adding initial project layout

10 files changed, 2337 insertions, 0 deletions

diff --git a/externals/qhexedit/CMakeLists.txt b/externals/qhexedit/CMakeLists.txt
new file mode 100644
index 00000000..cfe168ef
--- /dev/null
+++ b/externals/qhexedit/CMakeLists.txt
@@ -0,0 +1,13 @@
+set(SRCS
+            commands.cpp
+            qhexedit.cpp
+            qhexedit_p.cpp
+            xbytearray.cpp)
+
+qt4_wrap_cpp(MOC_SRCS
+                        qhexedit.h
+                        qhexedit_p.h)
+
+include_directories(${CMAKE_CURRENT_BINARY_DIR})
+
+add_library(qhexedit STATIC ${SRCS} ${MOC_SRCS})
diff --git a/externals/qhexedit/commands.cpp b/externals/qhexedit/commands.cpp
new file mode 100644
index 00000000..303091d1
--- /dev/null
+++ b/externals/qhexedit/commands.cpp
@@ -0,0 +1,115 @@
+#include "commands.h"
+
+CharCommand::CharCommand(XByteArray * xData, Cmd cmd, int charPos, char newChar, QUndoCommand *parent)
+    : QUndoCommand(parent)
+{
+    _xData = xData;
+    _charPos = charPos;
+    _newChar = newChar;
+    _cmd = cmd;
+}
+
+bool CharCommand::mergeWith(const QUndoCommand *command)
+{
+    const CharCommand *nextCommand = static_cast<const CharCommand *>(command);
+    bool result = false;
+
+    if (_cmd != remove)
+    {
+        if (nextCommand->_cmd == replace)
+            if (nextCommand->_charPos == _charPos)
+            {
+                _newChar = nextCommand->_newChar;
+                result = true;
+            }
+    }
+    return result;
+}
+
+void CharCommand::undo()
+{
+    switch (_cmd)
+    {
+        case insert:
+            _xData->remove(_charPos, 1);
+            break;
+        case replace:
+            _xData->replace(_charPos, _oldChar);
+            _xData->setDataChanged(_charPos, _wasChanged);
+            break;
+        case remove:
+            _xData->insert(_charPos, _oldChar);
+            _xData->setDataChanged(_charPos, _wasChanged);
+            break;
+    }
+}
+
+void CharCommand::redo()
+{
+    switch (_cmd)
+    {
+        case insert:
+            _xData->insert(_charPos, _newChar);
+            break;
+        case replace:
+            _oldChar = _xData->data()[_charPos];
+            _wasChanged = _xData->dataChanged(_charPos);
+            _xData->replace(_charPos, _newChar);
+            break;
+        case remove:
+            _oldChar = _xData->data()[_charPos];
+            _wasChanged = _xData->dataChanged(_charPos);
+            _xData->remove(_charPos, 1);
+            break;
+    }
+}
+
+
+
+ArrayCommand::ArrayCommand(XByteArray * xData, Cmd cmd, int baPos, QByteArray newBa, int len, QUndoCommand *parent)
+    : QUndoCommand(parent)
+{
+    _cmd = cmd;
+    _xData = xData;
+    _baPos = baPos;
+    _newBa = newBa;
+    _len = len;
+}
+
+void ArrayCommand::undo()
+{
+    switch (_cmd)
+    {
+        case insert:
+            _xData->remove(_baPos, _newBa.length());
+            break;
+        case replace:
+            _xData->replace(_baPos, _oldBa);
+            _xData->setDataChanged(_baPos, _wasChanged);
+            break;
+        case remove:
+            _xData->insert(_baPos, _oldBa);
+            _xData->setDataChanged(_baPos, _wasChanged);
+            break;
+    }
+}
+
+void ArrayCommand::redo()
+{
+    switch (_cmd)
+    {
+        case insert:
+            _xData->insert(_baPos, _newBa);
+            break;
+        case replace:
+            _oldBa = _xData->data().mid(_baPos, _len);
+            _wasChanged = _xData->dataChanged(_baPos, _len);
+            _xData->replace(_baPos, _newBa);
+            break;
+        case remove:
+            _oldBa = _xData->data().mid(_baPos, _len);
+            _wasChanged = _xData->dataChanged(_baPos, _len);
+            _xData->remove(_baPos, _len);
+            break;
+    }
+}
diff --git a/externals/qhexedit/commands.h b/externals/qhexedit/commands.h
new file mode 100644
index 00000000..9931b3fb
--- /dev/null
+++ b/externals/qhexedit/commands.h
@@ -0,0 +1,70 @@
+#ifndef COMMANDS_H
+#define COMMANDS_H
+
+/** \cond docNever */
+
+#include <QUndoCommand>
+
+#include "xbytearray.h"
+
+/*! CharCommand is a class to prived undo/redo functionality in QHexEdit.
+A QUndoCommand represents a single editing action on a document. CharCommand
+is responsable for manipulations on single chars. It can insert. replace and
+remove characters. A manipulation stores allways to actions
+1. redo (or do) action
+2. undo action.
+
+CharCommand also supports command compression via mergeWidht(). This allows
+the user to execute a undo command contation e.g. 3 steps in a single command.
+If you for example insert a new byt "34" this means for the editor doing 3
+steps: insert a "00", replace it with "03" and the replace it with "34". These
+3 steps are combined into a single step, insert a "34".
+*/
+class CharCommand : public QUndoCommand
+{
+public:
+    enum { Id = 1234 };
+    enum Cmd {insert, remove, replace};
+
+    CharCommand(XByteArray * xData, Cmd cmd, int charPos, char newChar,
+                       QUndoCommand *parent=0);
+
+    void undo();
+    void redo();
+    bool mergeWith(const QUndoCommand *command);
+    int id() const { return Id; }
+
+private:
+    XByteArray * _xData;
+    int _charPos;
+    bool _wasChanged;
+    char _newChar;
+    char _oldChar;
+    Cmd _cmd;
+};
+
+/*! ArrayCommand provides undo/redo functionality for handling binary strings. It
+can undo/redo insert, replace and remove binary strins (QByteArrays).
+*/
+class ArrayCommand : public QUndoCommand
+{
+public:
+    enum Cmd {insert, remove, replace};
+    ArrayCommand(XByteArray * xData, Cmd cmd, int baPos, QByteArray newBa=QByteArray(), int len=0,
+                 QUndoCommand *parent=0);
+    void undo();
+    void redo();
+
+private:
+    Cmd _cmd;
+    XByteArray * _xData;
+    int _baPos;
+    int _len;
+    QByteArray _wasChanged;
+    QByteArray _newBa;
+    QByteArray _oldBa;
+};
+
+/** \endcond docNever */
+
+#endif // COMMANDS_H
diff --git a/externals/qhexedit/license.txt b/externals/qhexedit/license.txt
new file mode 100644
index 00000000..f166cc57
--- /dev/null
+++ b/externals/qhexedit/license.txt
@@ -0,0 +1,502 @@
+                  GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL.  It also counts
+ as the successor of the GNU Library Public License, version 2, hence
+ the version number 2.1.]
+
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+copyrighted by the Free Software Foundation, write to the Free
+Software Foundation; we sometimes make exceptions for this.  Our
+decision will be guided by the two goals of preserving the free status
+of all derivatives of our free software and of promoting the sharing
+and reuse of software generally.
+
+                            NO WARRANTY
+
+  15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
+WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
+EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
+OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
+KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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+LIBRARY IS WITH YOU.  SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
+THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
+WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
+AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
+FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
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+LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
+RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
+FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
+SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+           How to Apply These Terms to Your New Libraries
+
+  If you develop a new library, and you want it to be of the greatest
+possible use to the public, we recommend making it free software that
+everyone can redistribute and change.  You can do so by permitting
+redistribution under these terms (or, alternatively, under the terms of the
+ordinary General Public License).
