qline.cpp

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39 -

40 #include "qline.h" -

41 #include "qdebug.h" -

42 #include "qdatastream.h" -

43 #include "qmath.h" -

44 #include <private/qnumeric_p.h> -

45 -

46 QT_BEGIN_NAMESPACE -

47 -

48 /*! -

49 \class QLine -

50 \inmodule QtCore -

51 \ingroup painting -

52 -

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

54 integer precision. -

55 -

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

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

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

59 QLineF constructor to retrieve a floating point copy. -

60 -

61 \table -

62 \row -

63 \li \inlineimage qline-point.png -

64 \li \inlineimage qline-coordinates.png -

65 \endtable -

66 -

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

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

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

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

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

72 -

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

74 translate() function. -

75 -

76 \sa QLineF, QPolygon, QRect -

77 */ -

78 -

79 /*! -

80 \fn QLine::QLine() -

81 -

82 Constructs a null line. -

83 */ -

84 -

85 /*! -

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

87 -

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

89 \a p2. -

90 */ -

91 -

92 /*! -

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

94 -

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

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

97 */ -

98 -

99 /*! -

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

101 -

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

103 otherwise returns \c false. -

104 */ -

105 -

106 /*! -

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

108 -

109 Returns the line's start point. -

110 -

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

112 */ -

113 -

114 /*! -

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

116 -

117 Returns the line's end point. -

118 -

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

120 */ -

121 -

122 /*! -

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

124 -

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

126 -

127 \sa p1() -

128 */ -

129 -

130 /*! -

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

132 -

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

134 -

135 \sa p1() -

136 */ -

137 -

138 /*! -

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

140 -

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

142 -

143 \sa p2() -

144 */ -

145 -

146 /*! -

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

148 -

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

150 -

151 \sa p2() -

152 */ -

153 -

154 /*! -

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

156 -

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

158 -

159 \sa dy() -

160 */ -

161 -

162 /*! -

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

164 -

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

166 -

167 \sa dx() -

168 */ -

169 -

170 /*! -

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

172 -

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

174 -

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

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

177 */ -

178 -

179 /*! -

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

181 -

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

183 -

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

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

186 */ -

187 -

188 /*! -

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

190 -

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

192 */ -

193 -

194 /*! -

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

196 \overload -

197 -

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

199 */ -

200 -

201 /*! -

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

203 -

204 \since 4.4 -

205 -

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

207 */ -

208 -

209 /*! -

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

211 \overload -

212 \since 4.4 -

213 -

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

215 */ -

216 -

217 -

218 /*! -

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

220 \since 4.4 -

221 -

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

223 -

224 \sa setP2(), p1() -

225 */ -

226 -

227 -

228 /*! -

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

230 \since 4.4 -

231 -

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

233 -

234 \sa setP1(), p2() -

235 */ -

236 -

237 -

238 /*! -

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

240 \since 4.4 -

241 -

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

243 -

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

245 */ -

246 -

247 -

248 /*! -

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

250 \since 4.4 -

251 -

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

253 -

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

255 */ -

256 -

257 -

258 -

259 #ifndef QT_NO_DEBUG_STREAM -

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

261 { -

262 QDebugStateSaver saver(dbg); -

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

264

return dbg;

executed 2 times by 2 tests: return dbg;

Executed by:

tst_QDebug
tst_QVariant

265 } -

266 #endif -

267 -

268 #ifndef QT_NO_DATASTREAM -

269 /*! -

270 \relates QLine -

271 -

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

273 reference to the stream. -

274 -

275 \sa {Serializing Qt Data Types} -

276 */ -

277 -

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

279 { -

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

281

return stream;

executed 3 times by 2 tests: return stream;

Executed by:

tst_QMetaType
tst_QVariant

282 } -

283 -

284 /*! -

285 \relates QLine -

286 -

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

288 returns a reference to the stream. -

289 -

290 \sa {Serializing Qt Data Types} -

291 */ -

292 -

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

294 { -

295 QPoint p1, p2; -

296 stream >> p1; -

297 stream >> p2; -

298 line = QLine(p1, p2); -

299 -

300

return stream;

executed 7 times by 2 tests: return stream;

