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diff --git a/src/gui/probepositioner.h b/src/gui/probepositioner.h
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+/***************************************************************************
+ *   Copyright (C) 2005 by David Saxton                                    *
+ *   david@bluehaze.org                                                    *
+ *                                                                         *
+ *   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 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ ***************************************************************************/
+
+#ifndef PROBEPOSITIONER_H
+#define PROBEPOSITIONER_H
+
+#include <qwidget.h>
+
+class ProbeData;
+typedef QMap< int, ProbeData* > ProbeDataMap;
+
+const float probeArrowWidth = 9;
+const float probeArrowHeight = 12;
+
+/**
+Widget for positioning the output of Probes in the OscilloscopeView
+@author David Saxton
+*/
+class ProbePositioner : public QWidget
+{
+	Q_OBJECT
+	public:
+		ProbePositioner(QWidget *parent = 0, const char *name = 0);
+		~ProbePositioner();
+		/**
+		 * Returns the amount of space (height in pixels) that a probe output
+		 * takes up
+		 */
+		int probeOutputHeight() const;
+		/**
+		 * Returns the probe position (from the top) in pixels that the probe
+		 * with the given id should be displayed at, or -1 if probe with the
+		 * given id couldn't be found
+		 */
+		int probePosition( ProbeData *probeData ) const;
+		/**
+		 * Sets the probe position relative to the top of this widget (and hence
+		 * relative to the top of the oscilloscope view) in pixels
+		 */
+		void setProbePosition( ProbeData *probeData, int position );
+		/**
+		 * Returns the probe at the given position (plus or minus an an arrow),
+		 * or NULL if none. Records the offset of the position from the mouse
+		 * in m_probePosOffset.
+		 */
+		ProbeData* probeAtPosition( const QPoint &pos );
+		
+	public slots:
+		void forceRepaint();
+		
+	protected slots:
+		void slotProbeDataRegistered( int id, ProbeData *probe );
+		void slotProbeDataUnregistered( int id );
+		
+	protected:
+		virtual void mousePressEvent( QMouseEvent * e );
+		virtual void mouseReleaseEvent( QMouseEvent * e );
+		virtual void mouseMoveEvent( QMouseEvent * e );
+		virtual void paintEvent( QPaintEvent *e );
+		virtual void resizeEvent( QResizeEvent *event );
+		
+		ProbeDataMap m_probeDataMap;
+		ProbeData *p_draggedProbe;
+		int m_probePosOffset;
+		
+		bool b_needRedraw;
+		QPixmap *m_pixmap;
+};
+
+#endif