qline.cpp

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33 -

34 #include "qline.h" -

35 #include "qdebug.h" -

36 #include "qdatastream.h" -

37 #include "qmath.h" -

38 #include <private/qnumeric_p.h> -

39 -

40 QT_BEGIN_NAMESPACE -

41 -

42 /*! -

43 \class QLine -

44 \inmodule QtCore -

45 \ingroup painting -

46 -

47 \brief The QLine class provides a two-dimensional vector using -

48 integer precision. -

49 -

50 A QLine describes a finite length line (or a line segment) on a -

51 two-dimensional surface. The start and end points of the line are -

52 specified using integer point accuracy for coordinates. Use the -

53 QLineF constructor to retrieve a floating point copy. -

54 -

55 \table -

56 \row -

57 \li \inlineimage qline-point.png -

58 \li \inlineimage qline-coordinates.png -

59 \endtable -

60 -

61 The positions of the line's start and end points can be retrieved -

62 using the p1(), x1(), y1(), p2(), x2(), and y2() functions. The -

63 dx() and dy() functions return the horizontal and vertical -

64 components of the line. Use isNull() to determine whether the -

65 QLine represents a valid line or a null line. -

66 -

67 Finally, the line can be translated a given offset using the -

68 translate() function. -

69 -

70 \sa QLineF, QPolygon, QRect -

71 */ -

72 -

73 /*! -

74 \fn QLine::QLine() -

75 -

76 Constructs a null line. -

77 */ -

78 -

79 /*! -

80 \fn QLine::QLine(const QPoint &p1, const QPoint &p2) -

81 -

82 Constructs a line object that represents the line between \a p1 and -

83 \a p2. -

84 */ -

85 -

86 /*! -

87 \fn QLine::QLine(int x1, int y1, int x2, int y2) -

88 -

89 Constructs a line object that represents the line between (\a x1, \a y1) and -

90 (\a x2, \a y2). -

91 */ -

92 -

93 /*! -

94 \fn bool QLine::isNull() const -

95 -

96 Returns \c true if the line is not set up with valid start and end point; -

97 otherwise returns \c false. -

98 */ -

99 -

100 /*! -

101 \fn QPoint QLine::p1() const -

102 -

103 Returns the line's start point. -

104 -

105 \sa x1(), y1(), p2() -

106 */ -

107 -

108 /*! -

109 \fn QPoint QLine::p2() const -

110 -

111 Returns the line's end point. -

112 -

113 \sa x2(), y2(), p1() -

114 */ -

115 -

116 /*! -

117 \fn int QLine::x1() const -

118 -

119 Returns the x-coordinate of the line's start point. -

120 -

121 \sa p1() -

122 */ -

123 -

124 /*! -

125 \fn int QLine::y1() const -

126 -

127 Returns the y-coordinate of the line's start point. -

128 -

129 \sa p1() -

130 */ -

131 -

132 /*! -

133 \fn int QLine::x2() const -

134 -

135 Returns the x-coordinate of the line's end point. -

136 -

137 \sa p2() -

138 */ -

139 -

140 /*! -

141 \fn int QLine::y2() const -

142 -

143 Returns the y-coordinate of the line's end point. -

144 -

145 \sa p2() -

146 */ -

147 -

148 /*! -

149 \fn int QLine::dx() const -

150 -

151 Returns the horizontal component of the line's vector. -

152 -

153 \sa dy() -

154 */ -

155 -

156 /*! -

157 \fn int QLine::dy() const -

158 -

159 Returns the vertical component of the line's vector. -

160 -

161 \sa dx() -

162 */ -

163 -

164 /*! -

165 \fn bool QLine::operator!=(const QLine &line) const -

166 -

167 Returns \c true if the given \a line is not the same as \e this line. -

168 -