+
+  To apply these terms, attach the following notices to the library.  It is
+safest to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the library's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library 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
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+Also add information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the library, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the
+  library `Frob' (a library for tweaking knobs) written by James Random Hacker.
+
+  <signature of Ty Coon>, 1 April 1990
+  Ty Coon, President of Vice
+
+That's all there is to it!
\ No newline at end of file
diff --git a/externals/qhexedit/qhexedit.cpp b/externals/qhexedit/qhexedit.cpp
new file mode 100644
index 00000000..b12624e0
--- /dev/null
+++ b/externals/qhexedit/qhexedit.cpp
@@ -0,0 +1,180 @@
+#include <QtGui>
+
+#include "qhexedit.h"
+
+
+QHexEdit::QHexEdit(QWidget *parent) : QScrollArea(parent)
+{
+    qHexEdit_p = new QHexEditPrivate(this);
+    setWidget(qHexEdit_p);
+    setWidgetResizable(true);
+
+    connect(qHexEdit_p, SIGNAL(currentAddressChanged(int)), this, SIGNAL(currentAddressChanged(int)));
+    connect(qHexEdit_p, SIGNAL(currentSizeChanged(int)), this, SIGNAL(currentSizeChanged(int)));
+    connect(qHexEdit_p, SIGNAL(dataChanged()), this, SIGNAL(dataChanged()));
+    connect(qHexEdit_p, SIGNAL(overwriteModeChanged(bool)), this, SIGNAL(overwriteModeChanged(bool)));
+    setFocusPolicy(Qt::NoFocus);
+}
+
+int QHexEdit::indexOf(const QByteArray & ba, int from) const
+{
+    return qHexEdit_p->indexOf(ba, from);
+}
+
+void QHexEdit::insert(int i, const QByteArray & ba)
+{
+    qHexEdit_p->insert(i, ba);
+}
+
+void QHexEdit::insert(int i, char ch)
+{
+    qHexEdit_p->insert(i, ch);
+}
+
+int QHexEdit::lastIndexOf(const QByteArray & ba, int from) const
+{
+    return qHexEdit_p->lastIndexOf(ba, from);
+}
+
+void QHexEdit::remove(int pos, int len)
+{
+    qHexEdit_p->remove(pos, len);
+}
+
+void QHexEdit::replace( int pos, int len, const QByteArray & after)
+{
+    qHexEdit_p->replace(pos, len, after);
+}
+
+QString QHexEdit::toReadableString()
+{
+    return qHexEdit_p->toRedableString();
+}
+
+QString QHexEdit::selectionToReadableString()
+{
+    return qHexEdit_p->selectionToReadableString();
+}
+
+void QHexEdit::setAddressArea(bool addressArea)
+{
+    qHexEdit_p->setAddressArea(addressArea);
+}
+
+void QHexEdit::redo()
+{
+    qHexEdit_p->redo();
+}
+
+void QHexEdit::undo()
+{
+    qHexEdit_p->undo();
+}
+
+void QHexEdit::setAddressWidth(int addressWidth)
+{
+    qHexEdit_p->setAddressWidth(addressWidth);
+}
+
+void QHexEdit::setAsciiArea(bool asciiArea)
+{
+    qHexEdit_p->setAsciiArea(asciiArea);
+}
+
+void QHexEdit::setHighlighting(bool mode)
+{
+    qHexEdit_p->setHighlighting(mode);
+}
+
+void QHexEdit::setAddressOffset(int offset)
+{
+    qHexEdit_p->setAddressOffset(offset);
+}
+
+int QHexEdit::addressOffset()
+{
+    return qHexEdit_p->addressOffset();
+}
+
+void QHexEdit::setCursorPosition(int cursorPos)
+{
+    // cursorPos in QHexEditPrivate is the position of the textcoursor without
+    // blanks, means bytePos*2
+    qHexEdit_p->setCursorPos(cursorPos*2);
+}
+
+int QHexEdit::cursorPosition()
+{
+    return qHexEdit_p->cursorPos() / 2;
+}
+
+
+void QHexEdit::setData(const QByteArray &data)
+{
+    qHexEdit_p->setData(data);
+}
+
+QByteArray QHexEdit::data()
+{
+    return qHexEdit_p->data();
+}
+
+void QHexEdit::setAddressAreaColor(const QColor &color)
+{
+    qHexEdit_p->setAddressAreaColor(color);
+}
+
+QColor QHexEdit::addressAreaColor()
+{
+    return qHexEdit_p->addressAreaColor();
+}
+
+void QHexEdit::setHighlightingColor(const QColor &color)
+{
+    qHexEdit_p->setHighlightingColor(color);
+}
+
+QColor QHexEdit::highlightingColor()
+{
+    return qHexEdit_p->highlightingColor();
+}
+
+void QHexEdit::setSelectionColor(const QColor &color)
+{
+    qHexEdit_p->setSelectionColor(color);
+}
+
+QColor QHexEdit::selectionColor()
+{
+    return qHexEdit_p->selectionColor();
+}
+
+void QHexEdit::setOverwriteMode(bool overwriteMode)
+{
+    qHexEdit_p->setOverwriteMode(overwriteMode);
+}
+
+bool QHexEdit::overwriteMode()
+{
+    return qHexEdit_p->overwriteMode();
+}
+
+void QHexEdit::setReadOnly(bool readOnly)
+{
+    qHexEdit_p->setReadOnly(readOnly);
+}
+
+bool QHexEdit::isReadOnly()
+{
+    return qHexEdit_p->isReadOnly();
+}
+
+void QHexEdit::setFont(const QFont &font)
+{
+    qHexEdit_p->setFont(font);
+}
+
+const QFont & QHexEdit::font() const
+{
+    return qHexEdit_p->font();
+}
diff --git a/externals/qhexedit/qhexedit.h b/externals/qhexedit/qhexedit.h
new file mode 100644
index 00000000..15b6d760
--- /dev/null
+++ b/externals/qhexedit/qhexedit.h
@@ -0,0 +1,240 @@
+// Original author: Winfried Simon
+// See http://code.google.com/p/qhexedit2/
+// Huge thanks!
+
+#ifndef QHEXEDIT_H
+#define QHEXEDIT_H
+
+#include <QtGui>
+#include "qhexedit_p.h"
+
+/** \mainpage
+QHexEdit is a binary editor widget for Qt.
+
+\version Version 0.6.3
+\image html hexedit.png
+*/
+
+
+/*! QHexEdit is a hex editor widget written in C++ for the Qt (Qt4) framework.
+It is a simple editor for binary data, just like QPlainTextEdit is for text
+data. There are sip configuration files included, so it is easy to create
+bindings for PyQt and you can use this widget also in python.
+
+QHexEdit takes the data of a QByteArray (setData()) and shows it. You can use
+the mouse or the keyboard to navigate inside the widget. If you hit the keys
+(0..9, a..f) you will change the data. Changed data is highlighted and can be
+accessed via data().
+
+Normaly QHexEdit works in the overwrite Mode. You can set overwriteMode(false)
+and insert data. In this case the size of data() increases. It is also possible
+to delete bytes (del or backspace), here the size of data decreases.
+
+You can select data with keyboard hits or mouse movements. The copy-key will
+copy the selected data into the clipboard. The cut-key copies also but delets
+it afterwards. In overwrite mode, the paste function overwrites the content of
+the (does not change the length) data. In insert mode, clipboard data will be
+inserted. The clipboard content is expected in ASCII Hex notation. Unknown
+characters will be ignored.
+
+QHexEdit comes with undo/redo functionality. All changes can be undone, by
+pressing the undo-key (usually ctr-z). They can also be redone afterwards.
