qlcdnumber.cpp

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39 -

40 #include "qlcdnumber.h" -

41 #ifndef QT_NO_LCDNUMBER -

42 #include "qbitarray.h" -

43 #include "qpainter.h" -

44 #include "private/qframe_p.h" -

45 -

46 QT_BEGIN_NAMESPACE -

47 -

48 class QLCDNumberPrivate : public QFramePrivate -

49 { -

50 Q_DECLARE_PUBLIC(QLCDNumber) -

51 public: -

52 void init(); -

53 void internalSetString(const QString& s); -

54 void drawString(const QString& s, QPainter &, QBitArray * = 0, bool = true); -

55 //void drawString(const QString &, QPainter &, QBitArray * = 0) const; -

56 void drawDigit(const QPoint &, QPainter &, int, char, char = ' '); -

57 void drawSegment(const QPoint &, char, QPainter &, int, bool = false); -

58 -

59 int ndigits; -

60 double val; -

61 uint base : 2; -

62 uint smallPoint : 1; -

63 uint fill : 1; -

64 uint shadow : 1; -

65 QString digitStr; -

66 QBitArray points; -

67 }; -

68 -

69 /*! -

70 \class QLCDNumber -

71 -

72 \brief The QLCDNumber widget displays a number with LCD-like digits. -

73 -

74 \ingroup basicwidgets -

75 \inmodule QtWidgets -

76 -

77 It can display a number in just about any size. It can display -

78 decimal, hexadecimal, octal or binary numbers. It is easy to -

79 connect to data sources using the display() slot, which is -

80 overloaded to take any of five argument types. -

81 -

82 There are also slots to change the base with setMode() and the -

83 decimal point with setSmallDecimalPoint(). -

84 -

85 QLCDNumber emits the overflow() signal when it is asked to display -

86 something beyond its range. The range is set by setDigitCount(), -

87 but setSmallDecimalPoint() also influences it. If the display is -

88 set to hexadecimal, octal or binary, the integer equivalent of the -

89 value is displayed. -

90 -

91 These digits and other symbols can be shown: 0/O, 1, 2, 3, 4, 5/S, -

92 6, 7, 8, 9/g, minus, decimal point, A, B, C, D, E, F, h, H, L, o, -

93 P, r, u, U, Y, colon, degree sign (which is specified as single -

94 quote in the string) and space. QLCDNumber substitutes spaces for -

95 illegal characters. -

96 -

97 It is not possible to retrieve the contents of a QLCDNumber -

98 object, although you can retrieve the numeric value with value(). -

99 If you really need the text, we recommend that you connect the -

100 signals that feed the display() slot to another slot as well and -

101 store the value there. -

102 -

103 Incidentally, QLCDNumber is the very oldest part of Qt, tracing -

104 its roots back to a BASIC program on the \l{Sinclair Spectrum}{Sinclair Spectrum}. -

105 -

106 \table -

107 \row \li -

108 \inlineimage windows-lcdnumber.png Screenshot of a Windows style LCD number widget -

109 \inlineimage windowsvista-lcdnumber.png Screenshot of a Windows Vista style LCD number widget -

110 \inlineimage macintosh-lcdnumber.png Screenshot of a Macintosh style LCD number widget -

111 \inlineimage fusion-lcdnumber.png Screenshot of a Fusion style LCD number widget -

112 \row \li LCD number widgets shown in various widget styles (from left to right): -

113 \l{Windows Style Widget Gallery}{Windows}, \l{Windows Vista Style Widget Gallery}{Windows Vista}, -

114 \l{Macintosh Style Widget Gallery}{Macintosh}, \l{Fusion Style Widget Gallery}{Fusion}. -

