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qstyleditemdelegate.cpp

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39 -

40 #include "qstyleditemdelegate.h" -

41 -

42 #ifndef QT_NO_ITEMVIEWS -

43 #include <qabstractitemmodel.h> -

44 #include <qapplication.h> -

45 #include <qbrush.h> -

46 #include <qlineedit.h> -

47 #include <qtextedit.h> -

48 #include <qplaintextedit.h> -

49 #include <qpainter.h> -

50 #include <qpalette.h> -

51 #include <qpoint.h> -

52 #include <qrect.h> -

53 #include <qsize.h> -

54 #include <qstyle.h> -

55 #include <qdatetime.h> -

56 #include <qstyleoption.h> -

57 #include <qevent.h> -

58 #include <qpixmap.h> -

59 #include <qbitmap.h> -

60 #include <qpixmapcache.h> -

61 #include <qitemeditorfactory.h> -

62 #include <private/qitemeditorfactory_p.h> -

63 #include <qmetaobject.h> -

64 #include <qtextlayout.h> -

65 #include <private/qabstractitemdelegate_p.h> -

66 #include <private/qtextengine_p.h> -

67 #include <private/qlayoutengine_p.h> -

68 #include <qdebug.h> -

69 #include <qlocale.h> -

70 #include <qdialog.h> -

71 #include <qtableview.h> -

72 -

73 #include <limits.h> -

74 -

75 QT_BEGIN_NAMESPACE -

76 -

77 class QStyledItemDelegatePrivate : public QAbstractItemDelegatePrivate -

78 { -

79 Q_DECLARE_PUBLIC(QStyledItemDelegate) -

80 -

81 public: -

QStyledItemDelegatePrivate() : factory(0) { }

never executed: end of block

83 -

84 static const QWidget *widget(const QStyleOptionViewItem &option) -

85 { -

return option.widget;

never executed: return option.widget;

87 } -

88 -

89 const QItemEditorFactory *editorFactory() const -

90 { -

return factory ? factory : QItemEditorFactory::defaultFactory();

never executed: return factory ? factory : QItemEditorFactory::defaultFactory();

92 } -

93 -

94 QItemEditorFactory *factory; -

95 }; -

96 -

97 /*! -

98 \class QStyledItemDelegate -

99 -

100 \brief The QStyledItemDelegate class provides display and editing facilities for -

101 data items from a model. -

102 -

103 \ingroup model-view -

104 \inmodule QtWidgets -

105 -

106 \since 4.4 -

107 -

108 When displaying data from models in Qt item views, e.g., a -

109 QTableView, the individual items are drawn by a delegate. Also, -

110 when an item is edited, it provides an editor widget, which is -

111 placed on top of the item view while editing takes place. -

112 QStyledItemDelegate is the default delegate for all Qt item -

113 views, and is installed upon them when they are created. -

114 -

115 The QStyledItemDelegate class is one of the \l{Model/View Classes} -

116 and is part of Qt's \l{Model/View Programming}{model/view -

117 framework}. The delegate allows the display and editing of items -

118 to be developed independently from the model and view. -

119 -

120 The data of items in models are assigned an -

121 \l{Qt::}{ItemDataRole}; each item can store a QVariant for each -

122 role. QStyledItemDelegate implements display and editing for the -

123 most common datatypes expected by users, including booleans, -

124 integers, and strings. -

125 -

126 The data will be drawn differently depending on which role they -

127 have in the model. The following table describes the roles and the -

128 data types the delegate can handle for each of them. It is often -

129 sufficient to ensure that the model returns appropriate data for -

130 each of the roles to determine the appearance of items in views. -

131 -

132 \table -

133 \header \li Role \li Accepted Types -

134 \omit -

135 \row \li \l Qt::AccessibleDescriptionRole \li QString -

136 \row \li \l Qt::AccessibleTextRole \li QString -

137 \endomit -

138 \row \li \l Qt::BackgroundRole \li QBrush -

139 \row \li \l Qt::BackgroundColorRole \li QColor (obsolete; use Qt::BackgroundRole instead) -

