FolderListModel: remove widget and QDirModel use

FolderListModel used the obsolete QDirModel internally. Because of this
it needed widgets to work. I have made a threaded model instead that
use QDir internally.

Change-Id: Ibd1267a135ee3c6df7bcde420073866b7a76d0d1
Reviewed-by: Alan Alpert <alan.alpert@nokia.com>

1 files changed, 280 insertions, 0 deletions

diff --git a/src/imports/folderlistmodel/fileinfothread.cpp b/src/imports/folderlistmodel/fileinfothread.cpp
new file mode 100644
index 0000000000..3c4d60bb89
--- /dev/null
+++ b/src/imports/folderlistmodel/fileinfothread.cpp
@@ -0,0 +1,280 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** 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.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "fileinfothread_p.h"
+#include <qdiriterator.h>
+
+#include <QDebug>
+
+
+FileInfoThread::FileInfoThread(QObject *parent)
+    : QThread(parent),
+      abort(false),
+      watcher(0),
+      sortFlags(QDir::Name),
+      needUpdate(true),
+      folderUpdate(false),
+      sortUpdate(false),
+      showDirs(true),
+      showDirsFirst(false),
+      showDotDot(false),
+      showOnlyReadable(false)
+{
+    watcher = new QFileSystemWatcher(this);
+    connect(watcher, SIGNAL(directoryChanged(QString)), this, SLOT(dirChanged(QString)));
+    connect(watcher, SIGNAL(fileChanged(QString)), this, SLOT(updateFile(QString)));
+    start(LowPriority);
+}
+
+FileInfoThread::~FileInfoThread()
+{
+    QMutexLocker locker(&mutex);
+    abort = true;
+    condition.wakeOne();
+    locker.unlock();
+    wait();
+}
+
+void FileInfoThread::clear()
+{
+    QMutexLocker locker(&mutex);
+    watcher->removePaths(watcher->files());
+    watcher->removePaths(watcher->directories());
+}
+
+void FileInfoThread::removePath(const QString &path)
+{
+    QMutexLocker locker(&mutex);
+    watcher->removePath(path);
+    currentPath.clear();
+}
+
+void FileInfoThread::setPath(const QString &path)
+{
+    Q_ASSERT(!path.isEmpty());
+
+    QMutexLocker locker(&mutex);
+    watcher->addPath(path);
+    currentPath = path;
+    needUpdate = true;
+    condition.wakeAll();
+}
+
+void FileInfoThread::setRootPath(const QString &path)
+{
+    Q_ASSERT(!path.isEmpty());
+
+    QMutexLocker locker(&mutex);
+    rootPath = path;
+}
+
+void FileInfoThread::dirChanged(const QString &directoryPath)
+{
+    Q_UNUSED(directoryPath);
+    QMutexLocker locker(&mutex);
+    folderUpdate = true;
+    condition.wakeAll();
+}
+
+void FileInfoThread::setSortFlags(QDir::SortFlags flags)
+{
+    QMutexLocker locker(&mutex);
+    sortFlags = flags;
+    sortUpdate = true;
+    condition.wakeAll();
+}
+
+void FileInfoThread::setNameFilters(const QStringList & filters)
+{
+    QMutexLocker locker(&mutex);
+    nameFilters = filters;
+    folderUpdate = true;
+    condition.wakeAll();
+}
+
+void FileInfoThread::setShowDirs(bool showFolders)
+{
+    QMutexLocker locker(&mutex);
+    showDirs = showFolders;
+    folderUpdate = true;
+    condition.wakeAll();
+}
+
+void FileInfoThread::setShowDirsFirst(bool showDirsFirst)
+{
+    QMutexLocker locker(&mutex);
+    showDirsFirst = showDirsFirst;
+    folderUpdate = true;
+    condition.wakeAll();
+}
+
+void FileInfoThread::setShowDotDot(bool on)
+{
+    QMutexLocker locker(&mutex);
+    showDotDot = on;
+    folderUpdate = true;
+    condition.wakeAll();
+}
+
+void FileInfoThread::setShowOnlyReadable(bool on)
+{
+    QMutexLocker locker(&mutex);
+    showOnlyReadable = on;
+    folderUpdate = true;
+    condition.wakeAll();
+}
+