115 \endtable -

116 -

117 \sa QLabel, QFrame, {Digital Clock Example}, {Tetrix Example} -

118 */ -

119 -

120 /*! -

121 \enum QLCDNumber::Mode -

122 -

123 This type determines how numbers are shown. -

124 -

125 \value Hex Hexadecimal -

126 \value Dec Decimal -

127 \value Oct Octal -

128 \value Bin Binary -

129 -

130 If the display is set to hexadecimal, octal or binary, the integer -

131 equivalent of the value is displayed. -

132 */ -

133 -

134 /*! -

135 \enum QLCDNumber::SegmentStyle -

136 -

137 This type determines the visual appearance of the QLCDNumber -

138 widget. -

139 -

140 \value Outline gives raised segments filled with the background color. -

141 \value Filled gives raised segments filled with the windowText color. -

142 \value Flat gives flat segments filled with the windowText color. -

143 */ -

144 -

145 -

146 -

147 /*! -

148 \fn void QLCDNumber::overflow() -

149 -

150 This signal is emitted whenever the QLCDNumber is asked to display -

151 a too-large number or a too-long string. -

152 -

153 It is never emitted by setDigitCount(). -

154 */ -

155 -

156 -

157 static QString int2string(int num, int base, int ndigits, bool *oflow) -

158 { -

159 QString s; -

160 bool negative; -

161 if (num < 0) { -

162 negative = true; -

163 num = -num; -

164 } else { -

165 negative = false; -

166 } -

167 switch(base) { -

168 case QLCDNumber::Hex: -

169 s = QString::asprintf("%*x", ndigits, num); -

170 break; -

171 case QLCDNumber::Dec: -

172 s = QString::asprintf("%*i", ndigits, num); -

173 break; -

174 case QLCDNumber::Oct: -

175 s = QString::asprintf("%*o", ndigits, num); -

176 break; -

177 case QLCDNumber::Bin: -

178 { -

179 char buf[42]; -

180 char *p = &buf[41]; -

181 uint n = num; -

182 int len = 0; -

183 *p = '\0'; -

184 do { -

185 *--p = (char)((n&1)+'0'); -

186 n >>= 1; -

187 len++; -

188 } while (n != 0); -

189 len = ndigits - len; -

190 if (len > 0) -

191 s.fill(QLatin1Char(' '), len); -

192 s += QString::fromLatin1(p); -

193 } -

194 break; -

195 } -

196 if (negative) { -

197 for (int i=0; i<(int)s.length(); i++) { -

198 if (s[i] != QLatin1Char(' ')) { -

199 if (i != 0) { -

200 s[i-1] = QLatin1Char('-'); -

201 } else { -

202 s.insert(0, QLatin1Char('-')); -

203 } -

204 break; -

205 } -

206 } -

207 } -

208 if (oflow) -

209 *oflow = (int)s.length() > ndigits; -

210 return s; -

211 } -

212 -

213 -

214 static QString double2string(double num, int base, int ndigits, bool *oflow) -