140 \row \li \l Qt::CheckStateRole \li Qt::CheckState -

141 \row \li \l Qt::DecorationRole \li QIcon, QPixmap, QImage and QColor -

142 \row \li \l Qt::DisplayRole \li QString and types with a string representation -

143 \row \li \l Qt::EditRole \li See QItemEditorFactory for details -

144 \row \li \l Qt::FontRole \li QFont -

145 \row \li \l Qt::SizeHintRole \li QSize -

146 \omit -

147 \row \li \l Qt::StatusTipRole \li -

148 \endomit -

149 \row \li \l Qt::TextAlignmentRole \li Qt::Alignment -

150 \row \li \l Qt::ForegroundRole \li QBrush -

151 \row \li \l Qt::TextColorRole \li QColor (obsolete; use Qt::ForegroundRole instead) -

152 \omit -

153 \row \li \l Qt::ToolTipRole -

154 \row \li \l Qt::WhatsThisRole -

155 \endomit -

156 \endtable -

157 -

158 Editors are created with a QItemEditorFactory; a default static -

159 instance provided by QItemEditorFactory is installed on all item -

160 delegates. You can set a custom factory using -

161 setItemEditorFactory() or set a new default factory with -

162 QItemEditorFactory::setDefaultFactory(). It is the data stored in -

163 the item model with the \l{Qt::}{EditRole} that is edited. See the -

164 QItemEditorFactory class for a more high-level introduction to -

165 item editor factories. The \l{Color Editor Factory Example}{Color -

166 Editor Factory} example shows how to create custom editors with a -

167 factory. -

168 -

169 \section1 Subclassing QStyledItemDelegate -

170 -

171 If the delegate does not support painting of the data types you -

172 need or you want to customize the drawing of items, you need to -

173 subclass QStyledItemDelegate, and reimplement paint() and possibly -

174 sizeHint(). The paint() function is called individually for each -

175 item, and with sizeHint(), you can specify the hint for each -

176 of them. -

177 -

178 When reimplementing paint(), one would typically handle the -

179 datatypes one would like to draw and use the superclass -

180 implementation for other types. -

181 -

182 The painting of check box indicators are performed by the current -

183 style. The style also specifies the size and the bounding -

184 rectangles in which to draw the data for the different data roles. -

185 The bounding rectangle of the item itself is also calculated by -

186 the style. When drawing already supported datatypes, it is -

187 therefore a good idea to ask the style for these bounding -

188 rectangles. The QStyle class description describes this in -

189 more detail. -

190 -

191 If you wish to change any of the bounding rectangles calculated by -

192 the style or the painting of check box indicators, you can -

193 subclass QStyle. Note, however, that the size of the items can -

194 also be affected by reimplementing sizeHint(). -

195 -

196 It is possible for a custom delegate to provide editors -

197 without the use of an editor item factory. In this case, the -

198 following virtual functions must be reimplemented: -

199 -

200 \list -

201 \li createEditor() returns the widget used to change data from the model -

202 and can be reimplemented to customize editing behavior. -

203 \li setEditorData() provides the widget with data to manipulate. -

204 \li updateEditorGeometry() ensures that the editor is displayed correctly -

205 with respect to the item view. -

206 \li setModelData() returns updated data to the model. -

207 \endlist -

208 -

209 The \l{Star Delegate Example}{Star Delegate} example creates -

210 editors by reimplementing these methods. -

211 -

212 \section1 QStyledItemDelegate vs. QItemDelegate -

213 -

214 Since Qt 4.4, there are two delegate classes: QItemDelegate and -

