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diff --git a/src2/fr/orsay/lri/varna/controlers/ControleurDraggedMolette.java b/src2/fr/orsay/lri/varna/controlers/ControleurDraggedMolette.java
new file mode 100644
index 0000000..8668faa
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+++ b/src2/fr/orsay/lri/varna/controlers/ControleurDraggedMolette.java
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+/*
+ VARNA is a tool for the automated drawing, visualization and annotation of the secondary structure of RNA, designed as a companion software for web servers and databases.
+ Copyright (C) 2008  Kevin Darty, Alain Denise and Yann Ponty.
+ electronic mail : Yann.Ponty@lri.fr
+ paper mail : LRI, bat 490 Université Paris-Sud 91405 Orsay Cedex France
+
+ This file is part of VARNA version 3.1.
+ VARNA version 3.1 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.
+
+ VARNA version 3.1 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 VARNA version 3.1.
+ If not, see http://www.gnu.org/licenses.
+ */
+package fr.orsay.lri.varna.controlers;
+
+import java.awt.Point;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseListener;
+import java.awt.event.MouseMotionListener;
+
+import fr.orsay.lri.varna.VARNAPanel;
+
+
+/**
+ * Controller of the mouse for scroll wheel click and dragged events
+ * 
+ * @author darty
+ * 
+ */
+public class ControleurDraggedMolette implements MouseListener,
+		MouseMotionListener {
+	private VARNAPanel _vp;
+	/**
+	 * <code>true</code> if the right button is pressed<br>
+	 * <code>false</code> if not
+	 */
+	private static Boolean _rightButtonClick;
+	/**
+	 * The vector which contains the direction of the mouse movement
+	 */
+	private static Point _direction;
+	/**
+	 * The position of the cursor before the mouse drag
+	 */
+	private static Point _avant;
+	/**
+	 * The position of the cursor after the mouse drag
+	 */
+	private static Point _apres;
+
+	public ControleurDraggedMolette(VARNAPanel vp) {
+		_vp = vp;
+		_rightButtonClick = false;
+		_avant = _apres = _direction = new Point();
+	}
+
+	public void mouseDragged(MouseEvent e) {
+		// si le bon boutton a été pressé
+		if (_rightButtonClick) {
+			_apres = e.getPoint();
+			_direction = new Point(_apres.x - _avant.x, _apres.y - _avant.y);
+			_vp.setTranslation(new Point(_vp.getTranslation().x + _direction.x,
+					_vp.getTranslation().y + _direction.y));
+			_avant = _apres;
+			_vp.checkTranslation();
+			_vp.repaint();
+		}
+	}
+
+	public void mouseMoved(MouseEvent e) {
+	}
+
+	public void mouseClicked(MouseEvent e) {
+	}
+
+	public void mouseEntered(MouseEvent e) {
+	}
+
+	public void mouseExited(MouseEvent e) {
+	}
+
+	public void mousePressed(MouseEvent e) {
+		// lors du clic, la position du curseur est enregistrée
+		_avant = e.getPoint();
+		// si le boutton molette est pressé ou si le boutton gauche et shift
+		// sont pressés
+		if (e.getButton() == MouseEvent.BUTTON2)
+		{
+			_rightButtonClick = true;
+		}
+		else
+		{
+			_rightButtonClick = false;
+		}
+			
+			
+	}
+
+	public void mouseReleased(MouseEvent e) {
+		// si le boutton molette est relaché ou si le boutton gauche et shift
+		// sont relachés
+		if (e.getButton() == MouseEvent.BUTTON2)
+			_rightButtonClick = false;
+	}
+}