+The undo/redo framework is cleared, when setData() sets up a new
+content for the editor. You can search data inside the content with indexOf()
+and lastIndexOf(). The replace() function is to change located subdata. This
+'replaced' data can also be undone by the undo/redo framework.
+
+This widget can only handle small amounts of data. The size has to be below 10
+megabytes, otherwise the scroll sliders ard not shown and you can't scroll any
+more.
+*/
+        class QHexEdit : public QScrollArea
+{
+    Q_OBJECT
+    /*! Property data holds the content of QHexEdit. Call setData() to set the
+    content of QHexEdit, data() returns the actual content.
+    */
+    Q_PROPERTY(QByteArray data READ data WRITE setData)
+
+    /*! Property addressOffset is added to the Numbers of the Address Area.
+    A offset in the address area (left side) is sometimes usefull, whe you show
+    only a segment of a complete memory picture. With setAddressOffset() you set
+    this property - with addressOffset() you get the actual value.
+    */
+    Q_PROPERTY(int addressOffset READ addressOffset WRITE setAddressOffset)
+
+    /*! Property address area color sets (setAddressAreaColor()) the backgorund
+    color of address areas. You can also read the color (addressaAreaColor()).
+    */
+    Q_PROPERTY(QColor addressAreaColor READ addressAreaColor WRITE setAddressAreaColor)
+
+    /*! Porperty cursorPosition sets or gets the position of the editor cursor
+    in QHexEdit.
+    */
+    Q_PROPERTY(int cursorPosition READ cursorPosition WRITE setCursorPosition)
+
+    /*! Property highlighting color sets (setHighlightingColor()) the backgorund
+    color of highlighted text areas. You can also read the color
+    (highlightingColor()).
+    */
+    Q_PROPERTY(QColor highlightingColor READ highlightingColor WRITE setHighlightingColor)
+
+    /*! Property selection color sets (setSelectionColor()) the backgorund
+    color of selected text areas. You can also read the color
+    (selectionColor()).
+    */
+    Q_PROPERTY(QColor selectionColor READ selectionColor WRITE setSelectionColor)
+
+    /*! Porperty overwrite mode sets (setOverwriteMode()) or gets (overwriteMode()) the mode
+    in which the editor works. In overwrite mode the user will overwrite existing data. The
+    size of data will be constant. In insert mode the size will grow, when inserting
+    new data.
+    */
+    Q_PROPERTY(bool overwriteMode READ overwriteMode WRITE setOverwriteMode)
+
+    /*! Porperty readOnly sets (setReadOnly()) or gets (isReadOnly) the mode
+    in which the editor works. In readonly mode the the user can only navigate
+    through the data and select data; modifying is not possible. This
+    property's default is false.
+    */
+    Q_PROPERTY(bool readOnly READ isReadOnly WRITE setReadOnly)
+
+    /*! Set the font of the widget. Please use fixed width fonts like Mono or Courier.*/
+    Q_PROPERTY(QFont font READ font WRITE setFont)
+
+
+public:
+    /*! Creates an instance of QHexEdit.
+    \param parent Parent widget of QHexEdit.
+    */
+    QHexEdit(QWidget *parent = 0);
+
+    /*! Returns the index position of the first occurrence
+    of the byte array ba in this byte array, searching forward from index position
+    from. Returns -1 if ba could not be found. In addition to this functionality
+    of QByteArray the cursorposition is set to the end of found bytearray and
+    it will be selected.
+
+    */
+    int indexOf(const QByteArray & ba, int from = 0) const;
+
+    /*! Inserts a byte array.
+    \param i Index position, where to insert
+    \param ba byte array, which is to insert
+    In overwrite mode, the existing data will be overwritten, in insertmode ba will be
+    inserted and size of data grows.
+    */
+    void insert(int i, const QByteArray & ba);
+
+    /*! Inserts a char.
+    \param i Index position, where to insert
+    \param ch Char, which is to insert
+    In overwrite mode, the existing data will be overwritten, in insertmode ba will be
+    inserted and size of data grows.
+    */
+    void insert(int i, char ch);
+
+    /*! Returns the index position of the last occurrence
+    of the byte array ba in this byte array, searching backwards from index position
+    from. Returns -1 if ba could not be found. In addition to this functionality
+    of QByteArray the cursorposition is set to the beginning of found bytearray and
+    it will be selected.
+
+    */
+    int lastIndexOf(const QByteArray & ba, int from = 0) const;
+
+    /*! Removes len bytes from the content.
+    \param pos Index position, where to remove
+    \param len Amount of bytes to remove
+    In overwrite mode, the existing bytes will be overwriten with 0x00.
+    */
+    void remove(int pos, int len=1);
+
+    /*! Replaces len bytes from index position pos with the byte array after.
+    */
+    void replace( int pos, int len, const QByteArray & after);
+
+    /*! Gives back a formatted image of the content of QHexEdit
+    */
+    QString toReadableString();
+
+    /*! Gives back a formatted image of the selected content of QHexEdit
+    */
+    QString selectionToReadableString();
+
+    /*! \cond docNever */
+    void setAddressOffset(int offset);
+    int addressOffset();
+    void setCursorPosition(int cusorPos);
+    int cursorPosition();
+    void setData(QByteArray const &data);
+    QByteArray data();
+    void setAddressAreaColor(QColor const &color);
+    QColor addressAreaColor();
+    void setHighlightingColor(QColor const &color);
+    QColor highlightingColor();
+    void setSelectionColor(QColor const &color);
+    QColor selectionColor();
+    void setOverwriteMode(bool);
+    bool overwriteMode();
+    void setReadOnly(bool);
+    bool isReadOnly();
+    const QFont &font() const;
+    void setFont(const QFont &);
+    /*! \endcond docNever */
+
+public slots:
+    /*! Redoes the last operation. If there is no operation to redo, i.e.
+      there is no redo step in the undo/redo history, nothing happens.
+      */
+    void redo();
+
+    /*! Set the minimum width of the address area.
+      \param addressWidth Width in characters.
+      */
+    void setAddressWidth(int addressWidth);
+
+    /*! Switch the address area on or off.
+      \param addressArea true (show it), false (hide it).
+      */
+    void setAddressArea(bool addressArea);
+
+    /*! Switch the ascii area on or off.
+      \param asciiArea true (show it), false (hide it).
+      */
+    void setAsciiArea(bool asciiArea);
+
+    /*! Switch the highlighting feature on or of.
+      \param mode true (show it), false (hide it).
+      */
+    void setHighlighting(bool mode);
+
+    /*! Undoes the last operation. If there is no operation to undo, i.e.
+      there is no undo step in the undo/redo history, nothing happens.
