#

# 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/>.

#

cmake_minimum_required(VERSION 2.8.11)

project(serialplot)

set(PROGRAM_NAME ${CMAKE_PROJECT_NAME} CACHE STRING "Output program name")

set(PROGRAM_DISPLAY_NAME "SerialPlot" CACHE STRING "Display name (menus etc) of the program")

# Find includes in corresponding build directories

set(CMAKE_INCLUDE_CURRENT_DIR ON)

# Instruct CMake to run moc automatically when needed.

set(CMAKE_AUTOMOC ON)

# add local path for cmake modules

set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/modules/")

# Find the QtWidgets library

find_package(Qt5Widgets)

# Find QWT or use static

set(QWT_USE_STATIC false CACHE BOOL "Use a static version of Qwt provided by user.")

set(QWT_STATIC_LIBRARY "" CACHE FILEPATH "Path to the static Qwt library, libqwt.a.")

set(QWT_STATIC_INCLUDE "" CACHE PATH "Path to the Qwt include directory when building Qwt static.")

if (QWT_USE_STATIC)

  set(QWT_LIBRARY ${QWT_STATIC_LIBRARY})

  set(QWT_INCLUDE_DIR ${QWT_STATIC_INCLUDE})

else (QWT_USE_STATIC)

  find_package(Qwt 6.1 REQUIRED)

endif (QWT_USE_STATIC)

# includes

include_directories(${QWT_INCLUDE_DIR})

# wrap UI and resource files

qt5_wrap_ui(UI_FILES

  mainwindow.ui

  portcontrol.ui

  about_dialog.ui

  snapshotview.ui

  )

qt5_add_resources(RES_FILES misc/icons.qrc)

add_executable(${PROGRAM_NAME} WIN32

  main.cpp

  mainwindow.cpp

  portcontrol.cpp

  plot.cpp

  zoomer.cpp

  hidabletabwidget.cpp

  framebuffer.cpp

  scalepicker.cpp

  scalezoomer.cpp

  portlist.cpp

  snapshot.cpp

  snapshotview.cpp

  ${UI_FILES}

  ${RES_FILES}

  misc/windows_icon.rc

  )

# Use the Widgets module from Qt 5.

target_link_libraries(${PROGRAM_NAME} ${QWT_LIBRARY})

qt5_use_modules(${PROGRAM_NAME} Widgets SerialPort Svg)

# set compiler flags

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")

# Enable C++11 support, fail if not supported

include(CheckCXXCompilerFlag)

CHECK_CXX_COMPILER_FLAG("-std=c++11" COMPILER_SUPPORTS_CXX11)

CHECK_CXX_COMPILER_FLAG("-std=c++0x" COMPILER_SUPPORTS_CXX0X)

if(COMPILER_SUPPORTS_CXX11)

  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

elseif(COMPILER_SUPPORTS_CXX0X)

  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x")

else()

  message(STATUS "The compiler ${CMAKE_CXX_COMPILER} has no C++11 support. Please use a different C++ compiler.")

endif()

# version number

set(MAJOR_VERSION 0 CACHE INT "Program major version number.")

set(MINOR_VERSION 5 CACHE INT "Program minor version number.")

set(PATCH_VERSION 0 CACHE INT "Program patch version number.")

set(VERSION_STRING "${MAJOR_VERSION}.${MINOR_VERSION}.${PATCH_VERSION}")

# get revision number from mercurial

find_program(MERCURIAL hg)

if (MERCURIAL)

  execute_process(COMMAND ${MERCURIAL} id -i

    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}

    RESULT_VARIABLE MERCURIAL_RESULT

    OUTPUT_VARIABLE VERSION_REVISION

    OUTPUT_STRIP_TRAILING_WHITESPACE)

  if(NOT MERCURIAL_RESULT EQUAL 0)

    set(VERSION_SCM_REVISION false)

  endif(NOT MERCURIAL_RESULT EQUAL 0)

endif (MERCURIAL)

if (NOT VERSION_REVISION)

  set(VERSION_REVISION "0")

endif (NOT VERSION_REVISION)

message("SCM revision: ${VERSION_REVISION}")

# configure version file

configure_file("${CMAKE_CURRENT_SOURCE_DIR}/version.h.in" "${CMAKE_CURRENT_BINARY_DIR}/version.h")

