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qtdeclarative/src/imports/folderlistmodel/qquickfolderlistmodel.cpp

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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.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
//![code]
#include "qquickfolderlistmodel.h"
#include "fileinfothread_p.h"
#include "fileproperty_p.h"
#include <qqmlcontext.h>
#include <qqmlfile.h>
QT_BEGIN_NAMESPACE
class QQuickFolderListModelPrivate
{
Q_DECLARE_PUBLIC(QQuickFolderListModel)
public:
QQuickFolderListModelPrivate(QQuickFolderListModel *q)
: q_ptr(q),
sortField(QQuickFolderListModel::Name), sortReversed(false), showFiles(true),
showDirs(true), showDirsFirst(false), showDotAndDotDot(false), showOnlyReadable(false),
showHidden(false), caseSensitive(true)
{
nameFilters << QLatin1String("*");
}
QQuickFolderListModel *q_ptr;
QUrl currentDir;
QUrl rootDir;
FileInfoThread fileInfoThread;
QList<FileProperty> data;
QHash<int, QByteArray> roleNames;
QQuickFolderListModel::SortField sortField;
QStringList nameFilters;
bool sortReversed;
bool showFiles;
bool showDirs;
bool showDirsFirst;
bool showDotAndDotDot;
bool showOnlyReadable;
bool showHidden;
bool caseSensitive;
~QQuickFolderListModelPrivate() {}
void init();
void updateSorting();
// private slots
void _q_directoryChanged(const QString &directory, const QList<FileProperty> &list);
void _q_directoryUpdated(const QString &directory, const QList<FileProperty> &list, int fromIndex, int toIndex);
void _q_sortFinished(const QList<FileProperty> &list);
static QString resolvePath(const QUrl &path);
};
void QQuickFolderListModelPrivate::init()
{
Q_Q(QQuickFolderListModel);
qRegisterMetaType<QList<FileProperty> >("QList<FileProperty>");
q->connect(&fileInfoThread, SIGNAL(directoryChanged(QString,QList<FileProperty>)),
q, SLOT(_q_directoryChanged(QString,QList<FileProperty>)));
q->connect(&fileInfoThread, SIGNAL(directoryUpdated(QString,QList<FileProperty>,int,int)),
q, SLOT(_q_directoryUpdated(QString,QList<FileProperty>,int,int)));
q->connect(&fileInfoThread, SIGNAL(sortFinished(QList<FileProperty>)),
q, SLOT(_q_sortFinished(QList<FileProperty>)));
q->connect(q, SIGNAL(rowCountChanged()), q, SIGNAL(countChanged()));
}
void QQuickFolderListModelPrivate::updateSorting()
{
Q_Q(QQuickFolderListModel);
QDir::SortFlags flags = 0;
switch (sortField) {
case QQuickFolderListModel::Unsorted:
flags |= QDir::Unsorted;
break;
case QQuickFolderListModel::Name:
flags |= QDir::Name;
break;
case QQuickFolderListModel::Time:
flags |= QDir::Time;
break;
case QQuickFolderListModel::Size:
flags |= QDir::Size;
break;
case QQuickFolderListModel::Type:
flags |= QDir::Type;
break;
default:
break;
}
emit q->layoutAboutToBeChanged();
if (sortReversed)
flags |= QDir::Reversed;
fileInfoThread.setSortFlags(flags);
}
void QQuickFolderListModelPrivate::_q_directoryChanged(const QString &directory, const QList<FileProperty> &list)
{
Q_Q(QQuickFolderListModel);
Q_UNUSED(directory);
data = list;
q->endResetModel();
emit q->rowCountChanged();
emit q->folderChanged();
}
void QQuickFolderListModelPrivate::_q_directoryUpdated(const QString &directory, const QList<FileProperty> &list, int fromIndex, int toIndex)
{
Q_Q(QQuickFolderListModel);
Q_UNUSED(directory);
QModelIndex parent;
if (data.size() == list.size()) {
QModelIndex modelIndexFrom = q->createIndex(fromIndex, 0);
QModelIndex modelIndexTo = q->createIndex(toIndex, 0);
data = list;
emit q->dataChanged(modelIndexFrom, modelIndexTo);
} else {
// File(s) inserted or removed. Since I do not know how many
// or where, I need to update the whole list from the first item.
