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qdatawidgetmapper.cpp

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38 ****************************************************************************/ -

39 -

40 #include "qdatawidgetmapper.h" -

41 -

42 #ifndef QT_NO_DATAWIDGETMAPPER -

43 -

44 #include "qabstractitemmodel.h" -

45 #include "qitemdelegate.h" -

46 #include "qmetaobject.h" -

47 #include "qwidget.h" -

48 #include "private/qobject_p.h" -

49 #include "private/qabstractitemmodel_p.h" -

50 -

51 #include <iterator> -

52 -

53 QT_BEGIN_NAMESPACE -

54 -

55 class QDataWidgetMapperPrivate: public QObjectPrivate -

56 { -

57 public: -

58 Q_DECLARE_PUBLIC(QDataWidgetMapper) -

59 -

60 QDataWidgetMapperPrivate() -

61 : model(QAbstractItemModelPrivate::staticEmptyModel()), delegate(0), -

62 orientation(Qt::Horizontal), submitPolicy(QDataWidgetMapper::AutoSubmit) -

63 { -

}

never executed: end of block

65 -

66 QAbstractItemModel *model; -

67 QAbstractItemDelegate *delegate; -

68 Qt::Orientation orientation; -

69 QDataWidgetMapper::SubmitPolicy submitPolicy; -

70 QPersistentModelIndex rootIndex; -

71 QPersistentModelIndex currentTopLeft; -

72 -

73 inline int itemCount() -

74 { -

return orientation == Qt::Horizontal

never executed: return orientation == Qt::Horizontal ? model->rowCount(rootIndex) : model->columnCount(rootIndex);

? model->rowCount(rootIndex)

never executed: return orientation == Qt::Horizontal ? model->rowCount(rootIndex) : model->columnCount(rootIndex);

: model->columnCount(rootIndex);

never executed: return orientation == Qt::Horizontal ? model->rowCount(rootIndex) : model->columnCount(rootIndex);

78 } -

79 -

80 inline int currentIdx() const -

81 { -

return orientation == Qt::Horizontal ? currentTopLeft.row() : currentTopLeft.column();

never executed: return orientation == Qt::Horizontal ? currentTopLeft.row() : currentTopLeft.column();

83 } -

84 -

85 inline QModelIndex indexAt(int itemPos) -

86 { -

return orientation == Qt::Horizontal

never executed:

return orientation == Qt::Horizontal ? model->index(currentIdx(), itemPos, rootIndex) : model->index(itemPos, currentIdx(), rootIndex);

? model->index(currentIdx(), itemPos, rootIndex)

never executed:

return orientation == Qt::Horizontal ? model->index(currentIdx(), itemPos, rootIndex) : model->index(itemPos, currentIdx(), rootIndex);

: model->index(itemPos, currentIdx(), rootIndex);

never executed:

return orientation == Qt::Horizontal ? model->index(currentIdx(), itemPos, rootIndex) : model->index(itemPos, currentIdx(), rootIndex);

90 } -

91 -

92 inline void flipEventFilters(QAbstractItemDelegate *oldDelegate, -

93 QAbstractItemDelegate *newDelegate) -

94 { -

for (QList<WidgetMapper>::const_iterator it = widgetMap.cbegin(), end = widgetMap.cend(); it != end; ++it) {

it != end	Description
TRUE	never evaluated
FALSE	never evaluated

96 QWidget *w = it->widget; -

if (!w)

!w	Description
TRUE	never evaluated
FALSE	never evaluated

continue;

never executed: continue;

99 w->removeEventFilter(oldDelegate); -

100 w->installEventFilter(newDelegate); -

101

}

never executed: end of block

102

}

never executed: end of block

103 -

104 void populate(); -

105 -

106 // private slots -

107 void _q_dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight, const QVector<int> &); -

108 void _q_commitData(QWidget *); -

109 void _q_closeEditor(QWidget *, QAbstractItemDelegate::EndEditHint); -

110 void _q_modelDestroyed(); -

111 -

112 struct WidgetMapper -

113 { -

114 inline WidgetMapper(QWidget *w = 0, int c = 0, const QModelIndex &i = QModelIndex()) -

115

: widget(w), section(c), currentIndex(i) {}

never executed: end of block

116 inline WidgetMapper(QWidget *w, int c, const QModelIndex &i, const QByteArray &p) -

