settingstree.h Example File

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  #ifndef SETTINGSTREE_H
  #define SETTINGSTREE_H

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

  class QSettings;

  class SettingsTree : public QTreeWidget
  {
      Q_OBJECT

  public:
      typedef QSharedPointer<QSettings> SettingsPtr;

      SettingsTree(QWidget *parent = 0);
      ~SettingsTree();

      void setSettingsObject(const SettingsPtr &settings);
      QSize sizeHint() const override;

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

  protected:
      bool event(QEvent *event) override;

  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);

      SettingsPtr settings;
      QTimer refreshTimer;
      bool autoRefresh;
      QIcon groupIcon;
      QIcon keyIcon;
  };

  #endif