169 A line is different from another line if any of their start or -

170 end points differ, or the internal order of the points is different. -

171 */ -

172 -

173 /*! -

174 \fn bool QLine::operator==(const QLine &line) const -

175 -

176 Returns \c true if the given \a line is the same as \e this line. -

177 -

178 A line is identical to another line if the start and end points -

179 are identical, and the internal order of the points is the same. -

180 */ -

181 -

182 /*! -

183 \fn void QLine::translate(const QPoint &offset) -

184 -

185 Translates this line by the given \a offset. -

186 */ -

187 -

188 /*! -

189 \fn void QLine::translate(int dx, int dy) -

190 \overload -

191 -

192 Translates this line the distance specified by \a dx and \a dy. -

193 */ -

194 -

195 /*! -

196 \fn QLine QLine::translated(const QPoint &offset) const -

197 -

198 \since 4.4 -

199 -

200 Returns this line translated by the given \a offset. -

201 */ -

202 -

203 /*! -

204 \fn QLine QLine::translated(int dx, int dy) const -

205 \overload -

206 \since 4.4 -

207 -

208 Returns this line translated the distance specified by \a dx and \a dy. -

209 */ -

210 -

211 -

212 /*! -

213 \fn void QLine::setP1(const QPoint &p1) -

214 \since 4.4 -

215 -

216 Sets the starting point of this line to \a p1. -

217 -

218 \sa setP2(), p1() -

219 */ -

220 -

221 -

222 /*! -

223 \fn void QLine::setP2(const QPoint &p2) -

224 \since 4.4 -

225 -

226 Sets the end point of this line to \a p2. -

227 -

228 \sa setP1(), p2() -

229 */ -

230 -

231 -

232 /*! -

233 \fn void QLine::setPoints(const QPoint &p1, const QPoint &p2) -

234 \since 4.4 -

235 -

236 Sets the start point of this line to \a p1 and the end point of this line to \a p2. -

237 -

238 \sa setP1(), setP2(), p1(), p2() -

239 */ -

240 -

241 -

242 /*! -

243 \fn void QLine::setLine(int x1, int y1, int x2, int y2) -

244 \since 4.4 -

245 -

246 Sets this line to the start in \a x1, \a y1 and end in \a x2, \a y2. -

247 -

248 \sa setP1(), setP2(), p1(), p2() -

249 */ -

250 -

251 -

252 -

253 #ifndef QT_NO_DEBUG_STREAM -

254 QDebug operator<<(QDebug dbg, const QLine &p) -

255 { -

256 QDebugStateSaver saver(dbg); -

257 dbg.nospace() << "QLine(" << p.p1() << ',' << p.p2() << ')'; -

258

return dbg;

executed 2 times by 2 tests: return dbg;

Executed by:

tst_QDebug
tst_QVariant

259 } -

260 #endif -

261 -

262 #ifndef QT_NO_DATASTREAM -

263 /*! -

264 \relates QLine -

265 -

266 Writes the given \a line to the given \a stream and returns a -

267 reference to the stream. -

268 -

269 \sa {Serializing Qt Data Types} -

270 */ -

271 -

272 QDataStream &operator<<(QDataStream &stream, const QLine &line) -

273 { -

274 stream << line.p1() << line.p2(); -

275

return stream;

executed 3 times by 2 tests: return stream;

Executed by:

tst_QMetaType
tst_QVariant

276 } -

277 -

278 /*! -

279 \relates QLine -

280 -

281 Reads a line from the given \a stream into the given \a line and -

282 returns a reference to the stream. -

283 -

284 \sa {Serializing Qt Data Types} -

285 */ -

286 -

287 QDataStream &operator>>(QDataStream &stream, QLine &line) -

288 { -

289 QPoint p1, p2; -

290 stream >> p1; -

291 stream >> p2; -

292 line = QLine(p1, p2); -

293 -

294

return stream;

executed 7 times by 2 tests: return stream;

Executed by:

