diff --git a/src/transporterdialog.cpp b/src/transporterdialog.cpp
new file mode 100644
--- /dev/null
+++ b/src/transporterdialog.cpp
@@ -0,0 +1,106 @@
+/*
+ *
+ *  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 <QtGui>
+#include <QDoubleValidator>
+#include <sstream>
+#include "canvas.h"
+#include "transporterdialog.h"
+
+static const std::string _module_id("$Id$");
+
+TransporterDialog::TransporterDialog(Wall *w, CellBase *c, int wn, QWidget *parent)
+  : wall(w), cell(c), wall_num(wn), QDialog(parent)
+{
+  int frameStyle = QFrame::Plain | QFrame::NoFrame;
+  QPushButton *ok = new QPushButton(tr("Ok"));
+  QPushButton *cancel = new QPushButton(tr("Cancel"));
+  QGridLayout *t_grid = new QGridLayout; // transporter grid
+
+  // connect the slots
+  connect(ok, SIGNAL(clicked()), this, SLOT(setTransporterValues()));
+  connect(cancel, SIGNAL(clicked()), this, SLOT(close()));
+
+  // compose a label for the dialog box
+  std::stringstream label_text; 
+  label_text << "C("<< wall->C1()->Index() << "," << wall->C2()->Index() << "), N(" << wall->N1()->Index() << "," << wall->N2()->Index() << ")";
+	
+  // retrieve the current transporters
+  QVector <double> transporters;  // transporter vector
+  ntransporters = cell->NChem(); // size of transporter vector
+  for (int i=0; i<ntransporters; ++i){
+    transporters << ((wall_num == 1) ? wall->Transporters1(i) : wall->Transporters2(i)); // dependent on the wall number of course.
+  }
+
+  // iterate over the vector of transporter values making a label/edit line for each
+  for (int i=0; i<transporters.size(); ++i) {
+
+    // label
+    label = new QLabel;
+    label->setFrameStyle(frameStyle);
+    label->setText(QString("%1").arg(i+1)); // cardinal numbering
+
+    // line editor
+    QLineEdit *editor = new QLineEdit();
+    editors << editor;
+    editor->setValidator(new QDoubleValidator(editor)); // validator settings
+
+    // assign the current transporter value
+    QString n;
+    editor->setText(n.setNum(transporters[i]));
+
+    // insert the label and editor into the transporter grid
+    t_grid->addWidget(label, i, 0);
+    t_grid->addWidget(editor, i, 1);
+  }
+
+  // add OK and Cancel buttons
+  QGridLayout *b_grid = new QGridLayout; // button grid
+  b_grid->addWidget(ok, 0, 0);
+  b_grid->addWidget(cancel, 0, 1);
+
+  // add both transporter and button grids to the box layout widget
+  QVBoxLayout *layout = new QVBoxLayout;
+  layout->addLayout(t_grid);
+  layout->addLayout(b_grid);
+  setLayout(layout);
+
+  setWindowTitle(tr(label_text.str().c_str()));
+}
+
+void TransporterDialog::setTransporterValues(){
+
+  // iterate over the editor widgets soliciting their values and setting the wall's transporters accordingly.
+  for (int i=0; i<ntransporters; ++i){
+    #ifdef QDEBUG  
+    qDebug() << "Transporter(" << i << "): " << editors[i]->text().toDouble() << endl;
+    #endif
+    if (wall_num == 1)
+      wall->setTransporters1(i, editors[i]->text().toDouble());
+    else 
+      wall->setTransporters2(i, editors[i]->text().toDouble());
+  }
+  editors.resize(0);
+  close();
+}
+
+// finis
+