diff --git a/src/channelmanager.cpp b/src/channelmanager.cpp
deleted file mode 100644
--- a/src/channelmanager.cpp
+++ /dev/null
@@ -1,183 +0,0 @@
-/*
-  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/>.
-*/
-
-#include <QModelIndex>
-
-#include <QtDebug>
-
-#include "channelmanager.h"
-#include "setting_defines.h"
-
-ChannelManager::ChannelManager(unsigned numberOfChannels, unsigned numberOfSamples, QObject *parent) :
-    QObject(parent),
-    _infoModel(numberOfChannels)
-{
-    _numOfChannels = numberOfChannels;
-    _numOfSamples = numberOfSamples;
-    _paused = false;
-
-    for (unsigned int i = 0; i < numberOfChannels; i++)
-    {
-        channelBuffers.append(new FrameBuffer(numberOfSamples));
-    }
-
-    connect(&_infoModel, &ChannelInfoModel::dataChanged,
-            this, &ChannelManager::onChannelInfoChanged);
-}
-
-ChannelManager::~ChannelManager()
-{
-    for (auto buffer : channelBuffers)
-    {
-        delete buffer;
-    }
-}
-
-unsigned ChannelManager::numOfChannels()
-{
-    return channelBuffers.size();
-}
-
-unsigned ChannelManager::numOfSamples()
-{
-    return _numOfSamples;
-}
-
-void ChannelManager::setNumOfChannels(unsigned number)
-{
-    unsigned int oldNum = channelBuffers.size();
-
-    if (number > oldNum)
-    {
-        // add new channels
-        for (unsigned int i = 0; i < number - oldNum; i++)
-        {
-            channelBuffers.append(new FrameBuffer(_numOfSamples));
-        }
-    }
-    else if(number < oldNum)
-    {
-        // remove channels
-        for (unsigned int i = oldNum-1; i > number-1; i--)
-        {
-            delete channelBuffers.takeLast();
-        }
-    }
-
-    _numOfChannels = number;
-    _infoModel.setNumOfChannels(number);
-
-    emit numOfChannelsChanged(number);
-}
-
-void ChannelManager::setNumOfSamples(unsigned number)
-{
-    _numOfSamples = number;
-
-    for (int ci = 0; ci < channelBuffers.size(); ci++)
-    {
-        channelBuffers[ci]->resize(_numOfSamples);
-    }
-
-    emit numOfSamplesChanged(number);
-}
-
-void ChannelManager::pause(bool paused)
-{
-    _paused = paused;
-}
-
-FrameBuffer* ChannelManager::channelBuffer(unsigned channel)
-{
-    return channelBuffers[channel];
-}
-
-ChannelInfoModel* ChannelManager::infoModel()
-{
-    return &_infoModel;
-}
-
-QString ChannelManager::channelName(unsigned channel)
-{
-    return _infoModel.data(_infoModel.index(channel, ChannelInfoModel::COLUMN_NAME),
-                           Qt::DisplayRole).toString();
-}
-
-void ChannelManager::onChannelInfoChanged(const QModelIndex & topLeft,
-                                          const QModelIndex & bottomRight,
-                                          const QVector<int> & roles)
-{
-    int start = topLeft.row();
-    int end = bottomRight.row();
-    int col = topLeft.column();
-
-    for (int ci = start; ci <= end; ci++)
-    {
-        for (auto role : roles)
-        {
-            switch (role)
-            {
-                case Qt::EditRole:
-                    if (col == ChannelInfoModel::COLUMN_NAME)
-                    {
-                        emit channelNameChanged(ci, channelName(ci));
-                    }
-                    break;
-                case Qt::ForegroundRole:
-                    if (col == ChannelInfoModel::COLUMN_NAME)
-                    {
-                        // TODO: emit channel color changed
-                    }
-                    break;
