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

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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);
 }