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settingstree.h Example File
tools/settingseditor/settingstree.h

 /****************************************************************************
 **
 ** Copyright (C) 2005-2008 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
 **
 ** This file is part of the documentation of the Qt Toolkit.
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 ** Licensees holding a valid Qt License Agreement may use this file in
 ** accordance with the rights, responsibilities and obligations
 ** contained therein.  Please consult your licensing agreement or
 ** contact [email protected] if any conditions of this licensing
 ** agreement are not clear to you.
 **
 ** Further information about Qt licensing is available at:
 ** http://trolltech.com/products/appdev/licensing.
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 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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 ****************************************************************************/

 #ifndef SETTINGSTREE_H
 #define SETTINGSTREE_H

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

 class QSettings;

 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