qt-everywhere-src-5.15.1/qtbase/examples/widgets/tools/settingseditor/variantdelegate.h

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#ifndef VARIANTDELEGATE_H
#define VARIANTDELEGATE_H

#include <QStyledItemDelegate>
#include <QRegularExpression>

class VariantDelegate : public QStyledItemDelegate
{
    Q_OBJECT

public:
    VariantDelegate(QObject *parent = nullptr);

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

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

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

#endif