diff --git a/src/apoplastitem.cpp b/src/apoplastitem.cpp
new file mode 100644
--- /dev/null
+++ b/src/apoplastitem.cpp
@@ -0,0 +1,78 @@
+/*
+ *
+ *  $Id$
+ *
+ *  This file is part of the Virtual Leaf.
+ *
+ *  The Virtual Leaf 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.
+ *
+ *  The Virtual Leaf 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 the Virtual Leaf.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *  Copyright 2010 Roeland Merks.
+ *
+ */
+
+
+#include <string>
+#include <QGraphicsScene>
+#include "canvas.h"
+#include "parameter.h"
+#include "node.h"
+#include "apoplastitem.h"
+
+static const std::string _module_id("$Id$");
+
+ApoplastItem::ApoplastItem( Wall *w, QGraphicsScene *canvas )
+: QGraphicsLineItem( 0, canvas ), SimItemBase( w, canvas){
+		
+	extern Parameter par;
+	
+	setColor();
+	
+	// line with "PIN1"is a bit inside the cell wall
+	Vector edgevec = (*(w->N2())) - (*(w->N1()));
+	Vector perp = edgevec.Normalised().Perp2D();
+	
+	Vector offs = Cell::Offset();
+	double factor = Cell::Factor();
+	
+	Vector from = ( offs + *(w->N1()) ) * factor;// + (wn==1?-1:1) * par.outlinewidth;// * 0.2 * factor * perp;
+	Vector to = ( offs + *(w->N2()) ) *factor;// + (wn==1?-1:1) * par.outlinewidth;// * 0.2 * factor * perp;
+	
+	
+	setLine(( from.x ),
+			( from.y ),
+			( to.x ),
+			( to.y ) );
+	setZValue(12);
+}
+
+
+void ApoplastItem::setColor(void) {
+	
+	QColor diffcolor;
+	static const QColor purple("Purple");
+	static const QColor blue("blue");
+	
+	Wall *w=&getWall();
+	double val = w->getApoplast(2);
+
+	diffcolor.setRgb( 0,0,(int)( ( val / (1 + val) )*255.));
+	setPen (QPen(diffcolor, 20) );
+
+}
+
+void ApoplastItem::OnClick(QMouseEvent *e) {
+	
+	
+}
+