else if(number < oldNum)

    {

        // remove channels

        for (unsigned int i = oldNum-1; i > number-1; i--)

        {

            delete channelBuffers.takeLast();

        }

    }

    _numOfChannels = number;

    _infoModel.setNumOfChannels(number);

    emit numOfChannelsChanged(number);

}

void ChannelManager::setNumOfSamples(unsigned number)

{

    _numOfSamples = number;

    for (int ci = 0; ci < channelBuffers.size(); ci++)

    {

        channelBuffers[ci]->resize(_numOfSamples);

    }

    emit numOfSamplesChanged(number);

}

void ChannelManager::pause(bool paused)

{

    _paused = paused;

}

FrameBuffer* ChannelManager::channelBuffer(unsigned channel)

{

    return channelBuffers[channel];

}

ChannelInfoModel* ChannelManager::infoModel()

{

    return &_infoModel;

}

QString ChannelManager::channelName(unsigned channel)

{

    return _infoModel.data(_infoModel.index(channel, ChannelInfoModel::COLUMN_NAME),

                           Qt::DisplayRole).toString();

}

void ChannelManager::onChannelInfoChanged(const QModelIndex & topLeft,

                                          const QModelIndex & bottomRight,

                                          const QVector<int> & roles)

{

    int start = topLeft.row();

    int end = bottomRight.row();

    int col = topLeft.column();

    for (int ci = start; ci <= end; ci++)

    {

        for (auto role : roles)

        {

            switch (role)

            {

                case Qt::EditRole:

                    if (col == ChannelInfoModel::COLUMN_NAME)

                    {

                        emit channelNameChanged(ci, channelName(ci));

                    }

                    break;

                case Qt::ForegroundRole:

                    if (col == ChannelInfoModel::COLUMN_NAME)

                    {

                        // TODO: emit channel color changed

                    }

                    break;

                case Qt::CheckStateRole:

                    if (col == ChannelInfoModel::COLUMN_VISIBILITY)

                    {

                        // TODO: emit visibility

                    }

                    break;

            }

        }

        // emit channelNameChanged(i, channelName(i));

    }

}

void ChannelManager::addData(double* data, unsigned size)

{

    Q_ASSERT(size % _numOfChannels == 0);

    if (_paused) return;

    int n = size / _numOfChannels;

    for (unsigned ci = 0; ci < _numOfChannels; ci++)

    {

        channelBuffers[ci]->addSamples(&data[ci*n], n);

/*

  Copyright © 2017 Hasan Yavuz Özderya

  This file is part of serialplot.

  serialplot is free software: you can redistribute it and/or modify

  it under the terms of the GNU General Public License as published by

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  serialplot is distributed in the hope that it will be useful,

  but WITHOUT ANY WARRANTY; without even the implied warranty of

  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License

  along with serialplot.  If not, see <http://www.gnu.org/licenses/>.

*/

#ifndef CHANNELMANAGER_H

#define CHANNELMANAGER_H

#include <QObject>

#include <QStringList>

#include <QModelIndex>

#include <QVector>

#include <QSettings>

#include "framebuffer.h"

#include "channelinfomodel.h"

class ChannelManager : public QObject

{

    Q_OBJECT

public:

    explicit ChannelManager(unsigned numberOfChannels, unsigned numberOfSamples, QObject *parent = 0);

    ~ChannelManager();

    unsigned numOfChannels();

    unsigned numOfSamples();

    FrameBuffer* channelBuffer(unsigned channel);

    QString channelName(unsigned channel);

    /// Stores channel names into a `QSettings`

    void saveSettings(QSettings* settings);

    /// Loads channel names from a `QSettings`.

    void loadSettings(QSettings* settings);

    /// Returns a model that manages channel information (name, color etc)

    ChannelInfoModel* infoModel();

signals:

    void numOfChannelsChanged(unsigned value);

    void numOfSamplesChanged(unsigned value);

    void channelNameChanged(unsigned channel, QString name);

    void dataAdded(); ///< emitted when data added to channel man.

public slots:

    void setNumOfChannels(unsigned number);

    void setNumOfSamples(unsigned number);

    /**

     * Add data for all channels.

