Add memory viewer based on a (modified) widget from

https://github.com/Simsys/qhexedit2


Signed-off-by: Andrea Odetti <mariofutire@gmail.com>

source/frontends/qapple/chunks.cpp

@@ -0,0 +1,323 @@
+#include "chunks.h"
+#include <limits.h>
+
+#define NORMAL 0
+#define HIGHLIGHTED 1
+
+#define BUFFER_SIZE 0x10000
+#define CHUNK_SIZE 0x1000
+#define READ_CHUNK_MASK Q_INT64_C(0xfffffffffffff000)
+
+// ***************************************** Constructors and file settings
+
+Chunks::Chunks(QObject *parent): QObject(parent)
+{
+    QBuffer *buf = new QBuffer(this);
+    setIODevice(*buf);
+}
+
+Chunks::Chunks(QIODevice &ioDevice, QObject *parent): QObject(parent)
+{
+    setIODevice(ioDevice);
+}
+
+bool Chunks::setIODevice(QIODevice &ioDevice)
+{
+    _ioDevice = &ioDevice;
+    bool ok = _ioDevice->open(QIODevice::ReadOnly);
+    if (ok)   // Try to open IODevice
+    {
+        _size = _ioDevice->size();
+        _ioDevice->close();
+    }
+    else                                        // Fallback is an empty buffer
+    {
+        QBuffer *buf = new QBuffer(this);
+        _ioDevice = buf;
+        _size = 0;
+    }
+    _chunks.clear();
+    _pos = 0;
+    return ok;
+}
+
+
+// ***************************************** Getting data out of Chunks
+
+QByteArray Chunks::data(qint64 pos, qint64 maxSize, QByteArray *highlighted)
+{
+    qint64 ioDelta = 0;
+    int chunkIdx = 0;
+
+    Chunk chunk;
+    QByteArray buffer;
+
+    // Do some checks and some arrangements
+    if (highlighted)
+        highlighted->clear();
+
+    if (pos >= _size)
+        return buffer;
+
+    if (maxSize < 0)
+        maxSize = _size;
+    else
+        if ((pos + maxSize) > _size)
+            maxSize = _size - pos;
+
+    _ioDevice->open(QIODevice::ReadOnly);
+
+    while (maxSize > 0)
+    {
+        chunk.absPos = LLONG_MAX;
+        bool chunksLoopOngoing = true;
+        while ((chunkIdx < _chunks.count()) && chunksLoopOngoing)
+        {
+            // In this section, we track changes before our required data and
+            // we take the editdet data, if availible. ioDelta is a difference
+            // counter to justify the read pointer to the original data, if
+            // data in between was deleted or inserted.
+
+            chunk = _chunks[chunkIdx];
+            if (chunk.absPos > pos)
+                chunksLoopOngoing = false;
+            else
+            {
+                chunkIdx += 1;
+                qint64 count;
+                qint64 chunkOfs = pos - chunk.absPos;
+                if (maxSize > ((qint64)chunk.data.size() - chunkOfs))
+                {
+                    count = (qint64)chunk.data.size() - chunkOfs;
+                    ioDelta += CHUNK_SIZE - chunk.data.size();
+                }
+                else
+                    count = maxSize;
+                if (count > 0)
+                {
+                    buffer += chunk.data.mid(chunkOfs, (int)count);
+                    maxSize -= count;
+                    pos += count;
+                    if (highlighted)
+                        *highlighted += chunk.dataChanged.mid(chunkOfs, (int)count);
+                }
+            }
+        }
+
+        if ((maxSize > 0) && (pos < chunk.absPos))
+        {
+            // In this section, we read data from the original source. This only will
+            // happen, whe no copied data is available
+
+            qint64 byteCount;
+            QByteArray readBuffer;
+            if ((chunk.absPos - pos) > maxSize)
+                byteCount = maxSize;
+            else
+                byteCount = chunk.absPos - pos;
+
+            maxSize -= byteCount;
+            _ioDevice->seek(pos + ioDelta);
+            readBuffer = _ioDevice->read(byteCount);
+            buffer += readBuffer;
+            if (highlighted)
+                *highlighted += QByteArray(readBuffer.size(), NORMAL);
+            pos += readBuffer.size();
+        }
+    }
+    _ioDevice->close();
+    return buffer;
+}
+
+bool Chunks::write(QIODevice &iODevice, qint64 pos, qint64 count)
+{
+    if (count == -1)
+        count = _size;
+    bool ok = iODevice.open(QIODevice::WriteOnly);
+    if (ok)
+    {
+        for (qint64 idx=pos; idx < count; idx += BUFFER_SIZE)
+        {
+            QByteArray ba = data(idx, BUFFER_SIZE);
+            iODevice.write(ba);
+        }
+        iODevice.close();
+    }
+    return ok;
+}
+
+
+// ***************************************** Set and get highlighting infos
+