tst_QMetaType
tst_QVariant

295 } -

296 -

297 #endif // QT_NO_DATASTREAM -

298 -

299 -

300 #ifndef M_2PI -

301 #define M_2PI 6.28318530717958647692528676655900576 -

302 #endif -

303 -

304 /*! -

305 \class QLineF -

306 \inmodule QtCore -

307 \ingroup painting -

308 -

309 \brief The QLineF class provides a two-dimensional vector using -

310 floating point precision. -

311 -

312 A QLineF describes a finite length line (or line segment) on a -

313 two-dimensional surface. QLineF defines the start and end points -

314 of the line using floating point accuracy for coordinates. Use -

315 the toLine() function to retrieve an integer based copy of this -

316 line. -

317 -

318 \table -

319 \row -

320 \li \inlineimage qline-point.png -

321 \li \inlineimage qline-coordinates.png -

322 \endtable -

323 -

324 The positions of the line's start and end points can be retrieved -

325 using the p1(), x1(), y1(), p2(), x2(), and y2() functions. The -

326 dx() and dy() functions return the horizontal and vertical -

327 components of the line, respectively. -

328 -

329 The line's length can be retrieved using the length() function, -

330 and altered using the setLength() function. Similarly, angle() -

331 and setAngle() are respectively used for retrieving and altering -

332 the angle of the line. Use the isNull() -

333 function to determine whether the QLineF represents a valid line -

334 or a null line. -

335 -

336 The intersect() function determines the IntersectType for this -

337 line and a given line, while the angleTo() function returns the -

338 angle between the lines. In addition, the unitVector() function -

339 returns a line that has the same starting point as this line, but -

340 with a length of only 1, while the normalVector() function returns -

341 a line that is perpendicular to this line with the same starting -

342 point and length. -

343 -

344 Finally, the line can be translated a given offset using the -

345 translate() function, and can be traversed using the pointAt() -

346 function. -

347 -

348 \sa QLine, QPolygonF, QRectF -

349 */ -

350 -

351 /*! -

352 \enum QLineF::IntersectType -

353 -

354 Describes the intersection between two lines. -

355 -

356 \table -

357 \row -

358 \li \inlineimage qlinef-unbounded.png -

359 \li \inlineimage qlinef-bounded.png -

360 \row -

361 \li QLineF::UnboundedIntersection -

362 \li QLineF::BoundedIntersection -

363 \endtable -

364 -

365 \value NoIntersection Indicates that the lines do not intersect; -

366 i.e. they are parallel. -

367 -

368 \value UnboundedIntersection The two lines intersect, but not -

369 within the range defined by their lengths. This will be the case -

370 if the lines are not parallel. -

371 -

372 intersect() will also return this value if the intersect point is -

373 within the start and end point of only one of the lines. -

374 -

375 \value BoundedIntersection The two lines intersect with each other -

376 within the start and end points of each line. -

377 -

378 \sa intersect() -

379 */ -

380 -

381 /*! -

382 \fn QLineF::QLineF() -

383 -

384 Constructs a null line. -

385 */ -

386 -

387 /*! -

388 \fn QLineF::QLineF(const QPointF &p1, const QPointF &p2) -

389 -

390 Constructs a line object that represents the line between \a p1 and -

391 \a p2. -

392 */ -

393 -

394 /*! -

395 \fn QLineF::QLineF(qreal x1, qreal y1, qreal x2, qreal y2) -

396 -

397 Constructs a line object that represents the line between (\a x1, \a y1) and -

398 (\a x2, \a y2). -

399 */ -

400 -

401 /*! -

402 \fn QLineF::QLineF(const QLine &line) -

403 -

404 Construct a QLineF object from the given integer-based \a line. -

405 -

406 \sa toLine() -

407 */ -

408 -

409 /*! -

410 \fn bool QLineF::isNull() const -

411 -

412 Returns \c true if the line is not set up with valid start and end point; -

413 otherwise returns \c false. -

414 */ -

415 -

416 /*! -

417 \fn QPointF QLineF::p1() const -

418 -

419 Returns the line's start point. -

420 -

421 \sa x1(), y1(), p2() -

422 */ -

423 -

424 /*! -

425 \fn QPointF QLineF::p2() const -

426 -

427 Returns the line's end point. -

428 -

429 \sa x2(), y2(), p1() -

430 */ -

431 -

432 /*! -

433 \fn QLine QLineF::toLine() const -

434 -

435 Returns an integer based copy of this line. -

436 -

437 Note that the returned line's start and end points are rounded to -

438 the nearest integer. -

439 -

440 \sa QLineF() -

441 */ -

442 /*! -

443 \fn qreal QLineF::x1() const -

444 -

445 Returns the x-coordinate of the line's start point. -

446 -

447 \sa p1() -

448 */ -

449 -

450 /*! -

451 \fn qreal QLineF::y1() const -

452 -

453 Returns the y-coordinate of the line's start point. -

454 -

455 \sa p1() -

456 */ -

457 -

458 /*! -

459 \fn qreal QLineF::x2() const -

460 -

461 Returns the x-coordinate of the line's end point. -

462 -

463 \sa p2() -

464 */ -

465 -

466 /*! -

467 \fn qreal QLineF::y2() const -

468 -

469 Returns the y-coordinate of the line's end point. -

470 -

471 \sa p2() -

472 */ -

473 -

474 /*! -

475 \fn qreal QLineF::dx() const -

476 -

477 Returns the horizontal component of the line's vector. -

478 -

479 \sa dy(), pointAt() -

480 */ -

481 -

482 /*! -

483 \fn qreal QLineF::dy() const -

484 -

485 Returns the vertical component of the line's vector. -

486 -

487 \sa dx(), pointAt() -

488 */ -

489 -

490 /*! -

491 \fn QLineF::setLength(qreal length) -

492 -

493 Sets the length of the line to the given \a length. QLineF will -

494 move the end point - p2() - of the line to give the line its new length. -

495 -

496 If the line is a null line, the length will remain zero regardless -

497 of the length specified. -

498 -

499 \sa length(), isNull() -

500 */ -

501 -

502 /*! -

503 \fn QLineF QLineF::normalVector() const -

504 -

505 Returns a line that is perpendicular to this line with the same starting -

506 point and length. -

507 -

508 \image qlinef-normalvector.png -

509 -

510 \sa unitVector() -

511 */ -

512 -

513 /*! -

514 \fn bool QLineF::operator!=(const QLineF &line) const -

515 -

516 Returns \c true if the given \a line is not the same as \e this line. -

517 -

518 A line is different from another line if their start or end points -

519 differ, or the internal order of the points is different. -

520 */ -

521 -

522 /*! -

523 \fn bool QLineF::operator==(const QLineF &line) const -

524 -

525 Returns \c true if the given \a line is the same as this line. -

526 -

527 A line is identical to another line if the start and end points -

528 are identical, and the internal order of the points is the same. -

529 */ -

530 -

531 /*! -

532 \fn qreal QLineF::pointAt(qreal t) const -

533 -

534 Returns the point at the parameterized position specified by \a -

535 t. The function returns the line's start point if t = 0, and its end -

536 point if t = 1. -

537 -

538 \sa dx(), dy() -

539 */ -

540 -

541 /*! -

542 Returns the length of the line. -

543 -

544 \sa setLength() -

545 */ -

546 qreal QLineF::length() const -

547 { -

548 qreal x = pt2.x() - pt1.x(); -

549 qreal y = pt2.y() - pt1.y(); -

550

return qSqrt(x*x + y*y);

executed 133013 times by 21 tests: return qSqrt(x*x + y*y);