+      */
+    void undo();
+
+signals:
+
+    /*! Contains the address, where the cursor is located. */
+    void currentAddressChanged(int address);
+
+    /*! Contains the size of the data to edit. */
+    void currentSizeChanged(int size);
+
+    /*! The signal is emited every time, the data is changed. */
+    void dataChanged();
+
+    /*! The signal is emited every time, the overwrite mode is changed. */
+    void overwriteModeChanged(bool state);
+
+private:
+    /*! \cond docNever */
+    QHexEditPrivate *qHexEdit_p;
+    QHBoxLayout *layout;
+    QScrollArea *scrollArea;
+    /*! \endcond docNever */
+};
+
+#endif
+
diff --git a/externals/qhexedit/qhexedit_p.cpp b/externals/qhexedit/qhexedit_p.cpp
new file mode 100644
index 00000000..c16f4ce4
--- /dev/null
+++ b/externals/qhexedit/qhexedit_p.cpp
@@ -0,0 +1,859 @@
+#include <QtGui>
+
+#include "qhexedit_p.h"
+#include "commands.h"
+
+const int HEXCHARS_IN_LINE = 47;
+const int GAP_ADR_HEX = 10;
+const int GAP_HEX_ASCII = 16;
+const int BYTES_PER_LINE = 16;
+
+QHexEditPrivate::QHexEditPrivate(QScrollArea *parent) : QWidget(parent)
+{
+    _undoStack = new QUndoStack(this);
+
+    _scrollArea = parent;
+    setAddressWidth(4);
+    setAddressOffset(0);
+    setAddressArea(true);
+    setAsciiArea(true);
+    setHighlighting(true);
+    setOverwriteMode(true);
+    setReadOnly(false);
+    setAddressAreaColor(QColor(0xd4, 0xd4, 0xd4, 0xff));
+    setHighlightingColor(QColor(0xff, 0xff, 0x99, 0xff));
+    setSelectionColor(QColor(0x6d, 0x9e, 0xff, 0xff));
+    setFont(QFont("Courier", 10));
+
+    _size = 0;
+    resetSelection(0);
+
+    setFocusPolicy(Qt::StrongFocus);
+
+    connect(&_cursorTimer, SIGNAL(timeout()), this, SLOT(updateCursor()));
+    _cursorTimer.setInterval(500);
+    _cursorTimer.start();
+}
+
+void QHexEditPrivate::setAddressOffset(int offset)
+{
+    _xData.setAddressOffset(offset);
+    adjust();
+}
+
+int QHexEditPrivate::addressOffset()
+{
+    return _xData.addressOffset();
+}
+
+void QHexEditPrivate::setData(const QByteArray &data)
+{
+    _xData.setData(data);
+    _undoStack->clear();
+    adjust();
+    setCursorPos(0);
+}
+
+QByteArray QHexEditPrivate::data()
+{
+    return _xData.data();
+}
+
+void QHexEditPrivate::setAddressAreaColor(const QColor &color)
+{
+    _addressAreaColor = color;
+    update();
+}
+
+QColor QHexEditPrivate::addressAreaColor()
+{
+    return _addressAreaColor;
+}
+
+void QHexEditPrivate::setHighlightingColor(const QColor &color)
+{
+    _highlightingColor = color;
+    update();
+}
+
+QColor QHexEditPrivate::highlightingColor()
+{
+    return _highlightingColor;
+}
+
+void QHexEditPrivate::setSelectionColor(const QColor &color)
+{
+    _selectionColor = color;
+    update();
+}
+
+QColor QHexEditPrivate::selectionColor()
+{
+    return _selectionColor;
+}
+
+void QHexEditPrivate::setReadOnly(bool readOnly)
+{
+    _readOnly = readOnly;
+}
+
+bool QHexEditPrivate::isReadOnly()
+{
+    return _readOnly;
+}
+
+XByteArray & QHexEditPrivate::xData()
+{
+    return _xData;
+}
+
+int QHexEditPrivate::indexOf(const QByteArray & ba, int from)
+{
+    if (from > (_xData.data().length() - 1))
+        from = _xData.data().length() - 1;
+    int idx = _xData.data().indexOf(ba, from);
+    if (idx > -1)
+    {
+        int curPos = idx*2;
+        setCursorPos(curPos + ba.length()*2);
+        resetSelection(curPos);
+        setSelection(curPos + ba.length()*2);
+        ensureVisible();
+    }
+    return idx;
+}
+
+void QHexEditPrivate::insert(int index, const QByteArray & ba)
+{
+    if (ba.length() > 0)
+    {
+        if (_overwriteMode)
+        {
+            QUndoCommand *arrayCommand= new ArrayCommand(&_xData, ArrayCommand::replace, index, ba, ba.length());
+            _undoStack->push(arrayCommand);
+            emit dataChanged();
+        }
+        else
+        {
+            QUndoCommand *arrayCommand= new ArrayCommand(&_xData, ArrayCommand::insert, index, ba, ba.length());
+            _undoStack->push(arrayCommand);
+            emit dataChanged();
+        }
+    }
+}
+
+void QHexEditPrivate::insert(int index, char ch)
+{
+    QUndoCommand *charCommand = new CharCommand(&_xData, CharCommand::insert, index, ch);
+    _undoStack->push(charCommand);
+    emit dataChanged();
+}
+
+int QHexEditPrivate::lastIndexOf(const QByteArray & ba, int from)
+{
+    from -= ba.length();
+    if (from < 0)
+        from = 0;
+    int idx = _xData.data().lastIndexOf(ba, from);
+    if (idx > -1)
+    {
+        int curPos = idx*2;
+        setCursorPos(curPos);
+        resetSelection(curPos);
+        setSelection(curPos + ba.length()*2);
+        ensureVisible();
+    }
+    return idx;
+}
+
+void QHexEditPrivate::remove(int index, int len)
+{
+    if (len > 0)
+    {
+        if (len == 1)
+        {
+            if (_overwriteMode)
+            {
+                QUndoCommand *charCommand = new CharCommand(&_xData, CharCommand::replace, index, char(0));
+                _undoStack->push(charCommand);
+                emit dataChanged();
+            }
+            else
+            {
+                QUndoCommand *charCommand = new CharCommand(&_xData, CharCommand::remove, index, char(0));
+                _undoStack->push(charCommand);
+                emit dataChanged();
+            }
+        }
+        else
+        {
+            QByteArray ba = QByteArray(len, char(0));
+            if (_overwriteMode)
+            {
+                QUndoCommand *arrayCommand = new ArrayCommand(&_xData, ArrayCommand::replace, index, ba, ba.length());
+                _undoStack->push(arrayCommand);
+                emit dataChanged();
+            }
+            else
+            {
+                QUndoCommand *arrayCommand= new ArrayCommand(&_xData, ArrayCommand::remove, index, ba, len);
+                _undoStack->push(arrayCommand);
+                emit dataChanged();
+            }
+        }
+    }
+}
+
+void QHexEditPrivate::replace(int index, char ch)
+{
+    QUndoCommand *charCommand = new CharCommand(&_xData, CharCommand::replace, index, ch);
+    _undoStack->push(charCommand);
+    resetSelection();
+    emit dataChanged();
+}
+
+void QHexEditPrivate::replace(int index, const QByteArray & ba)
+{
+    QUndoCommand *arrayCommand= new ArrayCommand(&_xData, ArrayCommand::replace, index, ba, ba.length());
+    _undoStack->push(arrayCommand);
+    resetSelection();
+    emit dataChanged();
+}
+
+void QHexEditPrivate::replace(int pos, int len, const QByteArray &after)
+{
+    QUndoCommand *arrayCommand= new ArrayCommand(&_xData, ArrayCommand::replace, pos, after, len);
+    _undoStack->push(arrayCommand);
+    resetSelection();
+    emit dataChanged();
+}
+
+void QHexEditPrivate::setAddressArea(bool addressArea)
+{
+    _addressArea = addressArea;
+    adjust();
+
+    setCursorPos(_cursorPosition);
+}
+
+void QHexEditPrivate::setAddressWidth(int addressWidth)
+{
+    _xData.setAddressWidth(addressWidth);
+
+    setCursorPos(_cursorPosition);
+}
+
+void QHexEditPrivate::setAsciiArea(bool asciiArea)
+{
+    _asciiArea = asciiArea;
+    adjust();
+}
+
+void QHexEditPrivate::setFont(const QFont &font)
+{
+    QWidget::setFont(font);
+    adjust();
+}
+
+void QHexEditPrivate::setHighlighting(bool mode)
+{
+    _highlighting = mode;
+    update();
+}
+
+void QHexEditPrivate::setOverwriteMode(bool overwriteMode)
+{
+    _overwriteMode = overwriteMode;
+}
+
+bool QHexEditPrivate::overwriteMode()
+{
+    return _overwriteMode;
+}
+
+void QHexEditPrivate::redo()
+{
+    _undoStack->redo();
+    emit dataChanged();