117

: widget(w), section(c), currentIndex(i), property(p) {}

never executed: end of block

118 -

119 QPointer<QWidget> widget; -

120 int section; -

121 QPersistentModelIndex currentIndex; -

122 QByteArray property; -

123 }; -

124 -

125 void populate(WidgetMapper &m); -

126 int findWidget(QWidget *w) const; -

127 -

128 bool commit(const WidgetMapper &m); -

129 -

130 QList<WidgetMapper> widgetMap; -

131 }; -

132 -

133 int QDataWidgetMapperPrivate::findWidget(QWidget *w) const -

134 { -

135

for (QList<WidgetMapper>::const_iterator it = widgetMap.cbegin(), end = widgetMap.cend(); it != end; ++it) {

it != end	Description
TRUE	never evaluated
FALSE	never evaluated

136

if (it->widget == w)

it->widget == w	Description
TRUE	never evaluated
FALSE	never evaluated

137

return int(std::distance(widgetMap.cbegin(), it));

never executed: return int(std::distance(widgetMap.cbegin(), it));

138

}

never executed: end of block

139

return -1;

never executed: return -1;

140 } -

141 -

142 bool QDataWidgetMapperPrivate::commit(const WidgetMapper &m) -

143 { -

144

if (m.widget.isNull())

m.widget.isNull()	Description
TRUE	never evaluated
FALSE	never evaluated

145

return true; // just ignore

never executed: return true;

146 -

147

if (!m.currentIndex.isValid())

!m.currentIndex.isValid()	Description
TRUE	never evaluated
FALSE	never evaluated

148

return false;

never executed: return false;

149 -

150 // Create copy to avoid passing the widget mappers data -

151 QModelIndex idx = m.currentIndex; -

152

if (m.property.isEmpty())

m.property.isEmpty()	Description
TRUE	never evaluated
FALSE	never evaluated

153

delegate->setModelData(m.widget, model, idx);

never executed: delegate->setModelData(m.widget, model, idx);

154 else -

155

model->setData(idx, m.widget->property(m.property), Qt::EditRole);

never executed: model->setData(idx, m.widget->property(m.property), Qt::EditRole);

156 -

157

return true;

never executed: return true;

158 } -

159 -

160 void QDataWidgetMapperPrivate::populate(WidgetMapper &m) -

161 { -

162

if (m.widget.isNull())

m.widget.isNull()	Description
TRUE	never evaluated
FALSE	never evaluated

163

return;

never executed: return;

164 -

165 m.currentIndex = indexAt(m.section); -

166

if (m.property.isEmpty())

m.property.isEmpty()	Description
TRUE	never evaluated
FALSE	never evaluated

167

delegate->setEditorData(m.widget, m.currentIndex);

never executed: delegate->setEditorData(m.widget, m.currentIndex);

168 else -

169

m.widget->setProperty(m.property, m.currentIndex.data(Qt::EditRole));

never executed: m.widget->setProperty(m.property, m.currentIndex.data(Qt::EditRole));

170 } -

171 -

172 void QDataWidgetMapperPrivate::populate() -

173 { -

174

for (QList<WidgetMapper>::iterator it = widgetMap.begin(), end = widgetMap.end(); it != end; ++it)

it != end	Description
TRUE	never evaluated
FALSE	never evaluated

175

populate(*it);

never executed: populate(*it);

176

}

never executed: end of block

177 -

178 static bool qContainsIndex(const QModelIndex &idx, const QModelIndex &topLeft, -

179 const QModelIndex &bottomRight) -

180 { -

181

return idx.row() >= topLeft.row() && idx.row() <= bottomRight.row()

never executed:

return idx.row() >= topLeft.row() && idx.row() <= bottomRight.row() && idx.column() >= topLeft.column() && idx.column() <= bottomRight.column();

182

&& idx.column() >= topLeft.column() && idx.column() <= bottomRight.column();

never executed:

return idx.row() >= topLeft.row() && idx.row() <= bottomRight.row() && idx.column() >= topLeft.column() && idx.column() <= bottomRight.column();

183 } -

184 -

185 void QDataWidgetMapperPrivate::_q_dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight, const QVector<int> &) -

186 { -

187

if (topLeft.parent() != rootIndex)

topLeft.parent() != rootIndex	Description
TRUE	never evaluated
FALSE	never evaluated

188

return; // not in our hierarchy

never executed: return;

189 -

190

for (QList<WidgetMapper>::iterator it = widgetMap.begin(), end = widgetMap.end(); it != end; ++it) {

it != end	Description
TRUE	never evaluated
FALSE	never evaluated

191

if (qContainsIndex(it->currentIndex, topLeft, bottomRight))

qContainsIndex..., bottomRight)	Description
TRUE	never evaluated
FALSE	never evaluated

192

populate(*it);

never executed: populate(*it);

193

}

never executed: end of block

194

}

never executed: end of block

195 -

196 void QDataWidgetMapperPrivate::_q_commitData(QWidget *w) -

197 { -

198

if (submitPolicy == QDataWidgetMapper::ManualSubmit)

submitPolicy =...::ManualSubmit	Description
TRUE	never evaluated
FALSE	never evaluated

