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
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300 | /* ============================================================
*
* This file is a part of digiKam project
* https://www.digikam.org
*
* Date : 2010-03-21
* Description : A model to hold GPS information about items.
*
* SPDX-FileCopyrightText: 2010-2025 by Gilles Caulier <caulier dot gilles at gmail dot com>
* SPDX-FileCopyrightText: 2010 by Michael G. Hansen <mike at mghansen dot de>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* ============================================================ */
#include "gpsitemmodel.h"
// Local includes
#include "digikam_debug.h"
namespace Digikam
{
class Q_DECL_HIDDEN GPSItemModel::Private
{
public:
Private() = default;
QList<GPSItemContainer*> items;
int columnCount = 0;
QMap<QPair<int, int>, QVariant> headerData;
ThumbnailLoadThread* thumbnailLoadThread = nullptr;
};
GPSItemModel::GPSItemModel(QObject* const parent)
: QAbstractItemModel(parent),
d (new Private)
{
d->thumbnailLoadThread = new ThumbnailLoadThread(this);
connect(d->thumbnailLoadThread, SIGNAL(signalThumbnailLoaded(LoadingDescription,QPixmap)),
this, SLOT(slotThumbnailLoaded(LoadingDescription,QPixmap)));
}
GPSItemModel::~GPSItemModel()
{
// TODO: send a signal before deleting the items?
qDeleteAll(d->items);
delete d;
}
int GPSItemModel::columnCount(const QModelIndex& /*parent*/) const
{
return d->columnCount;
}
QVariant GPSItemModel::data(const QModelIndex& index, int role) const
{
if (index.isValid())
{
Q_ASSERT(index.model() == this);
}
const int rowNumber = index.row();
if ((rowNumber < 0) || (rowNumber >= d->items.count()))
{
return QVariant();
}
return d->items.at(rowNumber)->data(index.column(), role);
}
QModelIndex GPSItemModel::index(int row, int column, const QModelIndex& parent) const
{
/*
qCDebug(DIGIKAM_GENERAL_LOG)<<row<<column<<parent;
*/
if (parent.isValid())
{
// there are no child items, only top level items
return QModelIndex();
}
if (
(column < 0) ||
(column >= d->columnCount) ||
(row < 0) ||
(row >= d->items.count())
)
{
return QModelIndex();
}
return createIndex(row, column, (void*)nullptr);
}
QModelIndex GPSItemModel::parent(const QModelIndex& /*index*/) const
{
// we have only top level items
return QModelIndex();
}
void GPSItemModel::addItem(GPSItemContainer* const newItem)
{
beginInsertRows(QModelIndex(), d->items.count(), d->items.count());
newItem->setModel(this);
d->items << newItem;
endInsertRows();
}
void GPSItemModel::setColumnCount(const int nColumns)
{
Q_EMIT layoutAboutToBeChanged();
d->columnCount = nColumns;
Q_EMIT layoutChanged();
}
void GPSItemModel::itemChanged(GPSItemContainer* const changedItem)
{
const int itemIndex = d->items.indexOf(changedItem);
if (itemIndex < 0)
{
return;
}
const QModelIndex itemModelIndexStart = createIndex(itemIndex, 0, (void*)nullptr);
const QModelIndex itemModelIndexEnd = createIndex(itemIndex, d->columnCount - 1, (void*)nullptr);
Q_EMIT dataChanged(itemModelIndexStart, itemModelIndexEnd);
}
GPSItemContainer* GPSItemModel::itemFromIndex(const QModelIndex& index) const
{
if (index.isValid())
{
Q_ASSERT(index.model() == this);
}
if (!index.isValid())
{
return nullptr;
}
const int row = index.row();
if ((row < 0) || (row >= d->items.count()))
{
return nullptr;
}
return d->items.at(row);
}
int GPSItemModel::rowCount(const QModelIndex& parent) const
{
if (parent.isValid())
{
return 0;
}
return d->items.count();
}
bool GPSItemModel::setHeaderData(int section, Qt::Orientation orientation, const QVariant& value, int role)
{
if ((section >= d->columnCount) || (orientation != Qt::Horizontal))
{
return false;
}
const QPair<int, int> headerIndex = QPair<int, int>(section, role);
d->headerData[headerIndex] = value;
return true;
}
QVariant GPSItemModel::headerData(int section, Qt::Orientation orientation, int role) const
{
if ((section >= d->columnCount) || (orientation != Qt::Horizontal))
{
return false;
}
const QPair<int, int> headerIndex = QPair<int, int>(section, role);
return d->headerData.value(headerIndex);
}
bool GPSItemModel::setData(const QModelIndex& index, const QVariant& value, int role)
{
Q_UNUSED(index);
Q_UNUSED(value);
Q_UNUSED(role);
return false;
}
Qt::ItemFlags GPSItemModel::flags(const QModelIndex& index) const
{
if (index.isValid())
{
Q_ASSERT(index.model() == this);
}
if (!index.isValid())
{
return Qt::NoItemFlags;
}
return (QAbstractItemModel::flags(index) | Qt::ItemIsDragEnabled);
}
GPSItemContainer* GPSItemModel::itemFromUrl(const QUrl& url) const
{
for (int i = 0 ; i < d->items.count() ; ++i)
{
if (d->items.at(i)->url() == url)
{
return d->items.at(i);
}
}
return nullptr;
}
QModelIndex GPSItemModel::indexFromUrl(const QUrl& url) const
{
for (int i = 0 ; i < d->items.count() ; ++i)
{
if (d->items.at(i)->url() == url)
{
return index(i, 0, QModelIndex());
}
}
return QModelIndex();
}
QPixmap GPSItemModel::getPixmapForIndex(const QPersistentModelIndex& itemIndex, const int size)
{
if (itemIndex.isValid())
{
Q_ASSERT(itemIndex.model() == this);
}
// TODO: should we cache the pixmap on our own here or does the interface usually cache it for us?
// TODO: do we need to make sure we do not request the same pixmap twice in a row?
// construct the key under which we stored the pixmap in the cache
GPSItemContainer* const imageItem = itemFromIndex(itemIndex);<--- Variable 'imageItem' can be declared as pointer to const
if (!imageItem)
{
return QPixmap();
}
QPixmap thumbnail;
if (d->thumbnailLoadThread->find(ThumbnailIdentifier(imageItem->url().toLocalFile()), thumbnail, size))
{
return thumbnail.copy(1, 1, thumbnail.size().width()-2, thumbnail.size().height()-2);
}
return QPixmap();
}
void GPSItemModel::slotThumbnailLoaded(const LoadingDescription& loadingDescription, const QPixmap& thumb)
{
if (thumb.isNull())
{
return;
}
const QModelIndex currentIndex = indexFromUrl(QUrl::fromLocalFile(loadingDescription.filePath));
if (currentIndex.isValid())
{
QPersistentModelIndex goodIndex(currentIndex);
Q_EMIT signalThumbnailForIndexAvailable(goodIndex, thumb.copy(1, 1, thumb.size().width()-2, thumb.size().height()-2));
}
}
Qt::DropActions GPSItemModel::supportedDragActions() const
{
return Qt::CopyAction;
}
} // namespace Digikam
#include "moc_gpsitemmodel.cpp"
|