi->m_listWidget_visibleChannels->clear();
 
    //Keep the entry All in the selection list and m_selectionGroupsMap -> delete the rest
    m_pUi->m_listWidget_selectionGroups->clear();
 
    //Read selection from file and store to map
    QString newPath = path; //QCoreApplication::applicationDirPath() + path.prepend("/../resources/general/selectionGroups/");
 
    m_selectionGroupsMap.clear();
 
    // An empty path, or one with neither recognised extension, reads nothing
    // and must report failure rather than an indeterminate value.
    bool state = false;
    if (!path.isEmpty()) {
        if (path.contains(".sel"))
            state = SelectionIO::readMNESelFile(newPath, m_selectionGroupsMap);
        if (path.contains(".mon"))
            state = SelectionIO::readBrainstormMonFile(newPath, m_selectionGroupsMap);
    }
 
    //Create group 'All' and 'All EEG' manually (bcause this group depends on the loaded channels from the Info data file, not on the loaded selection file)
    auto it = m_selectionGroupsMap.find("All");
    if (it != m_selectionGroupsMap.end()) {
        m_selectionGroupsMap.erase(it);
    }
    m_selectionGroupsMap.insert("All", m_currentlyLoadedFiffChannels);
 
    QStringList names;
    for (int i = 0; i < m_pChannelInfoModel->rowCount(); i++) {
        QModelIndex digIndex = m_pChannelInfoModel->index(i, 1);
        QString chName = m_pChannelInfoModel->data(digIndex, ChannelInfoModelRoles::GetOrigChName).toString();
 
        digIndex = m_pChannelInfoModel->index(i, 4);
        int kind = m_pChannelInfoModel->data(digIndex, ChannelInfoModelRoles::GetChKind).toInt();
 
        if (kind == FIFFV_EEG_CH) //FIFFV_MEG_CH
            names << chName;
    }
 
    //Add 'Add EEG' group to selection groups
    it = m_selectionGroupsMap.find("All EEG");
    if (it != m_selectionGroupsMap.end()) {
        m_selectionGroupsMap.erase(it);
    }
    m_selectionGroupsMap.insert("All EEG", names);
 
    //Add selection groups to list widget
 
    for (auto i = m_selectionGroupsMap.constBegin(); i != m_selectionGroupsMap.constEnd(); i++) {
        m_pUi->m_listWidget_selectionGroups->insertItem(m_pUi->m_listWidget_selectionGroups->count(), i.key());
    }
 
    //Update selection
    updateSelectionGroupsList(getItemForChName(m_pUi->m_listWidget_selectionGroups, "All"), new QListWidgetItem());
 
    //Set group all as slected item
    m_pUi->m_listWidget_selectionGroups->setCurrentItem(getItemForChName(m_pUi->m_listWidget_selectionGroups, "All"), QItemSelectionModel::Select);
 
    m_pUi->m_lineEdit_loadedFile->setText(QFileInfo(path).fileName());
 
    if (m_bSetup) {
        saveSettings();
    }
 
    return state;
}
 
//=============================================================================================================
 
void ChannelSelectionView::cleanUpMEGChannels()
{
    //Iterate through all loaded selection groups
    for (auto i = m_selectionGroupsMap.constBegin(); i != m_selectionGroupsMap.constEnd(); i++) {
        QStringList channelList = i.value();
 
        //Search the current selection group for MEG channels which are not in the currently loaded layout file and delete them
        QMutableStringListIterator stringListIndex(channelList);
        while (stringListIndex.hasNext()) {
            stringListIndex.next();
 
            if (!m_layoutMap.contains(stringListIndex.value()) && stringListIndex.value().contains("MEG"))
                stringListIndex.remove();
        }
 
        //Overwrite old selection groups channels
        m_selectionGroupsMap.insert(i.key(), channelList);
    }
}
 
//=============================================================================================================
 
void ChannelSelectionView::updateSelectionGroupsList(QListWidgetItem* current, QListWidgetItem* previous)
{
    Q_UNUSED(previous);
 
    if (current == 0) {
        return;
    }
    if (current->text().contains("EEG"))
        m_pSelectionScene->m_iChannelTypeMode = FIFFV_EEG_CH;
    else
        m_pSelectionScene->m_iChannelTypeMode = FIFFV_MEG_CH;
 
    //update visible channel list widget
    m_pUi->m_listWidget_visibleChannels->clear();
    auto items = m_selectionGroupsMap.find(current->text());
    m_pUi->m_listWidget_visibleChannels->addItems(*items);
 
    //update scene items based o nthe new selection group
    updateSceneItems();
 
