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# variantdelegate.h Example File
tools/settingseditor/variantdelegate.h

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     #ifndef VARIANTDELEGATE_H
     #define VARIANTDELEGATE_H

     #include <QItemDelegate>
     #include <QRegExp>

     class VariantDelegate : public QItemDelegate
     {
         Q_OBJECT

     public:
         VariantDelegate(QObject *parent = 0);

         void paint(QPainter *painter, const QStyleOptionViewItem &option,
                    const QModelIndex &index) const;
         QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option,
                               const QModelIndex &index) const;
         void setEditorData(QWidget *editor, const QModelIndex &index) const;
         void setModelData(QWidget *editor, QAbstractItemModel *model,
                           const QModelIndex &index) const;

         static bool isSupportedType(QVariant::Type type);
         static QString displayText(const QVariant &value);

     private:
         mutable QRegExp boolExp;
         mutable QRegExp byteArrayExp;
         mutable QRegExp charExp;
         mutable QRegExp colorExp;
         mutable QRegExp dateExp;
         mutable QRegExp dateTimeExp;
         mutable QRegExp doubleExp;
         mutable QRegExp pointExp;
         mutable QRegExp rectExp;
         mutable QRegExp signedIntegerExp;
         mutable QRegExp sizeExp;
         mutable QRegExp timeExp;
         mutable QRegExp unsignedIntegerExp;
     };

     #endif