sortfilterproxymodel.cpp Example File | Qt Quick Controls 5.4

- Qt 5.4
- Qt Quick Controls
- Qt Quick Controls - Table View Example
- sortfilterproxymodel.cpp Example File
- Qt 5.4.2 Reference Documentation

# sortfilterproxymodel.cpp Example File

tableview/src/sortfilterproxymodel.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
    ** Contact: http://www.qt-project.org/legal
    **
    ** This file is part of the Qt Quick Controls module of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
    ** You may use this file under the terms of the BSD license as follows:
    **
    ** "Redistribution and use in source and binary forms, with or without
    ** modification, are permitted provided that the following conditions are
    ** met:
    **   * Redistributions of source code must retain the above copyright
    **     notice, this list of conditions and the following disclaimer.
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    **     notice, this list of conditions and the following disclaimer in
    **     the documentation and/or other materials provided with the
    **     distribution.
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    **     of its contributors may be used to endorse or promote products derived
    **     from this software without specific prior written permission.
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    #include "sortfilterproxymodel.h"
    #include <QtDebug>
    #include <QtQml>

    SortFilterProxyModel::SortFilterProxyModel(QObject *parent) : QSortFilterProxyModel(parent), m_complete(false)
    {
        connect(this, SIGNAL(rowsInserted(QModelIndex,int,int)), this, SIGNAL(countChanged()));
        connect(this, SIGNAL(rowsRemoved(QModelIndex,int,int)), this, SIGNAL(countChanged()));
    }

    int SortFilterProxyModel::count() const
    {
        return rowCount();
    }

    QObject *SortFilterProxyModel::source() const
    {
        return sourceModel();
    }

    void SortFilterProxyModel::setSource(QObject *source)
    {
        setSourceModel(qobject_cast<QAbstractItemModel *>(source));
    }

    QByteArray SortFilterProxyModel::sortRole() const
    {
        return m_sortRole;
    }

    void SortFilterProxyModel::setSortRole(const QByteArray &role)
    {
        if (m_sortRole != role) {
            m_sortRole = role;
            if (m_complete)
                QSortFilterProxyModel::setSortRole(roleKey(role));
        }
    }

    void SortFilterProxyModel::setSortOrder(Qt::SortOrder order)
    {
        QSortFilterProxyModel::sort(0, order);
    }

    QByteArray SortFilterProxyModel::filterRole() const
    {
        return m_filterRole;
    }

    void SortFilterProxyModel::setFilterRole(const QByteArray &role)
    {
        if (m_filterRole != role) {
            m_filterRole = role;
            if (m_complete)
                QSortFilterProxyModel::setFilterRole(roleKey(role));
        }
    }

    QString SortFilterProxyModel::filterString() const
    {
        return filterRegExp().pattern();
    }

    void SortFilterProxyModel::setFilterString(const QString &filter)
    {
        setFilterRegExp(QRegExp(filter, filterCaseSensitivity(), static_cast<QRegExp::PatternSyntax>(filterSyntax())));
    }

    SortFilterProxyModel::FilterSyntax SortFilterProxyModel::filterSyntax() const
    {
        return static_cast<FilterSyntax>(filterRegExp().patternSyntax());
    }

    void SortFilterProxyModel::setFilterSyntax(SortFilterProxyModel::FilterSyntax syntax)
    {
        setFilterRegExp(QRegExp(filterString(), filterCaseSensitivity(), static_cast<QRegExp::PatternSyntax>(syntax)));
    }

    QJSValue SortFilterProxyModel::get(int idx) const
    {
        QJSEngine *engine = qmlEngine(this);
        QJSValue value = engine->newObject();
        if (idx >= 0 && idx < count()) {
            QHash<int, QByteArray> roles = roleNames();
            QHashIterator<int, QByteArray> it(roles);
            while (it.hasNext()) {
                it.next();
                value.setProperty(QString::fromUtf8(it.value()), data(index(idx, 0), it.key()).toString());
            }
        }
        return value;
    }

    void SortFilterProxyModel::classBegin()
    {
    }

    void SortFilterProxyModel::componentComplete()
    {
        m_complete = true;
        if (!m_sortRole.isEmpty())
            QSortFilterProxyModel::setSortRole(roleKey(m_sortRole));
        if (!m_filterRole.isEmpty())
            QSortFilterProxyModel::setFilterRole(roleKey(m_filterRole));
    }

    int SortFilterProxyModel::roleKey(const QByteArray &role) const
    {
        QHash<int, QByteArray> roles = roleNames();
        QHashIterator<int, QByteArray> it(roles);
        while (it.hasNext()) {
            it.next();
            if (it.value() == role)
                return it.key();
        }
        return -1;
    }

    QHash<int, QByteArray> SortFilterProxyModel::roleNames() const
    {
        if (QAbstractItemModel *source = sourceModel())
            return source->roleNames();
        return QHash<int, QByteArray>();
    }

    bool SortFilterProxyModel::filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const
    {
        QRegExp rx = filterRegExp();
        if (rx.isEmpty())
            return true;
        QAbstractItemModel *model = sourceModel();
        if (filterRole().isEmpty()) {
            QHash<int, QByteArray> roles = roleNames();
            QHashIterator<int, QByteArray> it(roles);
            while (it.hasNext()) {
                it.next();
                QModelIndex sourceIndex = model->index(sourceRow, 0, sourceParent);
                QString key = model->data(sourceIndex, it.key()).toString();
                if (key.contains(rx))
                    return true;
            }
            return false;
        }
        QModelIndex sourceIndex = model->index(sourceRow, 0, sourceParent);
        if (!sourceIndex.isValid())
            return true;
        QString key = model->data(sourceIndex, roleKey(filterRole())).toString();
        return key.contains(rx);
    }