1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QABSTRACTITEMMODEL_P_H
#define QABSTRACTITEMMODEL_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of QAbstractItemModel*. This header file may change from version
// to version without notice, or even be removed.
//
// We mean it.
//
//
#include "private/qobject_p.h"
#include "QtCore/qstack.h"
#include "QtCore/qset.h"
#include "QtCore/qhash.h"
QT_BEGIN_NAMESPACE
class QPersistentModelIndexData
{
public:
QPersistentModelIndexData() : model(0) {}
QPersistentModelIndexData(const QModelIndex &idx) : index(idx), model(idx.model()) {}
QModelIndex index;
QAtomicInt ref;
const QAbstractItemModel *model;
static QPersistentModelIndexData *create(const QModelIndex &index);
static void destroy(QPersistentModelIndexData *data);
};
class Q_CORE_EXPORT QAbstractItemModelPrivate : public QObjectPrivate
{
Q_DECLARE_PUBLIC(QAbstractItemModel)
public:
QAbstractItemModelPrivate() : QObjectPrivate(), supportedDragActions(-1), roleNames(defaultRoleNames()) {}
void removePersistentIndexData(QPersistentModelIndexData *data);
void movePersistentIndexes(QVector<QPersistentModelIndexData *> indexes, int change, const QModelIndex &parent, Qt::Orientation orientation);
void rowsAboutToBeInserted(const QModelIndex &parent, int first, int last);
void rowsInserted(const QModelIndex &parent, int first, int last);
void rowsAboutToBeRemoved(const QModelIndex &parent, int first, int last);
void rowsRemoved(const QModelIndex &parent, int first, int last);
void columnsAboutToBeInserted(const QModelIndex &parent, int first, int last);
void columnsInserted(const QModelIndex &parent, int first, int last);
void columnsAboutToBeRemoved(const QModelIndex &parent, int first, int last);
void columnsRemoved(const QModelIndex &parent, int first, int last);
static QAbstractItemModel *staticEmptyModel();
static bool variantLessThan(const QVariant &v1, const QVariant &v2);
void itemsAboutToBeMoved(const QModelIndex &srcParent, int srcFirst, int srcLast, const QModelIndex &destinationParent, int destinationChild, Qt::Orientation);
void itemsMoved(const QModelIndex &srcParent, int srcFirst, int srcLast, const QModelIndex &destinationParent, int destinationChild, Qt::Orientation orientation);
bool allowMove(const QModelIndex &srcParent, int srcFirst, int srcLast, const QModelIndex &destinationParent, int destinationChild, Qt::Orientation orientation);
inline QModelIndex createIndex(int row, int column, void *data = 0) const {
return q_func()->createIndex(row, column, data);
}
inline QModelIndex createIndex(int row, int column, int id) const {
return q_func()->createIndex(row, column, id);
}
inline bool indexValid(const QModelIndex &index) const {
return (index.row() >= 0) && (index.column() >= 0) && (index.model() == q_func());
}
inline void invalidatePersistentIndexes() {
foreach (QPersistentModelIndexData *data, persistent.indexes) {
data->index = QModelIndex();
data->model = 0;
}
persistent.indexes.clear();
}
/*!
\internal
clean the QPersistentModelIndex relative to the index if there is one.
To be used before an index is invalided
*/
inline void invalidatePersistentIndex(const QModelIndex &index) {
QHash<QModelIndex, QPersistentModelIndexData *>::iterator it = persistent.indexes.find(index);
if(it != persistent.indexes.end()) {
QPersistentModelIndexData *data = *it;
persistent.indexes.erase(it);
data->index = QModelIndex();
data->model = 0;
}
}
struct Change {
Change() : first(-1), last(-1) {}
Change(const Change &c) : parent(c.parent), first(c.first), last(c.last), needsAdjust(c.needsAdjust) {}
Change(const QModelIndex &p, int f, int l) : parent(p), first(f), last(l), needsAdjust(false) {}
QModelIndex parent;
int first, last;
// In cases such as this:
// - A
// - B
// - C
// - - D
// - - E
// - - F
//
// If B is moved to above E, C is the source parent in the signal and its row is 2. When the move is
// completed however, C is at row 1 and there is no row 2 at the same level in the model at all.
// The QModelIndex is adjusted to correct that in those cases before reporting it though the
// rowsMoved signal.
bool needsAdjust;
bool isValid() { return first >= 0 && last >= 0; }
};
QStack<Change> changes;
struct Persistent {
Persistent() {}
QHash<QModelIndex, QPersistentModelIndexData *> indexes;
QStack<QVector<QPersistentModelIndexData *> > moved;
QStack<QVector<QPersistentModelIndexData *> > invalidated;
void insertMultiAtEnd(const QModelIndex& key, QPersistentModelIndexData *data);
} persistent;
Qt::DropActions supportedDragActions;
QHash<int,QByteArray> roleNames;
static const QHash<int,QByteArray> &defaultRoleNames();
};
QT_END_NAMESPACE
#endif // QABSTRACTITEMMODEL_P_H
|
