Peter M. Groen / openhantek

dsowidget.cpp 28.3 KB
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////////////////////////////////////////////////////////////////////////////////
//
//  OpenHantek
//  dsowidget.cpp
//
//  Copyright (C) 2010  Oliver Haag
//  oliver.haag@gmail.com
//
//  This program 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.
//
//  This program 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
//  this program.  If not, see <http://www.gnu.org/licenses/>.
//
////////////////////////////////////////////////////////////////////////////////

#include <cmath>

#include <QGridLayout>
#include <QTimer>
#include <QLabel>
#include <QFileDialog>

#include "dsowidget.h"

#include "hantek/definitions.h"
#include "utils/printutils.h"
#include "utils/dsoStrings.h"
#include "dataanalyzer.h"
#include "exporter.h"
#include "glscope.h"
#include "levelslider.h"
#include "settings.h"

////////////////////////////////////////////////////////////////////////////////
// class DsoWidget
/// \brief Initializes the components of the oszilloscope-screen.
/// \param settings The settings object containing the oscilloscope settings.
/// \param dataAnalyzer The data analyzer that should be used as data source.
/// \param parent The parent widget.
/// \param flags Flags for the window manager.
DsoWidget::DsoWidget(DsoSettings *settings, DataAnalyzer *dataAnalyzer,
                     QWidget *parent, Qt::WindowFlags flags)
    : QWidget(parent, flags) {
  this->settings = settings;
  this->dataAnalyzer = dataAnalyzer;

  // Palette for this widget
  QPalette palette;
  palette.setColor(QPalette::Background,
                   this->settings->view.color.screen.background);
  palette.setColor(QPalette::WindowText,
                   this->settings->view.color.screen.text);

  // The OpenGL accelerated scope widgets
  this->generator = new GlGenerator(this->settings, this);
  this->generator->setDataAnalyzer(this->dataAnalyzer);
  this->mainScope = new GlScope(this->settings);
  this->mainScope->setGenerator(this->generator);
  this->zoomScope = new GlScope(this->settings);
  this->zoomScope->setGenerator(this->generator);
  this->zoomScope->setZoomMode(true);

#ifdef OS_DARWIN
  // Workaround for https://bugreports.qt-project.org/browse/QTBUG-8580
  this->mainScope->hide();
  this->mainScope->show();
#endif

  // The offset sliders for all possible channels
  this->offsetSlider = new LevelSlider(Qt::RightArrow);
  for (int channel = 0; channel < this->settings->scope.voltage.count();
       ++channel) {
    this->offsetSlider->addSlider(this->settings->scope.voltage[channel].name,
                                  channel);
    this->offsetSlider->setColor(
        channel, this->settings->view.color.screen.voltage[channel]);
    this->offsetSlider->setLimits(channel, -DIVS_VOLTAGE / 2, DIVS_VOLTAGE / 2);
    this->offsetSlider->setStep(channel, 0.2);
    this->offsetSlider->setValue(channel,
                                 this->settings->scope.voltage[channel].offset);
    this->offsetSlider->setVisible(channel,
                                   this->settings->scope.voltage[channel].used);
  }
  for (int channel = 0; channel < this->settings->scope.voltage.count();
       ++channel) {
    this->offsetSlider->addSlider(this->settings->scope.spectrum[channel].name,
                                  this->settings->scope.voltage.count() +
                                      channel);
    this->offsetSlider->setColor(
        this->settings->scope.voltage.count() + channel,
        this->settings->view.color.screen.spectrum[channel]);
    this->offsetSlider->setLimits(this->settings->scope.voltage.count() +
                                      channel,
                                  -DIVS_VOLTAGE / 2, DIVS_VOLTAGE / 2);
    this->offsetSlider->setStep(this->settings->scope.voltage.count() + channel,
                                0.2);
    this->offsetSlider->setValue(
        this->settings->scope.voltage.count() + channel,
        this->settings->scope.spectrum[channel].offset);
    this->offsetSlider->setVisible(
        this->settings->scope.voltage.count() + channel,
        this->settings->scope.spectrum[channel].used);
  }

