auto curve = new QwtPlotCurve(title);

    auto series = new FrameBufferSeries(xBuf, yBuf);

    curve->setSamples(series);

    _addCurve(curve);

}

void PlotManager::_addCurve(QwtPlotCurve* curve)

{

    // store and init the curve

    curves.append(curve);

    unsigned index = curves.size()-1;

    auto color = infoModel->color(index);

    curve->setPen(color);

    // create the plot for the curve if we are on multi display

    Plot* plot;

    if (isMulti)

    {

        // create a new plot widget

        plot = addPlotWidget();

    }

    else

    {

        plot = plotWidgets[0];

    }

    if (_stream != nullptr)     // not displaying snapshot

    {

        QVector<const StreamChannel*> dispChannels;

        if (isMulti)

        {

            dispChannels = QVector<const StreamChannel*>(1, _stream->channel(index));

        }

        else

        {

            dispChannels = _stream->allChannels();

        }

        plot->setDispChannels(dispChannels);

    }

    // show the curve

    curve->attach(plot);

    plot->replot();

}

void PlotManager::removeCurves(unsigned number)

{

    for (unsigned i = 0; i < number; i++)

    {

        if (!curves.isEmpty())

        {

            delete curves.takeLast();

            if (isMulti) // delete corresponding widget as well

            {

                delete plotWidgets.takeLast();

            }

        }

    }

}

unsigned PlotManager::numOfCurves()

{

    return curves.size();

}

Plot* PlotManager::plotWidget(unsigned curveIndex)

{

    if (isMulti)

    {

        return plotWidgets[curveIndex];

    }

    else

    {

        return plotWidgets[0];

    }

}

void PlotManager::replot()

{

    for (auto plot : plotWidgets)

    {

        plot->replot();

    }

}

void PlotManager::showGrid(bool show)

{

    for (auto plot : plotWidgets)

    {

        plot->showGrid(show);

    }

}

void PlotManager::showMinorGrid(bool show)

{