# add make run target

add_custom_target(run

    COMMAND ${PROGRAM_NAME}

    DEPENDS ${PROGRAM_NAME}

    WORKING_DIRECTORY ${CMAKE_PROJECT_DIR}

)

# installing

install(TARGETS ${PROGRAM_NAME} DESTINATION bin)

# for windows put libraries to install directory

if (WIN32)

  file(GLOB WINDOWS_INSTALL_LIBRARIES

    "${CMAKE_BINARY_DIR}/windows_install_libraries/*.*")

  install(FILES ${WINDOWS_INSTALL_LIBRARIES} DESTINATION bin)

endif (WIN32)

# install menu item and icon

configure_file("${CMAKE_CURRENT_SOURCE_DIR}/misc/program_name.desktop.in"

  "${CMAKE_BINARY_DIR}/${PROGRAM_NAME}.desktop")

configure_file("${CMAKE_CURRENT_SOURCE_DIR}/misc/program_name.png"

  "${CMAKE_BINARY_DIR}/${PROGRAM_NAME}.png" COPYONLY)

find_program(XDG-DESKTOP-MENU xdg-desktop-menu)

find_program(XDG-ICON-RESOURCE xdg-icon-resource)

if (UNIX)

  # first copy files to share/serialplot/

  install(FILES

    ${CMAKE_BINARY_DIR}/${PROGRAM_NAME}.desktop

    ${CMAKE_BINARY_DIR}/${PROGRAM_NAME}.png

    DESTINATION share/${PROGRAM_NAME})

  # install copyright file (in debian format)

  install(FILES

    ${CMAKE_SOURCE_DIR}/debian/copyright

    DESTINATION share/doc/${PROGRAM_NAME}/)

  install(CODE "

  execute_process(COMMAND ${XDG-DESKTOP-MENU} install --novendor ${CMAKE_INSTALL_PREFIX}/share/${PROGRAM_NAME}/${PROGRAM_NAME}.desktop)

  execute_process(COMMAND ${XDG-ICON-RESOURCE} install --novendor --size 256 ${CMAKE_INSTALL_PREFIX}/share/${PROGRAM_NAME}/${PROGRAM_NAME}.png)

")

endif (UNIX)

# uninstalling

configure_file(

  "${CMAKE_CURRENT_SOURCE_DIR}/cmake/cmake_uninstall.cmake.in"

  "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"

  @ONLY)

if (UNIX)

  add_custom_target(uninstall

    COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake

    COMMAND ${XDG-DESKTOP-MENU} uninstall --novendor ${PROGRAM_NAME}.desktop

    COMMAND ${XDG-ICON-RESOURCE} uninstall --novendor --size 256 ${PROGRAM_NAME})

endif (UNIX)

# packaging

if (UNIX)

  set(CPACK_GENERATOR "DEB")

elseif (WIN32)

  set(CPACK_GENERATOR "NSIS")

endif (UNIX)

include(InstallRequiredSystemLibraries)

# configure debian scripts

configure_file(${CMAKE_SOURCE_DIR}/debian/postinst.in ${CMAKE_BINARY_DIR}/debian/postinst)

configure_file(${CMAKE_SOURCE_DIR}/debian/postrm.in ${CMAKE_BINARY_DIR}/debian/postrm)

set(CPACK_PACKAGE_NAME "${PROGRAM_NAME}")

set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "Small and simple software for plotting data from serial port")

set(CPACK_PACKAGE_CONTACT "Hasan Yavuz Özderya <hy@ozderya.net>")

set(CPACK_PACKAGE_VERSION_MAJOR ${MAJOR_VERSION})

set(CPACK_PACKAGE_VERSION_MINOR ${MINOR_VERSION})

set(CPACK_PACKAGE_VERSION_PATCH ${PATCH_VERSION})

set(CPACK_STRIP_FILES TRUE)

set(CPACK_DEBIAN_PACKAGE_DEPENDS "libqt5widgets5 (>= 5.2.1), libqt5serialport5 (>= 5.2.1), libc6 (>= 2.19)")

if (NOT QWT_USE_STATIC)

  set(CPACK_DEBIAN_PACKAGE_DEPENDS "${CPACK_DEBIAN_PACKAGE_DEPENDS}, libqwt6-qt5 (>= 6.1.1)")

endif (NOT QWT_USE_STATIC)

set(CPACK_DEBIAN_PACKAGE_CONTROL_EXTRA

  "${CMAKE_BINARY_DIR}/debian/postinst"