+    setCursorPos(_cursorPosition);
+    update();
+}
+
+void QHexEditPrivate::undo()
+{
+    _undoStack->undo();
+    emit dataChanged();
+    setCursorPos(_cursorPosition);
+    update();
+}
+
+QString QHexEditPrivate::toRedableString()
+{
+    return _xData.toRedableString();
+}
+
+
+QString QHexEditPrivate::selectionToReadableString()
+{
+    return _xData.toRedableString(getSelectionBegin(), getSelectionEnd());
+}
+
+void QHexEditPrivate::keyPressEvent(QKeyEvent *event)
+{
+    int charX = (_cursorX - _xPosHex) / _charWidth;
+    int posX = (charX / 3) * 2 + (charX % 3);
+    int posBa = (_cursorY / _charHeight) * BYTES_PER_LINE + posX / 2;
+
+
+/*****************************************************************************/
+/* Cursor movements */
+/*****************************************************************************/
+
+    if (event->matches(QKeySequence::MoveToNextChar))
+    {
+        setCursorPos(_cursorPosition + 1);
+        resetSelection(_cursorPosition);
+    }
+    if (event->matches(QKeySequence::MoveToPreviousChar))
+    {
+        setCursorPos(_cursorPosition - 1);
+        resetSelection(_cursorPosition);
+    }
+    if (event->matches(QKeySequence::MoveToEndOfLine))
+    {
+        setCursorPos(_cursorPosition | (2 * BYTES_PER_LINE -1));
+        resetSelection(_cursorPosition);
+    }
+    if (event->matches(QKeySequence::MoveToStartOfLine))
+    {
+        setCursorPos(_cursorPosition - (_cursorPosition % (2 * BYTES_PER_LINE)));
+        resetSelection(_cursorPosition);
+    }
+    if (event->matches(QKeySequence::MoveToPreviousLine))
+    {
+        setCursorPos(_cursorPosition - (2 * BYTES_PER_LINE));
+        resetSelection(_cursorPosition);
+    }
+    if (event->matches(QKeySequence::MoveToNextLine))
+    {
+        setCursorPos(_cursorPosition + (2 * BYTES_PER_LINE));
+        resetSelection(_cursorPosition);
+    }
+
+    if (event->matches(QKeySequence::MoveToNextPage))
+    {
+        setCursorPos(_cursorPosition + (((_scrollArea->viewport()->height() / _charHeight) - 1) * 2 * BYTES_PER_LINE));
+        resetSelection(_cursorPosition);
+    }
+    if (event->matches(QKeySequence::MoveToPreviousPage))
+    {
+        setCursorPos(_cursorPosition - (((_scrollArea->viewport()->height() / _charHeight) - 1) * 2 * BYTES_PER_LINE));
+        resetSelection(_cursorPosition);
+    }
+    if (event->matches(QKeySequence::MoveToEndOfDocument))
+    {
+        setCursorPos(_xData.size() * 2);
+        resetSelection(_cursorPosition);
+    }
+    if (event->matches(QKeySequence::MoveToStartOfDocument))
+    {
+        setCursorPos(0);
+        resetSelection(_cursorPosition);
+    }
+
+/*****************************************************************************/
+/* Select commands */
+/*****************************************************************************/
+    if (event->matches(QKeySequence::SelectAll))
+    {
+        resetSelection(0);
+        setSelection(2*_xData.size() + 1);
+    }
+    if (event->matches(QKeySequence::SelectNextChar))
+    {
+        int pos = _cursorPosition + 1;
+        setCursorPos(pos);
+        setSelection(pos);
+    }
+    if (event->matches(QKeySequence::SelectPreviousChar))
+    {
+        int pos = _cursorPosition - 1;
+        setSelection(pos);
+        setCursorPos(pos);
+    }
+    if (event->matches(QKeySequence::SelectEndOfLine))
+    {
+        int pos = _cursorPosition - (_cursorPosition % (2 * BYTES_PER_LINE)) + (2 * BYTES_PER_LINE);
+        setCursorPos(pos);
+        setSelection(pos);
+    }
+    if (event->matches(QKeySequence::SelectStartOfLine))
+    {
+        int pos = _cursorPosition - (_cursorPosition % (2 * BYTES_PER_LINE));
+        setCursorPos(pos);
+        setSelection(pos);
+    }
+    if (event->matches(QKeySequence::SelectPreviousLine))
+    {
+        int pos = _cursorPosition - (2 * BYTES_PER_LINE);
+        setCursorPos(pos);
+        setSelection(pos);
+    }
+    if (event->matches(QKeySequence::SelectNextLine))
+    {
+        int pos = _cursorPosition + (2 * BYTES_PER_LINE);
+        setCursorPos(pos);
+        setSelection(pos);
+    }
+
+    if (event->matches(QKeySequence::SelectNextPage))
+    {
+        int pos = _cursorPosition + (((_scrollArea->viewport()->height() / _charHeight) - 1) * 2 * BYTES_PER_LINE);
+        setCursorPos(pos);
+        setSelection(pos);
+    }
+    if (event->matches(QKeySequence::SelectPreviousPage))
+    {
+        int pos = _cursorPosition - (((_scrollArea->viewport()->height() / _charHeight) - 1) * 2 * BYTES_PER_LINE);
+        setCursorPos(pos);
+        setSelection(pos);
+    }
+    if (event->matches(QKeySequence::SelectEndOfDocument))
+    {
+        int pos = _xData.size() * 2;
+        setCursorPos(pos);
+        setSelection(pos);
+    }
+    if (event->matches(QKeySequence::SelectStartOfDocument))
+    {
+        int pos = 0;
+        setCursorPos(pos);
+        setSelection(pos);
+    }
+
+/*****************************************************************************/
+/* Edit Commands */
+/*****************************************************************************/
+if (!_readOnly)
+{
+    /* Hex input */
+        int key = int(event->text()[0].toAscii());
+        if ((key>='0' && key<='9') || (key>='a' && key <= 'f'))
+        {
+            if (getSelectionBegin() != getSelectionEnd())
+            {
+                posBa = getSelectionBegin();
+                remove(posBa, getSelectionEnd() - posBa);
+                setCursorPos(2*posBa);
+                resetSelection(2*posBa);
+            }
+
+            // If insert mode, then insert a byte
+            if (_overwriteMode == false)
+                if ((charX % 3) == 0)
+                {
+                    insert(posBa, char(0));
+                }
+
+            // Change content
+            if (_xData.size() > 0)
+            {
+                QByteArray hexValue = _xData.data().mid(posBa, 1).toHex();
+                if ((charX % 3) == 0)
+                    hexValue[0] = key;
+                else
+                    hexValue[1] = key;
+
+                replace(posBa, QByteArray().fromHex(hexValue)[0]);
+
+                setCursorPos(_cursorPosition + 1);
+                resetSelection(_cursorPosition);
+            }
+        }
+
+        /* Cut & Paste */
+        if (event->matches(QKeySequence::Cut))
+        {
+            QString result = QString();
+            for (int idx = getSelectionBegin(); idx < getSelectionEnd(); idx++)
+            {
+                result += _xData.data().mid(idx, 1).toHex() + " ";
+                if ((idx % 16) == 15)
+                    result.append("\n");
+            }
+            remove(getSelectionBegin(), getSelectionEnd() - getSelectionBegin());
+            QClipboard *clipboard = QApplication::clipboard();
+            clipboard->setText(result);
+            setCursorPos(getSelectionBegin());
+            resetSelection(getSelectionBegin());
+        }
+
+        if (event->matches(QKeySequence::Paste))
+        {
+            QClipboard *clipboard = QApplication::clipboard();
+            QByteArray ba = QByteArray().fromHex(clipboard->text().toLatin1());
+            insert(_cursorPosition / 2, ba);
+            setCursorPos(_cursorPosition + 2 * ba.length());
+            resetSelection(getSelectionBegin());
+        }
+
+
+        /* Delete char */
+        if (event->matches(QKeySequence::Delete))
+        {
+            if (getSelectionBegin() != getSelectionEnd())
+            {
+                posBa = getSelectionBegin();
