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Diffstat (limited to 'examples/itemviews/fetchmore/filelistmodel.cpp')
-rw-r--r-- | examples/itemviews/fetchmore/filelistmodel.cpp | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/examples/itemviews/fetchmore/filelistmodel.cpp b/examples/itemviews/fetchmore/filelistmodel.cpp new file mode 100644 index 0000000000..727c658a3d --- /dev/null +++ b/examples/itemviews/fetchmore/filelistmodel.cpp @@ -0,0 +1,115 @@ +/**************************************************************************** +** +** 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) +{ +} + +//![4] +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(); +} +//![4] + +//![1] +bool FileListModel::canFetchMore(const QModelIndex & /* index */) const +{ + if (fileCount < fileList.size()) + return true; + else + return false; +} +//![1] + +//![2] +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); +} +//![2] + +//![0] +void FileListModel::setDirPath(const QString &path) +{ + QDir dir(path); + + fileList = dir.entryList(); + fileCount = 0; + reset(); +} +//![0] + |