  // The triggerPosition slider
  this->triggerPositionSlider = new LevelSlider(Qt::DownArrow);
  this->triggerPositionSlider->addSlider();
  this->triggerPositionSlider->setLimits(0, 0.0, 1.0);
  this->triggerPositionSlider->setStep(0, 0.2 / DIVS_TIME);
  this->triggerPositionSlider->setValue(0,
                                        this->settings->scope.trigger.position);
  this->triggerPositionSlider->setVisible(0, true);

  // The sliders for the trigger levels
  this->triggerLevelSlider = new LevelSlider(Qt::LeftArrow);
  for (int channel = 0; channel < (int)this->settings->scope.physicalChannels;
       ++channel) {
    this->triggerLevelSlider->addSlider(channel);
    this->triggerLevelSlider->setColor(
        channel,
        (!this->settings->scope.trigger.special &&
         channel == (int)this->settings->scope.trigger.source)
            ? this->settings->view.color.screen.voltage[channel]
            : this->settings->view.color.screen.voltage[channel].darker());
    this->adaptTriggerLevelSlider(channel);
    this->triggerLevelSlider->setValue(
        channel, this->settings->scope.voltage[channel].trigger);
    this->triggerLevelSlider->setVisible(
        channel, this->settings->scope.voltage[channel].used);
  }

  // The marker slider
  this->markerSlider = new LevelSlider(Qt::UpArrow);
  for (int marker = 0; marker < MARKER_COUNT; ++marker) {
    this->markerSlider->addSlider(QString::number(marker + 1), marker);
    this->markerSlider->setLimits(marker, -DIVS_TIME / 2, DIVS_TIME / 2);
    this->markerSlider->setStep(marker, 0.2);
    this->markerSlider->setValue(
        marker, this->settings->scope.horizontal.marker[marker]);
    this->markerSlider->setVisible(marker, true);
    this->settings->scope.horizontal.marker_visible[marker] = true;
  }

  // The table for the settings
  this->settingsTriggerLabel = new QLabel();
  this->settingsTriggerLabel->setMinimumWidth(160);
  this->settingsRecordLengthLabel = new QLabel();
  this->settingsRecordLengthLabel->setAlignment(Qt::AlignRight);
  this->settingsRecordLengthLabel->setPalette(palette);
  this->settingsSamplerateLabel = new QLabel();
  this->settingsSamplerateLabel->setAlignment(Qt::AlignRight);
  this->settingsSamplerateLabel->setPalette(palette);
  this->settingsTimebaseLabel = new QLabel();
  this->settingsTimebaseLabel->setAlignment(Qt::AlignRight);
  this->settingsTimebaseLabel->setPalette(palette);
  this->settingsFrequencybaseLabel = new QLabel();
  this->settingsFrequencybaseLabel->setAlignment(Qt::AlignRight);
  this->settingsFrequencybaseLabel->setPalette(palette);
  this->settingsLayout = new QHBoxLayout();
  this->settingsLayout->addWidget(this->settingsTriggerLabel);
  this->settingsLayout->addWidget(this->settingsRecordLengthLabel, 1);
  this->settingsLayout->addWidget(this->settingsSamplerateLabel, 1);
  this->settingsLayout->addWidget(this->settingsTimebaseLabel, 1);
  this->settingsLayout->addWidget(this->settingsFrequencybaseLabel, 1);

  // The table for the marker details
  this->markerInfoLabel = new QLabel();
  this->markerInfoLabel->setMinimumWidth(160);
  this->markerInfoLabel->setPalette(palette);
  this->markerTimeLabel = new QLabel();
  this->markerTimeLabel->setAlignment(Qt::AlignRight);
  this->markerTimeLabel->setPalette(palette);
  this->markerFrequencyLabel = new QLabel();
  this->markerFrequencyLabel->setAlignment(Qt::AlignRight);
  this->markerFrequencyLabel->setPalette(palette);
  this->markerTimebaseLabel = new QLabel();
  this->markerTimebaseLabel->setAlignment(Qt::AlignRight);
  this->markerTimebaseLabel->setPalette(palette);
  this->markerFrequencybaseLabel = new QLabel();
  this->markerFrequencybaseLabel->setAlignment(Qt::AlignRight);
  this->markerFrequencybaseLabel->setPalette(palette);
  this->markerLayout = new QHBoxLayout();
  this->markerLayout->addWidget(this->markerInfoLabel);
  this->markerLayout->addWidget(this->markerTimeLabel, 1);
  this->markerLayout->addWidget(this->markerFrequencyLabel, 1);
  this->markerLayout->addWidget(this->markerTimebaseLabel, 1);
  this->markerLayout->addWidget(this->markerFrequencybaseLabel, 1);