+                remove(posBa, getSelectionEnd() - posBa);
+                setCursorPos(2*posBa);
+                resetSelection(2*posBa);
+            }
+            else
+            {
+                if (_overwriteMode)
+                    replace(posBa, char(0));
+                else
+                    remove(posBa, 1);
+            }
+        }
+
+        /* Backspace */
+        if ((event->key() == Qt::Key_Backspace) && (event->modifiers() == Qt::NoModifier))
+            {
+                if (getSelectionBegin() != getSelectionEnd())
+                {
+                    posBa = getSelectionBegin();
+                    remove(posBa, getSelectionEnd() - posBa);
+                    setCursorPos(2*posBa);
+                    resetSelection(2*posBa);
+                }
+                else
+                {
+                    if (posBa > 0)
+                    {
+                        if (_overwriteMode)
+                            replace(posBa - 1, char(0));
+                        else
+                            remove(posBa - 1, 1);
+                        setCursorPos(_cursorPosition - 2);
+                    }
+                }
+            }
+
+        /* undo */
+        if (event->matches(QKeySequence::Undo))
+        {
+            undo();
+        }
+
+        /* redo */
+        if (event->matches(QKeySequence::Redo))
+        {
+            redo();
+        }
+
+    }
+
+    if (event->matches(QKeySequence::Copy))
+    {
+        QString result = QString();
+        for (int idx = getSelectionBegin(); idx < getSelectionEnd(); idx++)
+        {
+            result += _xData.data().mid(idx, 1).toHex() + " ";
+            if ((idx % 16) == 15)
+                result.append('\n');
+        }
+        QClipboard *clipboard = QApplication::clipboard();
+        clipboard->setText(result);
+    }
+
+    // Switch between insert/overwrite mode
+    if ((event->key() == Qt::Key_Insert) && (event->modifiers() == Qt::NoModifier))
+    {
+        _overwriteMode = !_overwriteMode;
+        setCursorPos(_cursorPosition);
+        overwriteModeChanged(_overwriteMode);
+    }
+
+    ensureVisible();
+    update();
+}
+
+void QHexEditPrivate::mouseMoveEvent(QMouseEvent * event)
+{
+    _blink = false;
+    update();
+    int actPos = cursorPos(event->pos());
+    setCursorPos(actPos);
+    setSelection(actPos);
+}
+
+void QHexEditPrivate::mousePressEvent(QMouseEvent * event)
+{
+    _blink = false;
+    update();
+    int cPos = cursorPos(event->pos());
+    resetSelection(cPos);
+    setCursorPos(cPos);
+}
+
+void QHexEditPrivate::paintEvent(QPaintEvent *event)
+{
+    QPainter painter(this);
+
+    // draw some patterns if needed
+    painter.fillRect(event->rect(), this->palette().color(QPalette::Base));
+    if (_addressArea)
+        painter.fillRect(QRect(_xPosAdr, event->rect().top(), _xPosHex - GAP_ADR_HEX + 2, height()), _addressAreaColor);
+    if (_asciiArea)
+    {
+        int linePos = _xPosAscii - (GAP_HEX_ASCII / 2);
+        painter.setPen(Qt::gray);
+        painter.drawLine(linePos, event->rect().top(), linePos, height());
+    }
+
+    painter.setPen(this->palette().color(QPalette::WindowText));
+
+    // calc position
+    int firstLineIdx = ((event->rect().top()/ _charHeight) - _charHeight) * BYTES_PER_LINE;
+    if (firstLineIdx < 0)
+        firstLineIdx = 0;
+    int lastLineIdx = ((event->rect().bottom() / _charHeight) + _charHeight) * BYTES_PER_LINE;
+    if (lastLineIdx > _xData.size())
+        lastLineIdx = _xData.size();
+    int yPosStart = ((firstLineIdx) / BYTES_PER_LINE) * _charHeight + _charHeight;
+
+    // paint address area
+    if (_addressArea)
+    {
+        for (int lineIdx = firstLineIdx, yPos = yPosStart; lineIdx < lastLineIdx; lineIdx += BYTES_PER_LINE, yPos +=_charHeight)
+        {
+            QString address = QString("%1")
+                              .arg(lineIdx + _xData.addressOffset(), _xData.realAddressNumbers(), 16, QChar('0'));
+            painter.drawText(_xPosAdr, yPos, address);
+        }
+    }
+
+    // paint hex area
+    QByteArray hexBa(_xData.data().mid(firstLineIdx, lastLineIdx - firstLineIdx + 1).toHex());
+    QBrush highLighted = QBrush(_highlightingColor);
+    QPen colHighlighted = QPen(this->palette().color(QPalette::WindowText));
+    QBrush selected = QBrush(_selectionColor);
+    QPen colSelected = QPen(Qt::white);
+    QPen colStandard = QPen(this->palette().color(QPalette::WindowText));
+
+    painter.setBackgroundMode(Qt::TransparentMode);
+
+    for (int lineIdx = firstLineIdx, yPos = yPosStart; lineIdx < lastLineIdx; lineIdx += BYTES_PER_LINE, yPos +=_charHeight)
+    {
+        QByteArray hex;
+        int xPos = _xPosHex;
+        for (int colIdx = 0; ((lineIdx + colIdx) < _xData.size() && (colIdx < BYTES_PER_LINE)); colIdx++)
+        {
+            int posBa = lineIdx + colIdx;
+            if ((getSelectionBegin() <= posBa) && (getSelectionEnd() > posBa))
+            {
+                painter.setBackground(selected);
+                painter.setBackgroundMode(Qt::OpaqueMode);
+                painter.setPen(colSelected);
+            }
+            else
+            {
+                if (_highlighting)
+                {
+                    // hilight diff bytes
+                    painter.setBackground(highLighted);
+                    if (_xData.dataChanged(posBa))
+                    {
+                        painter.setPen(colHighlighted);
+                        painter.setBackgroundMode(Qt::OpaqueMode);
+                    }
+                    else
+                    {
+                        painter.setPen(colStandard);
+                        painter.setBackgroundMode(Qt::TransparentMode);
+                    }
+                }
+            }
+
+            // render hex value
+            if (colIdx == 0)
+            {
+                hex = hexBa.mid((lineIdx - firstLineIdx) * 2, 2);
+                painter.drawText(xPos, yPos, hex);
+                xPos += 2 * _charWidth;
+            } else {
+                hex = hexBa.mid((lineIdx + colIdx - firstLineIdx) * 2, 2).prepend(" ");
+                painter.drawText(xPos, yPos, hex);
+                xPos += 3 * _charWidth;
+            }
+
+        }
+    }
+    painter.setBackgroundMode(Qt::TransparentMode);
+    painter.setPen(this->palette().color(QPalette::WindowText));
+
+    // paint ascii area
+    if (_asciiArea)
+    {
+        for (int lineIdx = firstLineIdx, yPos = yPosStart; lineIdx < lastLineIdx; lineIdx += BYTES_PER_LINE, yPos +=_charHeight)
+        {
+            int xPosAscii = _xPosAscii;
+            for (int colIdx = 0; ((lineIdx + colIdx) < _xData.size() && (colIdx < BYTES_PER_LINE)); colIdx++)
+            {
+                painter.drawText(xPosAscii, yPos, _xData.asciiChar(lineIdx + colIdx));
+                xPosAscii += _charWidth;
+            }
+        }
+    }
+
+    // paint cursor
+    if (_blink && !_readOnly && hasFocus())
+    {
+        if (_overwriteMode)
+            painter.fillRect(_cursorX, _cursorY + _charHeight - 2, _charWidth, 2, this->palette().color(QPalette::WindowText));
+        else
+            painter.fillRect(_cursorX, _cursorY, 2, _charHeight, this->palette().color(QPalette::WindowText));
+    }
+
+    if (_size != _xData.size())
+    {
+        _size = _xData.size();
+        emit currentSizeChanged(_size);
+    }
+}
+
+void QHexEditPrivate::setCursorPos(int position)
+{
+    // delete cursor
+    _blink = false;
+    update();
+
+    // cursor in range?
