variantdelegate.h

QT 开发环境里面一个很重要的文件

/****************************************************************************
**
** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes 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
** this file.  Please review the following information to ensure GNU
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** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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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