  // The table for the measurements
  QPalette tablePalette = palette;
  this->measurementLayout = new QGridLayout();
  this->measurementLayout->setColumnMinimumWidth(0, 64);
  this->measurementLayout->setColumnMinimumWidth(1, 32);
  this->measurementLayout->setColumnStretch(2, 2);
  this->measurementLayout->setColumnStretch(3, 2);
  this->measurementLayout->setColumnStretch(4, 3);
  this->measurementLayout->setColumnStretch(5, 3);
  for (int channel = 0; channel < this->settings->scope.voltage.count();
       ++channel) {
    tablePalette.setColor(QPalette::WindowText,
                          this->settings->view.color.screen.voltage[channel]);
    this->measurementNameLabel.append(
        new QLabel(this->settings->scope.voltage[channel].name));
    this->measurementNameLabel[channel]->setPalette(tablePalette);
    this->measurementMiscLabel.append(new QLabel());
    this->measurementMiscLabel[channel]->setPalette(tablePalette);
    this->measurementGainLabel.append(new QLabel());
    this->measurementGainLabel[channel]->setAlignment(Qt::AlignRight);
    this->measurementGainLabel[channel]->setPalette(tablePalette);
    tablePalette.setColor(QPalette::WindowText,
                          this->settings->view.color.screen.spectrum[channel]);
    this->measurementMagnitudeLabel.append(new QLabel());
    this->measurementMagnitudeLabel[channel]->setAlignment(Qt::AlignRight);
    this->measurementMagnitudeLabel[channel]->setPalette(tablePalette);
    this->measurementAmplitudeLabel.append(new QLabel());
    this->measurementAmplitudeLabel[channel]->setAlignment(Qt::AlignRight);
    this->measurementAmplitudeLabel[channel]->setPalette(palette);
    this->measurementFrequencyLabel.append(new QLabel());
    this->measurementFrequencyLabel[channel]->setAlignment(Qt::AlignRight);
    this->measurementFrequencyLabel[channel]->setPalette(palette);
    this->setMeasurementVisible(channel,
                                this->settings->scope.voltage[channel].used);
    this->measurementLayout->addWidget(this->measurementNameLabel[channel],
                                       channel, 0);
    this->measurementLayout->addWidget(this->measurementMiscLabel[channel],
                                       channel, 1);
    this->measurementLayout->addWidget(this->measurementGainLabel[channel],
                                       channel, 2);
    this->measurementLayout->addWidget(this->measurementMagnitudeLabel[channel],
                                       channel, 3);
    this->measurementLayout->addWidget(this->measurementAmplitudeLabel[channel],
                                       channel, 4);
    this->measurementLayout->addWidget(this->measurementFrequencyLabel[channel],
                                       channel, 5);
    if ((unsigned int)channel < this->settings->scope.physicalChannels)
      this->updateVoltageCoupling(channel);
    else
      this->updateMathMode();
    this->updateVoltageDetails(channel);
    this->updateSpectrumDetails(channel);
  }

  // The layout for the widgets
  this->mainLayout = new QGridLayout();
  this->mainLayout->setColumnStretch(2, 1); // Scopes increase their size
  this->mainLayout->setRowStretch(3, 1);
  // Bars around the scope, needed because the slider-drawing-area is outside
  // the scope at min/max
  this->mainLayout->setColumnMinimumWidth(
      1, this->triggerPositionSlider->preMargin());
  this->mainLayout->setColumnMinimumWidth(
      3, this->triggerPositionSlider->postMargin());
  this->mainLayout->setRowMinimumHeight(2, this->offsetSlider->preMargin());
  this->mainLayout->setRowMinimumHeight(4, this->offsetSlider->postMargin());
  this->mainLayout->setRowMinimumHeight(6, 4);
  this->mainLayout->setRowMinimumHeight(8, 4);
  this->mainLayout->setRowMinimumHeight(10, 8);
  this->mainLayout->setSpacing(0);
  this->mainLayout->addLayout(this->settingsLayout, 0, 0, 1, 5);
  this->mainLayout->addWidget(this->mainScope, 3, 2);
  this->mainLayout->addWidget(this->offsetSlider, 2, 0, 3, 2, Qt::AlignRight);
  this->mainLayout->addWidget(this->triggerPositionSlider, 1, 1, 2, 3,
                              Qt::AlignBottom);
  this->mainLayout->addWidget(this->triggerLevelSlider, 2, 3, 3, 2,
                              Qt::AlignLeft);
  this->mainLayout->addWidget(this->markerSlider, 4, 1, 2, 3, Qt::AlignTop);
  this->mainLayout->addLayout(this->markerLayout, 7, 0, 1, 5);
  this->mainLayout->addWidget(this->zoomScope, 9, 2);
  this->mainLayout->addLayout(this->measurementLayout, 11, 0, 1, 5);