+    if (_overwriteMode)
+    {
+        if (position > (_xData.size() * 2 - 1))
+            position = _xData.size() * 2 - 1;
+    } else {
+        if (position > (_xData.size() * 2))
+            position = _xData.size() * 2;
+    }
+
+    if (position < 0)
+        position = 0;
+
+    // calc position
+    _cursorPosition = position;
+    _cursorY = (position / (2 * BYTES_PER_LINE)) * _charHeight + 4;
+    int x = (position % (2 * BYTES_PER_LINE));
+    _cursorX = (((x / 2) * 3) + (x % 2)) * _charWidth + _xPosHex;
+
+    // immiadately draw cursor
+    _blink = true;
+    update();
+    emit currentAddressChanged(_cursorPosition/2);
+}
+
+int QHexEditPrivate::cursorPos(QPoint pos)
+{
+    int result = -1;
+    // find char under cursor
+    if ((pos.x() >= _xPosHex) && (pos.x() < (_xPosHex + HEXCHARS_IN_LINE * _charWidth)))
+    {
+        int x = (pos.x() - _xPosHex) / _charWidth;
+        if ((x % 3) == 0)
+            x = (x / 3) * 2;
+        else
+            x = ((x / 3) * 2) + 1;
+        int y = ((pos.y() - 3) / _charHeight) * 2 * BYTES_PER_LINE;
+        result = x + y;
+    }
+    return result;
+}
+
+int QHexEditPrivate::cursorPos()
+{
+    return _cursorPosition;
+}
+
+void QHexEditPrivate::resetSelection()
+{
+    _selectionBegin = _selectionInit;
+    _selectionEnd = _selectionInit;
+}
+
+void QHexEditPrivate::resetSelection(int pos)
+{
+    if (pos < 0)
+        pos = 0;
+    pos = pos / 2;
+    _selectionInit = pos;
+    _selectionBegin = pos;
+    _selectionEnd = pos;
+}
+
+void QHexEditPrivate::setSelection(int pos)
+{
+    if (pos < 0)
+        pos = 0;
+    pos = pos / 2;
+    if (pos >= _selectionInit)
+    {
+        _selectionEnd = pos;
+        _selectionBegin = _selectionInit;
+    }
+    else
+    {
+        _selectionBegin = pos;
+        _selectionEnd = _selectionInit;
+    }
+}
+
+int QHexEditPrivate::getSelectionBegin()
+{
+    return _selectionBegin;
+}
+
+int QHexEditPrivate::getSelectionEnd()
+{
+    return _selectionEnd;
+}
+
+
+void QHexEditPrivate::updateCursor()
+{
+    if (_blink)
+        _blink = false;
+    else
+        _blink = true;
+    update(_cursorX, _cursorY, _charWidth, _charHeight);
+}
+
+void QHexEditPrivate::adjust()
+{
+    _charWidth = fontMetrics().width(QLatin1Char('9'));
+    _charHeight = fontMetrics().height();
+
+    _xPosAdr = 0;
+    if (_addressArea)
+        _xPosHex = _xData.realAddressNumbers()*_charWidth + GAP_ADR_HEX;
+    else
+        _xPosHex = 0;
+    _xPosAscii = _xPosHex + HEXCHARS_IN_LINE * _charWidth + GAP_HEX_ASCII;
+
+    // tell QAbstractScollbar, how big we are
+    setMinimumHeight(((_xData.size()/16 + 1) * _charHeight) + 5);
+    if(_asciiArea)
+        setMinimumWidth(_xPosAscii + (BYTES_PER_LINE * _charWidth));
+    else
+        setMinimumWidth(_xPosHex + HEXCHARS_IN_LINE * _charWidth);
+
+    update();
+}
+
+void QHexEditPrivate::ensureVisible()
+{
+    // scrolls to cursorx, cusory (which are set by setCursorPos)
+    // x-margin is 3 pixels, y-margin is half of charHeight
+    _scrollArea->ensureVisible(_cursorX, _cursorY + _charHeight/2, 3, _charHeight/2 + 2);
+}
diff --git a/externals/qhexedit/qhexedit_p.h b/externals/qhexedit/qhexedit_p.h
new file mode 100644
index 00000000..138139b9
--- /dev/null
+++ b/externals/qhexedit/qhexedit_p.h
@@ -0,0 +1,125 @@
+#ifndef QHEXEDIT_P_H
+#define QHEXEDIT_P_H
+
+/** \cond docNever */
+
+
+#include <QtGui>
+#include "xbytearray.h"
+
+class QHexEditPrivate : public QWidget
+{
+Q_OBJECT
+
+public:
+    QHexEditPrivate(QScrollArea *parent);
+
+    void setAddressAreaColor(QColor const &color);
+    QColor addressAreaColor();
+
+    void setAddressOffset(int offset);
+    int addressOffset();
+
+    void setCursorPos(int position);
+    int cursorPos();
+
+    void setData(QByteArray const &data);
+    QByteArray data();
+
+    void setHighlightingColor(QColor const &color);
+    QColor highlightingColor();
+
+    void setOverwriteMode(bool overwriteMode);
+    bool overwriteMode();
+
+    void setReadOnly(bool readOnly);
+    bool isReadOnly();
+
+    void setSelectionColor(QColor const &color);
+    QColor selectionColor();
+
+    XByteArray & xData();
+
+    int indexOf(const QByteArray & ba, int from = 0);
+    void insert(int index, const QByteArray & ba);
+    void insert(int index, char ch);
+    int lastIndexOf(const QByteArray & ba, int from = 0);
+    void remove(int index, int len=1);
+    void replace(int index, char ch);
+    void replace(int index, const QByteArray & ba);
+    void replace(int pos, int len, const QByteArray & after);
+
+    void setAddressArea(bool addressArea);
+    void setAddressWidth(int addressWidth);
+    void setAsciiArea(bool asciiArea);
+    void setHighlighting(bool mode);
+    virtual void setFont(const QFont &font);
+
+    void undo();
+    void redo();
+
+    QString toRedableString();
+    QString selectionToReadableString();
+
+signals:
+    void currentAddressChanged(int address);
+    void currentSizeChanged(int size);
+    void dataChanged();
+    void overwriteModeChanged(bool state);
+
+protected:
+    void keyPressEvent(QKeyEvent * event);
+    void mouseMoveEvent(QMouseEvent * event);
+    void mousePressEvent(QMouseEvent * event);
+
+    void paintEvent(QPaintEvent *event);
+
+    int cursorPos(QPoint pos);          // calc cursorpos from graphics position. DOES NOT STORE POSITION
+
+    void resetSelection(int pos);       // set selectionStart and selectionEnd to pos
+    void resetSelection();              // set selectionEnd to selectionStart
+    void setSelection(int pos);         // set min (if below init) or max (if greater init)
+    int getSelectionBegin();
+    int getSelectionEnd();
+
+
+private slots:
+    void updateCursor();
+
+private:
+    void adjust();
+    void ensureVisible();
+
+    QColor _addressAreaColor;
+    QColor _highlightingColor;
+    QColor _selectionColor;
+    QScrollArea *_scrollArea;
+    QTimer _cursorTimer;
+    QUndoStack *_undoStack;
+
+    XByteArray _xData;                      // Hält den Inhalt des Hex Editors
+
+    bool _blink;                            // true: then cursor blinks
+    bool _renderingRequired;                // Flag to store that rendering is necessary
+    bool _addressArea;                      // left area of QHexEdit
+    bool _asciiArea;                        // medium area
+    bool _highlighting;                     // highlighting of changed bytes
+    bool _overwriteMode;
+    bool _readOnly;                         // true: the user can only look and navigate
+
+    int _charWidth, _charHeight;            // char dimensions (dpendend on font)