+void Chunks::setDataChanged(qint64 pos, bool dataChanged)
+{
+    if ((pos < 0) || (pos >= _size))
+        return;
+    int chunkIdx = getChunkIndex(pos);
+    qint64 posInBa = pos - _chunks[chunkIdx].absPos;
+    _chunks[chunkIdx].dataChanged[(int)posInBa] = char(dataChanged);
+}
+
+bool Chunks::dataChanged(qint64 pos)
+{
+    QByteArray highlighted;
+    data(pos, 1, &highlighted);
+    return bool(highlighted.at(0));
+}
+
+
+// ***************************************** Search API
+
+qint64 Chunks::indexOf(const QByteArray &ba, qint64 from)
+{
+    qint64 result = -1;
+    QByteArray buffer;
+
+    for (qint64 pos=from; (pos < _size) && (result < 0); pos += BUFFER_SIZE)
+    {
+        buffer = data(pos, BUFFER_SIZE + ba.size() - 1);
+        int findPos = buffer.indexOf(ba);
+        if (findPos >= 0)
+            result = pos + (qint64)findPos;
+    }
+    return result;
+}
+
+qint64 Chunks::lastIndexOf(const QByteArray &ba, qint64 from)
+{
+    qint64 result = -1;
+    QByteArray buffer;
+
+    for (qint64 pos=from; (pos > 0) && (result < 0); pos -= BUFFER_SIZE)
+    {
+        qint64 sPos = pos - BUFFER_SIZE - (qint64)ba.size() + 1;
+        if (sPos < 0)
+            sPos = 0;
+        buffer = data(sPos, pos - sPos);
+        int findPos = buffer.lastIndexOf(ba);
+        if (findPos >= 0)
+            result = sPos + (qint64)findPos;
+    }
+    return result;
+}
+
+
+// ***************************************** Char manipulations
+
+bool Chunks::insert(qint64 pos, char b)
+{
+    if ((pos < 0) || (pos > _size))
+        return false;
+    int chunkIdx;
+    if (pos == _size)
+        chunkIdx = getChunkIndex(pos-1);
+    else
+        chunkIdx = getChunkIndex(pos);
+    qint64 posInBa = pos - _chunks[chunkIdx].absPos;
+    _chunks[chunkIdx].data.insert(posInBa, b);
+    _chunks[chunkIdx].dataChanged.insert(posInBa, char(1));
+    for (int idx=chunkIdx+1; idx < _chunks.size(); idx++)
+        _chunks[idx].absPos += 1;
+    _size += 1;
+    _pos = pos;
+    return true;
+}
+
+bool Chunks::overwrite(qint64 pos, char b)
+{
+    if ((pos < 0) || (pos >= _size))
+        return false;
+    int chunkIdx = getChunkIndex(pos);
+    qint64 posInBa = pos - _chunks[chunkIdx].absPos;
+    _chunks[chunkIdx].data[(int)posInBa] = b;
+    _chunks[chunkIdx].dataChanged[(int)posInBa] = char(1);
+    _pos = pos;
+    return true;
+}
+
+bool Chunks::removeAt(qint64 pos)
+{
+    if ((pos < 0) || (pos >= _size))
+        return false;
+    int chunkIdx = getChunkIndex(pos);
+    qint64 posInBa = pos - _chunks[chunkIdx].absPos;
+    _chunks[chunkIdx].data.remove(posInBa, 1);
+    _chunks[chunkIdx].dataChanged.remove(posInBa, 1);
+    for (int idx=chunkIdx+1; idx < _chunks.size(); idx++)
+        _chunks[idx].absPos -= 1;
+    _size -= 1;
+    _pos = pos;
+    return true;
+}
+
+
+// ***************************************** Utility functions
+
+char Chunks::operator[](qint64 pos)
+{
+    return data(pos, 1)[0];
+}
+
+qint64 Chunks::pos()
+{
+    return _pos;
+}
+
+qint64 Chunks::size()
+{
+    return _size;
+}
+
+int Chunks::getChunkIndex(qint64 absPos)
+{
+    // This routine checks, if there is already a copied chunk available. If os, it
+    // returns a reference to it. If there is no copied chunk available, original
+    // data will be copied into a new chunk.
+
+    int foundIdx = -1;
+    int insertIdx = 0;
+    qint64 ioDelta = 0;
+
+
+    for (int idx=0; idx < _chunks.size(); idx++)
+    {
+        Chunk chunk = _chunks[idx];
+        if ((absPos >= chunk.absPos) && (absPos < (chunk.absPos + chunk.data.size())))
+        {
+            foundIdx = idx;
+            break;
+        }
+        if (absPos < chunk.absPos)
+        {
+            insertIdx = idx;
+            break;
+        }
+        ioDelta += chunk.data.size() - CHUNK_SIZE;
+        insertIdx = idx + 1;
+    }
+
+    if (foundIdx == -1)
+    {
+        Chunk newChunk;
+        qint64 readAbsPos = absPos - ioDelta;
+        qint64 readPos = (readAbsPos & READ_CHUNK_MASK);
+        _ioDevice->open(QIODevice::ReadOnly);
+        _ioDevice->seek(readPos);
+        newChunk.data = _ioDevice->read(CHUNK_SIZE);
+        _ioDevice->close();
+        newChunk.absPos = absPos - (readAbsPos - readPos);
+        newChunk.dataChanged = QByteArray(newChunk.data.size(), char(0));
+        _chunks.insert(insertIdx, newChunk);
+        foundIdx = insertIdx;
+    }
+    return foundIdx;
+}
+
+
+#ifdef MODUL_TEST
+int Chunks::chunkSize()
+{
+    return _chunks.size();
+}
+
+#endif

