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entityorderproxymodel.cpp
1 /*
2  Copyright (C) 2010 Klarälvdalens Datakonsult AB,
3  a KDAB Group company, info@kdab.net,
4  author Stephen Kelly <stephen@kdab.com>
5 
6  This library is free software; you can redistribute it and/or modify it
7  under the terms of the GNU Library General Public License as published by
8  the Free Software Foundation; either version 2 of the License, or (at your
9  option) any later version.
10 
11  This library is distributed in the hope that it will be useful, but WITHOUT
12  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
14  License for more details.
15 
16  You should have received a copy of the GNU Library General Public License
17  along with this library; see the file COPYING.LIB. If not, write to the
18  Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19  02110-1301, USA.
20 */
21 
22 
23 #include "entityorderproxymodel.h"
24 
25 #include <QMimeData>
26 
27 #include <KDE/KConfigGroup>
28 #include <KUrl>
29 
30 #include "collection.h"
31 #include "item.h"
32 #include "entitytreemodel.h"
33 
34 namespace Akonadi
35 {
36 
37 class EntityOrderProxyModelPrivate
38 {
39 public:
40  EntityOrderProxyModelPrivate( EntityOrderProxyModel *qq )
41  : q_ptr( qq )
42  {
43 
44  }
45 
46  void saveOrder( const QModelIndex &index );
47 
48  KConfigGroup m_orderConfig;
49 
50  Q_DECLARE_PUBLIC( EntityOrderProxyModel )
51  EntityOrderProxyModel * const q_ptr;
52 
53 };
54 
55 }
56 
57 using namespace Akonadi;
58 
59 EntityOrderProxyModel::EntityOrderProxyModel( QObject* parent )
60  : QSortFilterProxyModel(parent), d_ptr( new EntityOrderProxyModelPrivate( this ) )
61 {
62  setDynamicSortFilter( true );
63  //setSortCaseSensitivity( Qt::CaseInsensitive );
64 }
65 
66 EntityOrderProxyModel::~EntityOrderProxyModel()
67 {
68  delete d_ptr;
69 }
70 
71 void EntityOrderProxyModel::setOrderConfig( KConfigGroup& configGroup )
72 {
73  Q_D( EntityOrderProxyModel );
74  layoutAboutToBeChanged();
75  d->m_orderConfig = configGroup;
76  layoutChanged();
77 }
78 
79 bool EntityOrderProxyModel::lessThan( const QModelIndex& left, const QModelIndex& right ) const
80 {
81  Q_D( const EntityOrderProxyModel );
82 
83  if ( !d->m_orderConfig.isValid() ) {
84  return QSortFilterProxyModel::lessThan( left, right );
85  }
86  Collection col = left.data( EntityTreeModel::ParentCollectionRole ).value<Collection>();
87 
88  if ( !d->m_orderConfig.hasKey( QString::number( col.id() ) ) ) {
89  return QSortFilterProxyModel::lessThan( left, right );
90  }
91 
92  const QStringList list = d->m_orderConfig.readEntry( QString::number( col.id() ), QStringList() );
93 
94  if ( list.isEmpty() ) {
95  return QSortFilterProxyModel::lessThan( left, right );
96  }
97 
98  const QString leftValue = configString( left );
99  const QString rightValue = configString( right );
100 
101  const int leftPosition = list.indexOf( leftValue );
102  const int rightPosition = list.indexOf( rightValue );
103 
104  if ( leftPosition < 0 || rightPosition < 0 ) {
105  return QSortFilterProxyModel::lessThan( left, right );
106  }
107 
108  return leftPosition < rightPosition;
109 }
110 
111 bool EntityOrderProxyModel::dropMimeData( const QMimeData* data, Qt::DropAction action, int row, int column, const QModelIndex& parent )
112 {
113  Q_D( EntityOrderProxyModel );
114 
115  if ( !d->m_orderConfig.isValid() ) {
116  return QSortFilterProxyModel::dropMimeData( data, action, row, column, parent );
117  }
118 
119  if ( !data->hasFormat( QLatin1String( "text/uri-list" ) ) ) {
120  return QSortFilterProxyModel::dropMimeData( data, action, row, column, parent );
121  }
122 
123  if ( row == -1 ) {
124  return QSortFilterProxyModel::dropMimeData( data, action, row, column, parent );
125  }
126 
127  bool containsMove = false;
128 
129  const KUrl::List urls = KUrl::List::fromMimeData( data );
130 
131  Collection parentCol;
132 
133  if ( parent.isValid() ) {
134  parentCol = parent.data( EntityTreeModel::CollectionRole ).value<Collection>();
135  } else {
136  if ( !hasChildren( parent ) ) {
137  return QSortFilterProxyModel::dropMimeData( data, action, row, column, parent );
138  }
139 
140  const QModelIndex targetIndex = index( 0, column, parent );
141 
142  parentCol = targetIndex.data( EntityTreeModel::ParentCollectionRole ).value<Collection>();
143  }
144 
145  QStringList droppedList;
146  foreach ( const KUrl &url, urls ) {
147  Collection col = Collection::fromUrl( url );
148 
149  if ( !col.isValid() ) {
150  Item item = Item::fromUrl( url );
151  if ( !item.isValid() ) {
152  continue;
153  }
154 
155  const QModelIndexList list = EntityTreeModel::modelIndexesForItem( this, item );
156  if ( list.isEmpty() ) {
157  continue;