199

return;

never executed: return;

200 -

201 int idx = findWidget(w); -

202

if (idx == -1)

idx == -1	Description
TRUE	never evaluated
FALSE	never evaluated

203

return; // not our widget

never executed: return;

204 -

205 commit(widgetMap.at(idx)); -

206

}

never executed: end of block

207 -

208 void QDataWidgetMapperPrivate::_q_closeEditor(QWidget *w, QAbstractItemDelegate::EndEditHint hint) -

209 { -

210 int idx = findWidget(w); -

211

if (idx == -1)

idx == -1	Description
TRUE	never evaluated
FALSE	never evaluated

212

return; // not our widget

never executed: return;

213 -

214 switch (hint) { -

215

case QAbstractItemDelegate::RevertModelCache: {

never executed: case QAbstractItemDelegate::RevertModelCache:

216 populate(widgetMap[idx]); -

217

break; }

never executed: break;

218

case QAbstractItemDelegate::EditNextItem:

never executed: case QAbstractItemDelegate::EditNextItem:

219 w->focusNextChild(); -

220

break;

never executed: break;

221

case QAbstractItemDelegate::EditPreviousItem:

never executed: case QAbstractItemDelegate::EditPreviousItem:

222 w->focusPreviousChild(); -

223

break;

never executed: break;

224

case QAbstractItemDelegate::SubmitModelCache:

never executed: case QAbstractItemDelegate::SubmitModelCache:

225

case QAbstractItemDelegate::NoHint:

never executed: case QAbstractItemDelegate::NoHint:

226 // nothing -

227

break;

never executed: break;

228 } -

229

}

never executed: end of block

230 -

231 void QDataWidgetMapperPrivate::_q_modelDestroyed() -

232 { -

233 Q_Q(QDataWidgetMapper); -

234 -

235 model = 0; -

236 q->setModel(QAbstractItemModelPrivate::staticEmptyModel()); -

237

}

never executed: end of block

238 -

239 /*! -

240 \class QDataWidgetMapper -

241 \brief The QDataWidgetMapper class provides mapping between a section -

242 of a data model to widgets. -

243 \since 4.2 -

244 \ingroup model-view -

245 \ingroup advanced -

246 \inmodule QtWidgets -

247 -

248 QDataWidgetMapper can be used to create data-aware widgets by mapping -

249 them to sections of an item model. A section is a column of a model -

250 if the orientation is horizontal (the default), otherwise a row. -

251 -

252 Every time the current index changes, each widget is updated with data -

253 from the model via the property specified when its mapping was made. -

254 If the user edits the contents of a widget, the changes are read using -

255 the same property and written back to the model. -

256 By default, each widget's \l{Q_PROPERTY()}{user property} is used to -

257 transfer data between the model and the widget. Since Qt 4.3, an -

258 additional addMapping() function enables a named property to be used -

259 instead of the default user property. -

260 -

261 It is possible to set an item delegate to support custom widgets. By default, -

262 a QItemDelegate is used to synchronize the model with the widgets. -

263 -

264 Let us assume that we have an item model named \c{model} with the following contents: -

265 -

266 \table -

267 \row \li 1 \li Qt Norway \li Oslo -

268 \row \li 2 \li Qt Australia \li Brisbane -

269 \row \li 3 \li Qt USA \li Palo Alto -

270 \row \li 4 \li Qt China \li Beijing -

271 \row \li 5 \li Qt Germany \li Berlin -

272 \endtable -

273 -

274 The following code will map the columns of the model to widgets called \c mySpinBox, -

275 \c myLineEdit and \c{myCountryChooser}: -

276 -

277 \snippet code/src_gui_itemviews_qdatawidgetmapper.cpp 0 -

278 -

279 After the call to toFirst(), \c mySpinBox displays the value \c{1}, \c myLineEdit -

280 displays \c{Qt Norway} and \c myCountryChooser displays \c{Oslo}. The -

281 navigational functions toFirst(), toNext(), toPrevious(), toLast() and setCurrentIndex() -

282 can be used to navigate in the model and update the widgets with contents from -

283 the model. -

284 -

285 The setRootIndex() function enables a particular item in a model to be -

286 specified as the root index - children of this item will be mapped to -

287 the relevant widgets in the user interface. -

288 -

289 QDataWidgetMapper supports two submit policies, \c AutoSubmit and \c{ManualSubmit}. -

290 \c AutoSubmit will update the model as soon as the current widget loses focus, -

291 \c ManualSubmit will not update the model unless submit() is called. \c ManualSubmit -

