////////////////////////////////////////////////////////////////////////////////////////
//
//  Copyright 2026 OVITO GmbH, Germany
//
//  This file is part of OVITO (Open Visualization Tool).
//
//  OVITO is free software; you can redistribute it and/or modify it either under the
//  terms of the GNU General Public License version 3 as published by the Free Software
//  Foundation (the "GPL") or, at your option, under the terms of the MIT License.
//  If you do not alter this notice, a recipient may use your version of this
//  file under either the GPL or the MIT License.
//
//  You should have received a copy of the GPL along with this program in a
//  file LICENSE.GPL.txt.  You should have received a copy of the MIT License along
//  with this program in a file LICENSE.MIT.txt
//
//  This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND,
//  either express or implied. See the GPL or the MIT License for the specific language
//  governing rights and limitations.
//
////////////////////////////////////////////////////////////////////////////////////////

#pragma once


#include <ovito/core/Core.h>
#include <ovito/core/dataset/data/DataObject.h>
#include <ovito/core/dataset/pipeline/PipelineNode.h>

namespace Ovito {

/**
 * \brief A data object holding a primitive value (e.g. a number or a string).
 */
class OVITO_CORE_EXPORT AttributeDataObject : public DataObject
{
    OVITO_CLASS(AttributeDataObject)

public:

    /// Constructor.
    void initializeObject(ObjectInitializationFlags flags) { DataObject::initializeObject(flags); }

    /// Constructor.
    void initializeObject(ObjectInitializationFlags flags, QVariant&& value) {
        DataObject::initializeObject(flags);
        _value.mutableValue() = std::move(value);
    }

    /// Returns the display title of this object.
    virtual QString objectTitle() const override {
        if(!identifier().isEmpty())
            return identifier();
        return DataObject::objectTitle();
    }

protected:

    /// Loads the class' contents from the given stream.
    virtual void loadFromStream(ObjectLoadStream& stream) override;

private:

    /// The attribute's value.
    DECLARE_MODIFIABLE_PROPERTY_FIELD_FLAGS(QVariant{}, value, setValue, PROPERTY_FIELD_WAS_RUNTIME_PROPERTY_FIELD);
};

}   // End of namespace
