diff --git a/scalezoomer.cpp b/scalezoomer.cpp
new file mode 100644
--- /dev/null
+++ b/scalezoomer.cpp
@@ -0,0 +1,77 @@
+/*
+  Copyright © 2015 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 <QRectF>
+
+#include "scalezoomer.h"
+
+ScaleZoomer::ScaleZoomer(QwtPlot* plot, QwtPlotZoomer* zoomer) :
+    QObject(plot),
+    bottomPicker(plot->axisWidget(QwtPlot::xBottom), plot->canvas()),
+    leftPicker(plot->axisWidget(QwtPlot::yLeft), plot->canvas())
+{
+    _plot = plot;
+    _zoomer = zoomer;
+    connect(&bottomPicker, &ScalePicker::picked, this, &ScaleZoomer::bottomPicked);
+    connect(&leftPicker, &ScalePicker::picked, this, &ScaleZoomer::leftPicked);
+}
+
+void ScaleZoomer::setPickerPen(QPen pen)
+{
+    bottomPicker.setPen(pen);
+    leftPicker.setPen(pen);
+}
+
+void ScaleZoomer::bottomPicked(double firstPos, double lastPos)
+{
+    QRectF zRect;
+    if (lastPos > firstPos)
+    {
+        zRect.setLeft(firstPos);
+        zRect.setRight(lastPos);
+    }
+    else
+    {
+        zRect.setLeft(lastPos);
+        zRect.setRight(firstPos);
+    }
+
+    zRect.setBottom(_plot->axisScaleDiv(QwtPlot::yLeft).lowerBound());
+    zRect.setTop(_plot->axisScaleDiv(QwtPlot::yLeft).upperBound());
+    _zoomer->zoom(zRect);
+}
+
+void ScaleZoomer::leftPicked(double firstPos, double lastPos)
+{
+    QRectF zRect;
+    if (lastPos > firstPos)
+    {
+        zRect.setBottom(firstPos);
+        zRect.setTop(lastPos);
+    }
+    else
+    {
+        zRect.setBottom(lastPos);
+        zRect.setTop(firstPos);
+    }
+
+    zRect.setLeft(_plot->axisScaleDiv(QwtPlot::xBottom).lowerBound());
+    zRect.setRight(_plot->axisScaleDiv(QwtPlot::xBottom).upperBound());
+    _zoomer->zoom(zRect);
+}