source/frontends/qapple/chunks.h

@@ -0,0 +1,77 @@
+#ifndef CHUNKS_H
+#define CHUNKS_H
+
+/** \cond docNever */
+
+/*! The Chunks class is the storage backend for QHexEdit.
+ *
+ * When QHexEdit loads data, Chunks access them using a QIODevice interface. When the app uses
+ * a QByteArray interface, QBuffer is used to provide again a QIODevice like interface. No data
+ * will be changed, therefore Chunks opens the QIODevice in QIODevice::ReadOnly mode. After every
+ * access Chunks closes the QIODevice, that's why external applications can overwrite files while
+ * QHexEdit shows them.
+ *
+ * When the the user starts to edit the data, Chunks creates a local copy of a chunk of data (4
+ * kilobytes) and notes all changes there. Parallel to that chunk, there is a second chunk,
+ * which keep track of which bytes are changed and which not.
+ *
+ */
+
+#include <QtCore>
+
+struct Chunk
+{
+    QByteArray data;
+    QByteArray dataChanged;
+    qint64 absPos;
+};
+
+class Chunks: public QObject
+{
+Q_OBJECT
+public:
+    // Constructors and file settings
+    Chunks(QObject *parent);
+    Chunks(QIODevice &ioDevice, QObject *parent);
+    bool setIODevice(QIODevice &ioDevice);
+
+    // Getting data out of Chunks
+    QByteArray data(qint64 pos=0, qint64 count=-1, QByteArray *highlighted=0);
+    bool write(QIODevice &iODevice, qint64 pos=0, qint64 count=-1);
+
+    // Set and get highlighting infos
+    void setDataChanged(qint64 pos, bool dataChanged);
+    bool dataChanged(qint64 pos);
+
+    // Search API
+    qint64 indexOf(const QByteArray &ba, qint64 from);
+    qint64 lastIndexOf(const QByteArray &ba, qint64 from);
+
+    // Char manipulations
+    bool insert(qint64 pos, char b);
+    bool overwrite(qint64 pos, char b);
+    bool removeAt(qint64 pos);
+
+    // Utility functions
+    char operator[](qint64 pos);
+    qint64 pos();
+    qint64 size();
+
+
+private:
+    int getChunkIndex(qint64 absPos);
+
+    QIODevice * _ioDevice;
+    qint64 _pos;
+    qint64 _size;
+    QList<Chunk> _chunks;
+
+#ifdef MODUL_TEST
+public:
+    int chunkSize();
+#endif
+};
+
+/** \endcond docNever */
+
+#endif // CHUNKS_H