Executed by:

tst_QAccessibility
tst_QBrush
tst_QCheckBox
tst_QDataStream
tst_QGestureRecognizer
tst_QGraphicsEffectSource
tst_QGraphicsItem
tst_QGraphicsProxyWidget
tst_QGraphicsScene
tst_QGraphicsSceneIndex
tst_QGraphicsView
tst_QGraphicsWidget
tst_QLine
tst_QMdiSubWindow
tst_QPainter
tst_QPainterPath
tst_QPrinter
tst_QProgressBar
tst_QStyle
tst_QTreeView
tst_QTreeWidget

133013

551 } -

552 -

553 /*! -

554 \since 4.4 -

555 -

556 Returns the angle of the line in degrees. -

557 -

558 The return value will be in the range of values from 0.0 up to but not -

559 including 360.0. The angles are measured counter-clockwise from a point -

560 on the x-axis to the right of the origin (x > 0). -

561 -

562 \sa setAngle() -

563 */ -

564 qreal QLineF::angle() const -

565 { -

566 const qreal dx = pt2.x() - pt1.x(); -

567 const qreal dy = pt2.y() - pt1.y(); -

568 -

569 const qreal theta = qAtan2(-dy, dx) * 360.0 / M_2PI; -

570 -

571

const qreal theta_normalized = theta < 0 ? theta + 360 : theta;

theta < 0	Description
TRUE	evaluated 53857 times by 15 tests Evaluated by: tst_QCheckBox tst_QGestureRecognizer tst_QGraphicsEffectSource tst_QGraphicsItem tst_QGraphicsProxyWidget tst_QGraphicsScene tst_QGraphicsSceneIndex tst_QGraphicsView tst_QGraphicsWidget tst_QLine tst_QMdiSubWindow tst_QPainter tst_QPainterPath tst_QTreeView tst_QTreeWidget
FALSE	evaluated 54304 times by 10 tests Evaluated by: tst_QGestureRecognizer tst_QGraphicsEffectSource tst_QGraphicsItem tst_QGraphicsScene tst_QGraphicsSceneIndex tst_QGraphicsView tst_QGraphicsWidget tst_QLine tst_QPainter tst_QPainterPath

53857-54304

572 -

573

if (qFuzzyCompare(theta_normalized, qreal(360)))

qFuzzyCompare(...d, qreal(360))	Description
TRUE	evaluated 2 times by 1 test Evaluated by: tst_QLine
FALSE	evaluated 108159 times by 15 tests Evaluated by: tst_QCheckBox tst_QGestureRecognizer tst_QGraphicsEffectSource tst_QGraphicsItem tst_QGraphicsProxyWidget tst_QGraphicsScene tst_QGraphicsSceneIndex tst_QGraphicsView tst_QGraphicsWidget tst_QLine tst_QMdiSubWindow tst_QPainter tst_QPainterPath tst_QTreeView tst_QTreeWidget

2-108159

574

return qreal(0);

executed 2 times by 1 test: return qreal(0);

Executed by:

tst_QLine

575 else -

576

return theta_normalized;

executed 108159 times by 15 tests: return theta_normalized;

Executed by:

tst_QCheckBox
tst_QGestureRecognizer
tst_QGraphicsEffectSource
tst_QGraphicsItem
tst_QGraphicsProxyWidget
tst_QGraphicsScene
tst_QGraphicsSceneIndex
tst_QGraphicsView
tst_QGraphicsWidget
tst_QLine
tst_QMdiSubWindow
tst_QPainter
tst_QPainterPath
tst_QTreeView
tst_QTreeWidget

108159

577 } -

578 -

579 /*! -

580 \since 4.4 -

581 -

582 Sets the angle of the line to the given \a angle (in degrees). -

583 This will change the position of the second point of the line such that -

584 the line has the given angle. -

585 -

586 Positive values for the angles mean counter-clockwise while negative values -

587 mean the clockwise direction. Zero degrees is at the 3 o'clock position. -

588 -

589 \sa angle() -

590 */ -

591 void QLineF::setAngle(qreal angle) -

592 { -

593 const qreal angleR = angle * M_2PI / 360.0; -

594 const qreal l = length(); -

595 -

596 const qreal dx = qCos(angleR) * l; -

597 const qreal dy = -qSin(angleR) * l; -

598 -

599 pt2.rx() = pt1.x() + dx; -

600 pt2.ry() = pt1.y() + dy; -

601

}

executed 1804 times by 1 test: end of block

Executed by:

tst_QLine

1804

602 -

603 /*! -

604 \since 4.4 -

605 -

606 Returns a QLineF with the given \a length and \a angle. -

607 -

608 The first point of the line will be on the origin. -

609 -

610 Positive values for the angles mean counter-clockwise while negative values -

611 mean the clockwise direction. Zero degrees is at the 3 o'clock position. -

612 */ -

613 QLineF QLineF::fromPolar(qreal length, qreal angle) -

614 { -

615 const qreal angleR = angle * M_2PI / 360.0; -

616

return QLineF(0, 0, qCos(angleR) * length, -qSin(angleR) * length);

executed 4169 times by 2 tests: return QLineF(0, 0, qCos(angleR) * length, -qSin(angleR) * length);