  // Apply settings and update measured values
  this->updateTriggerDetails();
  this->updateRecordLength(this->settings->scope.horizontal.recordLength);
  this->updateFrequencybase(this->settings->scope.horizontal.frequencybase);
  this->updateSamplerate(this->settings->scope.horizontal.samplerate);
  this->updateTimebase(this->settings->scope.horizontal.timebase);
  this->updateZoom(this->settings->view.zoom);

  // The widget itself
  this->setPalette(palette);
  this->setBackgroundRole(QPalette::Background);
  this->setAutoFillBackground(true);
  this->setLayout(this->mainLayout);

  // Connect change-signals of sliders
  this->connect(this->offsetSlider, SIGNAL(valueChanged(int, double)), this,
                SLOT(updateOffset(int, double)));
  this->connect(this->triggerPositionSlider, SIGNAL(valueChanged(int, double)),
                this, SLOT(updateTriggerPosition(int, double)));
  this->connect(this->triggerLevelSlider, SIGNAL(valueChanged(int, double)),
                this, SLOT(updateTriggerLevel(int, double)));
  this->connect(this->markerSlider, SIGNAL(valueChanged(int, double)), this,
                SLOT(updateMarker(int, double)));
  this->connect(this->markerSlider, SIGNAL(valueChanged(int, double)),
                this->mainScope, SLOT(update()));
  this->connect(this->markerSlider, SIGNAL(valueChanged(int, double)),
                this->zoomScope, SLOT(update()));

  // Connect other signals
  this->connect(this->dataAnalyzer, SIGNAL(analyzed(unsigned long)), this,
                SLOT(dataAnalyzed()));
  this->connect(this->dataAnalyzer, SIGNAL(analyzed(unsigned long)), this,
                SLOT(updateRecordLength(unsigned long)));
}

/// \brief Stops the oscilloscope thread and the timer.
DsoWidget::~DsoWidget() {}

/// \brief Set the trigger level sliders minimum and maximum to the new values.
void DsoWidget::adaptTriggerLevelSlider(unsigned int channel) {
  this->triggerLevelSlider->setLimits(
      channel,
      (-DIVS_VOLTAGE / 2 - this->settings->scope.voltage[channel].offset) *
          this->settings->scope.voltage[channel].gain,
      (DIVS_VOLTAGE / 2 - this->settings->scope.voltage[channel].offset) *
          this->settings->scope.voltage[channel].gain);
  this->triggerLevelSlider->setStep(
      channel, this->settings->scope.voltage[channel].gain * 0.2);
}

/// \brief Show/Hide a line of the measurement table.
void DsoWidget::setMeasurementVisible(unsigned int channel, bool visible) {
  this->measurementNameLabel[channel]->setVisible(visible);
  this->measurementMiscLabel[channel]->setVisible(visible);
  this->measurementGainLabel[channel]->setVisible(visible);
  this->measurementMagnitudeLabel[channel]->setVisible(visible);
  this->measurementAmplitudeLabel[channel]->setVisible(visible);
  this->measurementFrequencyLabel[channel]->setVisible(visible);
  if (!visible) {
    this->measurementGainLabel[channel]->setText(QString());
    this->measurementMagnitudeLabel[channel]->setText(QString());
    this->measurementAmplitudeLabel[channel]->setText(QString());
    this->measurementFrequencyLabel[channel]->setText(QString());
  }
}

