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Diffstat (limited to 'tools/qmlviewer/qmlfolderlistmodel.cpp')
| -rw-r--r-- | tools/qmlviewer/qmlfolderlistmodel.cpp | 416 |
1 files changed, 416 insertions, 0 deletions
diff --git a/tools/qmlviewer/qmlfolderlistmodel.cpp b/tools/qmlviewer/qmlfolderlistmodel.cpp new file mode 100644 index 0000000..35c672d --- /dev/null +++ b/tools/qmlviewer/qmlfolderlistmodel.cpp @@ -0,0 +1,416 @@ +/**************************************************************************** +** +** Copyright (C) 2009 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. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qmlfolderlistmodel.h" +#include <QDirModel> +#include <QDebug> +#include <qmlcontext.h> + +class QmlFolderListModelPrivate +{ +public: + QmlFolderListModelPrivate() + : sortField(QmlFolderListModel::Name), sortReversed(false), count(0) { + nameFilters << QLatin1String("*"); + } + + void updateSorting() { + QDir::SortFlags flags = 0; + switch(sortField) { + case QmlFolderListModel::Unsorted: + flags |= QDir::Unsorted; + break; + case QmlFolderListModel::Name: + flags |= QDir::Name; + break; + case QmlFolderListModel::Time: + flags |= QDir::Time; + break; + case QmlFolderListModel::Size: + flags |= QDir::Size; + break; + case QmlFolderListModel::Type: + flags |= QDir::Type; + break; + } + + if (sortReversed) + flags |= QDir::Reversed; + + model.setSorting(flags); + } + + QDirModel model; + QUrl folder; + QStringList nameFilters; + QModelIndex folderIndex; + QmlFolderListModel::SortField sortField; + bool sortReversed; + int count; +}; + +/*! + \qmlclass FolderListModel + \brief The FolderListModel provides a model of the contents of a folder in a filesystem. + + FolderListModel provides access to the local filesystem. The \e folder property + specifies the folder to list. + + 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. + + The roles available are: + \list + \o fileName + \o filePath + \endlist + + Additionally a file entry can be differentiated from a folder entry + via the \l isFolder() method. +*/ + +QmlFolderListModel::QmlFolderListModel(QObject *parent) + : QListModelInterface(parent) +{ + d = new QmlFolderListModelPrivate; + d->model.setFilter(QDir::AllDirs | QDir::Files | QDir::Drives | QDir::NoDotAndDotDot); + connect(&d->model, SIGNAL(rowsInserted(const QModelIndex&,int,int)) + , this, SLOT(inserted(const QModelIndex&,int,int))); + connect(&d->model, SIGNAL(rowsRemoved(const QModelIndex&,int,int)) + , this, SLOT(removed(const QModelIndex&,int,int))); + connect(&d->model, SIGNAL(dataChanged(const QModelIndex&,const QModelIndex&)) + , this, SLOT(dataChanged(const QModelIndex&,const QModelIndex&))); + connect(&d->model, SIGNAL(modelReset()), this, SLOT(refresh())); + connect(&d->model, SIGNAL(layoutChanged()), this, SLOT(refresh())); +} + +QmlFolderListModel::~QmlFolderListModel() +{ + delete d; +} + +QHash<int,QVariant> QmlFolderListModel::data(int index, const QList<int> &roles) const +{ + Q_UNUSED(roles); + QHash<int,QVariant> folderData; + QModelIndex modelIndex = d->model.index(index, 0, d->folderIndex); + if (modelIndex.isValid()) { + folderData[QDirModel::FileNameRole] = d->model.data(modelIndex, QDirModel::FileNameRole); + folderData[QDirModel::FilePathRole] = QUrl::fromLocalFile(d->model.data(modelIndex, QDirModel::FilePathRole).toString()); + } + + return folderData; +} + +QVariant QmlFolderListModel::data(int index, int role) const +{ + QVariant rv; + QModelIndex modelIndex = d->model.index(index, 0, d->folderIndex); + if (modelIndex.isValid()) { + if (role == QDirModel::FileNameRole) + rv = d->model.data(modelIndex, QDirModel::FileNameRole); + else if (role == QDirModel::FilePathRole) + rv = QUrl::fromLocalFile(d->model.data(modelIndex, QDirModel::FilePathRole).toString()); + } + + return rv; +} + +int QmlFolderListModel::count() const +{ + return d->count; +} + +QList<int> QmlFolderListModel::roles() const +{ + QList<int> r; + r << QDirModel::FileNameRole; + r << QDirModel::FilePathRole; + return r; +} + +QString QmlFolderListModel::toString(int role) const +{ + switch (role) { + case QDirModel::FileNameRole: + return QLatin1String("fileName"); + case QDirModel::FilePathRole: + return QLatin1String("filePath"); + } + + return QString(); +} + +/*! + \qmlproperty string FolderListModel::folder + + The \a folder property holds the folder the model is currently providing. + + It is a URL, but must be a file: or qrc: URL (or relative to such a URL). +*/ +QUrl QmlFolderListModel::folder() const +{ + return d->folder; +} + +void QmlFolderListModel::setFolder(const QUrl &folder) +{ + if (folder == d->folder) + return; + QModelIndex index = d->model.index(folder.toLocalFile()); + if (index.isValid() && d->model.isDir(index)) { + d->folder = folder; + QMetaObject::invokeMethod(this, "refresh", Qt::QueuedConnection); + emit folderChanged(); + } +} + +QUrl QmlFolderListModel::parentFolder() const +{ + QUrl r; + QString localFile = d->folder.toLocalFile(); + if (!localFile.isEmpty()) { + QDir dir(localFile); +#if defined(Q_OS_SYMBIAN) + if (dir.isRoot()) + dir.setPath(""); + else +#endif + dir.cdUp(); + r = d->folder; + r.setPath(dir.path()); + } else { + int pos = d->folder.path().lastIndexOf(QLatin1Char('/')); + if (pos == -1) + return QUrl(); + r = d->folder; + r.setPath(d->folder.path().left(pos)); + } + return r; +} + +/*! + \qmlproperty list<string> FolderListModel::nameFilters + + The \a nameFilters property contains a list of filename filters. + The filters may include the ? and * wildcards. + + The example below filters on PNG and JPEG files: + + \code + FolderListModel { + nameFilters: [ "*.png", "*.jpg" ] + } + \endcode +*/ +QStringList QmlFolderListModel::nameFilters() const +{ + return d->nameFilters; +} + +void QmlFolderListModel::setNameFilters(const QStringList &filters) +{ + d->nameFilters = filters; + d->model.setNameFilters(d->nameFilters); +} + +void QmlFolderListModel::componentComplete() +{ + if (!d->folder.isValid() || !QDir().exists(d->folder.toLocalFile())) + setFolder(QUrl(QLatin1String("file://")+QDir::currentPath())); + + if (!d->folderIndex.isValid()) + QMetaObject::invokeMethod(this, "refresh", Qt::QueuedConnection); +} + +QmlFolderListModel::SortField QmlFolderListModel::sortField() const +{ + return d->sortField; +} + +void QmlFolderListModel::setSortField(SortField field) +{ + if (field != d->sortField) { + d->sortField = field; + d->updateSorting(); + } +} + +bool QmlFolderListModel::sortReversed() const +{ + return d->sortReversed; +} + +void QmlFolderListModel::setSortReversed(bool rev) +{ + 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 QmlFolderListModel::isFolder(int index) const +{ + if (index != -1) { + QModelIndex idx = d->model.index(index, 0, d->folderIndex); + if (idx.isValid()) + return d->model.isDir(idx); + } + return false; +} + +void QmlFolderListModel::refresh() +{ + d->folderIndex = QModelIndex(); + if (d->count) { + int tmpCount = d->count; + d->count = 0; + emit itemsRemoved(0, tmpCount); + } + d->folderIndex = d->model.index(d->folder.toLocalFile()); + d->count = d->model.rowCount(d->folderIndex); + if (d->count) { + emit itemsInserted(0, d->count); + } +} + +void QmlFolderListModel::inserted(const QModelIndex &index, int start, int end) +{ + if (index == d->folderIndex) { + d->count = d->model.rowCount(d->folderIndex); + emit itemsInserted(start, end - start + 1); + } +} + +void QmlFolderListModel::removed(const QModelIndex &index, int start, int end) +{ + if (index == d->folderIndex) { + d->count = d->model.rowCount(d->folderIndex); + emit itemsRemoved(start, end - start + 1); + } +} + +void QmlFolderListModel::dataChanged(const QModelIndex &start, const QModelIndex &end) +{ + qDebug() << "data changed"; + if (start.parent() == d->folderIndex) + emit itemsChanged(start.row(), end.row() - start.row() + 1, roles()); +} + +/*! + \qmlproperty bool FolderListModel::showDirs + + If true (the default), directories are included in the model. + + Note that the nameFilters are ignored for directories. +*/ +bool QmlFolderListModel::showDirs() const +{ + return d->model.filter() & QDir::AllDirs; +} + +void QmlFolderListModel::setShowDirs(bool on) +{ + if (!(d->model.filter() & QDir::AllDirs) == !on) + return; + if (on) + d->model.setFilter(d->model.filter() | QDir::AllDirs | QDir::Drives); + else + d->model.setFilter(d->model.filter() & ~(QDir::AllDirs | QDir::Drives)); +} + +/*! + \qmlproperty bool FolderListModel::showDotAndDotDot + + If true, the "." and ".." directories are included in the model. + + The default is false. +*/ +bool QmlFolderListModel::showDotAndDotDot() const +{ + return !(d->model.filter() & QDir::NoDotAndDotDot); +} + +void QmlFolderListModel::setShowDotAndDotDot(bool on) +{ + if (!(d->model.filter() & QDir::NoDotAndDotDot) == on) + return; + if (on) + d->model.setFilter(d->model.filter() & ~QDir::NoDotAndDotDot); + else + d->model.setFilter(d->model.filter() | QDir::NoDotAndDotDot); +} + +/*! + \qmlproperty bool FolderListModel::showOnlyReadable + + If true, only readable files and directories are shown. + + The default is false. +*/ +bool QmlFolderListModel::showOnlyReadable() const +{ + return d->model.filter() & QDir::Readable; +} + +void QmlFolderListModel::setShowOnlyReadable(bool on) +{ + if (!(d->model.filter() & QDir::Readable) == !on) + return; + if (on) + d->model.setFilter(d->model.filter() | QDir::Readable); + else + d->model.setFilter(d->model.filter() & ~QDir::Readable); +} + + +QML_DEFINE_TYPE(Qt,4,6,FolderListModel,QmlFolderListModel) + +QT_END_NAMESPACE + |