summaryrefslogtreecommitdiff
path: root/TelepathyQt4Yell/Models/flat-model-proxy.cpp
blob: 86d21e55fce2e789e4b1fe547fd68b385242b48b (plain)
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
/*
 * This file is part of TelepathyQt4Yell Models
 *
 * Copyright (C) 2010 Collabora Ltd. <http://www.collabora.co.uk/>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include <TelepathyQt4Yell/Models/FlatModelProxy>

#include "TelepathyQt4Yell/Models/_gen/flat-model-proxy.moc.hpp"

namespace Tpy
{

struct TELEPATHY_QT4_YELL_MODELS_NO_EXPORT FlatModelProxy::Private
{
    int offsetOf(const FlatModelProxy *model, int index) const;
};

int FlatModelProxy::Private::offsetOf(const FlatModelProxy *model, int index) const
{
    int offset = 0;
    for (int i = 0; i < index; i++) {
        offset += model->sourceModel()->rowCount(model->sourceModel()->index(i, 0, QModelIndex()));
    }
    return offset;
}

FlatModelProxy::FlatModelProxy(QAbstractItemModel *source)
    : QAbstractProxyModel(source),
      mPriv(new Private())
{
    setSourceModel(source);

    connect(source,
            SIGNAL(rowsAboutToBeInserted(QModelIndex,int,int)),
            SLOT(onRowsAboutToBeInserted(QModelIndex,int,int)));
    connect(source,
            SIGNAL(rowsInserted(QModelIndex,int,int)),
            SLOT(onRowsInserted(QModelIndex,int,int)));
    connect(source,
            SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)),
            SLOT(onRowsAboutToBeRemoved(QModelIndex,int,int)));
    connect(source,
            SIGNAL(rowsRemoved(QModelIndex,int,int)),
            SLOT(onRowsRemoved(QModelIndex,int,int)));
    connect(source,
            SIGNAL(rowsInserted(QModelIndex,int,int)),
            SIGNAL(rowCountChanged()));
    connect(source,
            SIGNAL(rowsRemoved(QModelIndex,int,int)),
            SIGNAL(rowCountChanged()));
    connect(source,
            SIGNAL(dataChanged(QModelIndex,QModelIndex)),
            SLOT(onDataChanged(QModelIndex,QModelIndex)));
}

FlatModelProxy::~FlatModelProxy()
{
    delete mPriv;
}

QModelIndex FlatModelProxy::mapFromSource(const QModelIndex &index) const
{
    if (!index.isValid()) {
        return QModelIndex();
    }

    QModelIndex parent = index.parent();

    if (!parent.isValid()) {
        return QModelIndex();
    }

    return createIndex(mPriv->offsetOf(this, parent.row()) + index.row(), index.column(), parent.row());
}

QModelIndex FlatModelProxy::mapToSource(const QModelIndex &index) const
{
    int parentRow = index.internalId();
    QModelIndex parent = sourceModel()->index(parentRow, 0, QModelIndex());
    int row = index.row() - mPriv->offsetOf(this, parent.row());
    return sourceModel()->index(row, index.column(), parent);
}

QModelIndex FlatModelProxy::index(int row, int column, const QModelIndex &parent) const
{
    int count = 0;
    for (int i = 0; i < sourceModel()->rowCount(QModelIndex()); i++) {
        QModelIndex sourceIndex = sourceModel()->index(i, 0, QModelIndex());
        count += sourceModel()->rowCount(sourceIndex);
        if (row < count) {
            return createIndex(row, column, i);
        }
    }

    return QModelIndex();
}

QModelIndex FlatModelProxy::parent(const QModelIndex &index) const
{
    return QModelIndex();
}

int FlatModelProxy::columnCount(const QModelIndex &parent) const
{
    return 1;
}

int FlatModelProxy::rowCount() const
{
    return rowCount(QModelIndex());
}

int FlatModelProxy::rowCount(const QModelIndex &parent) const
{
    return mPriv->offsetOf(this, sourceModel()->rowCount(QModelIndex()));
}

void FlatModelProxy::onRowsAboutToBeInserted(const QModelIndex &index, int first, int last)
{
    if (index.isValid()) {
        int offset = mPriv->offsetOf(this, index.row());
        int firstIndex = offset + first;
        int lastIndex = offset + last;

        beginInsertRows(QModelIndex(), firstIndex, lastIndex);
    }
}

void FlatModelProxy::onRowsAboutToBeRemoved(const QModelIndex &index, int first, int last)
{
    if (index.isValid()) {
        int offset = mPriv->offsetOf(this, index.row());
        int firstIndex = offset + first;
        int lastIndex = offset + last;

        beginRemoveRows(QModelIndex(), firstIndex, lastIndex);
    }
}

void FlatModelProxy::onRowsInserted(const QModelIndex &index, int first, int last)
{
    if (index.isValid()) {
        endInsertRows();
    }
}

void FlatModelProxy::onRowsRemoved(const QModelIndex &index, int first, int last)
{
    if (index.isValid()) {
        endRemoveRows();
    }
}

void FlatModelProxy::onDataChanged(const QModelIndex &first, const QModelIndex &last)
{
    if (first.parent().isValid() && last.parent().isValid() && first.parent() == last.parent()) {
        QModelIndex firstIndex = mapFromSource(first);
        QModelIndex lastIndex = mapFromSource(last);
        emit dataChanged(firstIndex, lastIndex);
    }
}

}