// This is a little pessimistic, but optimizing it would require
// more information in the signal from FileInfoThread.
if (data.size() > 0) {
q->beginRemoveRows(parent, 0, data.size() - 1);
q->endRemoveRows();
}
data = list;
if (list.size() > 0) {
if (toIndex > list.size() - 1)
toIndex = list.size() - 1;
q->beginInsertRows(parent, 0, data.size() - 1);
q->endInsertRows();
}
emit q->rowCountChanged();
}
}
void QQuickFolderListModelPrivate::_q_sortFinished(const QList<FileProperty> &list)
{
Q_Q(QQuickFolderListModel);
QModelIndex parent;
if (data.size() > 0) {
q->beginRemoveRows(parent, 0, data.size()-1);
data.clear();
q->endRemoveRows();
}
q->beginInsertRows(parent, 0, list.size()-1);
data = list;
q->endInsertRows();
}
QString QQuickFolderListModelPrivate::resolvePath(const QUrl &path)
{
QString localPath = QQmlFile::urlToLocalFileOrQrc(path);
QUrl localUrl = QUrl(localPath);
QString fullPath = localUrl.path();
if (localUrl.scheme().length())
fullPath = localUrl.scheme() + QLatin1Char(':') + fullPath;
return QDir::cleanPath(fullPath);
}
/*!
\qmlmodule Qt.labs.folderlistmodel 2.1
\title Qt Labs FolderListModel QML Types
\ingroup qmlmodules
\brief The FolderListModel provides a model of the contents of a file system folder.
To use this module, import the module with the following line:
\code
import Qt.labs.folderlistmodel 2.1
\endcode
*/
/*!
\qmltype FolderListModel
\inqmlmodule Qt.labs.folderlistmodel
\instantiates QQuickFolderListModel
\ingroup qtquick-models
\brief The FolderListModel provides a model of the contents of a file system folder.
FolderListModel provides access to information about the contents of a folder
in the local file system, exposing a list of files to views and other data components.
\note This type is made available by importing the \c Qt.labs.folderlistmodel module.
\e{Elements in the Qt.labs module are not guaranteed to remain compatible
in future versions.}
\b{import Qt.labs.folderlistmodel 2.1}
The \l folder property specifies the folder to access. Information about the
files and directories in the folder is supplied via the model's interface.
Components access names and paths via the following roles:
\list
\li \c fileName
\li \c filePath
\li \c fileURL (since Qt 5.2)
\li \c fileBaseName
\li \c fileSuffix
\li \c fileSize
\li \c fileModified
\li \c fileAccessed
\li \c fileIsDir
\endlist
Additionally a file entry can be differentiated from a folder entry via the
isFolder() method.
\section1 Filtering
Various properties can be set to filter the number of files and directories
exposed by the model.
The \l nameFilters property can be set to contain a list of wildcard filters
that are applied to names of files and directories, causing only those that
match the filters to be exposed.
Directories can be included or excluded using the \l showDirs property,
navigation directories can also be excluded by setting the \l showDotAndDotDot
property to false, hidden files can be included or excluded using the
\l showHidden property.
It is sometimes useful to limit the files and directories exposed to those
that the user can access. The \l showOnlyReadable property can be set to
enable this feature.
\section1 Example Usage
The following example shows a FolderListModel being used to provide a list
of QML files in a \l ListView:
\qml
import QtQuick 2.0
import Qt.labs.folderlistmodel 2.1
ListView {
width: 200; height: 400
FolderListModel {
id: folderModel
nameFilters: ["*.qml"]
}
Component {
id: fileDelegate
Text { text: fileName }
}
model: folderModel
delegate: fileDelegate
}
\endqml
\section1 Path Separators
Qt uses "/" as a universal directory separator in the same way that "/" is
used as a path separator in URLs. If you always use "/" as a directory
separator, Qt will translate your paths to conform to the underlying
operating system.
