cd46a2daf5
Update files using old header.LGPL3 to header.LGPL Update files using old FDL template to use new one Update files using old BSD template to use new one Change-Id: I36a78272516f9953d02956522f285b40adfc8915 Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
298 lines
8.6 KiB
C++
298 lines
8.6 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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** and conditions see https://www.qt.io/terms-conditions. For further
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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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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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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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#include <QtWidgets>
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#include "treeitem.h"
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#include "treemodel.h"
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//! [0]
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TreeModel::TreeModel(const QStringList &headers, const QString &data, QObject *parent)
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: QAbstractItemModel(parent)
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{
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QVector<QVariant> rootData;
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foreach (QString header, headers)
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rootData << header;
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rootItem = new TreeItem(rootData);
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setupModelData(data.split(QString("\n")), rootItem);
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}
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//! [0]
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//! [1]
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TreeModel::~TreeModel()
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{
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delete rootItem;
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}
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//! [1]
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//! [2]
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int TreeModel::columnCount(const QModelIndex & /* parent */) const
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{
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return rootItem->columnCount();
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}
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//! [2]
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QVariant TreeModel::data(const QModelIndex &index, int role) const
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{
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if (!index.isValid())
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return QVariant();
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if (role != Qt::DisplayRole && role != Qt::EditRole)
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return QVariant();
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TreeItem *item = getItem(index);
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return item->data(index.column());
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}
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//! [3]
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Qt::ItemFlags TreeModel::flags(const QModelIndex &index) const
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{
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if (!index.isValid())
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return 0;
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return Qt::ItemIsEditable | QAbstractItemModel::flags(index);
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}
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//! [3]
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//! [4]
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TreeItem *TreeModel::getItem(const QModelIndex &index) const
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{
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if (index.isValid()) {
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TreeItem *item = static_cast<TreeItem*>(index.internalPointer());
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if (item)
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return item;
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}
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return rootItem;
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}
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//! [4]
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QVariant TreeModel::headerData(int section, Qt::Orientation orientation,
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int role) const
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{
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if (orientation == Qt::Horizontal && role == Qt::DisplayRole)
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return rootItem->data(section);
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return QVariant();
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}
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//! [5]
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QModelIndex TreeModel::index(int row, int column, const QModelIndex &parent) const
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{
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if (parent.isValid() && parent.column() != 0)
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return QModelIndex();
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//! [5]
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//! [6]
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TreeItem *parentItem = getItem(parent);
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TreeItem *childItem = parentItem->child(row);
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if (childItem)
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return createIndex(row, column, childItem);
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else
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return QModelIndex();
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}
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//! [6]
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bool TreeModel::insertColumns(int position, int columns, const QModelIndex &parent)
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{
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bool success;
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beginInsertColumns(parent, position, position + columns - 1);
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success = rootItem->insertColumns(position, columns);
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endInsertColumns();
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return success;
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}
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bool TreeModel::insertRows(int position, int rows, const QModelIndex &parent)
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{
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TreeItem *parentItem = getItem(parent);
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bool success;
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beginInsertRows(parent, position, position + rows - 1);
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success = parentItem->insertChildren(position, rows, rootItem->columnCount());
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endInsertRows();
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return success;
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}
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//! [7]
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QModelIndex TreeModel::parent(const QModelIndex &index) const
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{
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if (!index.isValid())
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return QModelIndex();
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TreeItem *childItem = getItem(index);
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TreeItem *parentItem = childItem->parent();
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if (parentItem == rootItem)
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return QModelIndex();
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return createIndex(parentItem->childNumber(), 0, parentItem);
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}
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//! [7]
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bool TreeModel::removeColumns(int position, int columns, const QModelIndex &parent)
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{
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bool success;
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beginRemoveColumns(parent, position, position + columns - 1);
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success = rootItem->removeColumns(position, columns);
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endRemoveColumns();
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if (rootItem->columnCount() == 0)
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removeRows(0, rowCount());
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return success;
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}
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bool TreeModel::removeRows(int position, int rows, const QModelIndex &parent)
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{
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TreeItem *parentItem = getItem(parent);
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bool success = true;
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beginRemoveRows(parent, position, position + rows - 1);
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success = parentItem->removeChildren(position, rows);
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endRemoveRows();
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return success;
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}
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//! [8]
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int TreeModel::rowCount(const QModelIndex &parent) const
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{
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TreeItem *parentItem = getItem(parent);
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return parentItem->childCount();
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}
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//! [8]
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bool TreeModel::setData(const QModelIndex &index, const QVariant &value, int role)
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{
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if (role != Qt::EditRole)
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return false;
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TreeItem *item = getItem(index);
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bool result = item->setData(index.column(), value);
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if (result)
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emit dataChanged(index, index);
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return result;
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}
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bool TreeModel::setHeaderData(int section, Qt::Orientation orientation,
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const QVariant &value, int role)
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{
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if (role != Qt::EditRole || orientation != Qt::Horizontal)
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return false;
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bool result = rootItem->setData(section, value);
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if (result)
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emit headerDataChanged(orientation, section, section);
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return result;
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}
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void TreeModel::setupModelData(const QStringList &lines, TreeItem *parent)
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{
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QList<TreeItem*> parents;
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QList<int> indentations;
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parents << parent;
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indentations << 0;
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int number = 0;
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while (number < lines.count()) {
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int position = 0;
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while (position < lines[number].length()) {
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if (lines[number].at(position) != ' ')
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break;
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++position;
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}
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QString lineData = lines[number].mid(position).trimmed();
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if (!lineData.isEmpty()) {
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// Read the column data from the rest of the line.
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QStringList columnStrings = lineData.split("\t", QString::SkipEmptyParts);
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QVector<QVariant> columnData;
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for (int column = 0; column < columnStrings.count(); ++column)
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columnData << columnStrings[column];
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if (position > indentations.last()) {
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// The last child of the current parent is now the new parent
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// unless the current parent has no children.
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if (parents.last()->childCount() > 0) {
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parents << parents.last()->child(parents.last()->childCount()-1);
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indentations << position;
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}
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} else {
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while (position < indentations.last() && parents.count() > 0) {
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parents.pop_back();
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indentations.pop_back();
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}
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}
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// Append a new item to the current parent's list of children.
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TreeItem *parent = parents.last();
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parent->insertChildren(parent->childCount(), 1, rootItem->columnCount());
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for (int column = 0; column < columnData.size(); ++column)
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parent->child(parent->childCount() - 1)->setData(column, columnData[column]);
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}
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++number;
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}
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}
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