1// Copyright (C) 2023 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
3
4//
5// W A R N I N G
6// -------------
7//
8// This file is not part of the QtGraphs API. It exists purely as an
9// implementation detail. This header file may change from version to
10// version without notice, or even be removed.
11//
12// We mean it.
13
14#ifndef ABSTRACTITEMMODELHANDLER_P_H
15#define ABSTRACTITEMMODELHANDLER_P_H
16
17#include <QtGraphs/private/qgraphsglobal_p.h>
18#include <QtCore/QAbstractItemModel>
19#include <QtCore/QPointer>
20#include <QtCore/QTimer>
21
22QT_BEGIN_NAMESPACE
23
24class AbstractItemModelHandler : public QObject
25{
26 Q_OBJECT
27public:
28 AbstractItemModelHandler(QObject *parent = 0);
29 ~AbstractItemModelHandler() override;
30
31 virtual void setItemModel(QAbstractItemModel *itemModel);
32 virtual QAbstractItemModel *itemModel() const;
33
34public Q_SLOTS:
35 virtual void handleColumnsInserted(const QModelIndex &parent, int start, int end);
36 virtual void handleColumnsMoved(const QModelIndex &sourceParent,
37 int sourceStart,
38 int sourceEnd,
39 const QModelIndex &destinationParent,
40 int destinationColumn);
41 virtual void handleColumnsRemoved(const QModelIndex &parent, int start, int end);
42 virtual void handleDataChanged(const QModelIndex &topLeft,
43 const QModelIndex &bottomRight,
44 const QList<int> &roles = QList<int>());
45 virtual void handleLayoutChanged(
46 const QList<QPersistentModelIndex> &parents = QList<QPersistentModelIndex>(),
47 QAbstractItemModel::LayoutChangeHint hint = QAbstractItemModel::NoLayoutChangeHint);
48 virtual void handleModelReset();
49 virtual void handleRowsInserted(const QModelIndex &parent, int start, int end);
50 virtual void handleRowsMoved(const QModelIndex &sourceParent,
51 int sourceStart,
52 int sourceEnd,
53 const QModelIndex &destinationParent,
54 int destinationRow);
55 virtual void handleRowsRemoved(const QModelIndex &parent, int start, int end);
56
57 virtual void handleMappingChanged();
58 virtual void handlePendingResolve();
59
60Q_SIGNALS:
61 void itemModelChanged(const QAbstractItemModel *itemModel);
62
63protected:
64 virtual void resolveModel() = 0;
65
66 QPointer<QAbstractItemModel> m_itemModel; // Not owned
67 bool resolvePending;
68 QTimer m_resolveTimer;
69 bool m_fullReset;
70 const int noRoleIndex = -1;
71
72private:
73 Q_DISABLE_COPY(AbstractItemModelHandler)
74};
75
76QT_END_NAMESPACE
77
78#endif
79

source code of qtgraphs/src/graphs3d/data/abstractitemmodelhandler_p.h