c590aa678d
Cleanup the SimpleTreeModel example: - include own headers first - use nullptr - add sanity checks Change-Id: If57d608e3919368b2022ff86aede8de9c2ba7369 Reviewed-by: Luca Beldi <v.ronin@yahoo.it> Reviewed-by: Sze Howe Koh <szehowe.koh@gmail.com>
127 lines
3.5 KiB
C++
127 lines
3.5 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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/*
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treeitem.cpp
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A container for items of data supplied by the simple tree model.
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*/
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#include "treeitem.h"
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//! [0]
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TreeItem::TreeItem(const QVector<QVariant> &data, TreeItem *parent)
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: m_itemData(data), m_parentItem(parent)
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{}
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//! [0]
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//! [1]
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TreeItem::~TreeItem()
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{
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qDeleteAll(m_childItems);
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}
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//! [1]
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//! [2]
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void TreeItem::appendChild(TreeItem *item)
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{
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m_childItems.append(item);
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}
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//! [2]
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//! [3]
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TreeItem *TreeItem::child(int row)
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{
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if (row < 0 || row >= m_childItems.size())
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return nullptr;
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return m_childItems.at(row);
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}
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//! [3]
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//! [4]
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int TreeItem::childCount() const
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{
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return m_childItems.count();
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}
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//! [4]
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//! [5]
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int TreeItem::columnCount() const
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{
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return m_itemData.count();
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}
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//! [5]
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//! [6]
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QVariant TreeItem::data(int column) const
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{
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if (column < 0 || column >= m_itemData.size())
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return QVariant();
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return m_itemData.at(column);
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}
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//! [6]
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//! [7]
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TreeItem *TreeItem::parentItem()
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{
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return m_parentItem;
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}
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//! [7]
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//! [8]
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int TreeItem::row() const
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{
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if (m_parentItem)
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return m_parentItem->m_childItems.indexOf(const_cast<TreeItem*>(this));
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return 0;
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}
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//! [8]
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