215 { -

216 QString s; -

217 if (base != QLCDNumber::Dec) { -

218 bool of = num >= 2147483648.0 || num < -2147483648.0; -

219 if (of) { // oops, integer overflow -

220 if (oflow) -

221 *oflow = true; -

222 return s; -

223 } -

224 s = int2string((int)num, base, ndigits, 0); -

225 } else { // decimal base -

226 int nd = ndigits; -

227 do { -

228 s = QString::asprintf("%*.*g", ndigits, nd, num); -

229 int i = s.indexOf(QLatin1Char('e')); -

230 if (i > 0 && s[i+1]==QLatin1Char('+')) { -

231 s[i] = QLatin1Char(' '); -

232 s[i+1] = QLatin1Char('e'); -

233 } -

234 } while (nd-- && (int)s.length() > ndigits); -

235 } -

236 if (oflow) -

237 *oflow = (int)s.length() > ndigits; -

238 return s; -

239 } -

240 -

241 -

242 static const char *getSegments(char ch) // gets list of segments for ch -

243 { -

244 static const char segments[30][8] = -

245 { { 0, 1, 2, 4, 5, 6,99, 0}, // 0 0 / O -

246 { 2, 5,99, 0, 0, 0, 0, 0}, // 1 1 -

247 { 0, 2, 3, 4, 6,99, 0, 0}, // 2 2 -

248 { 0, 2, 3, 5, 6,99, 0, 0}, // 3 3 -

249 { 1, 2, 3, 5,99, 0, 0, 0}, // 4 4 -

250 { 0, 1, 3, 5, 6,99, 0, 0}, // 5 5 / S -

251 { 0, 1, 3, 4, 5, 6,99, 0}, // 6 6 -

252 { 0, 2, 5,99, 0, 0, 0, 0}, // 7 7 -

253 { 0, 1, 2, 3, 4, 5, 6,99}, // 8 8 -

254 { 0, 1, 2, 3, 5, 6,99, 0}, // 9 9 / g -

255 { 3,99, 0, 0, 0, 0, 0, 0}, // 10 - -

256 { 7,99, 0, 0, 0, 0, 0, 0}, // 11 . -

257 { 0, 1, 2, 3, 4, 5,99, 0}, // 12 A -

258 { 1, 3, 4, 5, 6,99, 0, 0}, // 13 B -

259 { 0, 1, 4, 6,99, 0, 0, 0}, // 14 C -

260 { 2, 3, 4, 5, 6,99, 0, 0}, // 15 D -

261 { 0, 1, 3, 4, 6,99, 0, 0}, // 16 E -

262 { 0, 1, 3, 4,99, 0, 0, 0}, // 17 F -

263 { 1, 3, 4, 5,99, 0, 0, 0}, // 18 h -

264 { 1, 2, 3, 4, 5,99, 0, 0}, // 19 H -

265 { 1, 4, 6,99, 0, 0, 0, 0}, // 20 L -

266 { 3, 4, 5, 6,99, 0, 0, 0}, // 21 o -

267 { 0, 1, 2, 3, 4,99, 0, 0}, // 22 P -

268 { 3, 4,99, 0, 0, 0, 0, 0}, // 23 r -

269 { 4, 5, 6,99, 0, 0, 0, 0}, // 24 u -

270 { 1, 2, 4, 5, 6,99, 0, 0}, // 25 U -

271 { 1, 2, 3, 5, 6,99, 0, 0}, // 26 Y -

272 { 8, 9,99, 0, 0, 0, 0, 0}, // 27 : -

273 { 0, 1, 2, 3,99, 0, 0, 0}, // 28 ' -

274 {99, 0, 0, 0, 0, 0, 0, 0} }; // 29 empty -

275 -

276 if (ch >= '0' && ch <= '9') -

277 return segments[ch - '0']; -

278 if (ch >= 'A' && ch <= 'F') -

279 return segments[ch - 'A' + 12]; -

280 if (ch >= 'a' && ch <= 'f') -

281 return segments[ch - 'a' + 12]; -

282 -

283 int n; -

284 switch (ch) { -

285 case '-': -

286 n = 10; break; -

287 case 'O': -

288 n = 0; break; -

289 case 'g': -

290 n = 9; break; -

291 case '.': -

292 n = 11; break; -

293 case 'h': -

294 n = 18; break; -

295 case 'H': -

296 n = 19; break; -

297 case 'l': -

298 case 'L': -

299 n = 20; break; -

300 case 'o': -

301 n = 21; break; -

302 case 'p': -

303 case 'P': -

304 n = 22; break; -

305 case 'r': -

306 case 'R': -

307 n = 23; break; -

308 case 's': -

309 case 'S': -

310 n = 5; break; -

311 case 'u': -

312 n = 24; break; -

313 case 'U': -

314 n = 25; break; -

315 case 'y': -

316 case 'Y': -

317 n = 26; break; -

318 case ':': -

319 n = 27; break; -

320 case '\'': -

321 n = 28; break; -

322 default: -

323 n = 29; break; -

324 } -

325 return segments[n]; -

326 } -

327 -

328 -

329 -

330 /*! -

331 Constructs an LCD number, sets the number of digits to 5, the base -

332 to decimal, the decimal point mode to 'small' and the frame style -

