propertyinfo.h

/*
    This file is part of the KFileMetaData project
    SPDX-FileCopyrightText: 2014 Vishesh Handa <me@vhanda.in>
 
    SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
*/
 
#ifndef _KFILEMETADATA_PROPERTYINFO_H
#define _KFILEMETADATA_PROPERTYINFO_H
 
#include <QString>
#include <QVariant>
#include "properties.h"
#include "kfilemetadata_export.h"
 
namespace KFileMetaData {
 
class PropertyInfoData;
/**
 * \class PropertyInfo propertyinfo.h <KFileMetaData/PropertyInfo>
 *
 * \brief The PropertyInfo class can be used to obtain extra information
 * about any property.
 *
 * It is commonly used be indexers in order
 * to obtain a translatable name of the property along with
 * additional information such as if the property should be indexed.
 */
class KFILEMETADATA_EXPORT PropertyInfo
{
public:
    PropertyInfo();
    PropertyInfo(Property::Property property);
    PropertyInfo(const PropertyInfo& pi);
    ~PropertyInfo();
 
    PropertyInfo& operator=(const PropertyInfo& rhs);
    bool operator==(const PropertyInfo& rhs) const;
 
    /**
     * The enumeration which represents this property
     */
    Property::Property property() const;
 
    /**
     * The internal unique name used to refer to the property
     */
    QString name() const;
 
    /**
     * A user visible name of the property
     *
     * Note: When the displayName for a given property is used repeatedly
     * the returned value should be cached, as calling this method is
     * fairly expensive, as the returned name is localized.
     */
    QString displayName() const;
 
    /**
     * The type the value of this property should be.
     * Eg - Property::Height should be an integer
     */
    QMetaType::Type valueType() const;
 
    /**
     * Indicates if this property requires indexing or should just be stored.
     * Eg - Property::Height does not need to be part of the global index.
     *      When a user searches for 600, they should not get images with
     *      that height
     *
     * This is just a recommendation.
     */
    bool shouldBeIndexed() const;
 
    /**
     * Construct a PropertyInfo from the internal property name.
     * The internal property name is case insensitive
     */
    static PropertyInfo fromName(const QString& name);
 
    /**
     * Get the names of all valid, supported properties
     *
     * Note: Property::Empty is not considered a valid property.
     *
     * @since 6.0
     * @since 5.107
     */
    static QStringList allNames();
 
    /**
     * Returns the value of the property as a QString with added formatting,
     * added units if needed, and translated enums.
     * @since 5.56
     */
    QString formatAsDisplayString(const QVariant& value) const;
 
private:
    const PropertyInfoData* d;
};
 
} // namespace
Q_DECLARE_METATYPE(KFileMetaData::PropertyInfo)
 
 
#endif // _KFILEMETADATA_PROPERTYINFO_H