292 is useful when displaying a dialog that lets the user cancel all modifications. -

293 Also, other views that display the model won't update until the user finishes -

294 all their modifications and submits. -

295 -

296 Note that QDataWidgetMapper keeps track of external modifications. If the contents -

297 of the model are updated in another module of the application, the widgets are -

298 updated as well. -

299 -

300 \sa QAbstractItemModel, QAbstractItemDelegate -

301 */ -

302 -

303 /*! \enum QDataWidgetMapper::SubmitPolicy -

304 -

305 This enum describes the possible submit policies a QDataWidgetMapper -

306 supports. -

307 -

308 \value AutoSubmit Whenever a widget loses focus, the widget's current -

309 value is set to the item model. -

310 \value ManualSubmit The model is not updated until submit() is called. -

311 */ -

312 -

313 /*! -

314 \fn void QDataWidgetMapper::currentIndexChanged(int index) -

315 -

316 This signal is emitted after the current index has changed and -

317 all widgets were populated with new data. \a index is the new -

318 current index. -

319 -

320 \sa currentIndex(), setCurrentIndex() -

321 */ -

322 -

323 /*! -

324 Constructs a new QDataWidgetMapper with parent object \a parent. -

325 By default, the orientation is horizontal and the submit policy -

326 is \c{AutoSubmit}. -

327 -

328 \sa setOrientation(), setSubmitPolicy() -

329 */ -

330 QDataWidgetMapper::QDataWidgetMapper(QObject *parent) -

331 : QObject(*new QDataWidgetMapperPrivate, parent) -

332 { -

333 setItemDelegate(new QItemDelegate(this)); -

334

}

never executed: end of block

335 -

336 /*! -

337 Destroys the object. -

338 */ -

339 QDataWidgetMapper::~QDataWidgetMapper() -

340 { -

341 } -

342 -

343 /*! -

344 Sets the current model to \a model. If another model was set, -

345 all mappings to that old model are cleared. -

346 -

347 \sa model() -

348 */ -

349 void QDataWidgetMapper::setModel(QAbstractItemModel *model) -

350 { -

351 Q_D(QDataWidgetMapper); -

352 -

353

if (d->model == model)

d->model == model	Description
TRUE	never evaluated
FALSE	never evaluated

354

return;

never executed: return;

355 -

356

if (d->model) {

d->model	Description
TRUE	never evaluated
FALSE	never evaluated

357 disconnect(d->model, SIGNAL(dataChanged(QModelIndex,QModelIndex,QVector<int>)), this, -

358 SLOT(_q_dataChanged(QModelIndex,QModelIndex,QVector<int>))); -

359 disconnect(d->model, SIGNAL(destroyed()), this, -

360 SLOT(_q_modelDestroyed())); -

361

}

never executed: end of block

362 clearMapping(); -

363 d->rootIndex = QModelIndex(); -

364 d->currentTopLeft = QModelIndex(); -

365 -

366 d->model = model; -

367 -

368 connect(model, SIGNAL(dataChanged(QModelIndex,QModelIndex,QVector<int>)), -

369 SLOT(_q_dataChanged(QModelIndex,QModelIndex,QVector<int>))); -

370 connect(model, SIGNAL(destroyed()), SLOT(_q_modelDestroyed())); -

371

}

never executed: end of block

372 -

373 /*! -

374 Returns the current model. -

375 -

376 \sa setModel() -

377 */ -

378 QAbstractItemModel *QDataWidgetMapper::model() const -

379 { -

380 Q_D(const QDataWidgetMapper); -

381

return d->model == QAbstractItemModelPrivate::staticEmptyModel()

never executed: return d->model == QAbstractItemModelPrivate::staticEmptyModel() ? static_cast<QAbstractItemModel *>(0) : d->model;

382

? static_cast<QAbstractItemModel *>(0)

never executed: return d->model == QAbstractItemModelPrivate::staticEmptyModel() ? static_cast<QAbstractItemModel *>(0) : d->model;

383

: d->model;

never executed: return d->model == QAbstractItemModelPrivate::staticEmptyModel() ? static_cast<QAbstractItemModel *>(0) : d->model;

384 } -

385 -

386 /*! -

387 Sets the item delegate to \a delegate. The delegate will be used to write -

388 data from the model into the widget and from the widget to the model, -

389 using QAbstractItemDelegate::setEditorData() and QAbstractItemDelegate::setModelData(). -

390 -

391 The delegate also decides when to apply data and when to change the editor, -

392 using QAbstractItemDelegate::commitData() and QAbstractItemDelegate::closeEditor(). -

393 -

394 \warning You should not share the same instance of a delegate between widget mappers -

395 or views. Doing so can cause incorrect or unintuitive editing behavior since each -