333 to a raised box. The segmentStyle() is set to \c Outline. -

334 -

335 The \a parent argument is passed to the QFrame constructor. -

336 -

337 \sa setDigitCount(), setSmallDecimalPoint() -

338 */ -

339 -

340 QLCDNumber::QLCDNumber(QWidget *parent) -

341 : QFrame(*new QLCDNumberPrivate, parent) -

342 { -

343 Q_D(QLCDNumber); -

344 d->ndigits = 5; -

345 d->init(); -

346 } -

347 -

348 -

349 /*! -

350 Constructs an LCD number, sets the number of digits to \a -

351 numDigits, the base to decimal, the decimal point mode to 'small' -

352 and the frame style to a raised box. The segmentStyle() is set to -

353 \c Filled. -

354 -

355 The \a parent argument is passed to the QFrame constructor. -

356 -

357 \sa setDigitCount(), setSmallDecimalPoint() -

358 */ -

359 -

360 QLCDNumber::QLCDNumber(uint numDigits, QWidget *parent) -

361 : QFrame(*new QLCDNumberPrivate, parent) -

362 { -

363 Q_D(QLCDNumber); -

364 d->ndigits = numDigits; -

365 d->init(); -

366 } -

367 -

368 void QLCDNumberPrivate::init() -

369 { -

370 Q_Q(QLCDNumber); -

371 -

372 q->setFrameStyle(QFrame::Box | QFrame::Raised); -

373 val = 0; -

374 base = QLCDNumber::Dec; -

375 smallPoint = false; -

376 q->setDigitCount(ndigits); -

377 q->setSegmentStyle(QLCDNumber::Filled); -

378 q->setSizePolicy(QSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum)); -

379 } -

380 -

381 /*! -

382 Destroys the LCD number. -

383 */ -

384 -

385 QLCDNumber::~QLCDNumber() -

386 { -

387 } -

388 -

389 -

390 /*! -

391 \since 4.6 -

392 \property QLCDNumber::digitCount -

393 \brief the current number of digits displayed -

394 -

395 Corresponds to the current number of digits. If \l -

396 QLCDNumber::smallDecimalPoint is false, the decimal point occupies -

397 one digit position. -

398 -

399 By default, this property contains a value of 5. -

400 -

401 \sa smallDecimalPoint -

402 */ -

403 -

404 /*! -

405 Sets the current number of digits to \a numDigits. Must -

406 be in the range 0..99. -

407 */ -

408 void QLCDNumber::setDigitCount(int numDigits) -

409 { -

410 Q_D(QLCDNumber); -

411

if (Q_UNLIKELY(numDigits > 99))) {

__builtin_expe... > 99), false)	Description
TRUE	never evaluated
FALSE	never evaluated

412 qWarning("QLCDNumber::setNumDigits: (%s) Max 99 digits allowed", -

413 objectName().toLocal8Bit().constData()); -

414 numDigits = 99; -

415

}

never executed: end of block

416

if (Q_UNLIKELY(numDigits < 0))) {

__builtin_expe...s < 0), false)	Description
TRUE	never evaluated
FALSE	never evaluated

417 qWarning("QLCDNumber::setNumDigits: (%s) Min 0 digits allowed", -

418 objectName().toLocal8Bit().constData()); -

419 numDigits = 0; -

420

}

never executed: end of block

421

if (d->digitStr.isNull()) { // from constructor

d->digitStr.isNull()	Description
TRUE	never evaluated
FALSE	never evaluated

422 d->ndigits = numDigits; -

423 d->digitStr.fill(QLatin1Char(' '), d->ndigits); -

424 d->points.fill(0, d->ndigits); -

425 d->digitStr[d->ndigits - 1] = QLatin1Char('0'); // "0" is the default number -

426

} else {

never executed: end of block

427 bool doDisplay = d->ndigits == 0; -

428

if (numDigits == d->ndigits) // no change

numDigits == d->ndigits	Description
TRUE	never evaluated
FALSE	never evaluated

429

return;

never executed: return;