source/frontends/qapple/commands.cpp

@@ -0,0 +1,165 @@
+#include "commands.h"
+#include <QUndoCommand>
+
+
+// Helper class to store single byte commands
+class CharCommand : public QUndoCommand
+{
+public:
+    enum CCmd {insert, removeAt, overwrite};
+
+    CharCommand(Chunks * chunks, CCmd cmd, qint64 charPos, char newChar,
+                       QUndoCommand *parent=0);
+
+    void undo();
+    void redo();
+    bool mergeWith(const QUndoCommand *command);
+    int id() const { return 1234; }
+
+private:
+    Chunks * _chunks;
+    qint64 _charPos;
+    bool _wasChanged;
+    char _newChar;
+    char _oldChar;
+    CCmd _cmd;
+};
+
+CharCommand::CharCommand(Chunks * chunks, CCmd cmd, qint64 charPos, char newChar, QUndoCommand *parent)
+    : QUndoCommand(parent)
+{
+    _chunks = chunks;
+    _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 != CharCommand::removeAt)
+    {
+        if (nextCommand->_cmd == overwrite)
+            if (nextCommand->_charPos == _charPos)
+            {
+                _newChar = nextCommand->_newChar;
+                result = true;
+            }
+    }
+    return result;
+}
+
+void CharCommand::undo()
+{
+    switch (_cmd)
+    {
+        case insert:
+            _chunks->removeAt(_charPos);
+            break;
+        case overwrite:
+            _chunks->overwrite(_charPos, _oldChar);
+            _chunks->setDataChanged(_charPos, _wasChanged);
+            break;
+        case removeAt:
+            _chunks->insert(_charPos, _oldChar);
+            _chunks->setDataChanged(_charPos, _wasChanged);
+            break;
+    }
+}
+
+void CharCommand::redo()
+{
+    switch (_cmd)
+    {
+        case insert:
+            _chunks->insert(_charPos, _newChar);
+            break;
+        case overwrite:
+            _oldChar = (*_chunks)[_charPos];
+            _wasChanged = _chunks->dataChanged(_charPos);
+            _chunks->overwrite(_charPos, _newChar);
+            break;
+        case removeAt:
+            _oldChar = (*_chunks)[_charPos];
+            _wasChanged = _chunks->dataChanged(_charPos);
+            _chunks->removeAt(_charPos);
+            break;
+    }
+}
+
+UndoStack::UndoStack(Chunks * chunks, QObject * parent)
+    : QUndoStack(parent)
+{
+    _chunks = chunks;
+    _parent = parent;
+}
+
+void UndoStack::insert(qint64 pos, char c)
+{
+    if ((pos >= 0) && (pos <= _chunks->size()))
+    {
+        QUndoCommand *cc = new CharCommand(_chunks, CharCommand::insert, pos, c);
+        this->push(cc);
+    }
+}
+
+void UndoStack::insert(qint64 pos, const QByteArray &ba)
+{
+    if ((pos >= 0) && (pos <= _chunks->size()))
+    {
+        QString txt = QString(tr("Inserting %1 bytes")).arg(ba.size());
+        beginMacro(txt);
+        for (int idx=0; idx < ba.size(); idx++)
+        {
+            QUndoCommand *cc = new CharCommand(_chunks, CharCommand::insert, pos + idx, ba.at(idx));
+            this->push(cc);
+        }
+        endMacro();
+    }
+}
+
+void UndoStack::removeAt(qint64 pos, qint64 len)
+{
+    if ((pos >= 0) && (pos < _chunks->size()))
+    {
+        if (len==1)
+        {
+            QUndoCommand *cc = new CharCommand(_chunks, CharCommand::removeAt, pos, char(0));
+            this->push(cc);
+        }
+        else
+        {
+            QString txt = QString(tr("Delete %1 chars")).arg(len);
+            beginMacro(txt);
+            for (qint64 cnt=0; cnt<len; cnt++)
+            {
+                QUndoCommand *cc = new CharCommand(_chunks, CharCommand::removeAt, pos, char(0));
+                push(cc);
+            }
+            endMacro();
+        }
+    }
+}
+
+void UndoStack::overwrite(qint64 pos, char c)
+{
+    if ((pos >= 0) && (pos < _chunks->size()))
+    {
+        QUndoCommand *cc = new CharCommand(_chunks, CharCommand::overwrite, pos, c);
+        this->push(cc);
+    }
+}
+
+void UndoStack::overwrite(qint64 pos, int len, const QByteArray &ba)
+{
+    if ((pos >= 0) && (pos < _chunks->size()))
+    {
+        QString txt = QString(tr("Overwrite %1 chars")).arg(len);
+        beginMacro(txt);
+        removeAt(pos, len);
+        insert(pos, ba);
+        endMacro();
+    }
+}

source/frontends/qapple/commands.h

@@ -0,0 +1,47 @@
+#ifndef COMMANDS_H
+#define COMMANDS_H
+
+/** \cond docNever */
+
+#include <QUndoStack>
+
+#include "chunks.h"
+
+/*! CharCommand is a class to provid 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. overwrite and
+remove characters. A manipulation stores allways two 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", overwrite it with "03" and the overwrite it with "34". These
+3 steps are combined into a single step, insert a "34".
+
+The byte array oriented commands are just put into a set of single byte commands,
+which are pooled together with the macroBegin() and macroEnd() functionality of
+Qt's QUndoStack.
+*/
+
+class UndoStack : public QUndoStack
+{
+    Q_OBJECT
+
+public:
+    UndoStack(Chunks *chunks, QObject * parent=0);
+    void insert(qint64 pos, char c);
+    void insert(qint64 pos, const QByteArray &ba);
+    void removeAt(qint64 pos, qint64 len=1);
+    void overwrite(qint64 pos, char c);
+    void overwrite(qint64 pos, int len, const QByteArray &ba);
+
+private:
+    Chunks * _chunks;
+    QObject * _parent;
+};
+
+/** \endcond docNever */
+
+#endif // COMMANDS_H

source/frontends/qapple/memorycontainer.cpp

@@ -0,0 +1,22 @@
+#include "memorycontainer.h"
+
+#include "StdAfx.h"
+#include "Memory.h"
+
+MemoryContainer::MemoryContainer(QWidget *parent) :
+    QTabWidget(parent)
+{
+    setupUi(this);
+
+    const char * mainBase = (const char *)MemGetMainPtr(0);
+    QByteArray mainMemory = QByteArray::fromRawData(mainBase, 0x10000);
+
+    main->setReadOnly(true);
+    main->setData(mainMemory);
+
+    const char * auxBase = (const char *)MemGetAuxPtr(0);
+    QByteArray auxMemory = QByteArray::fromRawData(auxBase, 0x10000);
+
+    aux->setReadOnly(true);
+    aux->setData(auxMemory);
+}

