sortfilterproxymodel.cpp Example File | Qt Quick Controls 1 5.12.5

Qt 5.12 | Qt Quick Controls 1 | Qt Quick Controls 1 - Table View Example | sortfilterproxymodel.cpp Example File

Qt 5.12.5 Reference Documentation

# sortfilterproxymodel.cpp Example File

tableview/src/sortfilterproxymodel.cpp

      /****************************************************************************
      **
      ** Copyright (C) 2016 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
      **
      ** This file is part of the examples of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:BSD$
      ** Commercial License Usage
      ** Licensees holding valid commercial Qt licenses may use this file in
      ** accordance with the commercial license agreement provided with the
      ** Software or, alternatively, in accordance with the terms contained in
      ** a written agreement between you and The Qt Company. For licensing terms
      ** and conditions see https://www.qt.io/terms-conditions. For further
      ** information use the contact form at https://www.qt.io/contact-us.
      **
      ** BSD License Usage
      ** Alternatively, 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.
      **   * Redistributions in binary form must reproduce the above copyright
      **     notice, this list of conditions and the following disclaimer in
      **     the documentation and/or other materials provided with the
      **     distribution.
      **   * Neither the name of The Qt Company Ltd nor the names of its
      **     contributors may be used to endorse or promote products derived
      **     from this software without specific prior written permission.
      **
      **
      ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
      ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
      ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
      ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
      **
      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      #include "sortfilterproxymodel.h"
      #include <QtDebug>
      #include <QtQml>

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