215 QStyledItemDelegate. However, the default delegate is QStyledItemDelegate. -

216 These two classes are independent alternatives to painting and providing -

217 editors for items in views. The difference between them is that -

218 QStyledItemDelegate uses the current style to paint its items. We therefore -

219 recommend using QStyledItemDelegate as the base class when implementing -

220 custom delegates or when working with Qt style sheets. The code required -

221 for either class should be equal unless the custom delegate needs to use -

222 the style for drawing. -

223 -

224 If you wish to customize the painting of item views, you should -

225 implement a custom style. Please see the QStyle class -

226 documentation for details. -

227 -

228 \sa {Delegate Classes}, QItemDelegate, QAbstractItemDelegate, QStyle, -

229 {Spin Box Delegate Example}, {Star Delegate Example}, {Color -

230 Editor Factory Example} -

231 */ -

232 -

233 -

234 /*! -

235 Constructs an item delegate with the given \a parent. -

236 */ -

237 QStyledItemDelegate::QStyledItemDelegate(QObject *parent) -

238 : QAbstractItemDelegate(*new QStyledItemDelegatePrivate(), parent) -

239 { -

240

}

never executed: end of block

241 -

242 /*! -

243 Destroys the item delegate. -

244 */ -

245 QStyledItemDelegate::~QStyledItemDelegate() -

246 { -

247 } -

248 -

249 /*! -

250 This function returns the string that the delegate will use to display the -

251 Qt::DisplayRole of the model in \a locale. \a value is the value of the Qt::DisplayRole -

252 provided by the model. -

253 -

254 The default implementation uses the QLocale::toString to convert \a value into -

255 a QString. -

256 -

257 This function is not called for empty model indices, i.e., indices for which -

258 the model returns an invalid QVariant. -

259 -

260 \sa QAbstractItemModel::data() -

261 */ -

262 QString QStyledItemDelegate::displayText(const QVariant &value, const QLocale& locale) const -

263 { -

264

return d_func()->textForRole(Qt::DisplayRole, value, locale);

never executed: return d_func()->textForRole(Qt::DisplayRole, value, locale);

265 } -

266 -

267 /*! -

268 Initialize \a option with the values using the index \a index. This method -

269 is useful for subclasses when they need a QStyleOptionViewItem, but don't want -

270 to fill in all the information themselves. -

271 -

272 \sa QStyleOption::initFrom() -

273 */ -

274 void QStyledItemDelegate::initStyleOption(QStyleOptionViewItem *option, -

275 const QModelIndex &index) const -

276 { -

277 QVariant value = index.data(Qt::FontRole); -

278

if (value.isValid() && !value.isNull()) {

value.isValid()	Description
TRUE	never evaluated
FALSE	never evaluated

!value.isNull()	Description
TRUE	never evaluated
FALSE	never evaluated

279 option->font = qvariant_cast<QFont>(value).resolve(option->font); -

280 option->fontMetrics = QFontMetrics(option->font); -

281

}

never executed: end of block

282 -

283 value = index.data(Qt::TextAlignmentRole); -

284

if (value.isValid() && !value.isNull())

value.isValid()	Description
TRUE	never evaluated
FALSE	never evaluated

!value.isNull()	Description
TRUE	never evaluated
FALSE	never evaluated

285

option->displayAlignment = Qt::Alignment(value.toInt());

never executed: option->displayAlignment = Qt::Alignment(value.toInt());

286 -

287 value = index.data(Qt::ForegroundRole); -

288

if (value.canConvert<QBrush>())

value.canConvert<QBrush>()	Description
TRUE	never evaluated
FALSE	never evaluated

289

option->palette.setBrush(QPalette::Text, qvariant_cast<QBrush>(value));

never executed: option->palette.setBrush(QPalette::Text, qvariant_cast<QBrush>(value));

