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28
29#ifndef PatternistSDK_TreeItem_H
30#define PatternistSDK_TreeItem_H
31
32#include <QObject>
33
34#include "Global.h"
35
36QT_BEGIN_NAMESPACE
37
38class QVariant;
39template<typename T> class QList;
40template<typename T> class QPointer;
41
42namespace QPatternistSDK
43{
44 /**
45 * @short TreeItem is a node in a hierachial structure and is used together
46 * with TreeModel.
47 *
48 * TreeItem is abstract base class. Instances of sub-classes of TreeItem
49 * can be used with TreeModel in order to use hierarchial data in Qt's
50 * model/view framework.
51 *
52 * TreeItem is a QObject in order to be able to be used with QPointer.
53 *
54 * @author Frans Englich <frans.englich@nokia.com>
55 * @see TreeModel
56 * @ingroup PatternistSDK
57 */
58 class TreeItem : public QObject
59 {
60 Q_OBJECT
61 public:
62 typedef QList<QPointer<TreeItem> > List;
63
64 virtual ~TreeItem() {}
65 virtual void appendChild(TreeItem *item) = 0;
66 virtual TreeItem *child(const unsigned int row) const = 0;
67 virtual unsigned int childCount() const = 0;
68 virtual TreeItem *parent() const = 0;
69
70 virtual TreeItem::List children() const = 0;
71 virtual int columnCount() const = 0;
72
73 /**
74 * Determines the position among the children of
75 * this TreeItem's parent. This is done by introspecting the result
76 * of children().
77 */
78 int row() const;
79
80 virtual QVariant data(const Qt::ItemDataRole role, int column) const = 0;
81
82 static QPair<int,int> executeRange;
83 static int executions;
84
85 Q_SIGNALS:
86 /**
87 * Emitted whenever this item changed. This is used for keeping
88 * views in synchronization with the item model which houses
89 * this item.
90 *
91 * @param item the item which changed. That is, this TreeItem.
92 */
93 void changed(TreeItem *item);
94 };
95}
96
97QT_END_NAMESPACE
98
99#endif
100// vim: et:ts=4:sw=4:sts=4
101

source code of qtxmlpatterns/tests/auto/xmlpatternssdk/TreeItem.h