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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of Qt for Python.
**
** $QT_BEGIN_LICENSE:BSD$
** 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
/*
model.cpp
A simple model that uses a QVector as its data source.
*/
#include "model.h"
/*!
Returns the number of items in the string list as the number of rows
in the model.
*/
int LinearModel::rowCount(const QModelIndex &parent) const
{
Q_USING(parent);
return values.count();
}
/*
Returns an appropriate value for the requested data.
If the view requests an invalid index, an invalid variant is returned.
If a header is requested then we just return the column or row number,
depending on the orientation of the header.
Any valid index that corresponds to a string in the list causes that
string to be returned.
*/
/*!
Returns a model index for other component to use when referencing the
item specified by the given row, column, and type. The parent index
is ignored.
*/
QModelIndex LinearModel::index(int row, int column, const QModelIndex &parent) const
{
if (parent == QModelIndex() && row >= 0 && row < rowCount()
&& column == 0)
return createIndex(row, column, 0);
else
return QModelIndex();
}
QVariant LinearModel::data(const QModelIndex &index, int role) const
{
Q_UNUSED(role);
if (!index.isValid())
return QVariant();
return values.at(index.row());
}
/*!
Returns Qt::ItemIsEditable so that all items in the vector can be edited.
*/
Qt::ItemFlags LinearModel::flags(const QModelIndex &index) const
{
// all items in the model are editable
return QAbstractListModel::flags(index) | Qt::ItemIsEditable;
}
/*!
Changes an item in the string list, but only if the following conditions
are met:
* The index supplied is valid.
* The index corresponds to an item to be shown in a view.
* The role associated with editing text is specified.
The dataChanged() signal is emitted if the item is changed.
*/
bool LinearModel::setData(const QModelIndex &index,
const QVariant &value, int role)
{
if (!index.isValid() || role != Qt::EditRole)
return false;
values.replace(index.row(), value.toInt());
emit dataChanged(index, index);
return true;
}
/*!
Inserts a number of rows into the model at the specified position.
*/
bool LinearModel::insertRows(int position, int rows, const QModelIndex &parent)
{
beginInsertRows(parent, position, position + rows - 1);
values.insert(position, rows, 0);
endInsertRows();
return true;
}
/*!
Removes a number of rows from the model at the specified position.
*/
bool LinearModel::removeRows(int position, int rows, const QModelIndex &parent)
{
beginRemoveRows(QModelIndex(), position, position+rows-1);
values.remove(position, rows);
endRemoveRows();
return true;
}
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