  "${CMAKE_BINARY_DIR}/debian/postrm")

if (UNIX)

  set(CPACK_PACKAGE_EXECUTABLES "${PROGRAM_NAME}")

elseif (WIN32)

  set(CPACK_PACKAGE_EXECUTABLES "${PROGRAM_NAME};${PROGRAM_DISPLAY_NAME}")

  set(CPACK_CREATE_DESKTOP_LINKS "${PROGRAM_NAME}")

  set(CPACK_NSIS_MODIFY_PATH "ON")

  set(CPACK_PACKAGE_ICON "${CMAKE_SOURCE_DIR}/misc/serialplot.bmp")

  string(REPLACE "/" "\\\\" CPACK_PACKAGE_ICON ${CPACK_PACKAGE_ICON})

  set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_SOURCE_DIR}/COPYING")

  set(CPACK_NSIS_MENU_LINKS

    "https://bitbucket.org/hyOzd/serialplot" "SerialPlot source code on bitbucket.org")

endif (UNIX)

if (UNIX)

  # set debian package name

  string(TOLOWER "${CPACK_PACKAGE_NAME}" CPACK_PACKAGE_NAME_LOWERCASE)

  find_program(DPKG_PROGRAM dpkg DOC "dpkg program of Debian-based systems")

  if(DPKG_PROGRAM)

    execute_process(

      COMMAND ${DPKG_PROGRAM} --print-architecture

      OUTPUT_VARIABLE CPACK_DEBIAN_PACKAGE_ARCHITECTURE

      OUTPUT_STRIP_TRAILING_WHITESPACE)

    set(CPACK_PACKAGE_FILE_NAME

      "${CPACK_PACKAGE_NAME_LOWERCASE}_${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}.${CPACK_PACKAGE_VERSION_PATCH}_${CPACK_DEBIAN_PACKAGE_ARCHITECTURE}")

  else(DPKG_PROGRAM)

    set(CPACK_PACKAGE_FILE_NAME

      "${CPACK_PACKAGE_NAME_LOWERCASE}_${PROJECT_VERSION}-${PROJECT_VERSION_REVISION}_${CMAKE_SYSTEM_NAME}")

  endif(DPKG_PROGRAM)

endif (UNIX)

include(CPack)

/*

  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 "mainwindow.h"

#include "ui_mainwindow.h"

#include <QByteArray>

#include <QApplication>

#include <QFileDialog>

#include <QFile>

#include <QTextStream>

#include <QtDebug>

#include <QtEndian>

#include <qwt_plot.h>

#include <limits.h>

#include <cmath>

#include <iostream>

#include <plot.h>

#include "utils.h"

#include "version.h"

#include "floatswap.h"

#if defined(Q_OS_WIN) && defined(QT_STATIC)

#include <QtPlugin>

Q_IMPORT_PLUGIN(QWindowsIntegrationPlugin)

#endif

struct Range

{

    double rmin;

    double rmax;

};

Q_DECLARE_METATYPE(Range);

MainWindow::MainWindow(QWidget *parent) :

    QMainWindow(parent),

    ui(new Ui::MainWindow),

{

    ui->setupUi(this);

    ui->tabWidget->insertTab(0, &portControl, "Port");

    ui->tabWidget->setCurrentIndex(0);

    addToolBar(portControl.toolBar());

    setupAboutDialog();

    // init UI signals

    // menu signals

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

              &aboutDialog, &QWidget::show);

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

                     this, &MainWindow::onExportCsv);

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

                     this, &MainWindow::close);

    QObject::connect(ui->actionGrid, &QAction::toggled, [this](bool show)

                     {

                         ui->plot->showGrid(show);

                         ui->actionMinorGrid->setEnabled(show);

                     });

    ui->actionMinorGrid->setEnabled(ui->actionGrid->isChecked());

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

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

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

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

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

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

    ui->plot->darkBackground(ui->actionDarkBackground->isChecked());