Executed by:

tst_QLine
tst_QPainterPath

4169

617 } -

618 -

619 /*! -

620 Returns the unit vector for this line, i.e a line starting at the -

621 same point as \e this line with a length of 1.0. -

622 -

623 \sa normalVector() -

624 */ -

625 QLineF QLineF::unitVector() const -

626 { -

627 qreal x = pt2.x() - pt1.x(); -

628 qreal y = pt2.y() - pt1.y(); -

629 -

630 qreal len = qSqrt(x*x + y*y); -

631 QLineF f(p1(), QPointF(pt1.x() + x/len, pt1.y() + y/len)); -

632 -

633 #ifndef QT_NO_DEBUG -

634

if (qAbs(f.length() - 1) >= 0.001)

qAbs(f.length() - 1) >= 0.001	Description
TRUE	never evaluated
FALSE	evaluated 102525 times by 15 tests Evaluated by: tst_QAccessibility tst_QCheckBox tst_QGraphicsEffectSource tst_QGraphicsItem tst_QGraphicsProxyWidget tst_QGraphicsScene tst_QGraphicsSceneIndex tst_QGraphicsView tst_QGraphicsWidget tst_QLine tst_QMdiSubWindow tst_QPainter tst_QPainterPath tst_QTreeView tst_QTreeWidget

0-102525

635

qWarning("QLine::unitVector: New line does not have unit length");

never executed: QMessageLogger(__FILE__, 635, __PRETTY_FUNCTION__).warning("QLine::unitVector: New line does not have unit length");

636 #endif -

637 -

638

return f;

executed 102525 times by 15 tests: return f;

Executed by:

tst_QAccessibility
tst_QCheckBox
tst_QGraphicsEffectSource
tst_QGraphicsItem
tst_QGraphicsProxyWidget
tst_QGraphicsScene
tst_QGraphicsSceneIndex
tst_QGraphicsView
tst_QGraphicsWidget
tst_QLine
tst_QMdiSubWindow
tst_QPainter
tst_QPainterPath
tst_QTreeView
tst_QTreeWidget

102525

639 } -

640 -

641 /*! -

642 \fn QLineF::IntersectType QLineF::intersect(const QLineF &line, QPointF *intersectionPoint) const -

643 -

644 Returns a value indicating whether or not \e this line intersects -

645 with the given \a line. -

646 -

647 The actual intersection point is extracted to \a intersectionPoint -

648 (if the pointer is valid). If the lines are parallel, the -

649 intersection point is undefined. -

650 */ -

651 -

652 QLineF::IntersectType QLineF::intersect(const QLineF &l, QPointF *intersectionPoint) const -

653 { -

654 // ipmlementation is based on Graphics Gems III's "Faster Line Segment Intersection" -

655 const QPointF a = pt2 - pt1; -

656 const QPointF b = l.pt1 - l.pt2; -

657 const QPointF c = pt1 - l.pt1; -

658 -

659 const qreal denominator = a.y() * b.x() - a.x() * b.y(); -

660

if (denominator == 0 || !qt_is_finite(denominator))

denominator == 0	Description
TRUE	evaluated 3612 times by 8 tests Evaluated by: tst_QCheckBox tst_QGraphicsItem tst_QGraphicsScene tst_QGraphicsView tst_QLine tst_QPainter tst_QPainterPath tst_QTreeView
FALSE	evaluated 53458 times by 14 tests Evaluated by: tst_QCheckBox tst_QGraphicsEffectSource tst_QGraphicsItem tst_QGraphicsProxyWidget tst_QGraphicsScene tst_QGraphicsSceneIndex tst_QGraphicsView tst_QGraphicsWidget tst_QLine tst_QMdiSubWindow tst_QPainter tst_QPainterPath tst_QTreeView tst_QTreeWidget

!qt_is_finite(denominator)	Description
TRUE	never evaluated
FALSE	evaluated 53458 times by 14 tests Evaluated by: tst_QCheckBox tst_QGraphicsEffectSource tst_QGraphicsItem tst_QGraphicsProxyWidget tst_QGraphicsScene tst_QGraphicsSceneIndex tst_QGraphicsView tst_QGraphicsWidget tst_QLine tst_QMdiSubWindow tst_QPainter tst_QPainterPath tst_QTreeView tst_QTreeWidget

0-53458

661

return NoIntersection;

executed 3612 times by 8 tests: return NoIntersection;

Executed by:

tst_QCheckBox
tst_QGraphicsItem
tst_QGraphicsScene
tst_QGraphicsView
tst_QLine
tst_QPainter
tst_QPainterPath
tst_QTreeView