source/frontends/qapple/memorycontainer.h

@@ -0,0 +1,14 @@
+#ifndef MEMORYCONTAINER_H
+#define MEMORYCONTAINER_H
+
+#include "ui_memorycontainer.h"
+
+class MemoryContainer : public QTabWidget, private Ui::MemoryContainer
+{
+    Q_OBJECT
+
+public:
+    explicit MemoryContainer(QWidget *parent = 0);
+};
+
+#endif // MEMORYCONTAINER_H

source/frontends/qapple/memorycontainer.ui

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MemoryContainer</class>
+ <widget class="QTabWidget" name="MemoryContainer">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Memory</string>
+  </property>
+  <property name="currentIndex">
+   <number>0</number>
+  </property>
+  <widget class="QWidget" name="tab">
+   <attribute name="title">
+    <string>Main</string>
+   </attribute>
+   <layout class="QGridLayout" name="gridLayout">
+    <item row="0" column="0">
+     <widget class="QHexEdit" name="main" native="true"/>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QWidget" name="tab">
+   <attribute name="title">
+    <string>Aux</string>
+   </attribute>
+   <layout class="QGridLayout" name="gridLayout_2">
+    <item row="0" column="0">
+     <widget class="QHexEdit" name="aux" native="true"/>
+    </item>
+   </layout>
+  </widget>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>QHexEdit</class>
+   <extends>QWidget</extends>
+   <header>qhexedit.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
+ <resources/>
+ <connections/>
+</ui>

source/frontends/qapple/qapple.cpp

@@ -19,6 +19,7 @@
 #include "linux/joy_input.h"
 
 #include "emulator.h"
+#include "memorycontainer.h"
 
 #include <QMdiSubWindow>
 #include <QMessageBox>
@@ -54,6 +55,11 @@ namespace
         VideoInitialize();
     }
 
+    void stopEmulator()
+    {
+        MemDestroy();
+    }
+
     void uninitialiseEmulator()
     {
         HD_Destroy();
@@ -214,6 +220,8 @@ void QApple::on_actionDisk_2_triggered()
 
 void QApple::on_actionReboot_triggered()
 {
+    emit endEmulator();
+    stopEmulator();
     startEmulator();
 }
 
@@ -227,3 +235,15 @@ void QApple::timerEvent(QTimerEvent *)
 {
     on_timer();
 }
+
+void QApple::on_actionMemory_triggered()
+{
+    MemoryContainer * container = new MemoryContainer(mdiArea);
+    QMdiSubWindow * window = mdiArea->addSubWindow(container);
+
+    // need to close as it points to old memory
+    connect(this, SIGNAL(endEmulator()), window, SLOT(close()));
+
+    window->setWindowTitle("Memory viewer");
+    window->show();
+}

source/frontends/qapple/qapple.h

@@ -15,6 +15,9 @@ class QApple : public QMainWindow, private Ui::QApple
 public:
     explicit QApple(QWidget *parent = 0);
 
+signals:
+    void endEmulator();
+
 protected:
     virtual void closeEvent(QCloseEvent * event);
     virtual void timerEvent(QTimerEvent *event);
@@ -40,6 +43,8 @@ private slots:
 
     void on_timer();
 
+    void on_actionMemory_triggered();
+
 private:
 
     void stopTimer();

source/frontends/qapple/qapple.pro

@@ -17,15 +17,24 @@ SOURCES += main.cpp\
     qresources.cpp \
     emulator.cpp \
     video.cpp \
-    graphicscache.cpp
+    graphicscache.cpp \
+    chunks.cpp \
+    commands.cpp \
+    qhexedit.cpp \
+    memorycontainer.cpp
 
 HEADERS  += qapple.h \
     emulator.h \
     video.h \
-    graphicscache.h
+    graphicscache.h \
+    chunks.h \
+    commands.h \
+    qhexedit.h \
+    memorycontainer.h
 
 FORMS    += qapple.ui \
-    emulator.ui
+    emulator.ui \
+    memorycontainer.ui
 
