c158f881b3
The Qt version was added in 5.14 "for use as eventual replacement for QString::SplitBehavior." Move another step closer to that goal. Applied suitable wrapping round various char and string literals, since docs are meant to show best practice. Change-Id: Ie061905fad26f9b4dda3eedba4612704f0a19126 Reviewed-by: Lars Knoll <lars.knoll@qt.io>
301 lines
9.0 KiB
C++
301 lines
9.0 KiB
C++
/****************************************************************************
|
|
**
|
|
** 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 "treemodel.h"
|
|
#include "treeitem.h"
|
|
|
|
#include <QtWidgets>
|
|
|
|
//! [0]
|
|
TreeModel::TreeModel(const QStringList &headers, const QString &data, QObject *parent)
|
|
: QAbstractItemModel(parent)
|
|
{
|
|
QVector<QVariant> rootData;
|
|
for (const QString &header : headers)
|
|
rootData << header;
|
|
|
|
rootItem = new TreeItem(rootData);
|
|
setupModelData(data.split('\n'), rootItem);
|
|
}
|
|
//! [0]
|
|
|
|
//! [1]
|
|
TreeModel::~TreeModel()
|
|
{
|
|
delete rootItem;
|
|
}
|
|
//! [1]
|
|
|
|
//! [2]
|
|
int TreeModel::columnCount(const QModelIndex &parent) const
|
|
{
|
|
Q_UNUSED(parent);
|
|
return rootItem->columnCount();
|
|
}
|
|
//! [2]
|
|
|
|
QVariant TreeModel::data(const QModelIndex &index, int role) const
|
|
{
|
|
if (!index.isValid())
|
|
return QVariant();
|
|
|
|
if (role != Qt::DisplayRole && role != Qt::EditRole)
|
|
return QVariant();
|
|
|
|
TreeItem *item = getItem(index);
|
|
|
|
return item->data(index.column());
|
|
}
|
|
|
|
//! [3]
|
|
Qt::ItemFlags TreeModel::flags(const QModelIndex &index) const
|
|
{
|
|
if (!index.isValid())
|
|
return Qt::NoItemFlags;
|
|
|
|
return Qt::ItemIsEditable | QAbstractItemModel::flags(index);
|
|
}
|
|
//! [3]
|
|
|
|
//! [4]
|
|
TreeItem *TreeModel::getItem(const QModelIndex &index) const
|
|
{
|
|
if (index.isValid()) {
|
|
TreeItem *item = static_cast<TreeItem*>(index.internalPointer());
|
|
if (item)
|
|
return item;
|
|
}
|
|
return rootItem;
|
|
}
|
|
//! [4]
|
|
|
|
QVariant TreeModel::headerData(int section, Qt::Orientation orientation,
|
|
int role) const
|
|
{
|
|
if (orientation == Qt::Horizontal && role == Qt::DisplayRole)
|
|
return rootItem->data(section);
|
|
|
|
return QVariant();
|
|
}
|
|
|
|
//! [5]
|
|
QModelIndex TreeModel::index(int row, int column, const QModelIndex &parent) const
|
|
{
|
|
if (parent.isValid() && parent.column() != 0)
|
|
return QModelIndex();
|
|
//! [5]
|
|
|
|
//! [6]
|
|
TreeItem *parentItem = getItem(parent);
|
|
if (!parentItem)
|
|
return QModelIndex();
|
|
|
|
TreeItem *childItem = parentItem->child(row);
|
|
if (childItem)
|
|
return createIndex(row, column, childItem);
|
|
return QModelIndex();
|
|
}
|
|
//! [6]
|
|
|
|
bool TreeModel::insertColumns(int position, int columns, const QModelIndex &parent)
|
|
{
|
|
beginInsertColumns(parent, position, position + columns - 1);
|
|
const bool success = rootItem->insertColumns(position, columns);
|
|
endInsertColumns();
|
|
|
|
return success;
|
|
}
|
|
|
|
bool TreeModel::insertRows(int position, int rows, const QModelIndex &parent)
|
|
{
|
|
TreeItem *parentItem = getItem(parent);
|
|
if (!parentItem)
|
|
return false;
|
|
|
|
beginInsertRows(parent, position, position + rows - 1);
|
|
const bool success = parentItem->insertChildren(position,
|
|
rows,
|
|
rootItem->columnCount());
|
|
endInsertRows();
|
|
|
|
return success;
|
|
}
|
|
|
|
//! [7]
|
|
QModelIndex TreeModel::parent(const QModelIndex &index) const
|
|
{
|
|
if (!index.isValid())
|
|
return QModelIndex();
|
|
|
|
TreeItem *childItem = getItem(index);
