diff options
Diffstat (limited to 'examples/widgets/itemviews/fetchmore/filelistmodel.cpp')
-rw-r--r-- | examples/widgets/itemviews/fetchmore/filelistmodel.cpp | 104 |
1 files changed, 35 insertions, 69 deletions
diff --git a/examples/widgets/itemviews/fetchmore/filelistmodel.cpp b/examples/widgets/itemviews/fetchmore/filelistmodel.cpp index 3ee80617c0..94b00c5d09 100644 --- a/examples/widgets/itemviews/fetchmore/filelistmodel.cpp +++ b/examples/widgets/itemviews/fetchmore/filelistmodel.cpp @@ -1,52 +1,5 @@ -/**************************************************************************** -** -** 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." -** -** $QT_END_LICENSE$ -** -****************************************************************************/ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause #include "filelistmodel.h" @@ -54,8 +7,10 @@ #include <QDir> #include <QPalette> +static const int batchSize = 100; + FileListModel::FileListModel(QObject *parent) - : QAbstractListModel(parent), fileCount(0) + : QAbstractListModel(parent) {} //![4] @@ -67,24 +22,33 @@ int FileListModel::rowCount(const QModelIndex &parent) const 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 {}; + + const int row = index.row(); + if (row >= fileList.size() || row < 0) + return {}; + + switch (role) { + case Qt::DisplayRole: + return fileList.at(row).fileName(); + case Qt::BackgroundRole: { + const int batch = row / batchSize; + const QPalette &palette = QGuiApplication::palette(); + return (batch % 2) != 0 ? palette.alternateBase() : palette.base(); + } + case Qt::DecorationRole: + return iconProvider.icon(fileList.at(row)); } - return QVariant(); + return {}; } + //![4] +QFileInfo FileListModel::fileInfoAt(const QModelIndex &index) const +{ + return fileList.at(index.row()); +} + //![1] bool FileListModel::canFetchMore(const QModelIndex &parent) const { @@ -99,19 +63,20 @@ void FileListModel::fetchMore(const QModelIndex &parent) { if (parent.isValid()) return; - int remainder = fileList.size() - fileCount; - int itemsToFetch = qMin(100, remainder); + const int start = fileCount; + const int remainder = int(fileList.size()) - start; + const int itemsToFetch = qMin(batchSize, remainder); if (itemsToFetch <= 0) return; - beginInsertRows(QModelIndex(), fileCount, fileCount + itemsToFetch - 1); + beginInsertRows(QModelIndex(), start, start + itemsToFetch - 1); fileCount += itemsToFetch; endInsertRows(); - emit numberPopulated(itemsToFetch); + emit numberPopulated(path, start, itemsToFetch, int(fileList.size())); } //![2] @@ -121,7 +86,8 @@ void FileListModel::setDirPath(const QString &path) QDir dir(path); beginResetModel(); - fileList = dir.entryList(); + this->path = path; + fileList = dir.entryInfoList(QDir::NoDot | QDir::AllEntries, QDir::Name); fileCount = 0; endResetModel(); } |