/// \brief Update the label about the marker measurements
void DsoWidget::updateMarkerDetails() {
  double divs = fabs(this->settings->scope.horizontal.marker[1] -
                     this->settings->scope.horizontal.marker[0]);
  double time = divs * this->settings->scope.horizontal.timebase;

  if (this->settings->view.zoom) {
    this->markerInfoLabel->setText(
        tr("Zoom x%L1").arg(DIVS_TIME / divs, -1, 'g', 3));
    this->markerTimebaseLabel->setText(
        valueToString(time / DIVS_TIME, UNIT_SECONDS, 3) +
        tr("/div"));
    this->markerFrequencybaseLabel->setText(
        valueToString(
            divs * this->settings->scope.horizontal.frequencybase / DIVS_TIME,
            UNIT_HERTZ, 4) +
        tr("/div"));
  }
  this->markerTimeLabel->setText(
      valueToString(time, UNIT_SECONDS, 4));
  this->markerFrequencyLabel->setText(
      valueToString(1.0 / time, UNIT_HERTZ, 4));
}

/// \brief Update the label about the trigger settings
void DsoWidget::updateSpectrumDetails(unsigned int channel) {
  this->setMeasurementVisible(channel,
                              this->settings->scope.voltage[channel].used ||
                                  this->settings->scope.spectrum[channel].used);

  if (this->settings->scope.spectrum[channel].used)
    this->measurementMagnitudeLabel[channel]->setText(
        valueToString(this->settings->scope.spectrum[channel].magnitude,
                              UNIT_DECIBEL, 3) +
        tr("/div"));
  else
    this->measurementMagnitudeLabel[channel]->setText(QString());
}

/// \brief Update the label about the trigger settings
void DsoWidget::updateTriggerDetails() {
  // Update the trigger details
  QPalette tablePalette = this->palette();
  tablePalette.setColor(QPalette::WindowText,
                        this->settings->view.color.screen
                            .voltage[this->settings->scope.trigger.source]);
  this->settingsTriggerLabel->setPalette(tablePalette);
  QString levelString = valueToString(
      this->settings->scope.voltage[this->settings->scope.trigger.source]
          .trigger,
      UNIT_VOLTS, 3);
  QString pretriggerString =
      tr("%L1%").arg((int)(this->settings->scope.trigger.position * 100 + 0.5));
  this->settingsTriggerLabel->setText(
      tr("%1  %2  %3  %4")
          .arg(this->settings->scope
                   .voltage[this->settings->scope.trigger.source]
                   .name,
               Dso::slopeString(this->settings->scope.trigger.slope),
               levelString, pretriggerString));

  /// \todo This won't work for special trigger sources
}

/// \brief Update the label about the trigger settings
void DsoWidget::updateVoltageDetails(unsigned int channel) {
  if (channel >= (unsigned int)this->settings->scope.voltage.count())
    return;

  this->setMeasurementVisible(channel,
                              this->settings->scope.voltage[channel].used ||
                                  this->settings->scope.spectrum[channel].used);

  if (this->settings->scope.voltage[channel].used)
    this->measurementGainLabel[channel]->setText(
        valueToString(this->settings->scope.voltage[channel].gain,
                              UNIT_VOLTS, 3) +
        tr("/div"));
  else
    this->measurementGainLabel[channel]->setText(QString());
}

/// \brief Handles frequencybaseChanged signal from the horizontal dock.
/// \param frequencybase The frequencybase used for displaying the trace.
void DsoWidget::updateFrequencybase(double frequencybase) {
  this->settingsFrequencybaseLabel->setText(
      valueToString(frequencybase, UNIT_HERTZ, 4) + tr("/div"));
}

/// \brief Updates the samplerate field after changing the samplerate.
/// \param samplerate The samplerate set in the oscilloscope.
void DsoWidget::updateSamplerate(double samplerate) {
  this->settingsSamplerateLabel->setText(
      valueToString(samplerate, UNIT_SAMPLES, 4) + tr("/s"));
}

/// \brief Handles timebaseChanged signal from the horizontal dock.
/// \param timebase The timebase used for displaying the trace.
void DsoWidget::updateTimebase(double timebase) {
  this->settingsTimebaseLabel->setText(
      valueToString(timebase, UNIT_SECONDS, 4) + tr("/div"));

  this->updateMarkerDetails();
}

/// \brief Handles magnitudeChanged signal from the spectrum dock.
/// \param channel The channel whose magnitude was changed.
void DsoWidget::updateSpectrumMagnitude(unsigned int channel) {
  this->updateSpectrumDetails(channel);
}

