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diff --git a/dwr/box.cc b/dwr/box.cc
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+/*
+ * RTFL
+ *
+ * Copyright 2013-2015 Sebastian Geerken <sgeerken@dillo.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 3 of the License, or
+ * (at your option) any later version; with the following exception:
+ *
+ * The copyright holders of RTFL give you permission to link this file
+ * statically or dynamically against all versions of the graphviz
+ * library, which are published by AT&T Corp. under one of the following
+ * licenses:
+ *
+ * - Common Public License version 1.0 as published by International
+ *   Business Machines Corporation (IBM), or
+ * - Eclipse Public License version 1.0 as published by the Eclipse
+ *   Foundation.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <math.h>
+
+#include "box.hh"
+
+using namespace dw::core;
+using namespace dw::core::style;
+using namespace lout::container::typed;
+using namespace lout::misc;
+
+namespace rtfl {
+
+namespace dw {
+
+int Box::CLASS_ID = -1;
+
+#define LT(n) n, n, n, n, n, n, n, n, n, n, n, n, n, n, n, n
+
+const char Box::countZeroTable[256] =  {
+   8, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4,
+   LT(3), LT(2), LT(2), LT(1), LT(1), LT(1), LT(1),
+   LT(0), LT(0), LT(0), LT(0), LT(0), LT(0), LT(0), LT(0)
+};
+
+// ----------------------------------------------------------------------
+
+Box::BoxIterator::BoxIterator (Box *box, Content::Type mask,
+                                     bool atEnd) : Iterator (box, mask, atEnd)
+{
+   index = atEnd ? box->children->size() : -1;
+   content.type = atEnd ? Content::END : Content::START;
+}
+
+Box::BoxIterator::BoxIterator (Box *box, Content::Type mask,
+                                     int index) : Iterator (box, mask, false)
+{
+   this->index = index;
+
+   if (index < 0)
+      content.type = Content::START;
+   else if (index >= box->children->size ())
+      content.type = Content::END;
+   else {
+      content.type = Content::WIDGET_IN_FLOW;
+      content.widget = box->children->get (index);
+   }
+}
+
+lout::object::Object *Box::BoxIterator::clone ()
+{
+   return new BoxIterator ((Box*)getWidget(), getMask(), index);
+}
+
+int Box::BoxIterator::compareTo (lout::object::Comparable *other)
+{
+   return index - ((BoxIterator*)other)->index;
+}
+
+bool Box::BoxIterator::next ()
+{
+   Box *box = (Box*)getWidget();
+
+   if (content.type == Content::END)
+      return false;
+
+   // boxs only contain widgets:
+   if ((getMask() & Content::WIDGET_IN_FLOW) == 0) {
+      content.type = Content::END;
+      return false;
+   }
+
+   index++;
+   if (index >= box->children->size ()) {
+      content.type = Content::END;
+      return false;
+   } else {
+      content.type = Content::WIDGET_IN_FLOW;
+      content.widget = box->children->get (index);
+      return true;
+   }
+}
+
+bool Box::BoxIterator::prev ()
+{
+   Box *box = (Box*)getWidget();
+
+   if (content.type == Content::START)
+      return false;
+
+   // boxs only contain widgets:
+   if ((getMask() & Content::WIDGET_IN_FLOW) == 0) {
+      content.type = Content::START;
+      return false;
+   }
+
+   index--;
+   if (index < 0) {
+      content.type = Content::START;
+      return false;
+   } else {
+      content.type = Content::WIDGET_IN_FLOW;
+      content.widget = box->children->get (index);
+      return true;
+   }
+}
+
+void Box::BoxIterator::highlight (int start, int end, HighlightLayer layer)
+{
+   /** todo Needs this an implementation? */
+}
+
+void Box::BoxIterator::unhighlight (int direction, HighlightLayer layer)
+{
+   /** todo Needs this an implementation? */
+}
+
+void Box::BoxIterator::getAllocation (int start, int end,
+                                          Allocation *allocation)
+{
+   /** \bug Not implemented. */
+}
+
+// ----------------------------------------------------------------------
+
+Box::Box (bool stretchChildren)
+{
+   DBG_OBJ_CREATE ("rtfl::dw::Box");
+   registerName ("rtfl::dw::Box", &CLASS_ID);
+
+   this->stretchChildren = stretchChildren;
+   children = new Vector<Widget> (4, true);
+   inDestructor = false;
+}
+
+Box::~Box ()
+{
+   inDestructor = true;
+   delete children;
+
+   DBG_OBJ_DELETE ();
+}
+
+void Box::sizeRequestImplImpl (Requisition *requisition)
+{
+   actualSizeRequestImplImpl (requisition, 0);
+}
+
+void Box::actualSizeRequestImplImpl (::dw::core::Requisition *requisition,
+                                     int data1)
+{
+   // "data1" is a value passed from a special implementation of
+   // sizeRequestImplImpl to accumulateSize. See VBox for an example
+   // on usage. Extend by "data2" ... when needed.
+
+   requisition->width = requisition->ascent = requisition->descent = 0;
+
+   for (int i = 0; i < children->size (); i++) {
+      Requisition childReq;
+      children->get(i)->sizeRequest (&childReq);
+      accumulateSize (i, children->size (), requisition, &childReq, data1);
+   }      
+
+   requisition->width += getStyle()->boxDiffWidth ();
+   requisition->ascent += getStyle()->boxOffsetY ();
+   requisition->descent += getStyle()->boxRestHeight ();
+}
+
+void Box::getExtremesImplImpl (Extremes *extremes)
+{
+   extremes->minWidth = extremes->maxWidth = 0;
+
+   for (int i = 0; i < children->size (); i++) {
+      Extremes childExtr;
+      children->get(i)->getExtremes (&childExtr);
+      accumulateExtremes (i, children->size (), extremes, &childExtr);
+   }      
+
+   extremes->minWidth += getStyle()->boxDiffWidth ();
+   extremes->maxWidth += getStyle()->boxDiffWidth ();
+}
+
+void Box::drawImpl (View *view, Rectangle *area)
+{
+   DBG_OBJ_ENTER ("draw", 0, "draw", "%d, %d, %d * %d",
+                  area->x, area->y, area->width, area->height);
+
+   drawWidgetBox (view, area, false);
+   for (int i = 0; i < children->size (); i++) {
+      Widget *child = children->get (i);
+      Rectangle childArea;
+      if (child->intersects (area, &childArea))
+         child->draw (view, &childArea);
+   }
+
+   DBG_OBJ_LEAVE ();
+}
+
+::dw::core::Iterator *Box::iterator (Content::Type mask, bool atEnd)
+{
+   return new BoxIterator (this, mask, atEnd);
+}
+
+void Box::removeChild (Widget *child)
+{
+   if (!inDestructor) {
+      for (int i = 0; i < children->size (); i++) {
+         if (children->get (i) == child) {
+            children->remove (i);
+            return;
+         }
+      }
+
+      assertNotReached ();
+   }
+}
+
+void Box::addChild (Widget *widget, int newPos)
+{
+   if (newPos == -1)
+      children->put (widget);
+   else
+      children->insert (widget, newPos);
+
+   widget->setParent (this);
+   queueResize (0, true);
+}
+
+} // namespace rtfl
+
+} // namespace dw