    // port control signals

    QObject::connect(&portControl, &PortControl::portToggled,

                     this, &MainWindow::onPortToggled);

    QObject::connect(&portControl, &PortControl::skipByteRequested,

                     this, &MainWindow::skipByte);

    QObject::connect(ui->spNumOfSamples, SELECT<int>::OVERLOAD_OF(&QSpinBox::valueChanged),

                     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()));

    // setup number of channels spinbox

    QObject::connect(ui->spNumOfChannels,

                     SELECT<int>::OVERLOAD_OF(&QSpinBox::valueChanged),

                     this, &MainWindow::onNumOfChannelsChanged);

    // setup number format buttons

    numberFormatButtons.addButton(ui->rbUint8,  NumberFormat_uint8);

    numberFormatButtons.addButton(ui->rbUint16, NumberFormat_uint16);

    numberFormatButtons.addButton(ui->rbUint32, NumberFormat_uint32);

    numberFormatButtons.addButton(ui->rbInt8,   NumberFormat_int8);

    numberFormatButtons.addButton(ui->rbInt16,  NumberFormat_int16);

    numberFormatButtons.addButton(ui->rbInt32,  NumberFormat_int32);

    numberFormatButtons.addButton(ui->rbFloat,  NumberFormat_float);

    numberFormatButtons.addButton(ui->rbASCII,  NumberFormat_ASCII);

    QObject::connect(&numberFormatButtons, SIGNAL(buttonToggled(int, bool)),

                     this, SLOT(onNumberFormatButtonToggled(int, bool)));

    // 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 arrays and plot

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

    numOfChannels = ui->spNumOfChannels->value();

    // init channel data and curve list

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

    {

        channelBuffers.append(new FrameBuffer(numOfSamples));

        curves.append(new QwtPlotCurve());

        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 grid

    ui->plot->showGrid(ui->actionGrid->isChecked());

    ui->plot->showMinorGrid(ui->actionMinorGrid->isChecked());

    // 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 number format

    if (numberFormatButtons.checkedId() >= 0)

    {

        selectNumberFormat((NumberFormat) numberFormatButtons.checkedId());

    }

    else

    {

        selectNumberFormat(NumberFormat_uint8);

    }

    // Init sps (sample per second) counter

    sampleCount = 0;

    spsLabel.setText("0sps");

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

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

    spsTimer.start(SPS_UPDATE_TIMEOUT * 1000);

    QObject::connect(&spsTimer, &QTimer::timeout,

                     this, &MainWindow::spsTimerTimeout);

    // Init demo mode

    demoCount = 0;

    demoTimer.setInterval(100);

    QObject::connect(&demoTimer, &QTimer::timeout,

                     this, &MainWindow::demoTimerTimeout);

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

                     this, &MainWindow::enableDemo);

    {   // init demo indicator

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

        demoText.setColor(QColor("white"));

        demoText.setBackgroundBrush(Qt::darkRed);

        demoText.setBorderRadius(4);

        demoText.setRenderFlags(Qt::AlignLeft | Qt::AlignTop);

        demoIndicator.setText(demoText);

        demoIndicator.hide();

        demoIndicator.attach(ui->plot);

    }

}

MainWindow::~MainWindow()

{

    for (auto curve : curves)

    {

        // also deletes respective FrameBuffer

        delete curve;

    }

    if (serialPort.isOpen())

    {

        serialPort.close();

    }

    delete ui;

    ui = NULL; // we check if ui is deleted in messageHandler

}

void MainWindow::setupAboutDialog()

{

    Ui_AboutDialog uiAboutDialog;

    uiAboutDialog.setupUi(&aboutDialog);

    QObject::connect(uiAboutDialog.pbAboutQt, &QPushButton::clicked,

                     [](){ QApplication::aboutQt();});

    QString aboutText = uiAboutDialog.lbAbout->text();

    aboutText.replace("$VERSION_STRING$", VERSION_STRING);

    aboutText.replace("$VERSION_REVISION$", VERSION_REVISION);

    uiAboutDialog.lbAbout->setText(aboutText);

}

void MainWindow::onPortToggled(bool open)

{

    // make sure demo mode is disabled

    if (open && isDemoRunning()) enableDemo(false);

    ui->actionDemoMode->setEnabled(!open);