     *

     * All channels data is provided in a single array which contains equal

     * number of samples for all channels. Structure is as shown below:

     *

     * [CH0_SMP0, CH0_SMP1 ... CH0_SMPN, CH1_SMP0, CH1_SMP1, ... , CHN_SMPN]

     *

     * @param data samples for all channels

     * @param size size of `data`, must be multiple of `numOfChannels`

     */

    void addData(double* data, unsigned size);

    /// When paused `addData` does nothing.

    void pause(bool paused);

private:

    unsigned _numOfChannels;

    unsigned _numOfSamples;

    bool _paused;

    QList<FrameBuffer*> channelBuffers;

    // QStringListModel _channelNames;

    ChannelInfoModel _infoModel;

private slots:

    void onChannelInfoChanged(const QModelIndex & topLeft,

                              const QModelIndex & bottomRight,

                              const QVector<int> & roles = QVector<int> ());

};

#endif // CHANNELMANAGER_H

    legend.setVisible(show);

    replot();

}

void Plot::showDemoIndicator(bool show)

{

    demoIndicator.setVisible(show);

    replot();

}

void Plot::showNoChannel(bool show)

{

    noChannelIndicator.setVisible(show);

    replot();

}

void Plot::unzoom()

{

    zoomer.zoom(0);

}

void Plot::darkBackground(bool enabled)

{

    QColor gridColor;

    if (enabled)

    {

        setCanvasBackground(QBrush(Qt::black));

        gridColor.setHsvF(0, 0, 0.25);

        grid.setPen(gridColor);

        zoomer.setRubberBandPen(QPen(Qt::white));

        zoomer.setTrackerPen(QPen(Qt::white));

        sZoomer.setPickerPen(QPen(Qt::white));

        legend.setTextPen(QPen(Qt::white));

    }

    else

    {

        setCanvasBackground(QBrush(Qt::white));

        gridColor.setHsvF(0, 0, 0.80);

        grid.setPen(gridColor);

        zoomer.setRubberBandPen(QPen(Qt::black));

        zoomer.setTrackerPen(QPen(Qt::black));

        sZoomer.setPickerPen(QPen(Qt::black));

        legend.setTextPen(QPen(Qt::black));

    }

    updateSymbols();

    replot();

}

void Plot::flashSnapshotOverlay(bool light)

{

    if (snapshotOverlay != NULL) delete snapshotOverlay;

    QColor color;

    if(light)

    {

        color = QColor(Qt::white);

    }

    else

    {

        color = QColor(Qt::black);

    }

    snapshotOverlay = new PlotSnapshotOverlay(this->canvas(), color);

    connect(snapshotOverlay, &PlotSnapshotOverlay::done,

            [this]()

            {

                delete snapshotOverlay;

                snapshotOverlay = NULL;

            });

}

void Plot::setSymbols(ShowSymbols shown)

{

    showSymbols = shown;

    if (showSymbols == Plot::ShowSymbolsAuto)

    {

        calcSymbolSize();

    }

    else if (showSymbols == Plot::ShowSymbolsShow)

    {

        symbolSize = SYMBOL_SIZE_MAX;

    }

    else

    {

        symbolSize = 0;

    }

    updateSymbols();

    replot();

}

void Plot::onXScaleChanged()

{

    if (showSymbols == Plot::ShowSymbolsAuto)

    {

  serialplot is free software: you can redistribute it and/or modify

  it under the terms of the GNU General Public License as published by

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  serialplot is distributed in the hope that it will be useful,

  but WITHOUT ANY WARRANTY; without even the implied warranty of

  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License

  along with serialplot.  If not, see <http://www.gnu.org/licenses/>.

*/

#ifndef PLOT_H

#define PLOT_H

#include <QColor>

#include <QList>

#include <QAction>

#include <qwt_plot.h>

#include <qwt_plot_grid.h>

#include <qwt_plot_shapeitem.h>

#include <qwt_plot_legenditem.h>

#include <qwt_plot_textlabel.h>

#include "zoomer.h"

#include "scalezoomer.h"

#include "plotsnapshotoverlay.h"

class Plot : public QwtPlot

{

    Q_OBJECT

    friend class PlotManager;

public:

    enum ShowSymbols

    {

        ShowSymbolsAuto,

        ShowSymbolsShow,

        ShowSymbolsHide

    };

    Plot(QWidget* parent = 0);

    ~Plot();

public slots:

    void showGrid(bool show = true);

    void showMinorGrid(bool show = true);

    void showLegend(bool show = true);

    void showDemoIndicator(bool show = true);

    void showNoChannel(bool show = true);

    void unzoom();

    void darkBackground(bool enabled = true);

    void setYAxis(bool autoScaled, double yMin = 0, double yMax = 1);

    void setXAxis(double xMin, double xMax);

    void setSymbols(ShowSymbols shown);

    /**

     * Displays an animation for snapshot.

