qt5base-lts/examples/itemviews/editabletreemodel/treemodel.cpp
Lars Knoll e510b6e466 include fixes
Fixed the include statements
added QT+=widgets in examples/network to
get them to compile. Will need something better
than doing it manually.
2011-05-07 22:57:49 +02:00

289 lines
8.2 KiB
C++

/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** 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 Nokia Corporation and its Subsidiary(-ies) 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 <QtWidgets>
#include "treeitem.h"
#include "treemodel.h"
//! [0]
TreeModel::TreeModel(const QStringList &headers, const QString &data,
QObject *parent)
: QAbstractItemModel(parent)
{
QVector<QVariant> rootData;
foreach (QString header, headers)
rootData << header;
rootItem = new TreeItem(rootData);
setupModelData(data.split(QString("\n")), rootItem);
}
//! [0]
//! [1]
TreeModel::~TreeModel()
{
delete rootItem;
}
//! [1]
//! [2]
int TreeModel::columnCount(const QModelIndex & /* parent */) const
{
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 0;
return Qt::ItemIsEditable | Qt::ItemIsEnabled | Qt::ItemIsSelectable;
}
//! [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);
TreeItem *childItem = parentItem->child(row);
if (childItem)
return createIndex(row, column, childItem);
else
return QModelIndex();
}
//! [6]
bool TreeModel::insertColumns(int position, int columns, const QModelIndex &parent)
{
bool success;
beginInsertColumns(parent, position, position + columns - 1);
success = rootItem->insertColumns(position, columns);
endInsertColumns();
return success;
}
bool TreeModel::insertRows(int position, int rows, const QModelIndex &parent)
{
TreeItem *parentItem = getItem(parent);
bool success;
beginInsertRows(parent, position, position + rows - 1);
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->parent();
if (parentItem == rootItem)
return QModelIndex();
return createIndex(parentItem->childNumber(), 0, parentItem);
}
//! [7]
bool TreeModel::removeColumns(int position, int columns, const QModelIndex &parent)
{
bool success;
beginRemoveColumns(parent, position, position + columns - 1);
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);
bool success = true;
beginRemoveRows(parent, position, position + rows - 1);
success = parentItem->removeChildren(position, rows);
endRemoveRows();
return success;
}
//! [8]
int TreeModel::rowCount(const QModelIndex &parent) const
{
TreeItem *parentItem = getItem(parent);
return parentItem->childCount();
}
//! [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);
return result;
}
bool TreeModel::setHeaderData(int section, Qt::Orientation orientation,
const QVariant &value, int role)
{
if (role != Qt::EditRole || orientation != Qt::Horizontal)
return false;
bool result = rootItem->setData(section, value);
if (result)
emit headerDataChanged(orientation, section, section);
return result;
}
void TreeModel::setupModelData(const QStringList &lines, TreeItem *parent)
{
QList<TreeItem*> parents;
QList<int> indentations;
parents << parent;
indentations << 0;
int number = 0;
while (number < lines.count()) {
int position = 0;
while (position < lines[number].length()) {
if (lines[number].mid(position, 1) != " ")
break;
position++;
}
QString lineData = lines[number].mid(position).trimmed();
if (!lineData.isEmpty()) {
// Read the column data from the rest of the line.
QStringList columnStrings = lineData.split("\t", QString::SkipEmptyParts);
QVector<QVariant> columnData;
for (int column = 0; column < columnStrings.count(); ++column)
columnData << columnStrings[column];
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++;
}
}