}

void MainWindow::onDataReady()

{

    if (ui->actionPause->isChecked())

    {

        serialPort.clear(QSerialPort::Input);

        return;

    }

    // a package is a set of channel data like {CHAN0_SAMPLE, CHAN1_SAMPLE...}

    int packageSize = sampleSize * numOfChannels;

    int bytesAvailable = serialPort.bytesAvailable();

    if (bytesAvailable > 0 && skipByteRequested)

    {

        serialPort.read(1);

        skipByteRequested = false;

        bytesAvailable--;

    }

    if (bytesAvailable < packageSize) return;

    int numOfPackagesToRead =

        (bytesAvailable - (bytesAvailable % packageSize)) / packageSize;

    double* channelSamples = new double[numOfPackagesToRead*numOfChannels];

    int i = 0;

    while(i < numOfPackagesToRead)

    {

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

        {

            // channelSamples[ci].replace(i, (this->*readSample)());

            channelSamples[ci*numOfPackagesToRead+i] = (this->*readSample)();

        }

        i++;

    }

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

    {

        addChannelData(ci,

                       channelSamples + ci*numOfPackagesToRead,

                       numOfPackagesToRead);

    }

    ui->plot->replot();

    delete channelSamples;

}

void MainWindow::onDataReadyASCII()

{

    while(serialPort.canReadLine())

    {

        QByteArray line = serialPort.readLine();

        // discard data if paused

        if (ui->actionPause->isChecked())

        {

            return;

        }

        line = line.trimmed();

        auto separatedValues = line.split(',');

        int numReadChannels; // effective number of channels to read

        if (separatedValues.length() >= int(numOfChannels))

        {

            numReadChannels = numOfChannels;

        }

        else // there is missing channel data

        {

            numReadChannels = separatedValues.length();

            qWarning() << "Incoming data is missing data for some channels!";

        }

        // parse read line

        for (int ci = 0; ci < numReadChannels; ci++)

        {

            bool ok;

            double channelSample = separatedValues[ci].toDouble(&ok);

            if (ok)

            {

                addChannelData(ci, &channelSample, 1);

            }

            else

            {

                qWarning() << "Data parsing error for channel: " << ci;

            }

        }

        ui->plot->replot();

    }

}

void MainWindow::onPortError(QSerialPort::SerialPortError error)

{

    switch(error)

    {

        case QSerialPort::NoError :

            break;

        case QSerialPort::ResourceError :

            qWarning() << "Port error: resource unavaliable; most likely device removed.";

            if (serialPort.isOpen())

            {

                qWarning() << "Closing port on resource error: " << serialPort.portName();

                portControl.togglePort();

            }

            portControl.loadPortList();

            break;

        case QSerialPort::DeviceNotFoundError:

            qCritical() << "Device doesn't exists: " << serialPort.portName();

            break;

        case QSerialPort::PermissionError:

            qCritical() << "Permission denied. Either you don't have \

required privileges or device is already opened by another process.";

            break;

        case QSerialPort::OpenError:

            qWarning() << "Device is already opened!";

            break;

        case QSerialPort::NotOpenError:

            qCritical() << "Device is not open!";

            break;

        case QSerialPort::ParityError:

            qCritical() << "Parity error detected.";

            break;

        case QSerialPort::FramingError:

            qCritical() << "Framing error detected.";

            break;

        case QSerialPort::BreakConditionError:

            qCritical() << "Break condition is detected.";

            break;

        case QSerialPort::WriteError:

            qCritical() << "An error occurred while writing data.";

            break;

        case QSerialPort::ReadError:

            qCritical() << "An error occurred while reading data.";

            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!";

            break;

        default:

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

            break;

    }

}

void MainWindow::skipByte()

{

    skipByteRequested = true;

}

void MainWindow::addChannelData(unsigned int channel, double* data, unsigned size)

{

    channelBuffers[channel]->addSamples(data, size);

    sampleCount += size;

}

void MainWindow::clearPlot()

{

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

    {

        channelBuffers[ci]->clear();