+    int _cursorX, _cursorY;                 // graphics position of the cursor
+    int _cursorPosition;                    // character positioin in stream (on byte ends in to steps)
+    int _xPosAdr, _xPosHex, _xPosAscii;     // graphics x-position of the areas
+
+    int _selectionBegin;                    // First selected char
+    int _selectionEnd;                      // Last selected char
+    int _selectionInit;                     // That's, where we pressed the mouse button
+
+    int _size;
+};
+
+/** \endcond docNever */
+
+#endif
+
diff --git a/externals/qhexedit/xbytearray.cpp b/externals/qhexedit/xbytearray.cpp
new file mode 100644
index 00000000..09a04cfe
--- /dev/null
+++ b/externals/qhexedit/xbytearray.cpp
@@ -0,0 +1,167 @@
+#include "xbytearray.h"
+
+XByteArray::XByteArray()
+{
+    _oldSize = -99;
+    _addressNumbers = 4;
+    _addressOffset = 0;
+
+}
+
+int XByteArray::addressOffset()
+{
+    return _addressOffset;
+}
+
+void XByteArray::setAddressOffset(int offset)
+{
+    _addressOffset = offset;
+}
+
+int XByteArray::addressWidth()
+{
+    return _addressNumbers;
+}
+
+void XByteArray::setAddressWidth(int width)
+{
+    if ((width >= 0) && (width<=6))
+    {
+        _addressNumbers = width;
+    }
+}
+
+QByteArray & XByteArray::data()
+{
+    return _data;
+}
+
+void XByteArray::setData(QByteArray data)
+{
+    _data = data;
+    _changedData = QByteArray(data.length(), char(0));
+}
+
+bool XByteArray::dataChanged(int i)
+{
+    return bool(_changedData[i]);
+}
+
+QByteArray XByteArray::dataChanged(int i, int len)
+{
+    return _changedData.mid(i, len);
+}
+
+void XByteArray::setDataChanged(int i, bool state)
+{
+    _changedData[i] = char(state);
+}
+
+void XByteArray::setDataChanged(int i, const QByteArray & state)
+{
+    int length = state.length();
+    int len;
+    if ((i + length) > _changedData.length())
+        len = _changedData.length() - i;
+    else
+        len = length;
+    _changedData.replace(i, len, state);
+}
+
+int XByteArray::realAddressNumbers()
+{
+    if (_oldSize != _data.size())
+    {
+        // is addressNumbers wide enought?
+        QString test = QString("%1")
+                      .arg(_data.size() + _addressOffset, _addressNumbers, 16, QChar('0'));
+        _realAddressNumbers = test.size();
+    }
+    return _realAddressNumbers;
+}
+
+int XByteArray::size()
+{
+    return _data.size();
+}
+
+QByteArray & XByteArray::insert(int i, char ch)
+{
+    _data.insert(i, ch);
+    _changedData.insert(i, char(1));
+    return _data;
+}
+
+QByteArray & XByteArray::insert(int i, const QByteArray & ba)
+{
+    _data.insert(i, ba);
+    _changedData.insert(i, QByteArray(ba.length(), char(1)));
+    return _data;
+}
+
+QByteArray & XByteArray::remove(int i, int len)
+{
+    _data.remove(i, len);
+    _changedData.remove(i, len);
+    return _data;
+}
+
+QByteArray & XByteArray::replace(int index, char ch)
+{
+    _data[index] = ch;
+    _changedData[index] = char(1);
+    return _data;
+}
+
+QByteArray & XByteArray::replace(int index, const QByteArray & ba)
+{
+    int len = ba.length();
+    return replace(index, len, ba);
+}
+
+QByteArray & XByteArray::replace(int index, int length, const QByteArray & ba)
+{
+    int len;
+    if ((index + length) > _data.length())
+        len = _data.length() - index;
+    else
+        len = length;
+    _data.replace(index, len, ba.mid(0, len));
+    _changedData.replace(index, len, QByteArray(len, char(1)));
+    return _data;
+}
+
+QChar XByteArray::asciiChar(int index)
+{
+    char ch = _data[index];
+    if ((ch < 0x20) || (ch > 0x7e))
+            ch = '.';
+    return QChar(ch);
+}
+
+QString XByteArray::toRedableString(int start, int end)
+{
+    int adrWidth = realAddressNumbers();
+    if (_addressNumbers > adrWidth)
+        adrWidth = _addressNumbers;
+    if (end < 0)
+        end = _data.size();
+
+    QString result;
+    for (int i=start; i < end; i += 16)
+    {
+        QString adrStr = QString("%1").arg(_addressOffset + i, adrWidth, 16, QChar('0'));
+        QString hexStr;
+        QString ascStr;
+        for (int j=0; j<16; j++)
+        {
+            if ((i + j) < _data.size())
+            {
+                hexStr.append(" ").append(_data.mid(i+j, 1).toHex());
+                ascStr.append(asciiChar(i+j));
+            }
+        }
+        result += adrStr + " " + QString("%1").arg(hexStr, -48) + "  " + QString("%1").arg(ascStr, -17) + "\n";
+    }
+    return result;
+}
diff --git a/externals/qhexedit/xbytearray.h b/externals/qhexedit/xbytearray.h
new file mode 100644
index 00000000..2b67c61b
--- /dev/null
+++ b/externals/qhexedit/xbytearray.h
@@ -0,0 +1,66 @@
+#ifndef XBYTEARRAY_H
+#define XBYTEARRAY_H
+
+/** \cond docNever */
+
+#include <QtCore>
+
+/*! XByteArray represents the content of QHexEcit.
+XByteArray comprehend the data itself and informations to store if it was
+changed. The QHexEdit component uses these informations to perform nice
+rendering of the data
+
+XByteArray also provides some functionality to insert, replace and remove
+single chars and QByteArras. Additionally some functions support rendering
+and converting to readable strings.
+*/
+class XByteArray
+{
+public:
+    explicit XByteArray();
+
+    int addressOffset();
+    void setAddressOffset(int offset);
+
+    int addressWidth();
+    void setAddressWidth(int width);
+
+    QByteArray & data();
+    void setData(QByteArray data);
+
+    bool dataChanged(int i);
+    QByteArray dataChanged(int i, int len);
+    void setDataChanged(int i, bool state);
+    void setDataChanged(int i, const QByteArray & state);
+
+    int realAddressNumbers();
+    int size();
+
+    QByteArray & insert(int i, char ch);
+    QByteArray & insert(int i, const QByteArray & ba);
+
+    QByteArray & remove(int pos, int len);
+
+    QByteArray & replace(int index, char ch);
+    QByteArray & replace(int index, const QByteArray & ba);
+    QByteArray & replace(int index, int length, const QByteArray & ba);
+
+    QChar asciiChar(int index);
+    QString toRedableString(int start=0, int end=-1);
+
+signals:
+
+public slots:
+
+private:
+    QByteArray _data;
+    QByteArray _changedData;
+
+    int _addressNumbers;                    // wanted width of address area
+    int _addressOffset;                     // will be added to the real addres inside bytearray
+    int _realAddressNumbers;                // real width of address area (can be greater then wanted width)
+    int _oldSize;                           // size of data
+};
+
+/** \endcond docNever */
+#endif // XBYTEARRAY_H