396 view connected to a given delegate may receive the \l{QAbstractItemDelegate::}{closeEditor()} -

397 signal, and attempt to access, modify or close an editor that has already been closed. -

398 */ -

399 void QDataWidgetMapper::setItemDelegate(QAbstractItemDelegate *delegate) -

400 { -

401 Q_D(QDataWidgetMapper); -

402 QAbstractItemDelegate *oldDelegate = d->delegate; -

403

if (oldDelegate) {

oldDelegate	Description
TRUE	never evaluated
FALSE	never evaluated

404 disconnect(oldDelegate, SIGNAL(commitData(QWidget*)), this, SLOT(_q_commitData(QWidget*))); -

405 disconnect(oldDelegate, SIGNAL(closeEditor(QWidget*,QAbstractItemDelegate::EndEditHint)), -

406 this, SLOT(_q_closeEditor(QWidget*,QAbstractItemDelegate::EndEditHint))); -

407

}

never executed: end of block

408 -

409 d->delegate = delegate; -

410 -

411

if (delegate) {

delegate	Description
TRUE	never evaluated
FALSE	never evaluated

412 connect(delegate, SIGNAL(commitData(QWidget*)), SLOT(_q_commitData(QWidget*))); -

413 connect(delegate, SIGNAL(closeEditor(QWidget*,QAbstractItemDelegate::EndEditHint)), -

414 SLOT(_q_closeEditor(QWidget*,QAbstractItemDelegate::EndEditHint))); -

415

}

never executed: end of block

416 -

417 d->flipEventFilters(oldDelegate, delegate); -

418

}

never executed: end of block

419 -

420 /*! -

421 Returns the current item delegate. -

422 */ -

423 QAbstractItemDelegate *QDataWidgetMapper::itemDelegate() const -

424 { -

425 Q_D(const QDataWidgetMapper); -

426

return d->delegate;

never executed: return d->delegate;

427 } -

428 -

429 /*! -

430 Sets the root item to \a index. This can be used to display -

431 a branch of a tree. Pass an invalid model index to display -

432 the top-most branch. -

433 -

434 \sa rootIndex() -

435 */ -

436 void QDataWidgetMapper::setRootIndex(const QModelIndex &index) -

437 { -

438 Q_D(QDataWidgetMapper); -

439 d->rootIndex = index; -

440

}

never executed: end of block

441 -

442 /*! -

443 Returns the current root index. -

444 -

445 \sa setRootIndex() -

446 */ -

447 QModelIndex QDataWidgetMapper::rootIndex() const -

448 { -

449 Q_D(const QDataWidgetMapper); -

450

return QModelIndex(d->rootIndex);

never executed: return QModelIndex(d->rootIndex);

451 } -

452 -

453 /*! -

454 Adds a mapping between a \a widget and a \a section from the model. -

455 The \a section is a column in the model if the orientation is -

456 horizontal (the default), otherwise a row. -

457 -

458 For the following example, we assume a model \c myModel that -

459 has two columns: the first one contains the names of people in a -

460 group, and the second column contains their ages. The first column -

461 is mapped to the QLineEdit \c nameLineEdit, and the second is -

462 mapped to the QSpinBox \c{ageSpinBox}: -

463 -

464 \snippet code/src_gui_itemviews_qdatawidgetmapper.cpp 1 -

465 -

466 \b{Notes:} -

467 \list -

468 \li If the \a widget is already mapped to a section, the -

469 old mapping will be replaced by the new one. -

470 \li Only one-to-one mappings between sections and widgets are allowed. -

471 It is not possible to map a single section to multiple widgets, or to -

472 map a single widget to multiple sections. -

473 \endlist -

474 -

475 \sa removeMapping(), mappedSection(), clearMapping() -

476 */ -

477 void QDataWidgetMapper::addMapping(QWidget *widget, int section) -

478 { -

479 Q_D(QDataWidgetMapper); -

480 -

481 removeMapping(widget); -

482 d->widgetMap.append(QDataWidgetMapperPrivate::WidgetMapper(widget, section, d->indexAt(section))); -

483 widget->installEventFilter(d->delegate); -

484

}

never executed: end of block

485 -

486 /*! -

487 \since 4.3 -

488 -

489 Essentially the same as addMapping(), but adds the possibility to specify -

490 the property to use specifying \a propertyName. -

491 -

492 \sa addMapping() -

493 */ -

494 -

495 void QDataWidgetMapper::addMapping(QWidget *widget, int section, const QByteArray &propertyName) -

496 { -

497 Q_D(QDataWidgetMapper); -

498 -

499 removeMapping(widget); -

500 d->widgetMap.append(QDataWidgetMapperPrivate::WidgetMapper(widget, section, d->indexAt(section), propertyName)); -

