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#include "objects.h"

#include <QLayout>

#include <QPainter>

/* Implementation of QParentWidget */

//! [0]

QParentWidget::QParentWidget(QWidget *parent)

: QWidget(parent)

{

    vbox = new QVBoxLayout(this);    

}

//! [0] //! [1]

void QParentWidget::createSubWidget(const QString &name)

{

    QSubWidget *sw = new QSubWidget(this, name);

    vbox->addWidget(sw);

    sw->setLabel(name);

    sw->show();

}

//! [1] //! [2]

QSubWidget *QParentWidget::subWidget(const QString &name)

{

    return qFindChild<QSubWidget*>(this, name);

}

//! [2]

QSize QParentWidget::sizeHint() const

{

    return QWidget::sizeHint().expandedTo(QSize(100, 100));

}

/* Implementation of QSubWidget */

//! [3]

QSubWidget::QSubWidget(QWidget *parent, const QString &name)

: QWidget(parent)

{

    setObjectName(name);

}

void QSubWidget::setLabel(const QString &text)

{

    lbl = text;

    setObjectName(text);

    update();

}

QString QSubWidget::label() const

{

    return lbl;

}

QSize QSubWidget::sizeHint() const

{

    QFontMetrics fm(font());

    return QSize(fm.width(lbl), fm.height());

}

void QSubWidget::paintEvent(QPaintEvent *)

{

    QPainter painter(this);

    painter.setPen(palette().text().color());

    painter.drawText(rect(), Qt::AlignCenter, lbl);

//! [3] //! [4]

}

//! [4]