290 -

291 option->index = index; -

292 value = index.data(Qt::CheckStateRole); -

293

if (value.isValid() && !value.isNull()) {

value.isValid()	Description
TRUE	never evaluated
FALSE	never evaluated

!value.isNull()	Description
TRUE	never evaluated
FALSE	never evaluated

294 option->features |= QStyleOptionViewItem::HasCheckIndicator; -

295 option->checkState = static_cast<Qt::CheckState>(value.toInt()); -

296

}

never executed: end of block

297 -

298 value = index.data(Qt::DecorationRole); -

299

if (value.isValid() && !value.isNull()) {

value.isValid()	Description
TRUE	never evaluated
FALSE	never evaluated

!value.isNull()	Description
TRUE	never evaluated
FALSE	never evaluated

300 option->features |= QStyleOptionViewItem::HasDecoration; -

301 switch (value.type()) { -

302

case QVariant::Icon: {

never executed: case QVariant::Icon:

303 option->icon = qvariant_cast<QIcon>(value); -

304 QIcon::Mode mode; -

305

if (!(option->state & QStyle::State_Enabled))

!(option->stat...State_Enabled)	Description
TRUE	never evaluated
FALSE	never evaluated

306

mode = QIcon::Disabled;

never executed: mode = QIcon::Disabled;

307

else if (option->state & QStyle::State_Selected)

option->state ...State_Selected	Description
TRUE	never evaluated
FALSE	never evaluated

308

mode = QIcon::Selected;

never executed: mode = QIcon::Selected;

309 else -

310

mode = QIcon::Normal;

never executed: mode = QIcon::Normal;

311

QIcon::State state = option->state & QStyle::State_Open ? QIcon::On : QIcon::Off;

option->state ...le::State_Open	Description
TRUE	never evaluated
FALSE	never evaluated

312 QSize actualSize = option->icon.actualSize(option->decorationSize, mode, state); -

313 // For highdpi icons actualSize might be larger than decorationSize, which we don't want. Clamp it to decorationSize. -

314 option->decorationSize = QSize(qMin(option->decorationSize.width(), actualSize.width()), -

315 qMin(option->decorationSize.height(), actualSize.height())); -

316

break;

never executed: break;

317 } -

318

case QVariant::Color: {

never executed: case QVariant::Color:

319 QPixmap pixmap(option->decorationSize); -

320 pixmap.fill(qvariant_cast<QColor>(value)); -

321 option->icon = QIcon(pixmap); -

322

break;

never executed: break;

323 } -

324

case QVariant::Image: {

never executed: case QVariant::Image:

325 QImage image = qvariant_cast<QImage>(value); -

326 option->icon = QIcon(QPixmap::fromImage(image)); -

327 option->decorationSize = image.size() / image.devicePixelRatio(); -

328

break;

never executed: break;

329 } -

330

case QVariant::Pixmap: {

never executed: case QVariant::Pixmap:

331 QPixmap pixmap = qvariant_cast<QPixmap>(value); -

332 option->icon = QIcon(pixmap); -

333 option->decorationSize = pixmap.size() / pixmap.devicePixelRatio(); -

334

break;

never executed: break;

335 } -

336

default:

never executed: default:

337

break;

never executed: break;

338 } -

339 } -

340 -

341 value = index.data(Qt::DisplayRole); -

342

if (value.isValid() && !value.isNull()) {

value.isValid()	Description
TRUE	never evaluated
FALSE	never evaluated

!value.isNull()	Description
TRUE	never evaluated
FALSE	never evaluated

343 option->features |= QStyleOptionViewItem::HasDisplay; -

344 option->text = displayText(value, option->locale); -

345

}

never executed: end of block

346 -

347 option->backgroundBrush = qvariant_cast<QBrush>(index.data(Qt::BackgroundRole)); -

348 -

349 // disable style animations for checkboxes etc. within itemviews (QTBUG-30146) -