-                case Qt::CheckStateRole:
-                    if (col == ChannelInfoModel::COLUMN_VISIBILITY)
-                    {
-                        // TODO: emit visibility
-                    }
-                    break;
-            }
-        }
-        // emit channelNameChanged(i, channelName(i));
-    }
-}
-
-void ChannelManager::addData(double* data, unsigned size)
-{
-    Q_ASSERT(size % _numOfChannels == 0);
-
-    if (_paused) return;
-
-    int n = size / _numOfChannels;
-    for (unsigned ci = 0; ci < _numOfChannels; ci++)
-    {
-        channelBuffers[ci]->addSamples(&data[ci*n], n);
-    }
-
-    emit dataAdded();
-}
-
-void ChannelManager::saveSettings(QSettings* settings)
-{
-    _infoModel.saveSettings(settings);
-}
-
-void ChannelManager::loadSettings(QSettings* settings)
-{
-    _infoModel.loadSettings(settings);
-}
diff --git a/src/channelmanager.h b/src/channelmanager.h
deleted file mode 100644
--- a/src/channelmanager.h
+++ /dev/null
@@ -1,89 +0,0 @@
-/*
-  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 CHANNELMANAGER_H
-#define CHANNELMANAGER_H
-
-#include <QObject>
-#include <QStringList>
-#include <QModelIndex>
-#include <QVector>
-#include <QSettings>
-
-#include "framebuffer.h"
-#include "channelinfomodel.h"
-
-class ChannelManager : public QObject
-{
-    Q_OBJECT
-public:
-    explicit ChannelManager(unsigned numberOfChannels, unsigned numberOfSamples, QObject *parent = 0);
-    ~ChannelManager();
-
-    unsigned numOfChannels();
-    unsigned numOfSamples();
-    FrameBuffer* channelBuffer(unsigned channel);
-    QString channelName(unsigned channel);
-    /// Stores channel names into a `QSettings`
-    void saveSettings(QSettings* settings);
-    /// Loads channel names from a `QSettings`.
-    void loadSettings(QSettings* settings);
-    /// Returns a model that manages channel information (name, color etc)
-    ChannelInfoModel* infoModel();
-
-signals:
-    void numOfChannelsChanged(unsigned value);
-    void numOfSamplesChanged(unsigned value);
-    void channelNameChanged(unsigned channel, QString name);
-    void dataAdded(); ///< emitted when data added to channel man.
-
-public slots:
-    void setNumOfChannels(unsigned number);
-    void setNumOfSamples(unsigned number);
-    /**
-     * Add data for all channels.
-     *
-     * All channels data is provided in a single array which contains equal
-     * number of samples for all channels. Structure is as shown below:
-     *
-     * [CH0_SMP0, CH0_SMP1 ... CH0_SMPN, CH1_SMP0, CH1_SMP1, ... , CHN_SMPN]
-     *
-     * @param data samples for all channels
-     * @param size size of `data`, must be multiple of `numOfChannels`
-     */
-    void addData(double* data, unsigned size);
-
-    /// When paused `addData` does nothing.
-    void pause(bool paused);
-
-private:
-    unsigned _numOfChannels;
-    unsigned _numOfSamples;
-    bool _paused;
-    QList<FrameBuffer*> channelBuffers;
-    // QStringListModel _channelNames;
-    ChannelInfoModel _infoModel;
-
-private slots:
-    void onChannelInfoChanged(const QModelIndex & topLeft,
-                              const QModelIndex & bottomRight,
-                              const QVector<int> & roles = QVector<int> ());
-};
-
-#endif // CHANNELMANAGER_H
diff --git a/src/framebuffer.cpp b/src/framebuffer.cpp
deleted file mode 100644
--- a/src/framebuffer.cpp
+++ /dev/null
@@ -1,165 +0,0 @@
-/*
-  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/>.
