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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** 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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef SETTINGSTREE_H
#define SETTINGSTREE_H

#include <QIcon>
#include <QTimer>
#include <QTreeWidget>

QT_BEGIN_NAMESPACE
class QSettings;
QT_END_NAMESPACE

class SettingsTree : public QTreeWidget
{
    Q_OBJECT

public:
    SettingsTree(QWidget *parent = 0);

    void setSettingsObject(QSettings *settings);
    QSize sizeHint() const;

public slots:
    void setAutoRefresh(bool autoRefresh);
    void setFallbacksEnabled(bool enabled);
    void maybeRefresh();
    void refresh();

protected:
    bool event(QEvent *event);

private slots:
    void updateSetting(QTreeWidgetItem *item);

private:
    void updateChildItems(QTreeWidgetItem *parent);
    QTreeWidgetItem *createItem(const QString &text, QTreeWidgetItem *parent,
                                int index);
    QTreeWidgetItem *childAt(QTreeWidgetItem *parent, int index);
    int childCount(QTreeWidgetItem *parent);
    int findChild(QTreeWidgetItem *parent, const QString &text, int startIndex);
    void moveItemForward(QTreeWidgetItem *parent, int oldIndex, int newIndex);

    QSettings *settings;
    QTimer refreshTimer;
    bool autoRefresh;
    QIcon groupIcon;
    QIcon keyIcon;
};

#endif