setupAboutDialog();

    // init view menu

    for (auto a : plotMan->menuActions())

    {

        ui->menuView->addAction(a);

    }

    ui->menuView->addSeparator();

    QMenu* tbMenu = ui->menuView->addMenu("Toolbars");

    tbMenu->addAction(ui->plotToolBar->toggleViewAction());

    tbMenu->addAction(portControl.toolBar()->toggleViewAction());

    // init UI signals

    // Help menu signals

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

              &aboutDialog, &QWidget::show);

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

                     [](){QDesktopServices::openUrl(QUrl(BUG_REPORT_URL));});

    // File menu signals

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

                     this, &MainWindow::onExportCsv);

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

                     this, &MainWindow::onSaveSettings);

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

                     this, &MainWindow::onLoadSettings);

    ui->actionQuit->setShortcutContext(Qt::ApplicationShortcut);

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

                     this, &MainWindow::close);

    // port control signals

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

                     this, &MainWindow::onPortToggled);

    connect(&plotControlPanel, &PlotControlPanel::numOfSamplesChanged,

            this, &MainWindow::onNumOfSamplesChanged);

    connect(&plotControlPanel, &PlotControlPanel::numOfSamplesChanged,

            plotMan, &PlotManager::onNumOfSamplesChanged);

    connect(&plotControlPanel, &PlotControlPanel::scaleChanged,

            plotMan, &PlotManager::setAxis);

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

                     this, SLOT(clearPlot()));

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

                     plotMan, &PlotManager::flashSnapshotOverlay);

    // init port signals

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

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

    // init data format and reader

    QObject::connect(&channelMan, &ChannelManager::dataAdded,

                     plotMan, &PlotManager::replot);

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

                     &channelMan, &ChannelManager::pause);

    QObject::connect(&recordPanel, &RecordPanel::recordStarted,

                     &dataFormatPanel, &DataFormatPanel::startRecording);

    QObject::connect(&recordPanel, &RecordPanel::recordStopped,

                     &dataFormatPanel, &DataFormatPanel::stopRecording);

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

                     [this](bool enabled)

                     {

                         if (enabled && !recordPanel.recordPaused())

                         {

                             dataFormatPanel.pause(true);

                         }

                         else

                         {

                             dataFormatPanel.pause(false);

                         }

                     });

    QObject::connect(&recordPanel, &RecordPanel::recordPausedChanged,

                     [this](bool enabled)

                     {

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

                         {

                             dataFormatPanel.pause(false);

                         }

                     });

    // init data arrays and plot

    numOfSamples = plotControlPanel.numOfSamples();

    unsigned numOfChannels = dataFormatPanel.numOfChannels();

    channelMan.setNumOfSamples(numOfSamples);

    channelMan.setNumOfChannels(dataFormatPanel.numOfChannels());

    connect(&dataFormatPanel, &DataFormatPanel::numOfChannelsChanged,

            &channelMan, &ChannelManager::setNumOfChannels);

    connect(&channelMan, &ChannelManager::numOfChannelsChanged,

            this, &MainWindow::onNumOfChannelsChanged);

    plotControlPanel.setChannelInfoModel(channelMan.infoModel());

    // init curve list

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

    {

        plotMan->addCurve(channelMan.channelName(i), channelMan.channelBuffer(i));

    }

    // init auto scale

    plotMan->setAxis(plotControlPanel.autoScale(),

                     plotControlPanel.yMin(), plotControlPanel.yMax());

    // Init sps (sample per second) counter

    spsLabel.setText("0sps");

    spsLabel.setToolTip("samples per second (per channel)");

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

    QObject::connect(&dataFormatPanel,

                     &DataFormatPanel::samplesPerSecondChanged,

                     this, &MainWindow::onSpsChanged);

    // init demo

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

                     this, &MainWindow::enableDemo);

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

                     plotMan, &PlotManager::showDemoIndicator);

    // load default settings

    QSettings settings("serialplot", "serialplot");

    loadAllSettings(&settings);

    // ensure command panel has 1 command if none loaded

    if (!commandPanel.numOfCommands())