430 int i; -

431 int dif; -

432

if (numDigits > d->ndigits) { // expand

numDigits > d->ndigits	Description
TRUE	never evaluated
FALSE	never evaluated

433 dif = numDigits - d->ndigits; -

434 QString buf; -

435 buf.fill(QLatin1Char(' '), dif); -

436 d->digitStr.insert(0, buf); -

437 d->points.resize(numDigits); -

438

for (i=numDigits-1; i>=dif; i--)

i>=dif	Description
TRUE	never evaluated
FALSE	never evaluated

439

d->points.setBit(i, d->points.testBit(i-dif));

never executed: d->points.setBit(i, d->points.testBit(i-dif));

440

for (i=0; i<dif; i++)

i<dif	Description
TRUE	never evaluated
FALSE	never evaluated

441

d->points.clearBit(i);

never executed: d->points.clearBit(i);

442

} else { // shrink

never executed: end of block

443 dif = d->ndigits - numDigits; -

444 d->digitStr = d->digitStr.right(numDigits); -

445 QBitArray tmpPoints = d->points; -

446 d->points.resize(numDigits); -

447

for (i=0; i<(int)numDigits; i++)

i<(int)numDigits	Description
TRUE	never evaluated
FALSE	never evaluated

448

d->points.setBit(i, tmpPoints.testBit(i+dif));

never executed: d->points.setBit(i, tmpPoints.testBit(i+dif));

449

}

never executed: end of block

450 d->ndigits = numDigits; -

451

if (doDisplay)

doDisplay	Description
TRUE	never evaluated
FALSE	never evaluated

452

display(value());

never executed: display(value());

453 update(); -

454

}

never executed: end of block

455 } -

456 -

457 /*! -

458 Returns the current number of digits. -

459 */ -

460 int QLCDNumber::digitCount() const -

461 { -

462 Q_D(const QLCDNumber); -

463 return d->ndigits; -

464 } -

465 -

466 /*! -

467 \overload -

468 -

469 Returns \c true if \a num is too big to be displayed in its entirety; -

470 otherwise returns \c false. -

471 -

472 \sa display(), digitCount(), smallDecimalPoint() -

473 */ -

474 -

475 bool QLCDNumber::checkOverflow(int num) const -

476 { -

477 Q_D(const QLCDNumber); -

478 bool of; -

479 int2string(num, d->base, d->ndigits, &of); -

480 return of; -

481 } -

482 -

483 -

484 /*! -

485 Returns \c true if \a num is too big to be displayed in its entirety; -

486 otherwise returns \c false. -

487 -

488 \sa display(), digitCount(), smallDecimalPoint() -

489 */ -

490 -

491 bool QLCDNumber::checkOverflow(double num) const -

492 { -

493 Q_D(const QLCDNumber); -

494 bool of; -

495 double2string(num, d->base, d->ndigits, &of); -

496 return of; -

497 } -

498 -

499 -

500 /*! -

501 \property QLCDNumber::mode -

502 \brief the current display mode (number base) -

503 -

504 Corresponds to the current display mode, which is one of \c Bin, -

505 \c Oct, \c Dec (the default) and \c Hex. \c Dec mode can display -

506 floating point values, the other modes display the integer -

507 equivalent. -

508 -

509 \sa smallDecimalPoint(), setHexMode(), setDecMode(), setOctMode(), setBinMode() -