 RESOURCES += \
     qapple.qrc

source/frontends/qapple/qapple.ui

@@ -33,12 +33,12 @@
      <x>0</x>
      <y>0</y>
      <width>1032</width>
-     <height>25</height>
+     <height>20</height>
     </rect>
    </property>
    <widget class="QMenu" name="menuSystem">
     <property name="title">
-     <string>System</string>
+     <string>S&amp;ystem</string>
     </property>
     <addaction name="actionStart"/>
     <addaction name="actionPause"/>
@@ -46,20 +46,27 @@
    </widget>
    <widget class="QMenu" name="menuDisks">
     <property name="title">
-     <string>Disks</string>
+     <string>Dis&amp;ks</string>
     </property>
     <addaction name="actionDisk_1"/>
     <addaction name="actionDisk_2"/>
    </widget>
    <widget class="QMenu" name="menuVideo">
     <property name="title">
-     <string>Video</string>
+     <string>&amp;Video</string>
     </property>
     <addaction name="actionBenchmark"/>
    </widget>
+   <widget class="QMenu" name="menuView">
+    <property name="title">
+     <string>Wi&amp;ndow</string>
+    </property>
+    <addaction name="actionMemory"/>
+   </widget>
    <addaction name="menuSystem"/>
    <addaction name="menuDisks"/>
    <addaction name="menuVideo"/>
+   <addaction name="menuView"/>
   </widget>
   <widget class="QToolBar" name="mainToolBar">
    <attribute name="toolBarArea">
@@ -75,7 +82,7 @@
   <widget class="QStatusBar" name="statusBar"/>
   <action name="actionStart">
    <property name="text">
-    <string>Start</string>
+    <string>&amp;Start</string>
    </property>
   </action>
   <action name="actionPause">
@@ -83,7 +90,7 @@
     <bool>false</bool>
    </property>
    <property name="text">
-    <string>Pause</string>
+    <string>&amp;Pause</string>
    </property>
   </action>
   <action name="action4_3">
@@ -103,22 +110,27 @@
   </action>
   <action name="actionDisk_1">
    <property name="text">
-    <string>Disk 1...</string>
+    <string>&amp;Disk 1...</string>
    </property>
   </action>
   <action name="actionDisk_2">
    <property name="text">
-    <string>Disk 2...</string>
+    <string>Disk &amp;2...</string>
    </property>
   </action>
   <action name="actionReboot">
    <property name="text">
-    <string>Reboot</string>
+    <string>&amp;Reboot</string>
    </property>
   </action>
   <action name="actionBenchmark">
    <property name="text">
-    <string>Benchmark</string>
+    <string>&amp;Benchmark</string>
+   </property>
+  </action>
+  <action name="actionMemory">
+   <property name="text">
+    <string>&amp;Memory</string>
    </property>
   </action>
  </widget>