501 widget->installEventFilter(d->delegate); -

502

}

never executed: end of block

503 -

504 /*! -

505 Removes the mapping for the given \a widget. -

506 -

507 \sa addMapping(), clearMapping() -

508 */ -

509 void QDataWidgetMapper::removeMapping(QWidget *widget) -

510 { -

511 Q_D(QDataWidgetMapper); -

512 -

513 int idx = d->findWidget(widget); -

514

if (idx == -1)

idx == -1	Description
TRUE	never evaluated
FALSE	never evaluated

515

return;

never executed: return;

516 -

517 d->widgetMap.removeAt(idx); -

518 widget->removeEventFilter(d->delegate); -

519

}

never executed: end of block

520 -

521 /*! -

522 Returns the section the \a widget is mapped to or -1 -

523 if the widget is not mapped. -

524 -

525 \sa addMapping(), removeMapping() -

526 */ -

527 int QDataWidgetMapper::mappedSection(QWidget *widget) const -

528 { -

529 Q_D(const QDataWidgetMapper); -

530 -

531 int idx = d->findWidget(widget); -

532

if (idx == -1)

idx == -1	Description
TRUE	never evaluated
FALSE	never evaluated

533

return -1;

never executed: return -1;

534 -

535

return d->widgetMap.at(idx).section;

never executed: return d->widgetMap.at(idx).section;

536 } -

537 -

538 /*! -

539 \since 4.3 -

540 Returns the name of the property that is used when mapping -

541 data to the given \a widget. -

542 -

543 \sa mappedSection(), addMapping(), removeMapping() -

544 */ -

545 -

546 QByteArray QDataWidgetMapper::mappedPropertyName(QWidget *widget) const -

547 { -

548 Q_D(const QDataWidgetMapper); -

549 -

550 int idx = d->findWidget(widget); -

551

if (idx == -1)

idx == -1	Description
TRUE	never evaluated
FALSE	never evaluated

552

return QByteArray();

never executed: return QByteArray();

553 const QDataWidgetMapperPrivate::WidgetMapper &m = d->widgetMap.at(idx); -

554

if (m.property.isEmpty())

m.property.isEmpty()	Description
TRUE	never evaluated
FALSE	never evaluated

555

return m.widget->metaObject()->userProperty().name();

never executed: return m.widget->metaObject()->userProperty().name();

556 else -

557

return m.property;

never executed: return m.property;

558 } -

559 -

560 /*! -

561 Returns the widget that is mapped at \a section, or -

562 0 if no widget is mapped at that section. -

563 -

564 \sa addMapping(), removeMapping() -

565 */ -

566 QWidget *QDataWidgetMapper::mappedWidgetAt(int section) const -

567 { -

568 Q_D(const QDataWidgetMapper); -

569 -

570

for (QList<QDataWidgetMapperPrivate::WidgetMapper>::const_iterator it = d->widgetMap.cbegin(), end = d->widgetMap.cend(); it != end; ++it) {

it != end	Description
TRUE	never evaluated
FALSE	never evaluated

571

if (it->section == section)

it->section == section	Description
TRUE	never evaluated
FALSE	never evaluated

572

return it->widget;

never executed: return it->widget;

573

}

never executed: end of block

574 -

575

return 0;

never executed: return 0;

576 } -

577 -

578 /*! -

579 Repopulates all widgets with the current data of the model. -

580 All unsubmitted changes will be lost. -

581 -

582 \sa submit(), setSubmitPolicy() -

583 */ -

584 void QDataWidgetMapper::revert() -

585 { -

586 Q_D(QDataWidgetMapper); -

587 -

588 d->populate(); -

589

}

never executed: end of block

590 -

591 /*! -

592 Submits all changes from the mapped widgets to the model. -

593 -

594 For every mapped section, the item delegate reads the current -

595 value from the widget and sets it in the model. Finally, the -

596 model's \l {QAbstractItemModel::}{submit()} method is invoked. -

597 -

598 Returns \c true if all the values were submitted, otherwise false. -

599 -

600 Note: For database models, QSqlQueryModel::lastError() can be -

601 used to retrieve the last error. -

602 -

603 \sa revert(), setSubmitPolicy() -

604 */ -

605 bool QDataWidgetMapper::submit() -

606 { -

607 Q_D(QDataWidgetMapper); -

608 -

609

for (QList<QDataWidgetMapperPrivate::WidgetMapper>::const_iterator it = d->widgetMap.cbegin(), end = d->widgetMap.cend(); it != end; ++it) {

it != end	Description
TRUE	never evaluated
FALSE	never evaluated

610

if (!d->commit(*it))