-*/
-
-#include "framebuffer.h"
-
-FrameBuffer::FrameBuffer(size_t size)
-{
-    _size = size;
-    data = new double[_size]();
-    headIndex = 0;
-
-    brInvalid = false;
-    _brCache.setCoords(0, 0, size, 0);
-}
-
-FrameBuffer::~FrameBuffer()
-{
-    delete[] data;
-}
-
-void FrameBuffer::resize(size_t size)
-{
-    int offset = size - _size;
-    if (offset == 0) return;
-
-    double* newData = new double[size];
-
-    // move data to new array
-    int fill_start = offset > 0 ? offset : 0;
-
-    for (int i = fill_start; i < int(size); i++)
-    {
-        newData[i] = sample(i - offset);
-    }
-
-    // fill the beginning of the new data
-    if (fill_start > 0)
-    {
-        for (int i = 0; i < fill_start; i++)
-        {
-            newData[i] = 0;
-        }
-    }
-
-    // data is ready, clean and re-point
-    delete data;
-    data = newData;
-    headIndex = 0;
-    _size = size;
-
-    // invalidate bounding rectangle
-    brInvalid = true;
-}
-
-void FrameBuffer::addSamples(double* samples, size_t size)
-{
-    unsigned shift = size;
-    if (shift < _size)
-    {
-        unsigned x = _size - headIndex; // distance of `head` to end
-
-        if (shift <= x) // there is enough room at the end of array
-        {
-            for (size_t i = 0; i < shift; i++)
-            {
-                data[i+headIndex] = samples[i];
-            }
-
-            if (shift == x) // we used all the room at the end
-            {
-                headIndex = 0;
-            }
-            else
-            {
-                headIndex += shift;
-            }
-        }
-        else // there isn't enough room
-        {
-            for (size_t i = 0; i < x; i++) // fill the end part
-            {
-                data[i+headIndex] = samples[i];
-            }
-            for (size_t i = 0; i < (shift-x); i++) // continue from the beginning
-            {
-                data[i] = samples[i+x];
-            }
-            headIndex = shift-x;
-        }
-    }
-    else // number of new samples equal or bigger than current size
-    {
-        int x = shift - _size;
-        for (size_t i = 0; i < _size; i++)
-        {
-            data[i] = samples[i+x];
-        }
-        headIndex = 0;
-    }
-
-    // invalidate cache
-    brInvalid = true;
-}
-
-void FrameBuffer::clear()
-{
-    for (size_t i=0; i < _size; i++) data[i] = 0.;
-
-    _brCache.setCoords(0, 0, _size, 0);
-}
-
-size_t FrameBuffer::size() const
-{
-    return _size;
-}
-
-QRectF FrameBuffer::boundingRect() const
-{
-    if (brInvalid) updateBoundingRect();
-    return _brCache;
-}
-
-void FrameBuffer::updateBoundingRect() const
-{
-    double minValue = data[0];
-    double maxValue = data[0];
-    for (size_t i = 0; i < _size; i++)
-    {
-        if (data[i] > maxValue)
-        {
-            maxValue = data[i];
-        }
-        else if (data[i] < minValue)
-        {
-            minValue = data[i];
-        }
-    }
-    _brCache.setTop(minValue);
-    _brCache.setBottom(maxValue);
-
-    brInvalid = false;
-}
-
-double FrameBuffer::sample(size_t i) const
-{
-    size_t index = headIndex + i;
-    if (index >= _size) index -= _size;
-    return data[index];
-}
diff --git a/src/framebuffer.h b/src/framebuffer.h
deleted file mode 100644
--- a/src/framebuffer.h
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
-  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 FRAMEBUFFER_H
-#define FRAMEBUFFER_H
-
-#include <QPointF>
-#include <QRectF>
-
-class FrameBuffer
-{
-public:
-    FrameBuffer(size_t size);
-    ~FrameBuffer();
-
-    void resize(size_t size);
-    void addSamples(double* samples, size_t size);
-    void clear(); // fill 0
-
-    // QwtSeriesData related implementations
-    size_t size() const;
-    QRectF boundingRect() const;
-    double sample(size_t i) const;
-
-private:
-    size_t _size; // size of `data`
-    double* data;
-    size_t headIndex; // indicates the actual `0` index of the ring buffer
-
-    mutable bool brInvalid; ///< Indicates that bounding rectangle needs to be re-calculated
-    mutable QRectF _brCache; ///< Cache for boundingRect()
-    void updateBoundingRect() const; ///< Updates bounding rectangle cache
-};
-
-#endif // FRAMEBUFFER_H