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

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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