!d->commit(*it)	Description
TRUE	never evaluated
FALSE	never evaluated

611

return false;

never executed: return false;

612

}

never executed: end of block

613 -

614

return d->model->submit();

never executed: return d->model->submit();

615 } -

616 -

617 /*! -

618 Populates the widgets with data from the first row of the model -

619 if the orientation is horizontal (the default), otherwise -

620 with data from the first column. -

621 -

622 This is equivalent to calling \c setCurrentIndex(0). -

623 -

624 \sa toLast(), setCurrentIndex() -

625 */ -

626 void QDataWidgetMapper::toFirst() -

627 { -

628 setCurrentIndex(0); -

629

}

never executed: end of block

630 -

631 /*! -

632 Populates the widgets with data from the last row of the model -

633 if the orientation is horizontal (the default), otherwise -

634 with data from the last column. -

635 -

636 Calls setCurrentIndex() internally. -

637 -

638 \sa toFirst(), setCurrentIndex() -

639 */ -

640 void QDataWidgetMapper::toLast() -

641 { -

642 Q_D(QDataWidgetMapper); -

643 setCurrentIndex(d->itemCount() - 1); -

644

}

never executed: end of block

645 -

646 -

647 /*! -

648 Populates the widgets with data from the next row of the model -

649 if the orientation is horizontal (the default), otherwise -

650 with data from the next column. -

651 -

652 Calls setCurrentIndex() internally. Does nothing if there is -

653 no next row in the model. -

654 -

655 \sa toPrevious(), setCurrentIndex() -

656 */ -

657 void QDataWidgetMapper::toNext() -

658 { -

659 Q_D(QDataWidgetMapper); -

660 setCurrentIndex(d->currentIdx() + 1); -

661

}

never executed: end of block

662 -

663 /*! -

664 Populates the widgets with data from the previous row of the model -

665 if the orientation is horizontal (the default), otherwise -

666 with data from the previous column. -

667 -

668 Calls setCurrentIndex() internally. Does nothing if there is -

669 no previous row in the model. -

670 -

671 \sa toNext(), setCurrentIndex() -

672 */ -

673 void QDataWidgetMapper::toPrevious() -

674 { -

675 Q_D(QDataWidgetMapper); -

676 setCurrentIndex(d->currentIdx() - 1); -

677

}

never executed: end of block

678 -

679 /*! -

680 \property QDataWidgetMapper::currentIndex -

681 \brief the current row or column -

682 -

683 The widgets are populated with with data from the row at \a index -

684 if the orientation is horizontal (the default), otherwise with -

685 data from the column at \a index. -

686 -

687 \sa setCurrentModelIndex(), toFirst(), toNext(), toPrevious(), toLast() -

688 */ -

689 void QDataWidgetMapper::setCurrentIndex(int index) -

690 { -

691 Q_D(QDataWidgetMapper); -

692 -

693

if (index < 0 || index >= d->itemCount())

index < 0	Description
TRUE	never evaluated
FALSE	never evaluated

index >= d->itemCount()	Description
TRUE	never evaluated
FALSE	never evaluated

694

return;

never executed: return;

695

d->currentTopLeft = d->orientation == Qt::Horizontal

d->orientation...Qt::Horizontal	Description
TRUE	never evaluated
FALSE	never evaluated

696 ? d->model->index(index, 0, d->rootIndex) -

697 : d->model->index(0, index, d->rootIndex); -

698 d->populate(); -

699 -

700 emit currentIndexChanged(index); -

701

}

never executed: end of block

702 -

703 int QDataWidgetMapper::currentIndex() const -

704 { -

705 Q_D(const QDataWidgetMapper); -

706

return d->currentIdx();

never executed: return d->currentIdx();

707 } -

708 -

709 /*! -

710 Sets the current index to the row of the \a index if the -

711 orientation is horizontal (the default), otherwise to the -

712 column of the \a index. -

713 -

714 Calls setCurrentIndex() internally. This convenience slot can be -

715 connected to the signal \l -

716 {QItemSelectionModel::}{currentRowChanged()} or \l -

717 {QItemSelectionModel::}{currentColumnChanged()} of another view's -

718 \l {QItemSelectionModel}{selection model}. -

719 -

720 The following example illustrates how to update all widgets -

721 with new data whenever the selection of a QTableView named -

722 \c myTableView changes: -

723 -

724 \snippet code/src_gui_itemviews_qdatawidgetmapper.cpp 2 -

725 -

726 \sa currentIndex() -

727 */ -

728 void QDataWidgetMapper::setCurrentModelIndex(const QModelIndex &index) -

729 { -

730 Q_D(QDataWidgetMapper); -

731 -

732

if (!index.isValid()

