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
|
/*
SPDX-FileCopyrightText: 2014 Eike Hein <hein@kde.org>
SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "funnelmodel.h"
FunnelModel::FunnelModel(QObject *parent)
: ForwardingModel(parent)
{
}
FunnelModel::~FunnelModel()
{
}
void FunnelModel::setSourceModel(QAbstractItemModel *model)
{
if (model && m_sourceModel == model) {
return;
}
if (!model) {
reset();
return;
}
connect(model, &QObject::destroyed, this, &ForwardingModel::reset);
if (!m_sourceModel) {
beginResetModel();
m_sourceModel = model;
connectSignals();
endResetModel();
Q_EMIT countChanged();
Q_EMIT sourceModelChanged();
Q_EMIT descriptionChanged();
return;
}
int oldCount = m_sourceModel->rowCount();
int newCount = model->rowCount();
auto setNewModel = [this, model]() {
disconnectSignals();
m_sourceModel = model;
connectSignals();
};
if (newCount > oldCount) {
beginInsertRows(QModelIndex(), oldCount, newCount - 1);
setNewModel();
endInsertRows();
} else if (newCount < oldCount) {
if (newCount == 0) {
beginResetModel();
setNewModel();
endResetModel();
} else {
beginRemoveRows(QModelIndex(), newCount, oldCount - 1);
setNewModel();
endRemoveRows();
}
} else {
setNewModel();
}
if (newCount > 0) {
Q_EMIT dataChanged(index(0, 0), index(qMin(oldCount, newCount) - 1, 0));
}
if (oldCount != newCount) {
Q_EMIT countChanged();
}
Q_EMIT sourceModelChanged();
Q_EMIT descriptionChanged();
}
#include "moc_funnelmodel.cpp"
|