350 option->styleObject = 0; -

351

}

never executed: end of block

352 -

353 /*! -

354 Renders the delegate using the given \a painter and style \a option for -

355 the item specified by \a index. -

356 -

357 This function paints the item using the view's QStyle. -

358 -

359 When reimplementing paint in a subclass. Use the initStyleOption() -

360 to set up the \a option in the same way as the -

361 QStyledItemDelegate. -

362 -

363 Whenever possible, use the \a option while painting. -

364 Especially its \l{QStyleOption::}{rect} variable to decide -

365 where to draw and its \l{QStyleOption::}{state} to determine -

366 if it is enabled or selected. -

367 -

368 After painting, you should ensure that the painter is returned to -

369 the state it was supplied in when this function was called. -

370 For example, it may be useful to call QPainter::save() before -

371 painting and QPainter::restore() afterwards. -

372 -

373 \sa QItemDelegate::paint(), QStyle::drawControl(), QStyle::CE_ItemViewItem -

374 */ -

375 void QStyledItemDelegate::paint(QPainter *painter, -

376 const QStyleOptionViewItem &option, const QModelIndex &index) const -

377 { -

378 Q_ASSERT(index.isValid()); -

379 -

380 QStyleOptionViewItem opt = option; -

381 initStyleOption(&opt, index); -

382 -

383 const QWidget *widget = QStyledItemDelegatePrivate::widget(option); -

384

QStyle *style = widget ? widget->style() : QApplication::style();

widget	Description
TRUE	never evaluated
FALSE	never evaluated

385 style->drawControl(QStyle::CE_ItemViewItem, &opt, painter, widget); -

386

}

never executed: end of block

387 -

388 /*! -

389 Returns the size needed by the delegate to display the item -

390 specified by \a index, taking into account the style information -

391 provided by \a option. -

392 -

393 This function uses the view's QStyle to determine the size of the -

394 item. -

395 -

396 \sa QStyle::sizeFromContents(), QStyle::CT_ItemViewItem -

397 */ -

398 QSize QStyledItemDelegate::sizeHint(const QStyleOptionViewItem &option, -

399 const QModelIndex &index) const -

400 { -

401 QVariant value = index.data(Qt::SizeHintRole); -

402

if (value.isValid())

value.isValid()	Description
TRUE	never evaluated
FALSE	never evaluated

403

return qvariant_cast<QSize>(value);

never executed: return qvariant_cast<QSize>(value);

404 -

405 QStyleOptionViewItem opt = option; -

406 initStyleOption(&opt, index); -

407 const QWidget *widget = QStyledItemDelegatePrivate::widget(option); -

408

QStyle *style = widget ? widget->style() : QApplication::style();

widget	Description
TRUE	never evaluated
FALSE	never evaluated

409

return style->sizeFromContents(QStyle::CT_ItemViewItem, &opt, QSize(), widget);

never executed: return style->sizeFromContents(QStyle::CT_ItemViewItem, &opt, QSize(), widget);

410 } -

411 -

412 /*! -

413 Returns the widget used to edit the item specified by \a index -

414 for editing. The \a parent widget and style \a option are used to -

415 control how the editor widget appears. -

416 -

417 \sa QAbstractItemDelegate::createEditor() -

418 */ -

419 QWidget *QStyledItemDelegate::createEditor(QWidget *parent, -

420 const QStyleOptionViewItem &, -

421 const QModelIndex &index) const -

422 { -

423 Q_D(const QStyledItemDelegate); -

424

if (!index.isValid())

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

425

return 0;

never executed: return 0;

426

return d->editorFactory()->createEditor(index.data(Qt::EditRole).userType(), parent);

never executed: return d->editorFactory()->createEditor(index.data(Qt::EditRole).userType(), parent);

427 } -

428 -

429 /*! -

430 Sets the data to be displayed and edited by the \a editor from the -

431 data model item specified by the model \a index. -

432 -

433 The default implementation stores the data in the \a editor -

434 widget's \l {Qt's Property System} {user property}. -

435 -

436 \sa QMetaProperty::isUser() -

437 */ -

438 void QStyledItemDelegate::setEditorData(QWidget *editor, const QModelIndex &index) const -