510 */ -

511 -

512 QLCDNumber::Mode QLCDNumber::mode() const -

513 { -

514 Q_D(const QLCDNumber); -

515 return (QLCDNumber::Mode) d->base; -

516 } -

517 -

518 void QLCDNumber::setMode(Mode m) -

519 { -

520 Q_D(QLCDNumber); -

521 d->base = m; -

522 display(d->val); -

523 } -

524 -

525 -

526 /*! -

527 \property QLCDNumber::value -

528 \brief the displayed value -

529 -

530 This property corresponds to the current value displayed by the -

531 LCDNumber. -

532 -

533 If the displayed value is not a number, the property has a value -

534 of 0. -

535 -

536 By default, this property contains a value of 0. -

537 */ -

538 -

539 double QLCDNumber::value() const -

540 { -

541 Q_D(const QLCDNumber); -

542 return d->val; -

543 } -

544 -

545 /*! -

546 \overload -

547 -

548 Displays the number \a num. -

549 */ -

550 void QLCDNumber::display(double num) -

551 { -

552 Q_D(QLCDNumber); -

553 d->val = num; -

554 bool of; -

555 QString s = double2string(d->val, d->base, d->ndigits, &of); -

556 if (of) -

557 emit overflow(); -

558 else -

559 d->internalSetString(s); -

560 } -

561 -

562 /*! -

563 \property QLCDNumber::intValue -

564 \brief the displayed value rounded to the nearest integer -

565 -

566 This property corresponds to the nearest integer to the current -

567 value displayed by the LCDNumber. This is the value used for -

568 hexadecimal, octal and binary modes. -

569 -

570 If the displayed value is not a number, the property has a value -

571 of 0. -

572 -

573 By default, this property contains a value of 0. -

574 */ -

575 int QLCDNumber::intValue() const -

576 { -

577 Q_D(const QLCDNumber); -

578 return qRound(d->val); -

579 } -

580 -

581 -

582 /*! -

583 \overload -

584 -

585 Displays the number \a num. -

586 */ -

587 void QLCDNumber::display(int num) -

588 { -

589 Q_D(QLCDNumber); -

590 d->val = (double)num; -

591 bool of; -

592 QString s = int2string(num, d->base, d->ndigits, &of); -

593 if (of) -

594 emit overflow(); -

595 else -

596 d->internalSetString(s); -

597 } -

598 -

599 -

600 /*! -

601 Displays the number represented by the string \a s. -

602 -

603 This version of the function disregards mode() and -

604 smallDecimalPoint(). -

605 -

606 These digits and other symbols can be shown: 0/O, 1, 2, 3, 4, 5/S, -

607 6, 7, 8, 9/g, minus, decimal point, A, B, C, D, E, F, h, H, L, o, -

608 P, r, u, U, Y, colon, degree sign (which is specified as single -

609 quote in the string) and space. QLCDNumber substitutes spaces for -

610 illegal characters. -

611 */ -

612 -

613 void QLCDNumber::display(const QString &s) -

614 { -

615 Q_D(QLCDNumber); -

616 d->val = 0; -

617 bool ok = false; -

618 double v = s.toDouble(&ok); -

619 if (ok) -

620 d->val = v; -

621 d->internalSetString(s); -

622 } -

623 -

624 /*! -

625 Calls setMode(Hex). Provided for convenience (e.g. for -

626 connecting buttons to it). -

627 -

628 \sa setMode(), setDecMode(), setOctMode(), setBinMode(), mode() -

629 */ -

630 -

631 void QLCDNumber::setHexMode() -

632 { -

633 setMode(Hex); -

634 } -

635 -

636 -

637 /*! -

638 Calls setMode(Dec). Provided for convenience (e.g. for -

639 connecting buttons to it). -

640 -

641 \sa setMode(), setHexMode(), setOctMode(), setBinMode(), mode() -

642 */ -

643 -

644 void QLCDNumber::setDecMode() -

645 { -

646 setMode(Dec); -

647 } -

648 -

649 -

650 /*! -

651 Calls setMode(Oct). Provided for convenience (e.g. for -

652 connecting buttons to it). -

653 -

654 \sa setMode(), setHexMode(), setDecMode(), setBinMode(), mode() -

655 */ -

656 -