/// \brief Handles usedChanged signal from the spectrum dock.
/// \param channel The channel whose used-state was changed.
/// \param used The new used-state for the channel.
void DsoWidget::updateSpectrumUsed(unsigned int channel, bool used) {
  if (channel >= (unsigned int)this->settings->scope.voltage.count())
    return;

  this->offsetSlider->setVisible(
      this->settings->scope.voltage.count() + channel, used);

  this->updateSpectrumDetails(channel);
}

/// \brief Handles modeChanged signal from the trigger dock.
void DsoWidget::updateTriggerMode() { this->updateTriggerDetails(); }

/// \brief Handles slopeChanged signal from the trigger dock.
void DsoWidget::updateTriggerSlope() { this->updateTriggerDetails(); }

/// \brief Handles sourceChanged signal from the trigger dock.
void DsoWidget::updateTriggerSource() {
  // Change the colors of the trigger sliders
  if (this->settings->scope.trigger.special ||
      this->settings->scope.trigger.source >=
          this->settings->scope.physicalChannels)
    this->triggerPositionSlider->setColor(
        0, this->settings->view.color.screen.border);
  else
    this->triggerPositionSlider->setColor(
        0, this->settings->view.color.screen
               .voltage[this->settings->scope.trigger.source]);

  for (int channel = 0; channel < (int)this->settings->scope.physicalChannels;
       ++channel)
    this->triggerLevelSlider->setColor(
        channel,
        (!this->settings->scope.trigger.special &&
         channel == (int)this->settings->scope.trigger.source)
            ? this->settings->view.color.screen.voltage[channel]
            : this->settings->view.color.screen.voltage[channel].darker());

  this->updateTriggerDetails();
}

/// \brief Handles couplingChanged signal from the voltage dock.
/// \param channel The channel whose coupling was changed.
void DsoWidget::updateVoltageCoupling(unsigned int channel) {
  if (channel >= (unsigned int)this->settings->scope.voltage.count())
    return;

  this->measurementMiscLabel[channel]->setText(Dso::couplingString(
      (Dso::Coupling)this->settings->scope.voltage[channel].misc));
}

/// \brief Handles modeChanged signal from the voltage dock.
void DsoWidget::updateMathMode() {
  this->measurementMiscLabel[this->settings->scope.physicalChannels]->setText(
      Dso::mathModeString((Dso::MathMode)this->settings->scope
                              .voltage[this->settings->scope.physicalChannels]
                              .misc));
}

/// \brief Handles gainChanged signal from the voltage dock.
/// \param channel The channel whose gain was changed.
void DsoWidget::updateVoltageGain(unsigned int channel) {
  if (channel >= (unsigned int)this->settings->scope.voltage.count())
    return;

  if (channel < this->settings->scope.physicalChannels)
    this->adaptTriggerLevelSlider(channel);

  this->updateVoltageDetails(channel);
}

/// \brief Handles usedChanged signal from the voltage dock.
/// \param channel The channel whose used-state was changed.
/// \param used The new used-state for the channel.
void DsoWidget::updateVoltageUsed(unsigned int channel, bool used) {
  if (channel >= (unsigned int)this->settings->scope.voltage.count())
    return;

  this->offsetSlider->setVisible(channel, used);
  this->triggerLevelSlider->setVisible(channel, used);
  this->setMeasurementVisible(channel,
                              this->settings->scope.voltage[channel].used);

  this->updateVoltageDetails(channel);
}

/// \brief Change the record length.
void DsoWidget::updateRecordLength(unsigned long size) {
  this->settingsRecordLengthLabel->setText(
      valueToString(size, UNIT_SAMPLES, 4));
}

/// \brief Export the oscilloscope screen to a file.
/// \return true if the document was exported successfully.
bool DsoWidget::exportAs() {
  QStringList filters;
  filters << tr("Portable Document Format (*.pdf)")
          << tr("Image (*.png *.xpm *.jpg)")
          << tr("Comma-Separated Values (*.csv)");