439 { -

440 #ifdef QT_NO_PROPERTIES -

441 Q_UNUSED(editor); -

442 Q_UNUSED(index); -

443 #else -

444 QVariant v = index.data(Qt::EditRole); -

445 QByteArray n = editor->metaObject()->userProperty().name(); -

446 -

447

if (!n.isEmpty()) {

!n.isEmpty()	Description
TRUE	never evaluated
FALSE	never evaluated

448

if (!v.isValid())

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

449

v = QVariant(editor->property(n).userType(), (const void *)0);

never executed: v = QVariant(editor->property(n).userType(), (const void *)0);

450 editor->setProperty(n, v); -

451

}

never executed: end of block

452 #endif -

453

}

never executed: end of block

454 -

455 /*! -

456 Gets data from the \a editor widget and stores it in the specified -

457 \a model at the item \a index. -

458 -

459 The default implementation gets the value to be stored in the data -

460 model from the \a editor widget's \l {Qt's Property System} {user -

461 property}. -

462 -

463 \sa QMetaProperty::isUser() -

464 */ -

465 void QStyledItemDelegate::setModelData(QWidget *editor, -

466 QAbstractItemModel *model, -

467 const QModelIndex &index) const -

468 { -

469 #ifdef QT_NO_PROPERTIES -

470 Q_UNUSED(model); -

471 Q_UNUSED(editor); -

472 Q_UNUSED(index); -

473 #else -

474 Q_D(const QStyledItemDelegate); -

475 Q_ASSERT(model); -

476 Q_ASSERT(editor); -

477 QByteArray n = editor->metaObject()->userProperty().name(); -

478

if (n.isEmpty())

n.isEmpty()	Description
TRUE	never evaluated
FALSE	never evaluated

479

n = d->editorFactory()->valuePropertyName(

never executed: n = d->editorFactory()->valuePropertyName( model->data(index, Qt::EditRole).userType());

480

model->data(index, Qt::EditRole).userType());

never executed: n = d->editorFactory()->valuePropertyName( model->data(index, Qt::EditRole).userType());

481

if (!n.isEmpty())

!n.isEmpty()	Description
TRUE	never evaluated
FALSE	never evaluated

482

model->setData(index, editor->property(n), Qt::EditRole);

never executed: model->setData(index, editor->property(n), Qt::EditRole);

483 #endif -

484

}

never executed: end of block

485 -

486 /*! -

487 Updates the \a editor for the item specified by \a index -

488 according to the style \a option given. -

489 */ -

490 void QStyledItemDelegate::updateEditorGeometry(QWidget *editor, -

491 const QStyleOptionViewItem &option, -

492 const QModelIndex &index) const -

493 { -

494

if (!editor)

!editor	Description
TRUE	never evaluated
FALSE	never evaluated

495

return;

never executed: return;

496 Q_ASSERT(index.isValid()); -

497 const QWidget *widget = QStyledItemDelegatePrivate::widget(option); -

498 -

499 QStyleOptionViewItem opt = option; -

500 initStyleOption(&opt, index); -

501 // let the editor take up all available space -

502 //if the editor is not a QLineEdit -

503 //or it is in a QTableView -

504 #if !defined(QT_NO_TABLEVIEW) && !defined(QT_NO_LINEEDIT) -

505

if (qobject_cast<QExpandingLineEdit*>(editor) && !qobject_cast<const QTableView*>(widget))

qobject_cast<Q...Edit*>(editor)	Description
TRUE	never evaluated
FALSE	never evaluated

!qobject_cast<...View*>(widget)	Description
TRUE	never evaluated
FALSE	never evaluated

506

opt.showDecorationSelected = editor->style()->styleHint(QStyle::SH_ItemView_ShowDecorationSelected, 0, editor);

never executed: opt.showDecorationSelected = editor->style()->styleHint(QStyle::SH_ItemView_ShowDecorationSelected, 0, editor);

507 else -

508 #endif -

509

opt.showDecorationSelected = true;

never executed: opt.showDecorationSelected = true;