    {

        commandPanel.newCommandAction()->trigger();

    }

    // Important: This should be after newCommandAction is triggered

    // (above) we don't want user to be greeted with command panel on

    // the very first run.

    connect(commandPanel.newCommandAction(), &QAction::triggered, [this]()

            {

                this->ui->tabWidget->setCurrentWidget(&commandPanel);

            });

}

MainWindow::~MainWindow()

{

    // save settings

    QSettings settings("serialplot", "serialplot");

    saveAllSettings(&settings);

    if (serialPort.isOpen())

    {

        serialPort.close();

    }

    delete plotMan;

    delete ui;

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

}

void MainWindow::closeEvent(QCloseEvent * event)

{

    if (!snapshotMan.isAllSaved())

    {

        auto clickedButton = QMessageBox::warning(

            this, "Closing SerialPlot",

            "There are un-saved snapshots. If you close you will loose the data.",

            QMessageBox::Discard | QMessageBox::Discard,

            QMessageBox::Cancel);

        if (clickedButton == QMessageBox::Cancel)

        {

            event->ignore();

            return;

        }

    }

    QMainWindow::closeEvent(event);

}

void MainWindow::setupAboutDialog()

{

        }

        else

        {

            canceled = !confirmOverwrite(selectedFile);

        }

    }

    overwriteSelected = false;

    if (canceled)

    {

        recordAction.setChecked(false);

    }

    else

    {

        startRecording();

    }

}

bool RecordPanel::incrementFileName(void)

{

    QFileInfo fileInfo(selectedFile);

    QString base = fileInfo.completeBaseName();

    QRegularExpression regex("(.*?)(\\d+)(?!.*\\d)(.*)");

    auto match = regex.match(base);

    if (match.hasMatch())

    {

        bool ok;

        int fileNum = match.captured(2).toInt(&ok);

        base = match.captured(1) + QString::number(fileNum + 1) + match.captured(3);

    }

    else

    {

        base += "_1";

    }

    QString suffix = fileInfo.suffix();;

    if (!suffix.isEmpty())

    {

        suffix = "." + suffix;

    }

    QString autoFileName = fileInfo.path() + "/" + base + suffix;

    // check if auto generated file name exists, ask user another name

    if (QFile::exists(autoFileName))

    {

        if (!confirmOverwrite(autoFileName))

        {

            return false;

        }

    }

    else

    {

        selectedFile = autoFileName;

    }

    ui->lbFileName->setText(selectedFile);

    return true;

}

bool RecordPanel::confirmOverwrite(QString fileName)

{

    // prepare message box

    QMessageBox mb(parentWidget());

    mb.setWindowTitle(tr("File Already Exists"));

    mb.setIcon(QMessageBox::Warning);

    mb.setText(tr("File (%1) already exists. How to continue?").arg(fileName));

    auto bCancel    = mb.addButton(QMessageBox::Cancel);

    auto bOverwrite = mb.addButton(tr("Overwrite"), QMessageBox::DestructiveRole);

    mb.addButton(tr("Select Another File"), QMessageBox::YesRole);

    mb.setEscapeButton(bCancel);

    // show message box

    mb.exec();

    if (mb.clickedButton() == bCancel)

    {

        return false;

    }

    else if (mb.clickedButton() == bOverwrite)

    {

        selectedFile = fileName;

        return true;

    }

    else                    // select button

    {

        return selectFile();

    }

}

void RecordPanel::startRecording(void)

{

    QStringList cn;

    _recorder->startRecording(selectedFile, cn);

    emit recordStarted();

}

void RecordPanel::stopRecording(void)

{

    emit recordStopped();

    _recorder->stopRecording();

}

/*

  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"

namespace Ui {

class RecordPanel;

}

class RecordPanel : public QWidget

{

    Q_OBJECT

public:

    explicit RecordPanel(DataRecorder* recorder, QWidget* parent = 0);

    ~RecordPanel();

    QToolBar* toolbar();

    bool isRecording();

    bool recordPaused();

signals:

    void recordStarted();

    void recordStopped();

    void recordPausedChanged(bool enabled);

private:

    Ui::RecordPanel *ui;

    QToolBar recordToolBar;

    QAction recordAction;

    QString selectedFile;

    bool overwriteSelected;

    DataRecorder* _recorder;

    /**

     * @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);

    void startRecording(void);

    void stopRecording(void);

private slots:

    /**

     * @brief Opens up the file select dialog

     *

     * If you cancel the selection operation, currently selected file is not

     * changed.

