diff --git a/scalepicker.h b/scalepicker.h
new file mode 100644
--- /dev/null
+++ b/scalepicker.h
@@ -0,0 +1,47 @@
+/*
+  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/>.
+*/
+
+#ifndef SCALEPICKER_H
+#define SCALEPICKER_H
+
+#include <QObject>
+#include <QMouseEvent>
+#include <qwt_scale_widget.h>
+
+class ScalePicker : public QObject
+{
+    Q_OBJECT
+public:
+    ScalePicker(QwtScaleWidget* scaleWidget);
+    virtual bool eventFilter(QObject*, QEvent*);
+
+signals:
+    void pickStarted(double pos);
+    void picking(double firstPos, double lastPos);
+    void picked(double firstPos, double lastPos);
+
+private:
+    QwtScaleWidget* _scaleWidget;
+    double position(QMouseEvent*); // returns the mouse position relative to plot coordinates
+
+    bool started;
+    double firstPos;
+};
+
+#endif // SCALEPICKER_H