     *

     * @param light show a light colored (white) animation or the opposite

     */

    void flashSnapshotOverlay(bool light);

    void setNumOfSamples(unsigned value);

    void setPlotWidth(double width);

protected:

    /// update the display of symbols depending on `symbolSize`

    void updateSymbols();

private:

    bool isAutoScaled;

    double yMin, yMax;

    double _xMin, _xMax;

    unsigned numOfSamples;

    double plotWidth;

    int symbolSize;

    Zoomer zoomer;

    ScaleZoomer sZoomer;

    QwtPlotGrid grid;

    PlotSnapshotOverlay* snapshotOverlay;

    QwtPlotLegendItem legend;

    QwtPlotTextLabel demoIndicator;

    QwtPlotTextLabel noChannelIndicator;

    ShowSymbols showSymbols;

    void resetAxes();

    void resizeEvent(QResizeEvent * event);

    void calcSymbolSize();

private slots:

}

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];

    }

    // 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)

{

    for (auto plot : plotWidgets)

    {

        plot->showMinorGrid(show);

    }

}

void PlotManager::showLegend(bool show)

{

    for (auto plot : plotWidgets)

    {

        plot->showLegend(show);

    }

}

void PlotManager::showDemoIndicator(bool show)

{

    isDemoShown = show;

    for (auto plot : plotWidgets)

  This file is part of serialplot.

  serialplot is free software: you can redistribute it and/or modify

  it under the terms of the GNU General Public License as published by

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  serialplot is distributed in the hope that it will be useful,

  but WITHOUT ANY WARRANTY; without even the implied warranty of

  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License

  along with serialplot.  If not, see <http://www.gnu.org/licenses/>.

*/

#ifndef PLOTMANAGER_H

#define PLOTMANAGER_H

#include <QObject>

#include <QWidget>

#include <QScrollArea>

#include <QVBoxLayout>

#include <QList>

#include <QSettings>

#include <QMenu>

#include <qwt_plot_curve.h>

#include "plot.h"

#include "framebufferseries.h"

#include "channelinfomodel.h"

#include "plotmenu.h"

class PlotManager : public QObject

{

    Q_OBJECT

public:

    explicit PlotManager(QWidget* plotArea, PlotMenu* menu,

                         ChannelInfoModel* infoModel = NULL,

                         QObject *parent = 0);

    ~PlotManager();

    /// Add a new curve with title and buffer. A color is

    /// automatically chosen for curve.

    void addCurve(QString title, FrameBuffer* buffer);

    /// Alternative of `addCurve` for static curve data (snapshots).

    void addCurve(QString title, QVector<QPointF> data);

    /// Removes curves from the end

    void removeCurves(unsigned number);

    /// Returns current number of curves known by plot manager

    unsigned numOfCurves();

public slots:

    /// Enable/Disable multiple plot display

    void setMulti(bool enabled);

    /// Update all plot widgets

    void replot();

    /// Enable display of a "DEMO" label on each plot

    void showDemoIndicator(bool show = true);

    /// Set the Y axis

    void setYAxis(bool autoScaled, double yMin = 0, double yMax = 1);

    /// Set the X axis

    void setXAxis(bool asIndex, double xMin = 0 , double xMax = 1);

    /// Display an animation for snapshot

    void flashSnapshotOverlay();

    /// Should be called to update zoom base

    void setNumOfSamples(unsigned value);

    /// Maximum width of X axis (limit of hscroll)

    void setPlotWidth(double width);

private:

    bool isMulti;

    QWidget* _plotArea;

    PlotMenu* _menu;

    QVBoxLayout* layout; ///< layout of the `plotArea`

    QScrollArea* scrollArea;

    QList<QwtPlotCurve*> curves;

    QList<Plot*> plotWidgets;

    Plot* emptyPlot;  ///< for displaying when all channels are hidden

    ChannelInfoModel* _infoModel;

    bool isDemoShown;

    bool _autoScaled;

    double _yMin;

    double _yMax;

    bool _xAxisAsIndex;

    double _xMin;

    double _xMax;

    unsigned _numOfSamples;

    double _plotWidth;

    Plot::ShowSymbols showSymbols;

    /// Setups the layout for multi or single plot

    void setupLayout(bool multiPlot);

    /// Inserts a new plot widget to the current layout.