\sa {QML Data Models}
*/
QQuickFolderListModel::QQuickFolderListModel(QObject *parent)
: QAbstractListModel(parent), d_ptr(new QQuickFolderListModelPrivate(this))
{
Q_D(QQuickFolderListModel);
d->roleNames[FileNameRole] = "fileName";
d->roleNames[FilePathRole] = "filePath";
d->roleNames[FileBaseNameRole] = "fileBaseName";
d->roleNames[FileSuffixRole] = "fileSuffix";
d->roleNames[FileSizeRole] = "fileSize";
d->roleNames[FileLastModifiedRole] = "fileModified";
d->roleNames[FileLastReadRole] = "fileAccessed";
d->roleNames[FileIsDirRole] = "fileIsDir";
d->roleNames[FileUrlRole] = "fileURL";
d->init();
}
QQuickFolderListModel::~QQuickFolderListModel()
{
}
QVariant QQuickFolderListModel::data(const QModelIndex &index, int role) const
{
Q_D(const QQuickFolderListModel);
QVariant rv;
if (index.row() >= d->data.size())
return rv;
switch (role)
{
case FileNameRole:
rv = d->data.at(index.row()).fileName();
break;
case FilePathRole:
rv = d->data.at(index.row()).filePath();
break;
case FileBaseNameRole:
rv = d->data.at(index.row()).baseName();
break;
case FileSuffixRole:
rv = d->data.at(index.row()).suffix();
break;
case FileSizeRole:
rv = d->data.at(index.row()).size();
break;
case FileLastModifiedRole:
rv = d->data.at(index.row()).lastModified();
break;
case FileLastReadRole:
rv = d->data.at(index.row()).lastRead();
break;
case FileIsDirRole:
rv = d->data.at(index.row()).isDir();
break;
case FileUrlRole:
rv = QUrl::fromLocalFile(d->data.at(index.row()).filePath());
break;
default:
break;
}
return rv;
}
QHash<int, QByteArray> QQuickFolderListModel::roleNames() const
{
Q_D(const QQuickFolderListModel);
return d->roleNames;
}
/*!
\qmlproperty int FolderListModel::count
Returns the number of items in the current folder that match the
filter criteria.
*/
int QQuickFolderListModel::rowCount(const QModelIndex &parent) const
{
Q_D(const QQuickFolderListModel);
Q_UNUSED(parent);
return d->data.size();
}
QModelIndex QQuickFolderListModel::index(int row, int , const QModelIndex &) const
{
return createIndex(row, 0);
}
/*!
\qmlproperty string FolderListModel::folder
The \a folder property holds a URL for the folder that the model is
currently providing.
The value must be a \c file: or \c qrc: URL, or a relative URL.
By default, the value is an invalid URL.
*/
QUrl QQuickFolderListModel::folder() const
{
Q_D(const QQuickFolderListModel);
return d->currentDir;
}
void QQuickFolderListModel::setFolder(const QUrl &folder)
{
Q_D(QQuickFolderListModel);
if (folder == d->currentDir)
return;
QString resolvedPath = QQuickFolderListModelPrivate::resolvePath(folder);
beginResetModel();
//Remove the old path for the file system watcher
if (!d->currentDir.isEmpty())
d->fileInfoThread.removePath(d->currentDir.path());
d->currentDir = folder;
QFileInfo info(resolvedPath);
if (!info.exists() || !info.isDir()) {
d->data.clear();
endResetModel();
emit rowCountChanged();
return;
}
d->fileInfoThread.setPath(resolvedPath);
}
/*!
\qmlproperty url FolderListModel::rootFolder
When this property is set, the given folder will
be treated as the root in the file system, so that
you can only traverse subfolders within it.
*/
QUrl QQuickFolderListModel::rootFolder() const
{
Q_D(const QQuickFolderListModel);
return d->rootDir;
}
void QQuickFolderListModel::setRootFolder(const QUrl &path)
{
Q_D(QQuickFolderListModel);
if (path.isEmpty())
return;
QString resolvedPath = QQuickFolderListModelPrivate::resolvePath(path);
QFileInfo info(resolvedPath);
if (!info.exists() || !info.isDir())
return;
d->fileInfoThread.setRootPath(resolvedPath);
d->rootDir = path;
}
/*!
\qmlproperty url FolderListModel::parentFolder
Returns the URL of the parent of the current \l folder.
