SessionItemData.cpp

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//  ************************************************************************************************
//
//  BornAgain: simulate and fit reflection and scattering
//
//! @file      GUI/Support/Data/SessionItemData.cpp
//! @brief     Implements class SessionItemData
//!
//! @homepage  http://www.bornagainproject.org
//! @license   GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors   Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
//  ************************************************************************************************
 
#include "GUI/Support/Data/SessionItemData.h"
 
#include "GUI/Support/Type/VariantUtil.h"
#include <utility>
 
SessionItemData::ItemData::ItemData(int r, QVariant v)
    : role(r)
    , data(std::move(v))
{
}
 
bool SessionItemData::ItemData::operator==(const SessionItemData::ItemData& other) const
{
    return role == other.role && GUI::Util::Variant::IsTheSame(data, other.data);
}
 
QVector<int> SessionItemData::roles() const
{
    QVector<int> result;
    for (const auto& value : m_values)
        result.push_back(value.role);
    return result;
}
 
QVariant SessionItemData::data(int role) const
{
    role = (role == Qt::EditRole) ? Qt::DisplayRole : role;
    for (const auto& value : m_values) {
        if (value.role == role)
            return value.data;
    }
    return QVariant();
}
 
//! Sets the data for given role. Returns true if data was changed.
 
bool SessionItemData::setData(int role, const QVariant& value)
{
    role = (role == Qt::EditRole) ? Qt::DisplayRole : role;
    for (auto* it = m_values.begin(); it != m_values.end(); ++it) {
        if (it->role == role) {
            if (value.isValid()) {
                if (GUI::Util::Variant::IsTheSame(it->data, value))
                    return false;
                it->data = value;
            } else {
                m_values.erase(it);
            }
            return true;
        }
    }
    m_values.push_back(ItemData(role, value));
    return true;
}