    Plot* addPlotWidget();

    /// Returns the plot widget that given curve is attached to

    Plot* plotWidget(unsigned curveIndex);

    /// Common part of overloaded `addCurve` functions

    void _addCurve(QwtPlotCurve* curve);

    recordToolBar(tr("Record Toolbar")),

    recordAction(QIcon::fromTheme("media-record"), tr("Record"), this)

{

    overwriteSelected = false;

    _recorder = recorder;

    _channelMan = channelMan;

    ui->setupUi(this);

    recordToolBar.setObjectName("tbRecord");

    recordAction.setCheckable(true);

    recordToolBar.addAction(&recordAction);

    ui->pbRecord->setDefaultAction(&recordAction);

    connect(ui->pbBrowse, &QPushButton::clicked,

            this, &RecordPanel::selectFile);

    connect(&recordAction, &QAction::triggered,

            this, &RecordPanel::onRecord);

    connect(ui->cbRecordPaused, SIGNAL(toggled(bool)),

            this, SIGNAL(recordPausedChanged(bool)));

    connect(ui->cbDisableBuffering, &QCheckBox::toggled,

            [this](bool enabled)

            {

                _recorder->disableBuffering = enabled;

            });

    connect(ui->cbWindowsLE, &QCheckBox::toggled,

            [this](bool enabled)

            {

                _recorder->windowsLE = enabled;

            });

    connect(&recordAction, &QAction::toggled, ui->cbWindowsLE, &QWidget::setDisabled);

}

RecordPanel::~RecordPanel()

{

    delete ui;

}

QToolBar* RecordPanel::toolbar()

{

    return &recordToolBar;

}

bool RecordPanel::recordPaused()

{

    return ui->cbRecordPaused->isChecked();

}

bool RecordPanel::selectFile()

{

    QString fileName = QFileDialog::getSaveFileName(

        parentWidget(), tr("Select recording file"));

    if (fileName.isEmpty())

    {

        return false;

    }

    else

    {

        selectedFile = fileName;

        ui->lbFileName->setText(selectedFile);

        overwriteSelected = QFile::exists(fileName);

        return true;

    }

}

void RecordPanel::onRecord(bool start)

{

    if (!start)

    {

        stopRecording();

        return;

    }

    bool canceled = false;

    if (ui->leSeparator->text().isEmpty())

    {

        QMessageBox::critical(this, "Error",

                              "Column separator cannot be empty! Please select a separator.");

        ui->leSeparator->setFocus(Qt::OtherFocusReason);

        canceled = true;

    }

    // check file name

    if (!canceled && selectedFile.isEmpty() && !selectFile())

    {

        canceled = true;

    }

    if (!canceled && !overwriteSelected && QFile::exists(selectedFile))

    {

/*

  Copyright © 2017 Hasan Yavuz Özderya

  This file is part of serialplot.

  serialplot is free software: you can redistribute it and/or modify

  it under the terms of the GNU General Public License as published by

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  serialplot is distributed in the hope that it will be useful,

  but WITHOUT ANY WARRANTY; without even the implied warranty of

  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License

  along with serialplot.  If not, see <http://www.gnu.org/licenses/>.

*/

#ifndef RECORDPANEL_H

#define RECORDPANEL_H

#include <QWidget>

#include <QString>

#include <QToolBar>

#include <QAction>

#include "datarecorder.h"

#include "channelmanager.h"

namespace Ui {

class RecordPanel;

}

class RecordPanel : public QWidget

{

    Q_OBJECT

public:

    explicit RecordPanel(DataRecorder* recorder, ChannelManager* channelMan,

                         QWidget* parent = 0);

    ~RecordPanel();

    QToolBar* toolbar();

    bool recordPaused();

    /// Stores settings into a `QSettings`

    void saveSettings(QSettings* settings);

    /// Loads settings from a `QSettings`.

    void loadSettings(QSettings* settings);

signals:

    void recordStarted();

    void recordStopped();

    void recordPausedChanged(bool enabled);

public slots:

    /// Must be called when port is closed

    void onPortClose();

private:

    Ui::RecordPanel *ui;

    QToolBar recordToolBar;

    QAction recordAction;

    QString selectedFile;

    bool overwriteSelected;

    DataRecorder* _recorder;

    ChannelManager* _channelMan;

    /**

     * @brief Increments the file name.

     *

     * If file name doesn't have a number at the end of it, a number is appended

     * with underscore starting from 1.

     *

     * @return false if user cancels

     */

    bool incrementFileName(void);

    /**

     * @brief Used to ask user confirmation if auto generated file

     * name exists.

     *

     * If user confirms overwrite, `selectedFile` is set to

     * `fileName`. User is also given option to select file and is

     * shown a file select dialog in this case.

     *

     * @param fileName auto generated file name.

     * @return false if user cancels

     */

    bool confirmOverwrite(QString fileName);