3612

662 -

663 const qreal reciprocal = 1 / denominator; -

664 const qreal na = (b.y() * c.x() - b.x() * c.y()) * reciprocal; -

665

if (intersectionPoint)

intersectionPoint	Description
TRUE	evaluated 53458 times by 14 tests Evaluated by: tst_QCheckBox tst_QGraphicsEffectSource tst_QGraphicsItem tst_QGraphicsProxyWidget tst_QGraphicsScene tst_QGraphicsSceneIndex tst_QGraphicsView tst_QGraphicsWidget tst_QLine tst_QMdiSubWindow tst_QPainter tst_QPainterPath tst_QTreeView tst_QTreeWidget
FALSE	never evaluated

0-53458

666

*intersectionPoint = pt1 + a * na;

executed 53458 times by 14 tests: *intersectionPoint = pt1 + a * na;

Executed by:

tst_QCheckBox
tst_QGraphicsEffectSource
tst_QGraphicsItem
tst_QGraphicsProxyWidget
tst_QGraphicsScene
tst_QGraphicsSceneIndex
tst_QGraphicsView
tst_QGraphicsWidget
tst_QLine
tst_QMdiSubWindow
tst_QPainter
tst_QPainterPath
tst_QTreeView
tst_QTreeWidget

53458

667 -

668

if (na < 0 || na > 1)

na < 0	Description
TRUE	evaluated 35 times by 5 tests Evaluated by: tst_QGraphicsItem tst_QGraphicsProxyWidget tst_QMdiSubWindow tst_QPainter tst_QTreeWidget
FALSE	evaluated 53423 times by 14 tests Evaluated by: tst_QCheckBox tst_QGraphicsEffectSource tst_QGraphicsItem tst_QGraphicsProxyWidget tst_QGraphicsScene tst_QGraphicsSceneIndex tst_QGraphicsView tst_QGraphicsWidget tst_QLine tst_QMdiSubWindow tst_QPainter tst_QPainterPath tst_QTreeView tst_QTreeWidget

na > 1	Description
TRUE	evaluated 26225 times by 13 tests Evaluated by: tst_QCheckBox tst_QGraphicsEffectSource tst_QGraphicsItem tst_QGraphicsProxyWidget tst_QGraphicsScene tst_QGraphicsSceneIndex tst_QGraphicsView tst_QGraphicsWidget tst_QMdiSubWindow tst_QPainter tst_QPainterPath tst_QTreeView tst_QTreeWidget
FALSE	evaluated 27198 times by 14 tests Evaluated by: tst_QCheckBox tst_QGraphicsEffectSource tst_QGraphicsItem tst_QGraphicsProxyWidget tst_QGraphicsScene tst_QGraphicsSceneIndex tst_QGraphicsView tst_QGraphicsWidget tst_QLine tst_QMdiSubWindow tst_QPainter tst_QPainterPath tst_QTreeView tst_QTreeWidget

35-53423

669

return UnboundedIntersection;

executed 26260 times by 13 tests: return UnboundedIntersection;

Executed by:

tst_QCheckBox
tst_QGraphicsEffectSource
tst_QGraphicsItem
tst_QGraphicsProxyWidget
tst_QGraphicsScene
tst_QGraphicsSceneIndex
tst_QGraphicsView
tst_QGraphicsWidget
tst_QMdiSubWindow
tst_QPainter
tst_QPainterPath
tst_QTreeView
tst_QTreeWidget

26260

670 -

671 const qreal nb = (a.x() * c.y() - a.y() * c.x()) * reciprocal; -

672

if (nb < 0 || nb > 1)

nb < 0	Description
TRUE	never evaluated
FALSE	evaluated 27198 times by 14 tests Evaluated by: tst_QCheckBox tst_QGraphicsEffectSource tst_QGraphicsItem tst_QGraphicsProxyWidget tst_QGraphicsScene tst_QGraphicsSceneIndex tst_QGraphicsView tst_QGraphicsWidget tst_QLine tst_QMdiSubWindow tst_QPainter tst_QPainterPath tst_QTreeView tst_QTreeWidget

nb > 1	Description
TRUE	evaluated 1 time by 1 test Evaluated by: tst_QLine
FALSE	evaluated 27197 times by 14 tests Evaluated by: tst_QCheckBox tst_QGraphicsEffectSource tst_QGraphicsItem tst_QGraphicsProxyWidget tst_QGraphicsScene tst_QGraphicsSceneIndex tst_QGraphicsView tst_QGraphicsWidget tst_QLine tst_QMdiSubWindow tst_QPainter tst_QPainterPath tst_QTreeView tst_QTreeWidget

0-27198

673

return UnboundedIntersection;

executed 1 time by 1 test: return UnboundedIntersection;

Executed by:

tst_QLine

674 -

675

return BoundedIntersection;

executed 27197 times by 14 tests: return BoundedIntersection;

Executed by:

tst_QCheckBox
tst_QGraphicsEffectSource
tst_QGraphicsItem
tst_QGraphicsProxyWidget
tst_QGraphicsScene
tst_QGraphicsSceneIndex
tst_QGraphicsView
tst_QGraphicsWidget
tst_QLine
tst_QMdiSubWindow
tst_QPainter
tst_QPainterPath
tst_QTreeView
tst_QTreeWidget

