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(&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);

   <widget class="QMenu" name="menuHelp">

    <property name="title">

     <string>Help</string>

    </property>

    <addaction name="actionDemoMode"/>

    <addaction name="actionHelpAbout"/>

   </widget>

   <widget class="QMenu" name="menuFile">

    <property name="title">

     <string>File</string>

    </property>

    <addaction name="actionExportCsv"/>

   </widget>

   <addaction name="menuFile"/>

   <addaction name="menuHelp"/>

  </widget>

  <widget class="QToolBar" name="mainToolBar">

   <attribute name="toolBarArea">

    <enum>TopToolBarArea</enum>

   </attribute>

   <attribute name="toolBarBreak">

    <bool>false</bool>

   </attribute>

   <addaction name="actionPause"/>

   <property name="toolTip">

    <string>Toggle Demo Mode</string>

   </property>

  </action>

  <action name="actionExportCsv">

   <property name="text">

    <string>Export CSV</string>

   </property>

   <property name="toolTip">

    <string>Export plot data to CSV</string>

   </property>

  </action>

 </widget>

 <layoutdefault spacing="6" margin="11"/>

 <customwidgets>

  <customwidget>

   <class>QwtPlot</class>

   <extends>QFrame</extends>

   <header>qwt_plot.h</header>

   <container>1</container>

  </customwidget>

 </customwidgets>

 <resources/>

 <connections/>