Executed by:

tst_QMetaType
tst_QVariant

301 } -

302 -

303 #endif // QT_NO_DATASTREAM -

304 -

305 -

306 #ifndef M_2PI -

307 #define M_2PI 6.28318530717958647692528676655900576 -

308 #endif -

309 -

310 /*! -

311 \class QLineF -

312 \inmodule QtCore -

313 \ingroup painting -

314 -

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

316 floating point precision. -

317 -

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

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

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

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

322 line. -

323 -

324 \table -

325 \row -

326 \li \inlineimage qline-point.png -

327 \li \inlineimage qline-coordinates.png -

328 \endtable -

329 -

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

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

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

333 components of the line, respectively. -

334 -

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

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

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

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

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

340 or a null line. -

341 -

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

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

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

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

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

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

348 point and length. -

349 -

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

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

352 function. -

353 -

354 \sa QLine, QPolygonF, QRectF -

355 */ -

356 -

357 /*! -

358 \enum QLineF::IntersectType -

359 -

360 Describes the intersection between two lines. -

361 -

362 \table -

363 \row -

364 \li \inlineimage qlinef-unbounded.png -

365 \li \inlineimage qlinef-bounded.png -

366 \row -

367 \li QLineF::UnboundedIntersection -

368 \li QLineF::BoundedIntersection -

369 \endtable -

370 -

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

372 i.e. they are parallel. -

373 -

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

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

376 if the lines are not parallel. -

377 -

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

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

380 -

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

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

383 -

384 \sa intersect() -

385 */ -

386 -

387 /*! -

388 \fn QLineF::QLineF() -

389 -

390 Constructs a null line. -

391 */ -

392 -

393 /*! -

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

395 -

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

397 \a p2. -

398 */ -

399 -

400 /*! -

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

402 -

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

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

405 */ -

406 -

407 /*! -

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

409 -

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

411 -

412 \sa toLine() -

413 */ -

414 -

415 /*! -

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

417 -

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

419 otherwise returns \c false. -

420 */ -

421 -

422 /*! -

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

424 -

425 Returns the line's start point. -

426 -

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

428 */ -

429 -

430 /*! -

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

432 -

433 Returns the line's end point. -

434 -

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

436 */ -

437 -

438 /*! -

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

440 -

441 Returns an integer based copy of this line. -

442 -

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

444 the nearest integer. -

445 -

446 \sa QLineF() -

447 */ -

448 /*! -

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

450 -

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

452 -

453 \sa p1() -

454 */ -

455 -

456 /*! -

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

458 -

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

460 -

461 \sa p1() -

462 */ -

463 -

464 /*! -

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

466 -

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

468 -

469 \sa p2() -

470 */ -

471 -

472 /*! -

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

474 -

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

476 -

477 \sa p2() -

478 */ -

479 -

480 /*! -

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

482 -

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

484 -

485 \sa dy(), pointAt() -

486 */ -

487 -

488 /*! -

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

490 -

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

492 -

493 \sa dx(), pointAt() -

494 */ -

495 -

496 /*! -

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

498 -

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

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

501 -

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

503 of the length specified. -

504 -

505 \sa length(), isNull() -

506 */ -

507 -

508 /*! -

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

510 -

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

512 point and length. -

513 -

514 \image qlinef-normalvector.png -

515 -

516 \sa unitVector() -

517 */ -

518 -

519 /*! -

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

521 -

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

523 -

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

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

526 */ -

527 -

528 /*! -

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

530 -

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

532 -

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

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

535 */ -

536 -

537 /*! -

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

539 -

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

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

542 point if t = 1. -

543 -

544 \sa dx(), dy() -

545 */ -

546 -

547 /*! -

548 Returns the length of the line. -

549 -

550 \sa setLength() -

551 */ -

552 qreal QLineF::length() const -

553 { -

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

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

556

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

executed 133358 times by 22 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_QTouchEvent
tst_QTreeView
tst_QTreeWidget

133358

557 } -

558 -

559 /*! -

560 \since 4.4 -

561 -

562 Returns the angle of the line in degrees. -

563 -

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

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

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

567 -

568 \sa setAngle() -

569 */ -

570 qreal QLineF::angle() const -

571 { -

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

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

574 -

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

576 -

577

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

theta < 0	Description
TRUE	evaluated 53865 times by 16 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_QTouchEvent tst_QTreeView tst_QTreeWidget
FALSE	evaluated 54312 times by 11 tests Evaluated by: tst_QGestureRecognizer tst_QGraphicsEffectSource tst_QGraphicsItem tst_QGraphicsScene tst_QGraphicsSceneIndex tst_QGraphicsView tst_QGraphicsWidget tst_QLine tst_QPainter tst_QPainterPath tst_QTouchEvent

53865-54312

578 -

579

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

qFuzzyCompare(...d, qreal(360))	Description
TRUE	evaluated 2 times by 1 test Evaluated by: tst_QLine
FALSE	evaluated 108175 times by 16 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_QTouchEvent tst_QTreeView tst_QTreeWidget

2-108175

580

return qreal(0);