    //update the channels plotted in the data view
    updateDataView();
 
    updateBadChannels();
}
 
//=============================================================================================================
 
void ChannelSelectionView::updateSceneItems()
{
    QStringList visibleItems;
 
    for (int i = 0; i < m_pUi->m_listWidget_visibleChannels->count(); i++)
        visibleItems << m_pUi->m_listWidget_visibleChannels->item(i)->text();
 
    m_pSelectionScene->hideItems(visibleItems);
}
 
//=============================================================================================================
 
void ChannelSelectionView::updateUserDefinedChannelsList()
{
    QList<QGraphicsItem*> itemList = m_pSelectionScene->selectedItems();
    QStringList userDefinedChannels;
 
    for (int i = 0; i < itemList.size(); i++) {
        SelectionSceneItem* item = static_cast<SelectionSceneItem*>(itemList.at(i));
        userDefinedChannels << item->m_sChannelName;
    }
 
    m_pUi->m_listWidget_userDefined->clear();
    m_pUi->m_listWidget_userDefined->addItems(userDefinedChannels);
 
    updateDataView();
}
 
//=============================================================================================================
 
void ChannelSelectionView::onBtnLoadUserSelection()
{
    QString path = QFileDialog::getOpenFileName(this,
                                                QString("Open selection file"),
                                                QString("../resources/general/selectionGroups/"),
                                                tr("Selection files (*.sel *.mon)"));
 
    if (path.isEmpty())
        return;
 
    loadSelectionGroups(path);
    m_pUi->m_lineEdit_loadedFile->setText(QFileInfo(path).fileName());
}
 
//=============================================================================================================
 
void ChannelSelectionView::onBtnSaveUserSelection()
{
    QDate date;
    QString path = QFileDialog::getSaveFileName(this,
                                                "Save user channel selection",
                                                QString("../resources/general/selectionGroups/%1_%2_%3_UserSelection").arg(date.currentDate().year()).arg(date.currentDate().month()).arg(date.currentDate().day()),
                                                tr("MNE selection file(*.sel);; Brainstorm montage file(*.mon)"));
 
    QMultiMap<QString, QStringList> tempMap = m_selectionGroupsMap;
    tempMap.remove("All");
    tempMap.remove("All EEG");
 
    if (!path.isEmpty()) {
        if (path.contains(".sel"))
            SelectionIO::writeMNESelFile(path, tempMap);
        if (path.contains(".mon"))
            SelectionIO::writeBrainstormMonFiles(path, tempMap);
    }
}
 
//=============================================================================================================
 
void ChannelSelectionView::onBtnAddToSelectionGroups()
{
    QStringList temp;
    for (int i = 0; i < m_pUi->m_listWidget_userDefined->count(); i++)
        temp << m_pUi->m_listWidget_userDefined->item(i)->text();
 
    m_selectionGroupsMap.insert(m_pUi->m_lineEdit_selectionGroupName->text(), temp);
    m_pUi->m_listWidget_selectionGroups->insertItem(m_pUi->m_listWidget_selectionGroups->count(), m_pUi->m_lineEdit_selectionGroupName->text());
}
 
//=============================================================================================================
 
void ChannelSelectionView::onComboBoxLayoutChanged()
{
    QString selectionName(m_pUi->m_comboBox_layoutFile->currentText());
    loadLayout(resolveLayoutPath(selectionName));
    updateBadChannels();
}
 
//=============================================================================================================
 
void ChannelSelectionView::resizeEvent(QResizeEvent* event)
{
    Q_UNUSED(event);
 
    //Fit scene in view
    //m_pUi->m_graphicsView_layoutPlot->fitInView(m_pSelectionScene->itemsBoundingRect(), Qt::KeepAspectRatio);
}
 
//=============================================================================================================
 
bool ChannelSelectionView::eventFilter(QObject* obj, QEvent* event)
{
    //Setup delete key on user defined channel list
    if (obj == m_pUi->m_listWidget_userDefined && event->type() == QEvent::KeyRelease) {
        QKeyEvent* keyEvent = static_cast<QKeyEvent*>(event);
 
        if (keyEvent->key() == Qt::Key_Delete) {
            qDeleteAll(m_pUi->m_listWidget_userDefined->selectedItems());
            updateDataView();
            return true;
        } else
            return false;
    }
 
    if (obj == m_pUi->m_listWidget_selectionGroups && event->type() == QEvent::KeyRelease) {
        QKeyEvent* keyEvent = static_cast<QKeyEvent*>(event);
 
        if (keyEvent->key() == Qt::Key_Delete) {
            QList<QListWidgetItem*> tempSelectedList;
 
            for (int i = 0; i < m_pUi->m_listWidget_selectionGroups->selectedItems().size(); i++) {
                if (m_pUi->m_listWidget_selectionGroups->selectedItems().at(i)->text() != "All" &&
                    m_pUi->m_listWidget_selectionGroups->selectedItems().at(i)->text() != "All EEG") {
                    tempSelectedList.append(m_pUi->m_listWidget_selectionGroups->selectedItems().at(i));
                    m_selectionGroupsMap.remove(m_pUi->m_listWidget_selectionGroups->selectedItems().at(i)->text());
                }
            }
 
            qDeleteAll(tempSelectedList);
            updateDataView();
 
            return true;
        } else
            return false;
    }
 
    // pass the event on to the parent class
    return QWidget::eventFilter(obj, event);
}
 
//=============================================================================================================
 
QWidget* ChannelSelectionView::getViewWidget()
{
    return m_pUi->viewWidget;
}
 
//=============================================================================================================
 
QWidget* ChannelSelectionView::getControlWidget()
{
    return m_pUi->controlWidget;
}
 
//=============================================================================================================
 
bool ChannelSelectionView::isSelectionEmpty()
{
    return ((m_pUi->m_listWidget_selectionGroups->currentItem()->text() == "All") && (m_pUi->m_listWidget_userDefined->count() == 0));
}
 
//=============================================================================================================
 
void ChannelSelectionView::clearView()
{
    m_pSelectionScene->clear();
}