#include <QObject>
#include <QtGui/QApplication>
#include <QMainWindow>
#include <QMdiArea>
#include <QMdiSubWindow>
#include <QPushButton>
#include <QHBoxLayout>
#include <QTextBrowser>

class View: public QWidget{
    Q_OBJECT
public:
    View(QWidget *parent=0): QWidget(parent){
        QVBoxLayout *vlayout=new QVBoxLayout(this);
        QHBoxLayout *layout=new QHBoxLayout(this);
        vlayout->addLayout(layout);
        __storeButton=new QPushButton(tr("  Store"),this);
        restoreButton=new QPushButton(tr("Restore"),this);

        layout->addWidget(__storeButton);
        layout->addWidget(restoreButton);
        connect(__storeButton,SIGNAL(clicked()),SLOT(  store()));
        connect(restoreButton,SIGNAL(clicked()),SLOT(restore()));

        textBrowser=new QTextBrowser(this);

        textBrowser->setLineWrapMode(QTextEdit::NoWrap);
        QFont font("Courier");
        font.setStyleHint(QFont::TypeWriter);
        textBrowser->setFont(font);

        vlayout->addWidget(textBrowser);
    }
public slots:
    void store(){
        buf=sub()->saveGeometry();
        restoreButton->setEnabled( !buf.isEmpty() );
        updateText();
    }
    void restore(){
        sub()->restoreGeometry(buf);
    }
    void updateText(){
        const int max=8;
        int newLine;
        int i,j;
        newLine=1;
        QString text;

        for(i=0;i<buf.length();i++){
            if(i!=0) text.append("\n");
            text.append("  ");
            for(j=0;j<max;j++){
                if(i+j<buf.length()) {
                    text.append( tr("%1 ").arg((int)(unsigned char)buf.data()[i+j],2,16,QChar('0')) );
                }else{
                    text.append("   ");
                }
            }
            for(j=0;j<max;j++){
                if(i+j>=buf.length()) break;
                //text.append( buf.data()[i+j]>32?buf.data()[i+j]:' ');
            }
            i+=max;
        }
        textBrowser->setText(text);

    }

protected:
    inline QMdiSubWindow *sub(){
        QMdiSubWindow *sub=qobject_cast<QMdiSubWindow *>( parent() );
        Q_ASSERT(sub);
        return sub;
    }

    QByteArray buf;
    QPushButton *__storeButton;
    QPushButton *restoreButton;
    QTextBrowser *textBrowser;
};

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QMainWindow main;
    QMdiArea mdiArea(&main);
    mdiArea.setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
    mdiArea.setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
    main.setCentralWidget(&mdiArea);
    main.resize(400,300);
    QMdiSubWindow sub(&mdiArea);
    mdiArea.addSubWindow(&sub);

    View view(&mdiArea);
    sub.setWidget(&view);

    //sub.setGeometry(QRect(30,50,200,100));

    main.show();
    return a.exec();
}

#include "moc_main.cpp"