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objects.cpp Example File
^{activeqt/hierarchy/objects.cpp}

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    **
    ** Copyright (C) 1992-2005 Trolltech AS. All rights reserved.
    **
    ** This file is part of the documentation of the Qt Toolkit.
    **
    ** This file may be used under the terms of the GNU General Public
    ** License version 2.0 as published by the Free Software Foundation
    ** and appearing in the file LICENSE.GPL included in the packaging of
    ** this file.  Please review the following information to ensure GNU
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    ** review the following information:
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    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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    #include "objects.h"
    #include <QLayout>
    #include <QPainter>

    /* Implementation of QParentWidget */
    QParentWidget::QParentWidget(QWidget *parent)
    : QWidget(parent)
    {
        vbox = new QVBoxLayout(this);
    }

    void QParentWidget::createSubWidget(const QString &name)
    {
        QSubWidget *sw = new QSubWidget(this, name);
        vbox->addWidget(sw);
        sw->setLabel(name);
        sw->show();
    }

    QSubWidget *QParentWidget::subWidget(const QString &name)
    {
        return qFindChild<QSubWidget*>(this, name);
    }

    QSize QParentWidget::sizeHint() const
    {
        return QWidget::sizeHint().expandedTo(QSize(100, 100));
    }

    /* Implementation of QSubWidget */
    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);
    }