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# delegate.h Example File
itemviews/spinboxdelegate/delegate.h

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        #ifndef DELEGATE_H
        #define DELEGATE_H

        #include <QItemDelegate>
        #include <QModelIndex>
        #include <QObject>
        #include <QSize>
        #include <QSpinBox>

        class SpinBoxDelegate : public QItemDelegate
        {
            Q_OBJECT

        public:
            SpinBoxDelegate(QObject *parent = 0);

            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;

            void updateEditorGeometry(QWidget *editor,
                const QStyleOptionViewItem &option, const QModelIndex &index) const;
        };

        #endif