+void FileInfoThread::updateFile(const QString &path)
+{
+    Q_UNUSED(path);
+    QMutexLocker locker(&mutex);
+    folderUpdate = true;
+    condition.wakeAll();
+}
+
+void FileInfoThread::run()
+{
+    forever {
+        bool updateFiles = false;
+        QMutexLocker locker(&mutex);
+        if (abort) {
+            return;
+        }
+        if (currentPath.isEmpty() || !needUpdate)
+            condition.wait(&mutex);
+
+        if (abort) {
+            return;
+        }
+
+        if (!currentPath.isEmpty()) {
+            updateFiles = true;
+        }
+        if (updateFiles)
+            getFileInfos(currentPath);
+        locker.unlock();
+    }
+}
+
+
+void FileInfoThread::getFileInfos(const QString &path)
+{
+    QDir::Filters filter;
+    filter = QDir::Files | QDir::NoDot | QDir::CaseSensitive;
+    if (showDirs)
+        filter = filter | QDir::AllDirs | QDir::Drives;
+    if ((path == rootPath) || !showDotDot)
+        filter = filter | QDir::NoDotDot;
+    if (showOnlyReadable)
+        filter = filter | QDir::Readable;
+    if (showDirsFirst)
+        sortFlags = sortFlags | QDir::DirsFirst;
+
+    QDir currentDir(path, QString(), sortFlags);
+    QFileInfoList fileInfoList;
+    QList<FileProperty> filePropertyList;
+
+    fileInfoList = currentDir.entryInfoList(nameFilters, filter, sortFlags);
+
+    if (!fileInfoList.isEmpty()) {
+        foreach (QFileInfo info, fileInfoList) {
+            //qDebug() << "Adding file : " << info.fileName() << "to list ";
+            filePropertyList << FileProperty(info);
+        }
+        if (folderUpdate) {
+            int fromIndex = 0;
+            int toIndex = currentFileList.size()-1;
+            findChangeRange(filePropertyList, fromIndex, toIndex);
+            folderUpdate = false;
+            currentFileList = filePropertyList;
+            //qDebug() << "emit directoryUpdated : " << fromIndex << " " << toIndex;
+            emit directoryUpdated(path, filePropertyList, fromIndex, toIndex);
+        } else {
+            currentFileList = filePropertyList;
+            if (sortUpdate) {
+                emit sortFinished(filePropertyList);
+                sortUpdate = false;
+            } else
+                emit directoryChanged(path, filePropertyList);
+        }
+    } else {
+        // The directory is empty
+        if (folderUpdate) {
+            int fromIndex = 0;
+            int toIndex = currentFileList.size()-1;
+            folderUpdate = false;
+            currentFileList.clear();
+            emit directoryUpdated(path, filePropertyList, fromIndex, toIndex);
+        } else {
+            currentFileList.clear();
+            emit directoryChanged(path, filePropertyList);
+        }
+    }
+    needUpdate = false;
+}
+
+void FileInfoThread::findChangeRange(const QList<FileProperty> &list, int &fromIndex, int &toIndex)
+{
+    if (currentFileList.size() == 0) {
+        fromIndex = 0;
+        toIndex = list.size();
+        return;
+    }
+
+    int i;
+    int listSize = list.size() < currentFileList.size() ? list.size() : currentFileList.size();
+    bool changeFound = false;
+
+    for (i=0; i < listSize; i++) {
+        if (list.at(i) != currentFileList.at(i)) {
+            changeFound = true;
+            break;
+        }
+    }
+
+    if (changeFound)
+        fromIndex = i;
+    else
+        fromIndex = i-1;
+
+    // For now I let the rest of the list be updated..
+    toIndex = list.size() > currentFileList.size() ? list.size() - 1 : currentFileList.size() - 1;
+}