PlotManager::PlotManager(QWidget* plotArea, PlotMenu* menu,

                         const Stream* stream, QObject* parent) :

    QObject(parent)

{

    _stream = stream;

    construct(plotArea, menu);

    if (_stream == nullptr) return;

    // connect to ChannelInfoModel

    infoModel = _stream->infoModel();

    connect(infoModel, &QAbstractItemModel::dataChanged,

                this, &PlotManager::onChannelInfoChanged);

    connect(infoModel, &QAbstractItemModel::modelReset,

            [this]()

            {

                onChannelInfoChanged(infoModel->index(0, 0), // start

                                     infoModel->index(infoModel->rowCount()-1, 0), // end

                                     {}); // roles ignored

            });

    connect(stream, &Stream::numChannelsChanged, this, &PlotManager::onNumChannelsChanged);

    connect(stream, &Stream::dataAdded, this, &PlotManager::replot);

    // add initial curves if any?

    for (unsigned int i = 0; i < stream->numChannels(); i++)

    {

        addCurve(stream->channel(i)->name(), stream->channel(i)->xData(), stream->channel(i)->yData());

    }

}

PlotManager::PlotManager(QWidget* plotArea, PlotMenu* menu,

                         Snapshot* snapshot, QObject *parent) :

    QObject(parent)

{

    _stream = nullptr;

    construct(plotArea, menu);

    setNumOfSamples(snapshot->numSamples());

    setPlotWidth(snapshot->numSamples());

    infoModel = snapshot->infoModel();

    for (unsigned ci = 0; ci < snapshot->numChannels(); ci++)

    {

        addCurve(snapshot->channelName(ci), snapshot->xData[ci], snapshot->yData[ci]);

    }

    connect(infoModel, &QAbstractItemModel::dataChanged,

            this, &PlotManager::onChannelInfoChanged);

}

void PlotManager::construct(QWidget* plotArea, PlotMenu* menu)

{

    _menu = menu;

    _plotArea = plotArea;

    _autoScaled = true;

    _yMin = 0;

    _yMax = 1;

    _xAxisAsIndex = true;

    isDemoShown = false;

    _numOfSamples = 1;

    _plotWidth = 1;

    showSymbols = Plot::ShowSymbolsAuto;

    emptyPlot = NULL;

    // initalize layout and single widget

    isMulti = false;

    scrollArea = NULL;

    // connect to  menu

    connect(menu, &PlotMenu::symbolShowChanged, this, &PlotManager:: setSymbols);

    connect(&menu->showGridAction, SELECT<bool>::OVERLOAD_OF(&QAction::toggled),

            this, &PlotManager::showGrid);

    connect(&menu->showMinorGridAction, SELECT<bool>::OVERLOAD_OF(&QAction::toggled),

            this, &PlotManager::showMinorGrid);

    connect(&menu->darkBackgroundAction, SELECT<bool>::OVERLOAD_OF(&QAction::toggled),

            this, &PlotManager::darkBackground);

    connect(&menu->showLegendAction, SELECT<bool>::OVERLOAD_OF(&QAction::toggled),

            this, &PlotManager::showLegend);

    connect(&menu->showMultiAction, SELECT<bool>::OVERLOAD_OF(&QAction::toggled),

            this, &PlotManager::setMulti);

    connect(&menu->unzoomAction, &QAction::triggered,

            this, &PlotManager::unzoom);

    // initial settings from menu actions

    showGrid(menu->showGridAction.isChecked());

    showMinorGrid(menu->showMinorGridAction.isChecked());

    darkBackground(menu->darkBackgroundAction.isChecked());

    showLegend(menu->showLegendAction.isChecked());

    setMulti(menu->showMultiAction.isChecked());

}

PlotManager::~PlotManager()

{

    while (curves.size())

    {