    }

    ui->plot->replot();

            sampleSize = 1;

            readSample = &MainWindow::readSampleAs<quint8>;

            break;

        case NumberFormat_int8:

            sampleSize = 1;

            readSample = &MainWindow::readSampleAs<qint8>;

            break;

        case NumberFormat_uint16:

            sampleSize = 2;

            readSample = &MainWindow::readSampleAs<quint16>;

            break;

        case NumberFormat_int16:

            sampleSize = 2;

            readSample = &MainWindow::readSampleAs<qint16>;

            break;

        case NumberFormat_uint32:

            sampleSize = 4;

            readSample = &MainWindow::readSampleAs<quint32>;

            break;

        case NumberFormat_int32:

            sampleSize = 4;

            readSample = &MainWindow::readSampleAs<qint32>;

            break;

        case NumberFormat_float:

            sampleSize = 4;

            readSample = &MainWindow::readSampleAs<float>;

            break;

        case NumberFormat_ASCII:

            sampleSize = 0;    // these two members should not be used

            readSample = NULL; // in this mode

            break;

    }

    if (numberFormat == NumberFormat_ASCII)

    {

        QObject::disconnect(&(this->serialPort), &QSerialPort::readyRead, 0, 0);

        QObject::connect(&(this->serialPort), &QSerialPort::readyRead,

                         this, &MainWindow::onDataReadyASCII);

        portControl.enableSkipByte();

    }

    else

    {

        QObject::disconnect(&(this->serialPort), &QSerialPort::readyRead, 0, 0);

        QObject::connect(&(this->serialPort), &QSerialPort::readyRead,

                         this, &MainWindow::onDataReady);

        portControl.enableSkipByte(false);

    }

}

template<typename T> double MainWindow::readSampleAs()

{

    T data;

    this->serialPort.read((char*) &data, sizeof(data));

    if (ui->rbLittleE->isChecked())

    {

        data = qFromLittleEndian(data);

    }

    else

    {

        data = qFromBigEndian(data);

    }

    return double(data);

}

bool MainWindow::isDemoRunning()

{

    return ui->actionDemoMode->isChecked();

}

void MainWindow::spsTimerTimeout()

{

    spsLabel.setText(QString::number(sampleCount/SPS_UPDATE_TIMEOUT) + "sps");

    sampleCount = 0;

}

void MainWindow::demoTimerTimeout()

{

    const double period = 100;

    demoCount++;

    if (demoCount > 100) demoCount = 0;

    if (!ui->actionPause->isChecked())

    {

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

        {

            // we are calculating the fourier components of square wave

            double value = 4*sin(2*M_PI*double((ci+1)*demoCount)/period)/((2*(ci+1))*M_PI);

            addChannelData(ci, &value, 1);

        }

        ui->plot->replot();

    }

}

void MainWindow::enableDemo(bool enabled)

{

    if (enabled)

    {

        if (!serialPort.isOpen())

        {

            demoTimer.start();

            ui->actionDemoMode->setChecked(true);

            demoIndicator.show();

            ui->plot->replot();

        }

        else

        {

            ui->actionDemoMode->setChecked(false);

        }

    }

    else

    {

        demoTimer.stop();

        ui->actionDemoMode->setChecked(false);

        demoIndicator.hide();

        ui->plot->replot();

    }

}

void MainWindow::onExportCsv()

{

    bool wasPaused = ui->actionPause->isChecked();

    ui->actionPause->setChecked(true); // pause plotting

    QString fileName = QFileDialog::getSaveFileName(this, tr("Export CSV File"));

    if (fileName.isNull())  // user canceled export

    {

        ui->actionPause->setChecked(wasPaused);

    }

    else

    {

        QFile file(fileName);

        if (file.open(QIODevice::WriteOnly | QIODevice::Text))

        {

            QTextStream fileStream(&file);

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

            {

                fileStream << "Channel " << ci;

                if (ci != numOfChannels-1) fileStream << ",";

            }

            fileStream << '\n';

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

            {

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

                {

                    fileStream << channelBuffers[ci]->sample(i).y();

                    if (ci != numOfChannels-1) fileStream << ",";

                }

                fileStream << '\n';

            }

        }

        else

        {

            qCritical() << "File open error during export: " << file.error();

        }

    }

}

void MainWindow::messageHandler(QtMsgType type,

                                const QMessageLogContext &context,

                                const QString &msg)

{