Unity 8
qvariantlistmodel.cpp
1 /****************************************************************************
2 **
3 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
4 ** Contact: http://www.qt-project.org/legal
5 **
6 ** This file is part of the QtGui module of the Qt Toolkit.
7 **
8 ** $QT_BEGIN_LICENSE:LGPL$
9 ** Commercial License Usage
10 ** Licensees holding valid commercial Qt licenses may use this file in
11 ** accordance with the commercial license agreement provided with the
12 ** Software or, alternatively, in accordance with the terms contained in
13 ** a written agreement between you and Digia. For licensing terms and
14 ** conditions see http://qt.digia.com/licensing. For further information
15 ** use the contact form at http://qt.digia.com/contact-us.
16 **
17 ** GNU Lesser General Public License Usage
18 ** Alternatively, this file may be used under the terms of the GNU Lesser
19 ** General Public License version 2.1 as published by the Free Software
20 ** Foundation and appearing in the file LICENSE.LGPL included in the
21 ** packaging of this file. Please review the following information to
22 ** ensure the GNU Lesser General Public License version 2.1 requirements
23 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
24 **
25 ** In addition, as a special exception, Digia gives you certain additional
26 ** rights. These rights are described in the Digia Qt LGPL Exception
27 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
28 **
29 ** GNU General Public License Usage
30 ** Alternatively, this file may be used under the terms of the GNU
31 ** General Public License version 3.0 as published by the Free Software
32 ** Foundation and appearing in the file LICENSE.GPL included in the
33 ** packaging of this file. Please review the following information to
34 ** ensure the GNU General Public License version 3.0 requirements will be
35 ** met: http://www.gnu.org/copyleft/gpl.html.
36 **
37 **
38 ** $QT_END_LICENSE$
39 **
40 ****************************************************************************/
41 
42 /*
43  A simple model that uses a QVariantList as its data source.
44  */
45 
46 // LightDM currently is Qt4 compatible, and so doesn't define setRoleNames.
47 // To use the same method of setting role name that it does, we
48 // set our compatibility to Qt4 here too.
49 #define QT_DISABLE_DEPRECATED_BEFORE QT_VERSION_CHECK(4, 0, 0)
50 
51 #include "qvariantlistmodel.h"
52 
53 #include <QtCore/qvector.h>
54 
88  QAbstractListModel(parent)
89 {
90  QHash<int, QByteArray> roles(roleNames());
91  roles[Qt::DisplayRole] = "modelData";
92  setRoleNames(roles);
93 }
94 
100 QVariantListModel::QVariantListModel(const QVariantList &list, QObject *parent) :
101  QAbstractListModel(parent), lst(list)
102 {
103  QHash<int, QByteArray> roles(roleNames());
104  roles[Qt::DisplayRole] = "modelData";
105  setRoleNames(roles);
106 }
107 
108 QVariantListModel::~QVariantListModel() {
109 }
110 
122 int QVariantListModel::rowCount(const QModelIndex &parent) const
123 {
124  if (parent.isValid())
125  return 0;
126 
127  return lst.count();
128 }
129 
133 QModelIndex QVariantListModel::sibling(int row, int column,
134  const QModelIndex &idx) const
135 {
136  if (!idx.isValid() || column != 0 || row >= lst.count())
137  return QModelIndex();
138 
139  return createIndex(row, 0);
140 }
141 
151 QVariant QVariantListModel::data(const QModelIndex &index, int role) const
152 {
153  if (index.row() < 0 || index.row() >= lst.size())
154  return QVariant();
155 
156  if (role == Qt::DisplayRole || role == Qt::EditRole)
157  return lst.at(index.row());
158 
159  return QVariant();
160 }
161 
171 bool QVariantListModel::setData(const QModelIndex &index, const QVariant &value,
172  int role)
173 {
174  if (index.row() >= 0 && index.row() < lst.size()
175  && (role == Qt::EditRole || role == Qt::DisplayRole))
176  {
177  lst.replace(index.row(), value);
178  dataChanged(index, index, QVector<int>() << role);
179  return true;
180  }
181  return false;
182 }
183 
195 bool QVariantListModel::insertRows(int row, int count,
196  const QModelIndex &parent)
197 {
198  if (count < 1 || row < 0 || row > rowCount(parent))
199  return false;
200 
201  beginInsertRows(QModelIndex(), row, row + count - 1);
202 
203  for (int r = 0; r < count; ++r)
204  lst.insert(row, QVariant());
205 
206  endInsertRows();
207 
208  return true;
209 }
210 
222 bool QVariantListModel::removeRows(int row, int count,
223  const QModelIndex &parent)
224 {
225  if (count <= 0 || row < 0 || (row + count) > rowCount(parent))
226  return false;
227 
228  beginRemoveRows(QModelIndex(), row, row + count - 1);
229 
230  for (int r = 0; r < count; ++r)
231  lst.removeAt(row);
232 
233  endRemoveRows();
234 
235  return true;
236 }
237 
241 QVariantList QVariantListModel::variantList() const
242 {
243  return lst;
244 }
245 
252 void QVariantListModel::setVariantList(const QVariantList &list)
253 {
254  int size = lst.size();
255  bool sameSize = list.size() == size;
256  if (!sameSize)
257  {
258  beginResetModel();
259  }
260  lst = list;
261  if (!sameSize)
262  {
263  endResetModel();
264  } else
265  {
266  dataChanged(QAbstractListModel::index(0),
267  QAbstractListModel::index(size - 1));
268  }
269 }
QVariantList variantList() const
bool removeRows(int row, int count, const QModelIndex &parent=QModelIndex()) override
void setVariantList(const QVariantList &list)
QVariant data(const QModelIndex &index, int role) const override
bool setData(const QModelIndex &index, const QVariant &value, int role=Qt::EditRole) override
bool insertRows(int row, int count, const QModelIndex &parent=QModelIndex()) override
int rowCount(const QModelIndex &parent=QModelIndex()) const override
QModelIndex sibling(int row, int column, const QModelIndex &idx) const override
QVariantListModel(QObject *parent=0)