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

Executed by:

tst_QLine

581 else -

582

return theta_normalized;

executed 108175 times by 16 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_QTouchEvent
tst_QTreeView
tst_QTreeWidget

108175

583 } -

584 -

585 /*! -

586 \since 4.4 -

587 -

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

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

590 the line has the given angle. -

591 -

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

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

594 -

595 \sa angle() -

596 */ -

597 void QLineF::setAngle(qreal angle) -

598 { -

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

600 const qreal l = length(); -

601 -

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

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

604 -

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

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

607

}

executed 1804 times by 1 test: end of block

Executed by:

tst_QLine

1804

608 -

609 /*! -

610 \since 4.4 -

611 -

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

613 -

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

615 -

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

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

618 */ -

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

620 { -

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

622

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

623 } -

624 -

625 /*! -

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

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

628 -

629 \sa normalVector() -

630 */ -

631 QLineF QLineF::unitVector() const -

632 { -

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

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

635 -

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

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

638 -

639 #ifndef QT_NO_DEBUG -

640

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

qAbs(f.length() - 1) >= 0.001	Description
TRUE	never evaluated
FALSE	evaluated 102875 times by 16 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_QTouchEvent tst_QTreeView tst_QTreeWidget

0-102875

641

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

never executed: QMessageLogger(__FILE__, 641, __PRETTY_FUNCTION__).warning("QLine::unitVector: New line does not have unit length");

642 #endif -

643 -

644

return f;

executed 102875 times by 16 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_QTouchEvent
tst_QTreeView
tst_QTreeWidget

102875

645 } -

646 -

647 /*! -

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

649 -

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

651 with the given \a line. -

652 -

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

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

655 intersection point is undefined. -

656 */ -

657 -

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

659 { -

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

661 const QPointF a = pt2 - pt1; -

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

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

664 -

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

666

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

denominator == 0	Description
TRUE	evaluated 3700 times by 9 tests Evaluated by: tst_QCheckBox tst_QGraphicsItem tst_QGraphicsScene tst_QGraphicsView tst_QLine tst_QPainter tst_QPainterPath tst_QTouchEvent tst_QTreeView
FALSE	evaluated 53468 times by 15 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_QTouchEvent tst_QTreeView tst_QTreeWidget

!qt_is_finite(denominator)	Description
TRUE	never evaluated
FALSE	evaluated 53468 times by 15 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_QTouchEvent tst_QTreeView tst_QTreeWidget

0-53468

667

return NoIntersection;

executed 3700 times by 9 tests: return NoIntersection;

Executed by:

tst_QCheckBox
tst_QGraphicsItem
tst_QGraphicsScene
tst_QGraphicsView
tst_QLine
tst_QPainter
tst_QPainterPath
tst_QTouchEvent
tst_QTreeView

3700

668 -

669 const qreal reciprocal = 1 / denominator; -

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

671

if (intersectionPoint)

intersectionPoint	Description
TRUE	evaluated 53468 times by 15 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_QTouchEvent tst_QTreeView tst_QTreeWidget
FALSE	never evaluated

0-53468

672

*intersectionPoint = pt1 + a * na;

executed 53468 times by 15 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_QTouchEvent
tst_QTreeView
tst_QTreeWidget

53468

673 -

674

if (na < 0 || na > 1)

na < 0	Description
TRUE	evaluated 36 times by 6 tests Evaluated by: tst_QGraphicsItem tst_QGraphicsProxyWidget tst_QMdiSubWindow tst_QPainter tst_QTouchEvent tst_QTreeWidget
FALSE	evaluated 53432 times by 15 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_QTouchEvent tst_QTreeView tst_QTreeWidget

na > 1	Description
TRUE	evaluated 26230 times by 14 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_QTouchEvent tst_QTreeView tst_QTreeWidget
FALSE	evaluated 27202 times by 15 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_QTouchEvent tst_QTreeView tst_QTreeWidget

36-53432

675

return UnboundedIntersection;

executed 26266 times by 14 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_QTouchEvent
tst_QTreeView
tst_QTreeWidget

26266

676 -

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

678

if (nb < 0 || nb > 1)

nb < 0	Description
TRUE	never evaluated
FALSE	evaluated 27202 times by 15 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_QTouchEvent tst_QTreeView tst_QTreeWidget

nb > 1	Description
TRUE	evaluated 1 time by 1 test Evaluated by: tst_QLine
FALSE	evaluated 27201 times by 15 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_QTouchEvent tst_QTreeView tst_QTreeWidget

0-27202

679

return UnboundedIntersection;

executed 1 time by 1 test: return UnboundedIntersection;