158  }
159 
160  if ( !containsMove && list.first().data( EntityTreeModel::ParentCollectionRole ).value<Collection>().id() != parentCol.id() ) {
161  containsMove = true;
162  }
163 
164  droppedList << configString( list.first() );
165  } else {
166  const QModelIndex idx = EntityTreeModel::modelIndexForCollection( this, col );
167  if ( !idx.isValid() ) {
168  continue;
169  }
170 
171  if ( !containsMove && idx.data( EntityTreeModel::ParentCollectionRole ).value<Collection>().id() != parentCol.id() ) {
172  containsMove = true;
173  }
174 
175  droppedList << configString( idx );
176  }
177  }
178 
179  QStringList existingList;
180  if ( d->m_orderConfig.hasKey( QString::number( parentCol.id() ) ) ) {
181  existingList = d->m_orderConfig.readEntry( QString::number( parentCol.id() ), QStringList() );
182  } else {
183  const int rowCount = this->rowCount( parent );
184  for ( int row = 0; row < rowCount; ++row ) {
185  static const int column = 0;
186  const QModelIndex idx = this->index( row, column, parent );
187  existingList.append( configString( idx ) );
188  }
189  }
190  const int numberOfDroppedElement( droppedList.size() );
191  for ( int i = 0; i < numberOfDroppedElement; ++i ) {
192  const QString droppedItem = droppedList.at( i );
193  const int existingIndex = existingList.indexOf( droppedItem );
194  existingList.removeAt( existingIndex );
195  existingList.insert( row + i - ( existingIndex > row ? 0 : 1 ), droppedList.at( i ) );
196  }
197 
198  d->m_orderConfig.writeEntry( QString::number( parentCol.id() ), existingList );
199 
200  if ( containsMove ) {
201  bool result = QSortFilterProxyModel::dropMimeData( data, action, row, column, parent );
202  invalidate();
203  return result;
204  }
205  invalidate();
206  return true;
207 }
208 
209 QModelIndexList EntityOrderProxyModel::match( const QModelIndex& start, int role, const QVariant& value, int hits, Qt::MatchFlags flags ) const
210 {
211  if ( role < Qt::UserRole ) {
212  return QSortFilterProxyModel::match( start, role, value, hits, flags );
213  }
214 
215  QModelIndexList list;
216  QModelIndex proxyIndex;
217  foreach ( const QModelIndex &idx, sourceModel()->match( mapToSource( start ), role, value, hits, flags ) ) {
218  proxyIndex = mapFromSource( idx );
219  if ( proxyIndex.isValid() ) {
220  list << proxyIndex;
221  }
222  }
223 
224  return list;
225 }
226 
227 void EntityOrderProxyModelPrivate::saveOrder( const QModelIndex &parent )
228 {
229  Q_Q( const EntityOrderProxyModel );
230  int rowCount = q->rowCount( parent );
231 
232  if ( rowCount == 0 ) {
233  return;
234  }
235 
236  static const int column = 0;
237  QModelIndex childIndex = q->index( 0, column, parent );
238 
239  QString parentKey = q->parentConfigString( childIndex );
240 
241  if ( parentKey.isEmpty() ) {
242  return;
243  }
244 
245  QStringList list;
246 
247  list << q->configString( childIndex );
248  saveOrder( childIndex );
249 
250  for ( int row = 1; row < rowCount; ++row ) {
251  childIndex = q->index( row, column, parent );
252  list << q->configString( childIndex );
253  saveOrder( childIndex );
254  }
255 
256  m_orderConfig.writeEntry( parentKey, list );
257 }
258 
259 QString EntityOrderProxyModel::parentConfigString( const QModelIndex& index ) const
260 {
261  const Collection col = index.data( EntityTreeModel::ParentCollectionRole ).value<Collection>();
262 
263  Q_ASSERT( col.isValid() );
264  if ( !col.isValid() ) {
265  return QString();
266  }
267 
268  return QString::number( col.id() );
269 }
270 
271 QString EntityOrderProxyModel::configString( const QModelIndex& index ) const
272 {
273  Entity::Id eId = index.data( EntityTreeModel::ItemIdRole ).toLongLong();
274  if ( eId != -1 ) {
275  return QString::fromLatin1( "i" ) + QString::number( eId );
276  }
277  eId = index.data( EntityTreeModel::CollectionIdRole ).toLongLong();
278  if ( eId != -1 ) {
279  return QString::fromLatin1( "c" ) + QString::number( eId );
280  }
281  Q_ASSERT( !"Invalid entity" );
282  return QString();
283 }
284 
285 void EntityOrderProxyModel::saveOrder()
286 {
287  Q_D( EntityOrderProxyModel );
288  d->saveOrder( QModelIndex() );
289  d->m_orderConfig.sync();
290 }
291 
292 void EntityOrderProxyModel::clearOrder( const QModelIndex& parent )
293 {
294  Q_D( EntityOrderProxyModel );
295 
296  const QString parentKey = parentConfigString( index( 0, 0, parent ) );
297 
298  if ( parentKey.isEmpty() ) {
299  return;
300  }
301 
302  d->m_orderConfig.deleteEntry( parentKey );
303  invalidate();
304 }
305 
306 void EntityOrderProxyModel::clearTreeOrder()
307 {
308  Q_D( EntityOrderProxyModel );
309  d->m_orderConfig.deleteGroup();
310  invalidate();
311 }
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