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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 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 "filelistmodel.h"
#include <QGuiApplication>
#include <QDir>
#include <QPalette>
FileListModel::FileListModel(QObject *parent)
: QAbstractListModel(parent), fileCount(0)
{}
//![4]
int FileListModel::rowCount(const QModelIndex &parent) const
{
return parent.isValid() ? 0 : fileCount;
}
QVariant FileListModel::data(const QModelIndex &index, int role) const
{
if (!index.isValid())
return QVariant();
if (index.row() >= fileList.size() || index.row() < 0)
return QVariant();
if (role == Qt::DisplayRole) {
return fileList.at(index.row());
} else if (role == Qt::BackgroundRole) {
int batch = (index.row() / 100) % 2;
if (batch == 0)
return qApp->palette().base();
else
return qApp->palette().alternateBase();
}
return QVariant();
}
//![4]
//![1]
bool FileListModel::canFetchMore(const QModelIndex &parent) const
{
if (parent.isValid())
return false;
return (fileCount < fileList.size());
}
//![1]
//![2]
void FileListModel::fetchMore(const QModelIndex &parent)
{
if (parent.isValid())
return;
int remainder = fileList.size() - fileCount;
int itemsToFetch = qMin(100, remainder);
if (itemsToFetch <= 0)
return;
beginInsertRows(QModelIndex(), fileCount, fileCount + itemsToFetch - 1);
fileCount += itemsToFetch;
endInsertRows();
emit numberPopulated(itemsToFetch);
}
//![2]
//![0]
void FileListModel::setDirPath(const QString &path)
{
QDir dir(path);
beginResetModel();
fileList = dir.entryList();
fileCount = 0;
endResetModel();
}
//![0]
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