Executed by:

tst_QLine

680 -

681

return BoundedIntersection;

executed 27201 times by 15 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_QTouchEvent
tst_QTreeView
tst_QTreeWidget

27201

682 } -

683 -

684 /*! -

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

686 -

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

688 */ -

689 -

690 /*! -

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

692 \overload -

693 -

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

695 */ -

696 -

697 /*! -

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

699 -

700 \since 4.4 -

701 -

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

703 */ -

704 -

705 /*! -

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

707 \overload -

708 \since 4.4 -

709 -

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

711 */ -

712 -

713 /*! -

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

715 \since 4.4 -

716 -

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

718 -

719 \sa setP2(), p1() -

720 */ -

721 -

722 -

723 /*! -

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

725 \since 4.4 -

726 -

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

728 -

729 \sa setP1(), p2() -

730 */ -

731 -

732 -

733 /*! -

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

735 \since 4.4 -

736 -

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

738 -

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

740 */ -

741 -

742 -

743 /*! -

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

745 \since 4.4 -

746 -

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

748 -

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

750 */ -

751 -

752 /*! -

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

754 -

755 \since 4.4 -

756 -

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

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

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

760 the extended lines that serves as origin (see -

761 QLineF::UnboundedIntersection). -

762 -

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

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

765 going counter-clockwise. -

766 -

767 \sa intersect() -

768 */ -

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

770 { -

771

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

isNull()	Description
TRUE	never evaluated
FALSE	evaluated 52787 times by 15 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_QTouchEvent tst_QTreeView tst_QTreeWidget

l.isNull()	Description
TRUE	never evaluated
FALSE	evaluated 52787 times by 15 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_QTouchEvent tst_QTreeView tst_QTreeWidget

0-52787

772

return 0;

never executed: return 0;

773 -

774 const qreal a1 = angle(); -

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

776 -

777 const qreal delta = a2 - a1; -

778

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

delta < 0	Description
TRUE	evaluated 19559 times by 10 tests Evaluated by: tst_QGraphicsEffectSource tst_QGraphicsItem tst_QGraphicsScene tst_QGraphicsSceneIndex tst_QGraphicsView tst_QGraphicsWidget tst_QLine tst_QPainter tst_QPainterPath tst_QTouchEvent
FALSE	evaluated 33228 times by 15 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_QTouchEvent tst_QTreeView tst_QTreeWidget

19559-33228

779 -

780

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

qFuzzyCompare(...a, qreal(360))	Description
TRUE	never evaluated
FALSE	evaluated 52787 times by 15 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_QTouchEvent tst_QTreeView tst_QTreeWidget

0-52787

781

return 0;

never executed: return 0;

782 else -

783

return delta_normalized;

executed 52787 times by 15 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_QTouchEvent
tst_QTreeView
tst_QTreeWidget

52787

784 } -

785 -

786 /*! -

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

788 -

789 \obsolete -

790 -

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

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

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

794 the extended lines that serves as origin (see -

795 QLineF::UnboundedIntersection). -

796 -

797 \table -

798 \row -

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

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

801 \endtable -

802 -

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

804 the same direction; otherwise it returns 180. -

805 -

806 \sa intersect() -

807 */ -

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

809 { -

810

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

811

return 0;

never executed: return 0;

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

813 qreal rad = 0; -

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

815

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

816

return rad * 360 / M_2PI;

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

Executed by:

tst_QLine

183

817 } -

818 -

819 -

820 #ifndef QT_NO_DEBUG_STREAM -

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

822 { -

823 QDebugStateSaver saver(dbg); -

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

825

return dbg;

executed 2 times by 2 tests: return dbg;

Executed by:

tst_QDebug
tst_QVariant

826 } -

827 #endif -

828 -

829 #ifndef QT_NO_DATASTREAM -

830 /*! -

831 \relates QLineF -

832 -

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

834 reference to the stream. -

835 -

836 \sa {Serializing Qt Data Types} -

837 */ -

838 -

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

840 { -

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

842

return stream;

executed 3 times by 2 tests: return stream;

Executed by:

tst_QMetaType
tst_QVariant

843 } -

844 -

845 /*! -

846 \relates QLineF -

847 -

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

849 returns a reference to the stream. -

850 -

851 \sa {Serializing Qt Data Types} -

852 */ -

853 -

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

855 { -

856 QPointF start, end; -

857 stream >> start; -

858 stream >> end; -

859 line = QLineF(start, end); -

860 -

861

return stream;

executed 7 times by 2 tests: return stream;

Executed by:

tst_QMetaType
tst_QVariant

862 } -

863 -

864 #endif // QT_NO_DATASTREAM -

865 -

866 QT_END_NAMESPACE -

Source code

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