|
|
TreeItem *parentItem = childItem ? childItem->parent() : nullptr;
|
|
|
|
if (parentItem == rootItem || !parentItem)
|
|
return QModelIndex();
|
|
|
|
return createIndex(parentItem->childNumber(), 0, parentItem);
|
|
}
|
|
//! [7]
|
|
|
|
bool TreeModel::removeColumns(int position, int columns, const QModelIndex &parent)
|
|
{
|
|
beginRemoveColumns(parent, position, position + columns - 1);
|
|
const bool success = rootItem->removeColumns(position, columns);
|
|
endRemoveColumns();
|
|
|
|
if (rootItem->columnCount() == 0)
|
|
removeRows(0, rowCount());
|
|
|
|
return success;
|
|
}
|
|
|
|
bool TreeModel::removeRows(int position, int rows, const QModelIndex &parent)
|
|
{
|
|
TreeItem *parentItem = getItem(parent);
|
|
if (!parentItem)
|
|
return false;
|
|
|
|
beginRemoveRows(parent, position, position + rows - 1);
|
|
const bool success = parentItem->removeChildren(position, rows);
|
|
endRemoveRows();
|
|
|
|
return success;
|
|
}
|
|
|
|
//! [8]
|
|
int TreeModel::rowCount(const QModelIndex &parent) const
|
|
{
|
|
const TreeItem *parentItem = getItem(parent);
|
|
|
|
return parentItem ? parentItem->childCount() : 0;
|
|
}
|
|
//! [8]
|
|
|
|
bool TreeModel::setData(const QModelIndex &index, const QVariant &value, int role)
|
|
{
|
|
if (role != Qt::EditRole)
|
|
return false;
|
|
|
|
TreeItem *item = getItem(index);
|
|
bool result = item->setData(index.column(), value);
|
|
|
|
if (result)
|
|
emit dataChanged(index, index, {Qt::DisplayRole, Qt::EditRole});
|
|
|
|
return result;
|
|
}
|
|
|
|
bool TreeModel::setHeaderData(int section, Qt::Orientation orientation,
|
|
const QVariant &value, int role)
|
|
{
|
|
if (role != Qt::EditRole || orientation != Qt::Horizontal)
|
|
return false;
|
|
|
|
const bool result = rootItem->setData(section, value);
|
|
|
|
if (result)
|
|
emit headerDataChanged(orientation, section, section);
|
|
|
|
return result;
|
|
}
|
|
|
|
void TreeModel::setupModelData(const QStringList &lines, TreeItem *parent)
|
|
{
|
|
QVector<TreeItem*> parents;
|
|
QVector<int> indentations;
|
|
parents << parent;
|
|
indentations << 0;
|
|
|
|
int number = 0;
|
|
|
|
while (number < lines.count()) {
|
|
int position = 0;
|
|
while (position < lines[number].length()) {
|
|
if (lines[number].at(position) != ' ')
|
|
break;
|
|
++position;
|
|
}
|
|
|
|
const QString lineData = lines[number].mid(position).trimmed();
|
|
|
|
if (!lineData.isEmpty()) {
|
|
// Read the column data from the rest of the line.
|
|
const QStringList columnStrings =
|
|
lineData.split(QLatin1Char('\t'), Qt::SkipEmptyParts);
|
|
QVector<QVariant> columnData;
|
|
columnData.reserve(columnStrings.size());
|
|
for (const QString &columnString : columnStrings)
|
|
columnData << columnString;
|
|
|
|
if (position > indentations.last()) {
|
|
// The last child of the current parent is now the new parent
|
|
// unless the current parent has no children.
|
|
|
|
if (parents.last()->childCount() > 0) {
|
|
parents << parents.last()->child(parents.last()->childCount()-1);
|
|
indentations << position;
|
|
}
|
|
} else {
|
|
while (position < indentations.last() && parents.count() > 0) {
|
|
parents.pop_back();
|
|
indentations.pop_back();
|
|
}
|
|
}
|
|
|
|
// Append a new item to the current parent's list of children.
|
|
TreeItem *parent = parents.last();
|
|
parent->insertChildren(parent->childCount(), 1, rootItem->columnCount());
|
|
for (int column = 0; column < columnData.size(); ++column)
|
|
parent->child(parent->childCount() - 1)->setData(column, columnData[column]);
|
|
}
|
|
++number;
|
|
}
|
|
}
|