510 -

511

QStyle *style = widget ? widget->style() : QApplication::style();

widget	Description
TRUE	never evaluated
FALSE	never evaluated

512 QRect geom = style->subElementRect(QStyle::SE_ItemViewItemText, &opt, widget); -

513

if ( editor->layoutDirection() == Qt::RightToLeft) {

editor->layout...t::RightToLeft	Description
TRUE	never evaluated
FALSE	never evaluated

514 const int delta = qSmartMinSize(editor).width() - geom.width(); -

515

if (delta > 0) {

delta > 0	Description
TRUE	never evaluated
FALSE	never evaluated

516 //we need to widen the geometry -

517 geom.adjust(-delta, 0, 0, 0); -

518

}

never executed: end of block

519

}

never executed: end of block

520 -

521 editor->setGeometry(geom); -

522

}

never executed: end of block

523 -

524 /*! -

525 Returns the editor factory used by the item delegate. -

526 If no editor factory is set, the function will return null. -

527 -

528 \sa setItemEditorFactory() -

529 */ -

530 QItemEditorFactory *QStyledItemDelegate::itemEditorFactory() const -

531 { -

532 Q_D(const QStyledItemDelegate); -

533

return d->factory;

never executed: return d->factory;

534 } -

535 -

536 /*! -

537 Sets the editor factory to be used by the item delegate to be the \a factory -

538 specified. If no editor factory is set, the item delegate will use the -

539 default editor factory. -

540 -

541 \sa itemEditorFactory() -

542 */ -

543 void QStyledItemDelegate::setItemEditorFactory(QItemEditorFactory *factory) -

544 { -

545 Q_D(QStyledItemDelegate); -

546 d->factory = factory; -

547

}

never executed: end of block

548 -

549 -

550 /*! -

551 \fn bool QStyledItemDelegate::eventFilter(QObject *editor, QEvent *event) -

552 -

553 Returns \c true if the given \a editor is a valid QWidget and the -

554 given \a event is handled; otherwise returns \c false. The following -

555 key press events are handled by default: -

556 -

557 \list -

558 \li \uicontrol Tab -

559 \li \uicontrol Backtab -

560 \li \uicontrol Enter -

561 \li \uicontrol Return -

562 \li \uicontrol Esc -

563 \endlist -

564 -

565 If the \a editor's type is QTextEdit or QPlainTextEdit then \uicontrol Enter and -

566 \uicontrol Return keys are \e not handled. -

567 -

568 In the case of \uicontrol Tab, \uicontrol Backtab, \uicontrol Enter and \uicontrol Return -

569 key press events, the \a editor's data is comitted to the model -

570 and the editor is closed. If the \a event is a \uicontrol Tab key press -

571 the view will open an editor on the next item in the -

572 view. Likewise, if the \a event is a \uicontrol Backtab key press the -

573 view will open an editor on the \e previous item in the view. -

574 -

575 If the event is a \uicontrol Esc key press event, the \a editor is -

576 closed \e without committing its data. -

577 -

578 \sa commitData(), closeEditor() -

579 */ -

580 bool QStyledItemDelegate::eventFilter(QObject *object, QEvent *event) -

581 { -

582 Q_D(QStyledItemDelegate); -

583

return d->editorEventFilter(object, event);

never executed: return d->editorEventFilter(object, event);

584 } -

585 -

586 /*! -

587 \reimp -

588 */ -

589 bool QStyledItemDelegate::editorEvent(QEvent *event, -

590 QAbstractItemModel *model, -

591 const QStyleOptionViewItem &option, -

592 const QModelIndex &index) -

593 { -

594 Q_ASSERT(event); -

595 Q_ASSERT(model); -

596 -

597 // make sure that the item is checkable -

598 Qt::ItemFlags flags = model->flags(index); -

599

if (!(flags & Qt::ItemIsUserCheckable) || !(option.state & QStyle::State_Enabled)

!(flags & Qt::...UserCheckable)	Description
TRUE	never evaluated
FALSE	never evaluated

!(option.state...State_Enabled)	Description
TRUE	never evaluated
FALSE	never evaluated