*/
QUrl QQuickFolderListModel::parentFolder() const
{
Q_D(const QQuickFolderListModel);
QString localFile = d->currentDir.toLocalFile();
if (!localFile.isEmpty()) {
QDir dir(localFile);
if (dir.isRoot() || !dir.cdUp())
return QUrl();
localFile = dir.path();
} else {
const QString path = d->currentDir.path();
const int pos = path.lastIndexOf(QLatin1Char('/'));
if (pos <= 0)
return QUrl();
localFile = path.left(pos);
}
return QUrl::fromLocalFile(localFile);
}
/*!
\qmlproperty list<string> FolderListModel::nameFilters
The \a nameFilters property contains a list of file name filters.
The filters may include the ? and * wildcards.
The example below filters on PNG and JPEG files:
\qml
FolderListModel {
nameFilters: [ "*.png", "*.jpg" ]
}
\endqml
\note Directories are not excluded by filters.
*/
QStringList QQuickFolderListModel::nameFilters() const
{
Q_D(const QQuickFolderListModel);
return d->nameFilters;
}
void QQuickFolderListModel::setNameFilters(const QStringList &filters)
{
Q_D(QQuickFolderListModel);
d->fileInfoThread.setNameFilters(filters);
d->nameFilters = filters;
}
void QQuickFolderListModel::classBegin()
{
}
void QQuickFolderListModel::componentComplete()
{
Q_D(QQuickFolderListModel);
QString localPath = QQmlFile::urlToLocalFileOrQrc(d->currentDir);
if (localPath.isEmpty() || !QDir(localPath).exists())
setFolder(QUrl::fromLocalFile(QDir::currentPath()));
d->fileInfoThread.start(QThread::LowPriority);
}
/*!
\qmlproperty enumeration FolderListModel::sortField
The \a sortField property contains field to use for sorting. sortField
may be one of:
\list
\li Unsorted - no sorting is applied.
\li Name - sort by filename
\li Time - sort by time modified
\li Size - sort by file size
\li Type - sort by file type (extension)
\endlist
\sa sortReversed
*/
QQuickFolderListModel::SortField QQuickFolderListModel::sortField() const
{
Q_D(const QQuickFolderListModel);
return d->sortField;
}
void QQuickFolderListModel::setSortField(SortField field)
{
Q_D(QQuickFolderListModel);
if (field != d->sortField) {
d->sortField = field;
d->updateSorting();
}
}
int QQuickFolderListModel::roleFromString(const QString &roleName) const
{
Q_D(const QQuickFolderListModel);
return d->roleNames.key(roleName.toLatin1(), -1);
}
/*!
\qmlproperty bool FolderListModel::sortReversed
If set to true, reverses the sort order. The default is false.
\sa sortField
*/
bool QQuickFolderListModel::sortReversed() const
{
Q_D(const QQuickFolderListModel);
return d->sortReversed;
}
void QQuickFolderListModel::setSortReversed(bool rev)
{
Q_D(QQuickFolderListModel);
if (rev != d->sortReversed) {
d->sortReversed = rev;
d->updateSorting();
}
}
/*!
\qmlmethod bool FolderListModel::isFolder(int index)
Returns true if the entry \a index is a folder; otherwise
returns false.
*/
bool QQuickFolderListModel::isFolder(int index) const
{
if (index != -1) {
QModelIndex idx = createIndex(index, 0);
if (idx.isValid()) {
QVariant var = data(idx, FileIsDirRole);
if (var.isValid())
return var.toBool();
}
}
return false;
}
/*!
\qmlproperty bool FolderListModel::showFiles
\since 5.2
If true, files are included in the model; otherwise only directories
are included.
By default, this property is true.
\sa showDirs
*/
bool QQuickFolderListModel::showFiles() const
{
Q_D(const QQuickFolderListModel);
return d->showFiles;
}
void QQuickFolderListModel::setShowFiles(bool on)
{
Q_D(QQuickFolderListModel);
d->fileInfoThread.setShowFiles(on);
d->showFiles = on;
}
/*!
\qmlproperty bool FolderListModel::showDirs
If true, directories are included in the model; otherwise only files
are included.
By default, this property is true.
Note that the nameFilters are not applied to directories.