     *

     * @return true if file selected, false if user cancels

     */

    bool selectFile();

    void onRecord(bool start);

};

#endif // RECORDPANEL_H

<?xml version="1.0" encoding="UTF-8"?>

<ui version="4.0">

 <class>RecordPanel</class>

 <widget class="QWidget" name="RecordPanel">

  <property name="geometry">

   <rect>

    <x>0</x>

    <y>0</y>

    <width>532</width>

    <height>152</height>

   </rect>

  </property>

  <property name="windowTitle">

   <string>Form</string>

  </property>

  <layout class="QHBoxLayout" name="horizontalLayout_2">

   <item>

    <layout class="QVBoxLayout" name="verticalLayout">

     <item>

      <layout class="QHBoxLayout" name="horizontalLayout">

       <item>

        <widget class="QPushButton" name="pbBrowse">

         <property name="toolTip">

          <string>Select record file</string>

         </property>

         <property name="text">

          <string>Browse</string>

         </property>

        </widget>

       </item>

       <item>

        <widget class="QLabel" name="lbFileName">

         <property name="sizePolicy">

          <sizepolicy hsizetype="MinimumExpanding" vsizetype="Preferred">

           <horstretch>0</horstretch>

           <verstretch>0</verstretch>

          </sizepolicy>

         </property>

         <property name="text">

          <string>Select file...</string>

         </property>

        </widget>

       </item>

      </layout>

     </item>

     <item>

      <widget class="QCheckBox" name="cbRecordPaused">

       <property name="toolTip">

        <string>Continue recording to file even when plotting is paused</string>

       </property>

       <property name="text">

        <string>Record while paused</string>

       </property>

       <property name="checked">

        <bool>true</bool>

       </property>

      </widget>

     </item>

     <item>

      <widget class="QCheckBox" name="cbAutoIncrement">

       <property name="toolTip">

        <string>Increments file name automatically everytime a new recording starts</string>

       </property>

       <property name="text">

        <string>Auto increment file name</string>

       </property>

       <property name="checked">

        <bool>true</bool>

       </property>

      </widget>

     </item>

     <item>

       <property name="text">

        <string>Stop recording when port closed</string>

       </property>

       <property name="checked">

        <bool>true</bool>

       </property>

      </widget>

     </item>

     <item>

      <widget class="QCheckBox" name="cbDisableBuffering">

       <property name="toolTip">

        <string>Do not buffer when writing to file. Check this if you are using other software to open the file during recording.</string>

       </property>

       <property name="text">

        <string>Disable buffering</string>

       </property>

      </widget>

     </item>

     <item>

      <spacer name="verticalSpacer">

       <property name="orientation">

        <enum>Qt::Vertical</enum>

       </property>

       <property name="sizeHint" stdset="0">

        <size>

         <width>20</width>

         <height>40</height>

        </size>

       </property>

      </spacer>

     </item>

    </layout>

   </item>

   <item>

    <layout class="QVBoxLayout" name="verticalLayout_2">

     <item>

      <widget class="QToolButton" name="pbRecord">

       <property name="minimumSize">

        <size>

         <width>85</width>

         <height>50</height>

        </size>

       </property>

       <property name="toolTip">

        <string>Start/Stop Recording</string>

       </property>

       <property name="text">

        <string>Record</string>

       </property>

      </widget>

     </item>

     <item>

      <spacer name="verticalSpacer_2">

       <property name="orientation">

        <enum>Qt::Vertical</enum>

       </property>

       <property name="sizeHint" stdset="0">

        <size>

         <width>20</width>

         <height>40</height>

        </size>

       </property>

      </spacer>

     </item>

    </layout>

   </item>

  </layout>

 </widget>

 <resources/>

 <connections/>

</ui>