diff --git a/src/mainwindow.h b/src/mainwindow.h
--- a/src/mainwindow.h
+++ b/src/mainwindow.h
@@ -1,5 +1,5 @@
 /*
-  Copyright © 2017 Hasan Yavuz Özderya
+  Copyright © 2018 Hasan Yavuz Özderya
 
   This file is part of serialplot.
 
@@ -40,8 +40,7 @@
 #include "plotcontrolpanel.h"
 #include "recordpanel.h"
 #include "ui_about_dialog.h"
-#include "framebuffer.h"
-#include "channelmanager.h"
+#include "stream.h"
 #include "snapshotmanager.h"
 #include "plotmanager.h"
 #include "plotmenu.h"
@@ -77,7 +76,8 @@ private:
     unsigned int numOfSamples;
 
     QList<QwtPlotCurve*> curves;
-    ChannelManager channelMan;
+    // ChannelManager channelMan;
+    Stream stream;
     PlotManager* plotMan;
     QWidget* secondaryPlot;
     SnapshotManager snapshotMan;
@@ -114,7 +114,6 @@ private slots:
     void onPortToggled(bool open);
 
     void onNumOfSamplesChanged(int value);
-    void onNumOfChannelsChanged(unsigned value);
 
     void clearPlot();
     void onSpsChanged(unsigned sps);