filelistmodel.cpp Example Fileitemviews/fetchmore/filelistmodel.cpp/**************************************************************************** ** ** 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 "filelistmodel.h" #include <QApplication> #include <QPalette> #include <QBrush> #include <QDir> FileListModel::FileListModel(QObject *parent) : QAbstractListModel(parent) { } int FileListModel::rowCount(const QModelIndex & /* parent */) const { return 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(); } bool FileListModel::canFetchMore(const QModelIndex & /* index */) const { if (fileCount < fileList.size()) return true; else return false; } void FileListModel::fetchMore(const QModelIndex & /* index */) { int remainder = fileList.size() - fileCount; int itemsToFetch = qMin(100, remainder); beginInsertRows(QModelIndex(), fileCount, fileCount+itemsToFetch-1); fileCount += itemsToFetch; endInsertRows(); emit numberPopulated(itemsToFetch); } void FileListModel::setDirPath(const QString &path) { QDir dir(path); fileList = dir.entryList(); fileCount = 0; reset(); } |
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