source/frontends/qapple/qhexedit.h

@@ -0,0 +1,419 @@
+#ifndef QHEXEDIT_H
+#define QHEXEDIT_H
+
+#include <QAbstractScrollArea>
+#include <QPen>
+#include <QBrush>
+
+#include "chunks.h"
+#include "commands.h"
+
+#ifdef QHEXEDIT_EXPORTS
+#define QHEXEDIT_API Q_DECL_EXPORT
+#elif QHEXEDIT_IMPORTS
+#define QHEXEDIT_API Q_DECL_IMPORT
+#else
+#define QHEXEDIT_API
+#endif
+
+/** \mainpage
+QHexEdit is a binary editor widget for Qt.
+
+\version Version 0.8.3
+\image html qhexedit.png
+*/
+
+
+/** QHexEdit is a hex editor widget written in C++ for the Qt (Qt4, Qt5) 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 2 and 3.
+
+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.
+
+QHexEdit is based on QIODevice, that's why QHexEdit can handle big amounts of
+data. The size of edited data can be more then two gigabytes without any
+restrictions.
+*/
+class QHEXEDIT_API QHexEdit : public QAbstractScrollArea
+{
+    Q_OBJECT
+
+    /*! Property address area switch the address area on or off. Set addressArea true
+    (show it), false (hide it).
+    */
+    Q_PROPERTY(bool addressArea READ addressArea WRITE setAddressArea)
+
+    /*! 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)
+
+    /*! 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 current value.
+    */
+    Q_PROPERTY(qint64 addressOffset READ addressOffset WRITE setAddressOffset)
+
+    /*! Set and get the minimum width of the address area, width in characters.
+    */
+    Q_PROPERTY(int addressWidth READ addressWidth WRITE setAddressWidth)
+
+    /*! Switch the ascii area on (true, show it) or off (false, hide it).
+    */
+    Q_PROPERTY(bool asciiArea READ asciiArea WRITE setAsciiArea)
+
+    /*! Set and get bytes number per line.*/
+    Q_PROPERTY(int bytesPerLine READ bytesPerLine WRITE setBytesPerLine)
+
+    /*! Porperty cursorPosition sets or gets the position of the editor cursor
+    in QHexEdit. Every byte in data has to cursor positions: the lower and upper
+    Nibble. Maximum cursor position is factor two of data.size().
+    */
+    Q_PROPERTY(qint64 cursorPosition READ cursorPosition WRITE setCursorPosition)
+
+    /*! Property data holds the content of QHexEdit. Call setData() to set the
+    content of QHexEdit, data() returns the actual content. When calling setData()
+    with a QByteArray as argument, QHexEdit creates a internal copy of the data
+    If you want to edit big files please use setData(), based on QIODevice.
+    */
+    Q_PROPERTY(QByteArray data READ data WRITE setData NOTIFY dataChanged)
+
+    /*! That property defines if the hex values looks as a-f if the value is false(default)
+    or A-F if value is true.
+    */
+    Q_PROPERTY(bool hexCaps READ hexCaps WRITE setHexCaps)
+
+    /*! Property defines the dynamic calculation of bytesPerLine parameter depends of width of widget. 
+    set this property true to avoid horizontal scrollbars and show the maximal possible data. defalut value is false*/
+    Q_PROPERTY(bool dynamicBytesPerLine READ dynamicBytesPerLine WRITE setDynamicBytesPerLine)
+
+    /*! Switch the highlighting feature on or of: true (show it), false (hide it).
+    */
+    Q_PROPERTY(bool highlighting READ highlighting WRITE setHighlighting)
+
+    /*! 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)
+
+    /*! 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)
+
+    /*! 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 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);
+
+    // Access to data of qhexedit
+
+    /*! Sets the data of QHexEdit. The QIODevice will be opend just before reading
+    and closed immediately afterwards. This is to allow other programs to rewrite
+    the file while editing it.
+    */
+    bool setData(QIODevice &iODevice);
+
+    /*! Givs back the data as a QByteArray starting at position \param pos and
+    delivering \param count bytes.
+    */
+    QByteArray dataAt(qint64 pos, qint64 count=-1);
+
+    /*! Givs back the data into a \param iODevice starting at position \param pos
+    and delivering \param count bytes.
+    */
+    bool write(QIODevice &iODevice, qint64 pos=0, qint64 count=-1);
+
+
+    // Char handling
+
+    /*! Inserts a char.
+    \param pos Index position, where to insert
+    \param ch Char, which is to insert
+    The char will be inserted and size of data grows.
+    */
+    void insert(qint64 pos, char ch);
+
+    /*! Removes len bytes from the content.
+    \param pos Index position, where to remove
+    \param len Amount of bytes to remove
+    */
+    void remove(qint64 pos, qint64 len=1);
+
+    /*! Replaces a char.
+    \param pos Index position, where to overwrite
+    \param ch Char, which is to insert
+    The char will be overwritten and size remains constant.
+    */
+    void replace(qint64 pos, char ch);
+
+
+    // ByteArray handling
+
+    /*! Inserts a byte array.
+    \param pos Index position, where to insert
+    \param ba QByteArray, which is to insert
+    The QByteArray will be inserted and size of data grows.
+    */
+    void insert(qint64 pos, const QByteArray &ba);
+
+    /*! Replaces \param len bytes with a byte array \param ba
+    \param pos Index position, where to overwrite
+    \param ba QByteArray, which is inserted
+    \param len count of bytes to overwrite
+    The data is overwritten and size of data may change.
+    */
+    void replace(qint64 pos, qint64 len, const QByteArray &ba);
+
+
+    // Utility functioins
+    /*! Calc cursor position from graphics position
+     * \param point from where the cursor position should be calculated
+     * \return Cursor postioin
+     */
+    qint64 cursorPosition(QPoint point);
+
+    /*! Ensure the cursor to be visble
+     */
+    void ensureVisible();
+
+    /*! Find first occurence of ba in QHexEdit data
+     * \param ba Data to find
+     * \param from Point where the search starts
+     * \return pos if fond, else -1
+     */
+    qint64 indexOf(const QByteArray &ba, qint64 from);
+
+    /*! Returns if any changes where done on document
+     * \return true when document is modified else false
+     */
+    bool isModified();
+
+    /*! Find last occurence of ba in QHexEdit data
+     * \param ba Data to find
+     * \param from Point where the search starts
+     * \return pos if fond, else -1
+     */
+    qint64 lastIndexOf(const QByteArray &ba, qint64 from);
+
+    /*! Gives back a formatted image of the selected content of QHexEdit