600

|| !(flags & Qt::ItemIsEnabled))

!(flags & Qt::ItemIsEnabled)	Description
TRUE	never evaluated
FALSE	never evaluated

601

return false;

never executed: return false;

602 -

603 // make sure that we have a check state -

604 QVariant value = index.data(Qt::CheckStateRole); -

605

if (!value.isValid())

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

606

return false;

never executed: return false;

607 -

608 const QWidget *widget = QStyledItemDelegatePrivate::widget(option); -

609

QStyle *style = widget ? widget->style() : QApplication::style();

widget	Description
TRUE	never evaluated
FALSE	never evaluated

610 -

611 // make sure that we have the right event type -

612

if ((event->type() == QEvent::MouseButtonRelease)

(event->type()...ButtonRelease)	Description
TRUE	never evaluated
FALSE	never evaluated

613

|| (event->type() == QEvent::MouseButtonDblClick)

(event->type()...uttonDblClick)	Description
TRUE	never evaluated
FALSE	never evaluated

614

|| (event->type() == QEvent::MouseButtonPress)) {

(event->type()...seButtonPress)	Description
TRUE	never evaluated
FALSE	never evaluated

615 QStyleOptionViewItem viewOpt(option); -

616 initStyleOption(&viewOpt, index); -

617 QRect checkRect = style->subElementRect(QStyle::SE_ItemViewItemCheckIndicator, &viewOpt, widget); -

618 QMouseEvent *me = static_cast<QMouseEvent*>(event); -

619

if (me->button() != Qt::LeftButton || !checkRect.contains(me->pos()))

me->button() != Qt::LeftButton	Description
TRUE	never evaluated
FALSE	never evaluated

!checkRect.contains(me->pos())	Description
TRUE	never evaluated
FALSE	never evaluated

620

return false;

never executed: return false;

621 -

622

if ((event->type() == QEvent::MouseButtonPress)

(event->type()...seButtonPress)	Description
TRUE	never evaluated
FALSE	never evaluated

623

|| (event->type() == QEvent::MouseButtonDblClick))

(event->type()...uttonDblClick)	Description
TRUE	never evaluated
FALSE	never evaluated

624

return true;

never executed: return true;

625 -

626

} else if (event->type() == QEvent::KeyPress) {

never executed: end of block

event->type() ...vent::KeyPress	Description
TRUE	never evaluated
FALSE	never evaluated

627

if (static_cast<QKeyEvent*>(event)->key() != Qt::Key_Space

static_cast<QK... Qt::Key_Space	Description
TRUE	never evaluated
FALSE	never evaluated

628

&& static_cast<QKeyEvent*>(event)->key() != Qt::Key_Select)

static_cast<QK...Qt::Key_Select	Description
TRUE	never evaluated
FALSE	never evaluated

629

return false;

never executed: return false;

630

} else {

never executed: end of block

631

return false;

never executed: return false;

632 } -

633 -

634 Qt::CheckState state = static_cast<Qt::CheckState>(value.toInt()); -

635

if (flags & Qt::ItemIsUserTristate)

flags & Qt::ItemIsUserTristate	Description
TRUE	never evaluated
FALSE	never evaluated

636

state = ((Qt::CheckState)((state + 1) % 3));

never executed: state = ((Qt::CheckState)((state + 1) % 3));

637 else -

638

state = (state == Qt::Checked) ? Qt::Unchecked : Qt::Checked;

never executed: state = (state == Qt::Checked) ? Qt::Unchecked : Qt::Checked;

(state == Qt::Checked)	Description
TRUE	never evaluated
FALSE	never evaluated

639

return model->setData(index, state, Qt::CheckStateRole);

never executed: return model->setData(index, state, Qt::CheckStateRole);

640 } -

641 -

642 QT_END_NAMESPACE -

643 -

644 #include "moc_qstyleditemdelegate.cpp" -

645 -

646 #endif // QT_NO_ITEMVIEWS -

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