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# iconsizespinbox.cpp Example File
widgets/icons/iconsizespinbox.cpp

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        **
        ** This file is part of the documentation of the Qt Toolkit.
        **
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    ** License version 2.0 as published by the Free Software Foundation
    ** and appearing in the file LICENSE.GPL included in the packaging of
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        #include <QtGui>

        #include "iconsizespinbox.h"

        IconSizeSpinBox::IconSizeSpinBox(QWidget *parent)
            : QSpinBox(parent)
        {
        }

        int IconSizeSpinBox::valueFromText(const QString &text) const
        {
            QRegExp regExp(tr("(\\d+)(\\s*[xx]\\s*\\d+)?"));

            if (regExp.exactMatch(text)) {
                return regExp.cap(1).toInt();
            } else {
                return 0;
            }
        }

        QString IconSizeSpinBox::textFromValue(int value) const
        {
            return tr("%1 x %1").arg(value);
        }