!index.isValid()	Description
TRUE	never evaluated
FALSE	never evaluated

733

|| index.model() != d->model

index.model() != d->model	Description
TRUE	never evaluated
FALSE	never evaluated

734

|| index.parent() != d->rootIndex)

index.parent() != d->rootIndex	Description
TRUE	never evaluated
FALSE	never evaluated

735

return;

never executed: return;

736 -

737 setCurrentIndex(d->orientation == Qt::Horizontal ? index.row() : index.column()); -

738

}

never executed: end of block

739 -

740 /*! -

741 Clears all mappings. -

742 -

743 \sa addMapping(), removeMapping() -

744 */ -

745 void QDataWidgetMapper::clearMapping() -

746 { -

747 Q_D(QDataWidgetMapper); -

748 -

749 QList<QDataWidgetMapperPrivate::WidgetMapper> copy; -

750 d->widgetMap.swap(copy); // a C++98 move -

751

for (QList<QDataWidgetMapperPrivate::WidgetMapper>::const_reverse_iterator it = copy.crbegin(), end = copy.crend(); it != end; ++it) {

it != end	Description
TRUE	never evaluated
FALSE	never evaluated

752

if (it->widget)

it->widget	Description
TRUE	never evaluated
FALSE	never evaluated

753

it->widget->removeEventFilter(d->delegate);

never executed: it->widget->removeEventFilter(d->delegate);

754

}

never executed: end of block

755

}

never executed: end of block

756 -

757 /*! -

758 \property QDataWidgetMapper::orientation -

759 \brief the orientation of the model -

760 -

761 If the orientation is Qt::Horizontal (the default), a widget is -

762 mapped to a column of a data model. The widget will be populated -

763 with the model's data from its mapped column and the row that -

764 currentIndex() points at. -

765 -

766 Use Qt::Horizontal for tabular data that looks like this: -

767 -

768 \table -

769 \row \li 1 \li Qt Norway \li Oslo -

770 \row \li 2 \li Qt Australia \li Brisbane -

771 \row \li 3 \li Qt USA \li Silicon Valley -

772 \row \li 4 \li Qt China \li Beijing -

773 \row \li 5 \li Qt Germany \li Berlin -

774 \endtable -

775 -

776 If the orientation is set to Qt::Vertical, a widget is mapped to -

777 a row. Calling setCurrentIndex() will change the current column. -

778 The widget will be populates with the model's data from its -

779 mapped row and the column that currentIndex() points at. -

780 -

781 Use Qt::Vertical for tabular data that looks like this: -

782 -

783 \table -

784 \row \li 1 \li 2 \li 3 \li 4 \li 5 -

785 \row \li Qt Norway \li Qt Australia \li Qt USA \li Qt China \li Qt Germany -

786 \row \li Oslo \li Brisbane \li Silicon Valley \li Beijing \li Berlin -

787 \endtable -

788 -

789 Changing the orientation clears all existing mappings. -

790 */ -

791 void QDataWidgetMapper::setOrientation(Qt::Orientation orientation) -

792 { -

793 Q_D(QDataWidgetMapper); -

794 -

795

if (d->orientation == orientation)

d->orientation == orientation	Description
TRUE	never evaluated
FALSE	never evaluated

796

return;

never executed: return;

797 -

798 clearMapping(); -

799 d->orientation = orientation; -

800

}

never executed: end of block

801 -

802 Qt::Orientation QDataWidgetMapper::orientation() const -

803 { -

804 Q_D(const QDataWidgetMapper); -

805

return d->orientation;

never executed: return d->orientation;

806 } -

807 -

808 /*! -

809 \property QDataWidgetMapper::submitPolicy -

810 \brief the current submit policy -

811 -

812 Changing the current submit policy will revert all widgets -

813 to the current data from the model. -

814 */ -

815 void QDataWidgetMapper::setSubmitPolicy(SubmitPolicy policy) -

816 { -

817 Q_D(QDataWidgetMapper); -

818

if (policy == d->submitPolicy)

policy == d->submitPolicy	Description
TRUE	never evaluated
FALSE	never evaluated

819

return;

never executed: return;

820 -

821 revert(); -

822 d->submitPolicy = policy; -

823

}

never executed: end of block

824 -

825 QDataWidgetMapper::SubmitPolicy QDataWidgetMapper::submitPolicy() const -

826 { -

827 Q_D(const QDataWidgetMapper); -

828

return d->submitPolicy;

never executed: return d->submitPolicy;

829 } -

830 -

831 QT_END_NAMESPACE -

832 -

833 #include "moc_qdatawidgetmapper.cpp" -

834 -

835 #endif // QT_NO_DATAWIDGETMAPPER -

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