+    */
+    QString selectionToReadableString();
+
+    /*! Set Font of QHexEdit
+     * \param font
+     */
+    void setFont(const QFont &font);
+
+    /*! Gives back a formatted image of the content of QHexEdit
+    */
+    QString toReadableString();
+
+
+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();
+
+    /*! 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(qint64 address);
+
+    /*! Contains the size of the data to edit. */
+    void currentSizeChanged(qint64 size);
+
+    /*! The signal is emitted every time, the data is changed. */
+    void dataChanged();
+
+    /*! The signal is emitted every time, the overwrite mode is changed. */
+    void overwriteModeChanged(bool state);
+
+
+/*! \cond docNever */
+public:
+    ~QHexEdit();
+
+    // Properties
+    bool addressArea();
+    void setAddressArea(bool addressArea);
+
+    QColor addressAreaColor();
+    void setAddressAreaColor(const QColor &color);
+
+    qint64 addressOffset();
+    void setAddressOffset(qint64 addressArea);
+
+    int addressWidth();
+    void setAddressWidth(int addressWidth);
+
+    bool asciiArea();
+    void setAsciiArea(bool asciiArea);
+
+    int bytesPerLine();
+    void setBytesPerLine(int count);
+
+    qint64 cursorPosition();
+    void setCursorPosition(qint64 position);
+
+    QByteArray data();
+    void setData(const QByteArray &ba);
+
+    void setHexCaps(const bool isCaps);
+    bool hexCaps();
+
+    void setDynamicBytesPerLine(const bool isDynamic);
+    bool dynamicBytesPerLine();
+
+    bool highlighting();
+    void setHighlighting(bool mode);
+
+    QColor highlightingColor();
+    void setHighlightingColor(const QColor &color);
+
+    bool overwriteMode();
+    void setOverwriteMode(bool overwriteMode);
+
+    bool isReadOnly();
+    void setReadOnly(bool readOnly);
+
+    QColor selectionColor();
+    void setSelectionColor(const QColor &color);
+
+protected:
+    // Handle events
+    void keyPressEvent(QKeyEvent *event);
+    void mouseMoveEvent(QMouseEvent * event);
+    void mousePressEvent(QMouseEvent * event);
+    void paintEvent(QPaintEvent *event);
+    void resizeEvent(QResizeEvent *);
+    virtual bool focusNextPrevChild(bool next);
+private:
+    // Handle selections
+    void resetSelection(qint64 pos);            // set selectionStart and selectionEnd to pos
+    void resetSelection();                      // set selectionEnd to selectionStart
+    void setSelection(qint64 pos);              // set min (if below init) or max (if greater init)
+    int getSelectionBegin();
+    int getSelectionEnd();
+
+    // Private utility functions
+    void init();
+    void readBuffers();
+    QString toReadable(const QByteArray &ba);
+
+private slots:
+    void adjust();                              // recalc pixel positions
+    void dataChangedPrivate(int idx=0);        // emit dataChanged() signal
+    void refresh();                             // ensureVisible() and readBuffers()
+    void updateCursor();                        // update blinking cursor
+
+private:
+    // Name convention: pixel positions start with _px
+    int _pxCharWidth, _pxCharHeight;            // char dimensions (dpendend on font)
+    int _pxPosHexX;                             // X-Pos of HeaxArea
+    int _pxPosAdrX;                             // X-Pos of Address Area
+    int _pxPosAsciiX;                           // X-Pos of Ascii Area
+    int _pxGapAdr;                              // gap left from AddressArea
+    int _pxGapAdrHex;                           // gap between AddressArea and HexAerea
+    int _pxGapHexAscii;                         // gap between HexArea and AsciiArea
+    int _pxCursorWidth;                         // cursor width
+    int _pxSelectionSub;                        // offset selection rect
+    int _pxCursorX;                             // current cursor pos
+    int _pxCursorY;                             // current cursor pos
+
+    // Name convention: absolute byte positions in chunks start with _b
+    qint64 _bSelectionBegin;                    // first position of Selection
+    qint64 _bSelectionEnd;                      // end of Selection
+    qint64 _bSelectionInit;                     // memory position of Selection
+    qint64 _bPosFirst;                          // position of first byte shown
+    qint64 _bPosLast;                           // position of last byte shown
+    qint64 _bPosCurrent;                        // current position
+
+    // variables to store the property values
+    bool _addressArea;                          // left area of QHexEdit
+    QColor _addressAreaColor;
+    int _addressWidth;
+    bool _asciiArea;
+    qint64 _addressOffset;
+    int _bytesPerLine;
+    int _hexCharsInLine;
+    bool _highlighting;
+    bool _overwriteMode;
+    QBrush _brushSelection;
+    QPen _penSelection;
+    QBrush _brushHighlighted;
+    QPen _penHighlighted;
+    bool _readOnly;
+    bool _hexCaps;
+    bool _dynamicBytesPerLine;
+
+    // other variables
+    bool _editAreaIsAscii;                      // flag about the ascii mode edited
+    int _addrDigits;                            // real no of addressdigits, may be > addressWidth
+    bool _blink;                                // help get cursor blinking
+    QBuffer _bData;                             // buffer, when setup with QByteArray
+    Chunks *_chunks;                            // IODevice based access to data
+    QTimer _cursorTimer;                        // for blinking cursor
+    qint64 _cursorPosition;                     // absolute positioin of cursor, 1 Byte == 2 tics
+    QRect _cursorRect;                          // physical dimensions of cursor
+    QByteArray _data;                           // QHexEdit's data, when setup with QByteArray
+    QByteArray _dataShown;                      // data in the current View
+    QByteArray _hexDataShown;                   // data in view, transformed to hex
+    qint64 _lastEventSize;                      // size, which was emitted last time
+    QByteArray _markedShown;                    // marked data in view
+    bool _modified;                             // Is any data in editor modified?
+    int _rowsShown;                             // lines of text shown
+    UndoStack * _undoStack;                     // Stack to store edit actions for undo/redo
+    /*! \endcond docNever */
+};
+
+#endif // QHEXEDIT_H