this, &MainWindow::onNumOfSamplesChanged);

    QObject::connect(ui->cbAutoScale, &QCheckBox::toggled,

                     this, &MainWindow::onAutoScaleChecked);

    QObject::connect(ui->spYmin, SIGNAL(valueChanged(double)),

                     this, SLOT(onYScaleChanged()));

    QObject::connect(ui->spYmax, SIGNAL(valueChanged(double)),

                     this, SLOT(onYScaleChanged()));

    QObject::connect(ui->actionClear, SIGNAL(triggered(bool)),

                     this, SLOT(clearPlot()));

    QObject::connect(snapshotMan.takeSnapshotAction(), &QAction::triggered,

                     ui->plot, &Plot::flashSnapshotOverlay);

    // init port signals

    QObject::connect(&(this->serialPort), SIGNAL(error(QSerialPort::SerialPortError)),

                     this, SLOT(onPortError(QSerialPort::SerialPortError)));

    // set limits for axis limit boxes

    ui->spYmin->setRange((-1) * std::numeric_limits<double>::max(),

                         std::numeric_limits<double>::max());

    ui->spYmax->setRange((-1) * std::numeric_limits<double>::max(),

                         std::numeric_limits<double>::max());

    // init data format and reader

    QObject::connect(&dataFormatPanel, &DataFormatPanel::dataAdded,

                     ui->plot, &QwtPlot::replot);

    QObject::connect(ui->actionPause, &QAction::triggered,

                     &dataFormatPanel, &DataFormatPanel::pause);

    // init data arrays and plot

    numOfSamples = ui->spNumOfSamples->value();

    unsigned numOfChannels = dataFormatPanel.numOfChannels();

    QObject::connect(&dataFormatPanel,

                     &DataFormatPanel::numOfChannelsChanged,

                     this,

                     &MainWindow::onNumOfChannelsChanged);

    // init channel data and curve list

    for (unsigned int i = 0; i < numOfChannels; i++)

    {

        channelBuffers.append(new FrameBuffer(numOfSamples));

        curves[i]->setSamples(channelBuffers[i]);

        curves[i]->setPen(Plot::makeColor(i));

        curves[i]->attach(ui->plot);

    }

    // init auto scale

    ui->plot->setAxis(ui->cbAutoScale->isChecked(),

                      ui->spYmin->value(), ui->spYmax->value());

    // init scale range preset list

    for (int nbits = 8; nbits <= 24; nbits++) // signed binary formats

    {

        int rmax = pow(2, nbits-1)-1;

        int rmin = -rmax-1;

        Range r = {double(rmin),  double(rmax)};

        ui->cbRangePresets->addItem(

            QString().sprintf("Signed %d bits %d to +%d", nbits, rmin, rmax),

            QVariant::fromValue(r));

    }

    for (int nbits = 8; nbits <= 24; nbits++) // unsigned binary formats

    {

        int rmax = pow(2, nbits)-1;

        ui->cbRangePresets->addItem(

            QString().sprintf("Unsigned %d bits %d to +%d", nbits, 0, rmax),

            QVariant::fromValue(Range{0, double(rmax)}));

    }

    ui->cbRangePresets->addItem("-1 to +1", QVariant::fromValue(Range{-1, +1}));

    ui->cbRangePresets->addItem("0 to +1", QVariant::fromValue(Range{0, +1}));

    ui->cbRangePresets->addItem("-100 to +100", QVariant::fromValue(Range{-100, +100}));

    ui->cbRangePresets->addItem("0 to +100", QVariant::fromValue(Range{0, +100}));

    QObject::connect(ui->cbRangePresets, SIGNAL(activated(int)),

                     this, SLOT(onRangeSelected()));

    // Init sps (sample per second) counter

    spsLabel.setText("0sps");

    spsLabel.setToolTip("samples per second (total of all channels)");

    ui->statusBar->addPermanentWidget(&spsLabel);

    QObject::connect(&dataFormatPanel,

                     &DataFormatPanel::samplesPerSecondChanged,

                     this, &MainWindow::onSpsChanged);

    // init demo

    QObject::connect(ui->actionDemoMode, &QAction::toggled,

                     this, &MainWindow::enableDemo);

    {   // init demo indicator

        QwtText demoText(" DEMO RUNNING ");  // looks better with spaces

            break;

        case QSerialPort::UnsupportedOperationError:

            qCritical() << "Operation is not supported.";

            break;

        case QSerialPort::TimeoutError:

            qCritical() << "A timeout error occurred.";

            break;

        case QSerialPort::UnknownError:

            qCritical() << "Unknown error! Error: " << serialPort.errorString();

            break;

        default:

            qCritical() << "Unhandled port error: " << error;

            break;

    }

}

void MainWindow::clearPlot()

{

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

    {

        channelBuffers[ci]->clear();

    }

    ui->plot->replot();

}

void MainWindow::onNumOfSamplesChanged(int value)

{

    numOfSamples = value;

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

    {

        channelBuffers[ci]->resize(numOfSamples);

    }

    ui->plot->replot();

}

void MainWindow::onNumOfChannelsChanged(unsigned value)

{

    unsigned int oldNum = channelBuffers.size();

    unsigned numOfChannels = value;

    if (numOfChannels > oldNum)

