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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
/****************************************************************************
**
** Copyright (C) 2013 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the QtDataVisualization module.
**
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
**
****************************************************************************/
#include "abstractitemmodelhandler_p.h"
#include <QTimer>
namespace QtDataVisualization {
AbstractItemModelHandler::AbstractItemModelHandler(QObject *parent)
: QObject(parent),
resolvePending(0)
{
m_resolveTimer.setSingleShot(true);
QObject::connect(&m_resolveTimer, &QTimer::timeout,
this, &AbstractItemModelHandler::handlePendingResolve);
}
AbstractItemModelHandler::~AbstractItemModelHandler()
{
}
void AbstractItemModelHandler::setItemModel(const QAbstractItemModel *itemModel)
{
if (itemModel != m_itemModel.data()) {
if (!m_itemModel.isNull())
QObject::disconnect(m_itemModel, 0, this, 0);
m_itemModel = itemModel;
if (!m_itemModel.isNull()) {
QObject::connect(m_itemModel.data(), &QAbstractItemModel::columnsInserted,
this, &AbstractItemModelHandler::handleColumnsInserted);
QObject::connect(m_itemModel.data(), &QAbstractItemModel::columnsMoved,
this, &AbstractItemModelHandler::handleColumnsMoved);
QObject::connect(m_itemModel.data(), &QAbstractItemModel::columnsRemoved,
this, &AbstractItemModelHandler::handleColumnsRemoved);
QObject::connect(m_itemModel.data(), &QAbstractItemModel::dataChanged,
this, &AbstractItemModelHandler::handleDataChanged);
QObject::connect(m_itemModel.data(), &QAbstractItemModel::layoutChanged,
this, &AbstractItemModelHandler::handleLayoutChanged);
QObject::connect(m_itemModel.data(), &QAbstractItemModel::modelReset,
this, &AbstractItemModelHandler::handleModelReset);
QObject::connect(m_itemModel.data(), &QAbstractItemModel::rowsInserted,
this, &AbstractItemModelHandler::handleRowsInserted);
QObject::connect(m_itemModel.data(), &QAbstractItemModel::rowsMoved,
this, &AbstractItemModelHandler::handleRowsMoved);
QObject::connect(m_itemModel.data(), &QAbstractItemModel::rowsRemoved,
this, &AbstractItemModelHandler::handleRowsRemoved);
}
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0);
emit itemModelChanged(itemModel);
}
}
const QAbstractItemModel *AbstractItemModelHandler::itemModel() const
{
return m_itemModel.data();
}
void AbstractItemModelHandler::handleColumnsInserted(const QModelIndex &parent,
int start, int end)
{
Q_UNUSED(parent)
Q_UNUSED(start)
Q_UNUSED(end)
// Resolve new items
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0); // TODO Resolving entire model is inefficient
}
void AbstractItemModelHandler::handleColumnsMoved(const QModelIndex &sourceParent,
int sourceStart,
int sourceEnd,
const QModelIndex &destinationParent,
int destinationColumn)
{
Q_UNUSED(sourceParent)
Q_UNUSED(sourceStart)
Q_UNUSED(sourceEnd)
Q_UNUSED(destinationParent)
Q_UNUSED(destinationColumn)
// Resolve moved items
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0); // TODO Resolving entire model is inefficient
}
void AbstractItemModelHandler::handleColumnsRemoved(const QModelIndex &parent,
int start, int end)
{
Q_UNUSED(parent)
Q_UNUSED(start)
Q_UNUSED(end)
// Remove old items
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0); // TODO Resolving entire model is inefficient
}
void AbstractItemModelHandler::handleDataChanged(const QModelIndex &topLeft,
const QModelIndex &bottomRight,
const QVector<int> &roles)
{
Q_UNUSED(topLeft)
Q_UNUSED(bottomRight)
Q_UNUSED(roles)
// Resolve changed items
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0); // TODO Resolving entire model is inefficient
}
void AbstractItemModelHandler::handleLayoutChanged(const QList<QPersistentModelIndex> &parents,
QAbstractItemModel::LayoutChangeHint hint)
{
Q_UNUSED(parents)
Q_UNUSED(hint)
// Resolve moved items
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0); // TODO Resolving entire model is inefficient
}
void AbstractItemModelHandler::handleModelReset()
{
// Data cleared, reset array
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0); // TODO Resolving entire model is inefficient
}
void AbstractItemModelHandler::handleRowsInserted(const QModelIndex &parent, int start, int end)
{
Q_UNUSED(parent)
Q_UNUSED(start)
Q_UNUSED(end)
// Resolve new items
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0); // TODO Resolving entire model is inefficient
}
void AbstractItemModelHandler::handleRowsMoved(const QModelIndex &sourceParent,
int sourceStart,
int sourceEnd,
const QModelIndex &destinationParent,
int destinationRow)
{
Q_UNUSED(sourceParent)
Q_UNUSED(sourceStart)
Q_UNUSED(sourceEnd)
Q_UNUSED(destinationParent)
Q_UNUSED(destinationRow)
// Resolve moved items
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0); // TODO Resolving entire model is inefficient
}
void AbstractItemModelHandler::handleRowsRemoved(const QModelIndex &parent, int start, int end)
{
Q_UNUSED(parent)
Q_UNUSED(start)
Q_UNUSED(end)
// Resolve removed items
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0); // TODO Resolving entire model is inefficient
}
void AbstractItemModelHandler::handleMappingChanged()
{
if (!m_resolveTimer.isActive())
m_resolveTimer.start(0);
}
void AbstractItemModelHandler::handlePendingResolve()
{
resolveModel();
}
}
|
