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#include <QtTest/QtTest>

#include <QTextEdit>

#include <QLineEdit>

#include <QVBoxLayout>

#include <QFontDialog>

#include <QPushButton>

#define private public

#include <qfont.h>

#include <private/qtextengine_p.h>

#include <private/qfontengine_p.h>

#include <qtextlayout.h>

#undef private

class MyEdit : public QTextEdit {

    Q_OBJECT

public:

    MyEdit(QWidget *p) : QTextEdit(p) { setReadOnly(true); }

public slots:

    void setText(const QString &str);

    void changeFont();

public:

    QLineEdit *lineEdit;

};

void MyEdit::setText(const QString &str)

{

    if (str.isEmpty()) {

        clear();

        return;

    }

    QTextLayout layout(str, lineEdit->font());

    QTextEngine *e = layout.d;

    e->itemize();

    e->shape(0);

    QString result;

    result = "Using font '" + e->fontEngine(e->layoutData->items[0])->fontDef.family + "'\n\n";

    result += "{ { ";

    for (int i = 0; i < str.length(); ++i) 

        result += "0x" + QString::number(str.at(i).unicode(), 16) + ", ";

    result += "0x0 },\n  { ";

    for (int i = 0; i < e->layoutData->items[0].num_glyphs; ++i)

	result += "0x" + QString::number(e->layoutData->glyphPtr[i].glyph, 16) + ", ";

    result += "0x0 } }";

    setPlainText(result);

}

void MyEdit::changeFont()

{

    bool ok;

    QFont f = QFontDialog::getFont(&ok, lineEdit->font(), topLevelWidget());

    if (ok)

        lineEdit->setFont(f);

}

int main(int argc,  char **argv)

{

    QApplication a(argc, argv);

    QWidget *mw = new QWidget(0);

    QVBoxLayout *l = new QVBoxLayout(mw);

    QLineEdit *le = new QLineEdit(mw);

    l->addWidget(le);

    MyEdit *view = new MyEdit(mw);

    view->lineEdit = le;

    l->addWidget(view);

    QPushButton *button = new QPushButton("Change Font", mw);

    l->addWidget(button);

    QObject::connect(le, SIGNAL(textChanged(QString)), view, SLOT(setText(QString)));

    QObject::connect(button, SIGNAL(clicked()), view, SLOT(changeFont()));

    mw->resize(500, 300);

    mw->show();

    return a.exec();

}

#include <main.moc>