    {

        // add new channels

        for (unsigned int i = 0; i < numOfChannels - oldNum; i++)

        {

            channelBuffers.append(new FrameBuffer(numOfSamples));

            curves.last()->setSamples(channelBuffers.last());

            curves.last()->setPen(Plot::makeColor(curves.length()-1));

            curves.last()->attach(ui->plot);

        }

    }

    else if(numOfChannels < oldNum)

    {

        // remove channels

        for (unsigned int i = 0; i < oldNum - numOfChannels; i++)

        {

            // also deletes owned FrameBuffer

            delete curves.takeLast();

            channelBuffers.removeLast();

        }

    }

}

void MainWindow::onAutoScaleChecked(bool checked)

{

    if (checked)

    {

        ui->plot->setAxis(true);

        ui->lYmin->setEnabled(false);

        ui->lYmax->setEnabled(false);

        ui->spYmin->setEnabled(false);

        ui->spYmax->setEnabled(false);

    }

    else

    {

        ui->lYmin->setEnabled(true);

        ui->lYmax->setEnabled(true);

        ui->spYmin->setEnabled(true);

        ui->spYmax->setEnabled(true);

        ui->plot->setAxis(false,  ui->spYmin->value(), ui->spYmax->value());

    }

}

void MainWindow::onYScaleChanged()

{

    ui->plot->setAxis(false,  ui->spYmin->value(), ui->spYmax->value());

}

void MainWindow::onRangeSelected()

{

    Range r = ui->cbRangePresets->currentData().value<Range>();

    ui->spYmin->setValue(r.rmin);

    ui->spYmax->setValue(r.rmax);

/*

  Copyright © 2015 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/>.

*/

#include <QRectF>

#include <QKeySequence>

#include <QColor>

#include "plot.h"

#include "utils.h"

Plot::Plot(QWidget* parent) :

    QwtPlot(parent),

    zoomer(this->canvas(), false),

    sZoomer(this, &zoomer),

    _showGridAction("Grid", this),

    _showMinorGridAction("Minor Grid", this),

    _unzoomAction("Unzoom", this),

    _darkBackgroundAction("Dark Background", this)

{

    isAutoScaled = true;

    QObject::connect(&zoomer, &Zoomer::unzoomed, this, &Plot::unzoomed);

    zoomer.setZoomBase();

    grid.attach(this);

    showGrid(false);

    darkBackground(false);

    _showGridAction.setToolTip("Show Grid");

    _showMinorGridAction.setToolTip("Show Minor Grid");

    _unzoomAction.setToolTip("Unzoom the Plot");

    _darkBackgroundAction.setToolTip("Enable Dark Plot Background");

    _showGridAction.setShortcut(QKeySequence("G"));

    _showMinorGridAction.setShortcut(QKeySequence("M"));

    _showGridAction.setCheckable(true);

    _showMinorGridAction.setCheckable(true);

    _darkBackgroundAction.setCheckable(true);

    _showGridAction.setChecked(false);

    _showMinorGridAction.setChecked(false);

    _darkBackgroundAction.setChecked(false);

    _showMinorGridAction.setEnabled(false);

    connect(&_showGridAction, SELECT<bool>::OVERLOAD_OF(&QAction::triggered),

            this, &Plot::showGrid);

    connect(&_showGridAction, SELECT<bool>::OVERLOAD_OF(&QAction::triggered),

            &_showMinorGridAction, &QAction::setEnabled);

    connect(&_showMinorGridAction, SELECT<bool>::OVERLOAD_OF(&QAction::triggered),

            this, &Plot::showMinorGrid);

    connect(&_unzoomAction, &QAction::triggered, this, &Plot::unzoom);

    connect(&_darkBackgroundAction, SELECT<bool>::OVERLOAD_OF(&QAction::triggered),

            this, &Plot::darkBackground);

    snapshotOverlay = NULL;

}

Plot::~Plot()

{

    if (snapshotOverlay != NULL) delete snapshotOverlay;

}

void Plot::setAxis(bool autoScaled, double yAxisMin, double yAxisMax)

{

    this->isAutoScaled = autoScaled;

    if (!autoScaled)

    {

        yMin = yAxisMin;

        yMax = yAxisMax;

/*

  Copyright © 2015 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 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 "zoomer.h"

#include "scalezoomer.h"

#include "plotsnapshotoverlay.h"

class Plot : public QwtPlot

{

    Q_OBJECT

public:

    Plot(QWidget* parent = 0);

    ~Plot();

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

    QList<QAction*> menuActions();

    static QColor makeColor(unsigned int channelIndex);

private:

    bool isAutoScaled;

    double yMin, yMax;

    Zoomer zoomer;

    ScaleZoomer sZoomer;

    QwtPlotGrid grid;

    PlotSnapshotOverlay* snapshotOverlay;

    QAction _showGridAction;

    QAction _showMinorGridAction;

    QAction _unzoomAction;

    QAction _darkBackgroundAction;

    void resetAxes();

public slots:

    void showGrid(bool show = true);

    void showMinorGrid(bool show = true);

    void unzoom();

    void darkBackground(bool enabled = true);

    void flashSnapshotOverlay();

private slots:

    void unzoomed();

};

#endif // PLOT_H