27197

676 } -

677 -

678 /*! -

679 \fn void QLineF::translate(const QPointF &offset) -

680 -

681 Translates this line by the given \a offset. -

682 */ -

683 -

684 /*! -

685 \fn void QLineF::translate(qreal dx, qreal dy) -

686 \overload -

687 -

688 Translates this line the distance specified by \a dx and \a dy. -

689 */ -

690 -

691 /*! -

692 \fn QLineF QLineF::translated(const QPointF &offset) const -

693 -

694 \since 4.4 -

695 -

696 Returns this line translated by the given \a offset. -

697 */ -

698 -

699 /*! -

700 \fn QLineF QLineF::translated(qreal dx, qreal dy) const -

701 \overload -

702 \since 4.4 -

703 -

704 Returns this line translated the distance specified by \a dx and \a dy. -

705 */ -

706 -

707 /*! -

708 \fn void QLineF::setP1(const QPointF &p1) -

709 \since 4.4 -

710 -

711 Sets the starting point of this line to \a p1. -

712 -

713 \sa setP2(), p1() -

714 */ -

715 -

716 -

717 /*! -

718 \fn void QLineF::setP2(const QPointF &p2) -

719 \since 4.4 -

720 -

721 Sets the end point of this line to \a p2. -

722 -

723 \sa setP1(), p2() -

724 */ -

725 -

726 -

727 /*! -

728 \fn void QLineF::setPoints(const QPointF &p1, const QPointF &p2) -

729 \since 4.4 -

730 -

731 Sets the start point of this line to \a p1 and the end point of this line to \a p2. -

732 -

733 \sa setP1(), setP2(), p1(), p2() -

734 */ -

735 -

736 -

737 /*! -

738 \fn void QLineF::setLine(qreal x1, qreal y1, qreal x2, qreal y2) -

739 \since 4.4 -

740 -

741 Sets this line to the start in \a x1, \a y1 and end in \a x2, \a y2. -

742 -

743 \sa setP1(), setP2(), p1(), p2() -

744 */ -

745 -

746 /*! -

747 \fn qreal QLineF::angleTo(const QLineF &line) const -

748 -

749 \since 4.4 -

750 -

751 Returns the angle (in degrees) from this line to the given \a -

752 line, taking the direction of the lines into account. If the lines -

753 do not intersect within their range, it is the intersection point of -

754 the extended lines that serves as origin (see -

755 QLineF::UnboundedIntersection). -

756 -

757 The returned value represents the number of degrees you need to add -

758 to this line to make it have the same angle as the given \a line, -

759 going counter-clockwise. -

760 -

761 \sa intersect() -

762 */ -

763 qreal QLineF::angleTo(const QLineF &l) const -

764 { -

765

if (isNull() || l.isNull())

isNull()	Description
TRUE	never evaluated
FALSE	evaluated 52779 times by 14 tests Evaluated by: tst_QCheckBox tst_QGraphicsEffectSource tst_QGraphicsItem tst_QGraphicsProxyWidget tst_QGraphicsScene tst_QGraphicsSceneIndex tst_QGraphicsView tst_QGraphicsWidget tst_QLine tst_QMdiSubWindow tst_QPainter tst_QPainterPath tst_QTreeView tst_QTreeWidget

l.isNull()	Description
TRUE	never evaluated
FALSE	evaluated 52779 times by 14 tests Evaluated by: tst_QCheckBox tst_QGraphicsEffectSource tst_QGraphicsItem tst_QGraphicsProxyWidget tst_QGraphicsScene tst_QGraphicsSceneIndex tst_QGraphicsView tst_QGraphicsWidget tst_QLine tst_QMdiSubWindow tst_QPainter tst_QPainterPath tst_QTreeView tst_QTreeWidget

0-52779

766

return 0;

never executed: return 0;

767 -

768 const qreal a1 = angle(); -

769 const qreal a2 = l.angle(); -

770 -

771 const qreal delta = a2 - a1; -

772

const qreal delta_normalized = delta < 0 ? delta + 360 : delta;

delta < 0	Description
TRUE	evaluated 19556 times by 9 tests Evaluated by: tst_QGraphicsEffectSource tst_QGraphicsItem tst_QGraphicsScene tst_QGraphicsSceneIndex tst_QGraphicsView tst_QGraphicsWidget tst_QLine tst_QPainter tst_QPainterPath
FALSE	evaluated 33223 times by 14 tests Evaluated by: tst_QCheckBox tst_QGraphicsEffectSource tst_QGraphicsItem tst_QGraphicsProxyWidget tst_QGraphicsScene tst_QGraphicsSceneIndex tst_QGraphicsView tst_QGraphicsWidget tst_QLine tst_QMdiSubWindow tst_QPainter tst_QPainterPath tst_QTreeView tst_QTreeWidget

