diff options
Diffstat (limited to 'examples/corelib/tools/contiguouscache/randomlistmodel.cpp')
-rw-r--r-- | examples/corelib/tools/contiguouscache/randomlistmodel.cpp | 71 |
1 files changed, 10 insertions, 61 deletions
diff --git a/examples/corelib/tools/contiguouscache/randomlistmodel.cpp b/examples/corelib/tools/contiguouscache/randomlistmodel.cpp index d028b896f2..4832f0ae24 100644 --- a/examples/corelib/tools/contiguouscache/randomlistmodel.cpp +++ b/examples/corelib/tools/contiguouscache/randomlistmodel.cpp @@ -1,65 +1,14 @@ -/**************************************************************************** -** -** 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." -** -** $QT_END_LICENSE$ -** -****************************************************************************/ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause #include "randomlistmodel.h" #include <QRandomGenerator> -static const int bufferSize(500); -static const int lookAhead(100); -static const int halfLookAhead(lookAhead/2); +static constexpr int bufferSize(500); +static constexpr int lookAhead(100); +static constexpr int halfLookAhead(lookAhead / 2); RandomListModel::RandomListModel(QObject *parent) -: QAbstractListModel(parent), m_rows(bufferSize), m_count(10000) -{ -} - -RandomListModel::~RandomListModel() + : QAbstractListModel(parent), m_rows(bufferSize), m_count(10000) { } @@ -78,14 +27,14 @@ QVariant RandomListModel::data(const QModelIndex &index, int role) const if (row > m_rows.lastIndex()) { if (row - m_rows.lastIndex() > lookAhead) - cacheRows(row-halfLookAhead, qMin(m_count, row+halfLookAhead)); + cacheRows(row - halfLookAhead, qMin(m_count, row + halfLookAhead)); else while (row > m_rows.lastIndex()) - m_rows.append(fetchRow(m_rows.lastIndex()+1)); + m_rows.append(fetchRow(m_rows.lastIndex() + 1)); } else if (row < m_rows.firstIndex()) { if (m_rows.firstIndex() - row > lookAhead) - cacheRows(qMax(0, row-halfLookAhead), row+halfLookAhead); + cacheRows(qMax(0, row - halfLookAhead), row + halfLookAhead); else while (row < m_rows.firstIndex()) - m_rows.prepend(fetchRow(m_rows.firstIndex()-1)); + m_rows.prepend(fetchRow(m_rows.firstIndex() - 1)); } return m_rows.at(row); |