\sa showDotAndDotDot
*/
bool QQuickFolderListModel::showDirs() const
{
Q_D(const QQuickFolderListModel);
return d->showDirs;
}
void QQuickFolderListModel::setShowDirs(bool on)
{
Q_D(QQuickFolderListModel);
d->fileInfoThread.setShowDirs(on);
d->showDirs = on;
}
/*!
\qmlproperty bool FolderListModel::showDirsFirst
If true, if directories are included in the model they will
always be shown first, then the files.
By default, this property is false.
*/
bool QQuickFolderListModel::showDirsFirst() const
{
Q_D(const QQuickFolderListModel);
return d->showDirsFirst;
}
void QQuickFolderListModel::setShowDirsFirst(bool on)
{
Q_D(QQuickFolderListModel);
d->fileInfoThread.setShowDirsFirst(on);
d->showDirsFirst = on;
}
/*!
\qmlproperty bool FolderListModel::showDotAndDotDot
If true, the "." and ".." directories are included in the model; otherwise
they are excluded.
By default, this property is false.
\sa showDirs
*/
bool QQuickFolderListModel::showDotAndDotDot() const
{
Q_D(const QQuickFolderListModel);
return d->showDotAndDotDot;
}
void QQuickFolderListModel::setShowDotAndDotDot(bool on)
{
Q_D(QQuickFolderListModel);
if (on != d->showDotAndDotDot) {
d->fileInfoThread.setShowDotAndDotDot(on);
}
}
/*!
\qmlproperty bool FolderListModel::showHidden
\since 5.2
If true, hidden files and directories are included in the model; otherwise
they are excluded.
By default, this property is false.
*/
bool QQuickFolderListModel::showHidden() const
{
Q_D(const QQuickFolderListModel);
return d->showHidden;
}
void QQuickFolderListModel::setShowHidden(bool on)
{
Q_D(QQuickFolderListModel);
if (on != d->showHidden) {
d->fileInfoThread.setShowHidden(on);
}
}
/*!
\qmlproperty bool FolderListModel::showOnlyReadable
If true, only readable files and directories are shown; otherwise all files
and directories are shown.
By default, this property is false.
\sa showDirs
*/
bool QQuickFolderListModel::showOnlyReadable() const
{
Q_D(const QQuickFolderListModel);
return d->showOnlyReadable;
}
void QQuickFolderListModel::setShowOnlyReadable(bool on)
{
Q_D(QQuickFolderListModel);
if (on != d->showOnlyReadable) {
d->fileInfoThread.setShowOnlyReadable(on);
}
}
/*!
* \qmlproperty bool FolderListModel::caseSensitive
* \since 5.7
*
* Use case sensitive pattern matching.
*
* By default, this property is true.
*
*/
bool QQuickFolderListModel::caseSensitive() const
{
Q_D(const QQuickFolderListModel);
return d->caseSensitive;
}
void QQuickFolderListModel::setCaseSensitive(bool on)
{
Q_D(QQuickFolderListModel);
if (on != d->caseSensitive) {
d->fileInfoThread.setCaseSensitive(on);
}
}
/*!
\qmlmethod var FolderListModel::get(int index, string property)
Get the folder property for the given index. The following properties
are available.
\list
\li \c fileName
\li \c filePath
\li \c fileURL (since Qt 5.2)
\li \c fileBaseName
\li \c fileSuffix
\li \c fileSize
\li \c fileModified
\li \c fileAccessed
\li \c fileIsDir
\endlist
*/
QVariant QQuickFolderListModel::get(int idx, const QString &property) const
{
int role = roleFromString(property);
if (role >= 0 && idx >= 0)
return data(index(idx, 0), role);
else
return QVariant();
}
/*!
\qmlmethod int FolderListModel::indexOf(url file)
\since 5.6
Get the index of the given file URL if the model contains it,
or -1 if not.
*/
int QQuickFolderListModel::indexOf(const QUrl &file) const
{
Q_D(const QQuickFolderListModel);
FileProperty toFind(QFileInfo(file.toLocalFile()));
return d->data.indexOf(toFind);
}
#include "moc_qquickfolderlistmodel.cpp"
//![code]
QT_END_NAMESPACE
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