  QFileDialog fileDialog(static_cast<QWidget *>(this->parent()),
                         tr("Export file..."), QString(), filters.join(";;"));
  fileDialog.setFileMode(QFileDialog::AnyFile);
  fileDialog.setAcceptMode(QFileDialog::AcceptSave);
  if (fileDialog.exec() != QDialog::Accepted)
    return false;

  Exporter exporter(this->settings, this->dataAnalyzer,
                    static_cast<QWidget *>(this->parent()));
  exporter.setFilename(fileDialog.selectedFiles().first());
  exporter.setFormat((ExportFormat)(
      EXPORT_FORMAT_PDF + filters.indexOf(fileDialog.selectedNameFilter())));

  return exporter.doExport();
}

/// \brief Print the oscilloscope screen.
/// \return true if the document was sent to the printer successfully.
bool DsoWidget::print() {
  Exporter exporter(this->settings, this->dataAnalyzer,
                    static_cast<QWidget *>(this->parent()));
  exporter.setFormat(EXPORT_FORMAT_PRINTER);

  return exporter.doExport();
}

/// \brief Stop the oscilloscope.
void DsoWidget::updateZoom(bool enabled) {
  this->mainLayout->setRowStretch(9, enabled ? 1 : 0);
  this->zoomScope->setVisible(enabled);

  // Show time-/frequencybase and zoom factor if the magnified scope is shown
  this->markerLayout->setStretch(3, enabled ? 1 : 0);
  this->markerTimebaseLabel->setVisible(enabled);
  this->markerLayout->setStretch(4, enabled ? 1 : 0);
  this->markerFrequencybaseLabel->setVisible(enabled);
  if (enabled)
    this->updateMarkerDetails();
  else
    this->markerInfoLabel->setText(tr("Marker 1/2"));

  this->repaint();
}

/// \brief Prints analyzed data.
void DsoWidget::dataAnalyzed() {
  for (int channel = 0; channel < this->settings->scope.voltage.count();
       ++channel) {
    if (this->settings->scope.voltage[channel].used &&
        this->dataAnalyzer->data(channel)) {
      // Amplitude string representation (4 significant digits)
      this->measurementAmplitudeLabel[channel]->setText(valueToString(
          this->dataAnalyzer->data(channel)->amplitude, UNIT_VOLTS, 4));
      // Frequency string representation (5 significant digits)
      this->measurementFrequencyLabel[channel]->setText(valueToString(
          this->dataAnalyzer->data(channel)->frequency, UNIT_HERTZ, 5));
    }
  }
}

/// \brief Handles valueChanged signal from the offset sliders.
/// \param channel The channel whose offset was changed.
/// \param value The new offset for the channel.
void DsoWidget::updateOffset(int channel, double value) {
  if (channel < this->settings->scope.voltage.count()) {
    this->settings->scope.voltage[channel].offset = value;

    if (channel < (int)this->settings->scope.physicalChannels)
      this->adaptTriggerLevelSlider(channel);
  } else if (channel < this->settings->scope.voltage.count() * 2)
    this->settings->scope
        .spectrum[channel - this->settings->scope.voltage.count()]
        .offset = value;

  emit offsetChanged(channel, value);
}

/// \brief Handles valueChanged signal from the triggerPosition slider.
/// \param index The index of the slider.
/// \param value The new triggerPosition in seconds relative to the first
/// sample.
void DsoWidget::updateTriggerPosition(int index, double value) {
  if (index != 0)
    return;

  this->settings->scope.trigger.position = value;

  this->updateTriggerDetails();

  emit triggerPositionChanged(
      value * this->settings->scope.horizontal.timebase * DIVS_TIME);
}

/// \brief Handles valueChanged signal from the trigger level slider.
/// \param channel The index of the slider.
/// \param value The new trigger level.
void DsoWidget::updateTriggerLevel(int channel, double value) {
  this->settings->scope.voltage[channel].trigger = value;

  this->updateTriggerDetails();

  emit triggerLevelChanged(channel, value);
}

/// \brief Handles valueChanged signal from the marker slider.
/// \param marker The index of the slider.
/// \param value The new marker position.
void DsoWidget::updateMarker(int marker, double value) {
  this->settings->scope.horizontal.marker[marker] = value;

  this->updateMarkerDetails();

  emit markerChanged(marker, value);
}