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  ** accordance with the commercial license agreement provided with the
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  ****************************************************************************/
  #ifndef BOOKMARKFILTERMODEL_H
  #define BOOKMARKFILTERMODEL_H
  
  #include <QtCore/QPersistentModelIndex>
  
  #include <QtCore/QAbstractProxyModel>
  #include <QtCore/QSortFilterProxyModel>
  
  QT_BEGIN_NAMESPACE
  
  class BookmarkItem;
  class BookmarkModel;
  
  typedef QList<QPersistentModelIndex> PersistentModelIndexCache;
  
  class BookmarkFilterModel : public QAbstractProxyModel
  {
      Q_OBJECT
  public:
      explicit BookmarkFilterModel(QObject *parent = 0);
  
      void setSourceModel(QAbstractItemModel *sourceModel);
  
      int rowCount(const QModelIndex &index) const;
      int columnCount(const QModelIndex &index) const;
  
      QModelIndex mapToSource(const QModelIndex &proxyIndex) const;
      QModelIndex mapFromSource(const QModelIndex &sourceIndex) const;
  
      QModelIndex parent(const QModelIndex &child) const;
      QModelIndex index(int row, int column, const QModelIndex &parent) const;
  
      Qt::DropActions supportedDropActions () const;
      Qt::ItemFlags flags(const QModelIndex &index) const;
  
      QVariant data(const QModelIndex &index, int role) const;
      bool setData(const QModelIndex &index, const QVariant &value, int role);
  
      void filterBookmarks();
      void filterBookmarkFolders();
  
  private slots:
      void changed(const QModelIndex &topLeft, const QModelIndex &bottomRight);
      void rowsInserted(const QModelIndex &parent, int start, int end);
      void rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end);
      void rowsRemoved(const QModelIndex &parent, int start, int end);
      void layoutAboutToBeChanged();
      void layoutChanged();
      void modelAboutToBeReset();
      void modelReset();
  
  private:
      void setupCache(const QModelIndex &parent);
      void collectItems(const QModelIndex &parent);
  
  private:
      bool hideBookmarks;
      BookmarkModel *sourceModel;
      PersistentModelIndexCache cache;
      QPersistentModelIndex indexToRemove;
  };
  
  // -- BookmarkTreeModel
  
  class BookmarkTreeModel : public QSortFilterProxyModel
  {
      Q_OBJECT
  public:
      BookmarkTreeModel(QObject *parent = 0);
      int columnCount(const QModelIndex &parent = QModelIndex()) const;
  
  protected:
      bool filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const;
  };
  
  QT_END_NAMESPACE
  
  #endif // BOOKMARKFILTERMODEL_H
  