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42 #ifndef PatternistSDK_TreeItem_H
43 #define PatternistSDK_TreeItem_H
54 template<typename T> class QList;
55 template<typename T> class QPointer;
57 namespace QPatternistSDK
60 * @short TreeItem is a node in a hierachial structure and is used together
63 * TreeItem is abstract base class. Instances of sub-classes of TreeItem
64 * can be used with TreeModel in order to use hierarchial data in Qt's
65 * model/view framework.
67 * TreeItem is a QObject in order to be able to be used with QPointer.
69 * @author Frans Englich <frans.englich@nokia.com>
71 * @ingroup PatternistSDK
73 class Q_PATTERNISTSDK_EXPORT TreeItem : public QObject
77 typedef QList<QPointer<TreeItem> > List;
79 virtual ~TreeItem() {}
80 virtual void appendChild(TreeItem *item) = 0;
81 virtual TreeItem *child(const unsigned int row) const = 0;
82 virtual unsigned int childCount() const = 0;
83 virtual TreeItem *parent() const = 0;
85 virtual TreeItem::List children() const = 0;
86 virtual int columnCount() const = 0;
89 * Determines the position among the children of
90 * this TreeItem's parent. This is done by introspecting the result
95 virtual QVariant data(const Qt::ItemDataRole role, int column) const = 0;
99 * Emitted whenever this item changed. This is used for keeping
100 * views in synchronization with the item model which houses
103 * @param item the item which changed. That is, this TreeItem.
105 void changed(TreeItem *item);
114 // vim: et:ts=4:sw=4:sts=4