19556-33223

773 -

774

if (qFuzzyCompare(delta, qreal(360)))

qFuzzyCompare(...a, qreal(360))	Description
TRUE	never evaluated
FALSE	evaluated 52779 times by 14 tests Evaluated by: tst_QCheckBox tst_QGraphicsEffectSource tst_QGraphicsItem tst_QGraphicsProxyWidget tst_QGraphicsScene tst_QGraphicsSceneIndex tst_QGraphicsView tst_QGraphicsWidget tst_QLine tst_QMdiSubWindow tst_QPainter tst_QPainterPath tst_QTreeView tst_QTreeWidget

0-52779

775

return 0;

never executed: return 0;

776 else -

777

return delta_normalized;

executed 52779 times by 14 tests: return delta_normalized;

Executed by:

tst_QCheckBox
tst_QGraphicsEffectSource
tst_QGraphicsItem
tst_QGraphicsProxyWidget
tst_QGraphicsScene
tst_QGraphicsSceneIndex
tst_QGraphicsView
tst_QGraphicsWidget
tst_QLine
tst_QMdiSubWindow
tst_QPainter
tst_QPainterPath
tst_QTreeView
tst_QTreeWidget

52779

778 } -

779 -

780 /*! -

781 \fn qreal QLineF::angle(const QLineF &line) const -

782 -

783 \obsolete -

784 -

785 Returns the angle (in degrees) between this line and the given \a -

786 line, taking the direction of the lines into account. If the lines -

787 do not intersect within their range, it is the intersection point of -

788 the extended lines that serves as origin (see -

789 QLineF::UnboundedIntersection). -

790 -

791 \table -

792 \row -

793 \li \inlineimage qlinef-angle-identicaldirection.png -

794 \li \inlineimage qlinef-angle-oppositedirection.png -

795 \endtable -

796 -

797 When the lines are parallel, this function returns 0 if they have -

798 the same direction; otherwise it returns 180. -

799 -

800 \sa intersect() -

801 */ -

802 qreal QLineF::angle(const QLineF &l) const -

803 { -

804

if (isNull() || l.isNull())

isNull()	Description
TRUE	never evaluated
FALSE	evaluated 183 times by 1 test Evaluated by: tst_QLine

l.isNull()	Description
TRUE	never evaluated
FALSE	evaluated 183 times by 1 test Evaluated by: tst_QLine

0-183

805

return 0;

never executed: return 0;

806 qreal cos_line = (dx()*l.dx() + dy()*l.dy()) / (length()*l.length()); -

807 qreal rad = 0; -

808 // only accept cos_line in the range [-1,1], if it is outside, use 0 (we return 0 rather than PI for those cases) -

809

if (cos_line >= -1.0 && cos_line <= 1.0) rad = qAcos( cos_line );

executed 182 times by 1 test: rad = qAcos( cos_line );

Executed by:

tst_QLine

cos_line >= -1.0	Description
TRUE	evaluated 183 times by 1 test Evaluated by: tst_QLine
FALSE	never evaluated

cos_line <= 1.0	Description
TRUE	evaluated 182 times by 1 test Evaluated by: tst_QLine
FALSE	evaluated 1 time by 1 test Evaluated by: tst_QLine

0-183

810

return rad * 360 / M_2PI;

executed 183 times by 1 test: return rad * 360 / 6.28318530717958647692528676655900576;

Executed by:

tst_QLine

183

811 } -

812 -

813 -

814 #ifndef QT_NO_DEBUG_STREAM -

815 QDebug operator<<(QDebug dbg, const QLineF &p) -

816 { -

817 QDebugStateSaver saver(dbg); -

818 dbg.nospace() << "QLineF(" << p.p1() << ',' << p.p2() << ')'; -

819

return dbg;

executed 2 times by 2 tests: return dbg;

Executed by:

tst_QDebug
tst_QVariant

820 } -

821 #endif -

822 -

823 #ifndef QT_NO_DATASTREAM -

824 /*! -

825 \relates QLineF -

826 -

827 Writes the given \a line to the given \a stream and returns a -

828 reference to the stream. -

829 -

830 \sa {Serializing Qt Data Types} -

831 */ -

832 -

833 QDataStream &operator<<(QDataStream &stream, const QLineF &line) -

834 { -

835 stream << line.p1() << line.p2(); -

836

return stream;

executed 3 times by 2 tests: return stream;

Executed by:

tst_QMetaType
tst_QVariant

837 } -

838 -

839 /*! -

840 \relates QLineF -

841 -

842 Reads a line from the given \a stream into the given \a line and -

843 returns a reference to the stream. -

844 -

845 \sa {Serializing Qt Data Types} -

846 */ -

847 -

848 QDataStream &operator>>(QDataStream &stream, QLineF &line) -

849 { -

850 QPointF start, end; -

851 stream >> start; -

852 stream >> end; -

853 line = QLineF(start, end); -

854 -

855

return stream;

executed 7 times by 2 tests: return stream;

Executed by:

tst_QMetaType
tst_QVariant

856 } -

857 -

858 #endif // QT_NO_DATASTREAM -

859 -

860 QT_END_NAMESPACE -

Source code

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