657 void QLCDNumber::setOctMode() -

658 { -

659 setMode(Oct); -

660 } -

661 -

662 -

663 /*! -

664 Calls setMode(Bin). Provided for convenience (e.g. for -

665 connecting buttons to it). -

666 -

667 \sa setMode(), setHexMode(), setDecMode(), setOctMode(), mode() -

668 */ -

669 -

670 void QLCDNumber::setBinMode() -

671 { -

672 setMode(Bin); -

673 } -

674 -

675 -

676 /*! -

677 \property QLCDNumber::smallDecimalPoint -

678 \brief the style of the decimal point -

679 -

680 If true the decimal point is drawn between two digit positions. -

681 Otherwise it occupies a digit position of its own, i.e. is drawn -

682 in a digit position. The default is false. -

683 -

684 The inter-digit space is made slightly wider when the decimal -

685 point is drawn between the digits. -

686 -

687 \sa mode -

688 */ -

689 -

690 void QLCDNumber::setSmallDecimalPoint(bool b) -

691 { -

692 Q_D(QLCDNumber); -

693 d->smallPoint = b; -

694 update(); -

695 } -

696 -

697 bool QLCDNumber::smallDecimalPoint() const -

698 { -

699 Q_D(const QLCDNumber); -

700 return d->smallPoint; -

701 } -

702 -

703 -

704 -

705 /*!\reimp -

706 */ -

707 -

708 -

709 void QLCDNumber::paintEvent(QPaintEvent *) -

710 { -

711 Q_D(QLCDNumber); -

712 QPainter p(this); -

713 drawFrame(&p); -

714 p.setRenderHint(QPainter::Antialiasing); -

715 if (d->shadow) -

716 p.translate(0.5, 0.5); -

717 -

718 if (d->smallPoint) -

719 d->drawString(d->digitStr, p, &d->points, false); -

720 else -

721 d->drawString(d->digitStr, p, 0, false); -

722 } -

723 -

724 -

725 void QLCDNumberPrivate::internalSetString(const QString& s) -

726 { -

727 Q_Q(QLCDNumber); -

728 QString buffer; -

729 int i; -

730 int len = s.length(); -

731 QBitArray newPoints(ndigits); -

732 -

733 if (!smallPoint) { -

734 if (len == ndigits) -

735 buffer = s; -

736 else -

737 buffer = s.right(ndigits).rightJustified(ndigits, QLatin1Char(' ')); -

738 } else { -

739 int index = -1; -

740 bool lastWasPoint = true; -

741 newPoints.clearBit(0); -

742 for (i=0; i<len; i++) { -

743 if (s[i] == QLatin1Char('.')) { -

744 if (lastWasPoint) { // point already set for digit? -

745 if (index == ndigits - 1) // no more digits -

746 break; -

747 index++; -

748 buffer[index] = QLatin1Char(' '); // 2 points in a row, add space -

749 } -

750 newPoints.setBit(index); // set decimal point -

751 lastWasPoint = true; -

752 } else { -

753 if (index == ndigits - 1) -

754 break; -

755 index++; -

756 buffer[index] = s[i]; -

757 newPoints.clearBit(index); // decimal point default off -

758 lastWasPoint = false; -

759 } -

760 } -

761 if (index < ((int) ndigits) - 1) { -

762 for(i=index; i>=0; i--) { -

763 buffer[ndigits - 1 - index + i] = buffer[i]; -

764 newPoints.setBit(ndigits - 1 - index + i, -

765 newPoints.testBit(i)); -

766 } -

767 for(i=0; i<ndigits-index-1; i++) { -

768 buffer[i] = QLatin1Char(' '); -

769 newPoints.clearBit(i); -

770 } -

771 } -

772 } -

773 -

774 if (buffer == digitStr) -

775 return; -

776 -

777 digitStr = buffer; -

778 if (smallPoint) -

779 points = newPoints; -

780 q->update(); -

781 } -

782 -

783 /*! -

784 \internal -

785 */ -

786 -

787 void QLCDNumberPrivate::drawString(const QString &s, QPainter &p, -

788 QBitArray *newPoints, bool newString) -

789 { -

790 Q_Q(QLCDNumber); -

791 QPoint pos; -

792 -

793 int digitSpace = smallPoint ? 2 : 1; -

794 int xSegLen = q->width()*5/(ndigits*(5 + digitSpace) + digitSpace); -

795 int ySegLen = q->height()*5/12; -

796 int segLen = ySegLen > xSegLen ? xSegLen : ySegLen; -

797 int xAdvance = segLen*(5 + digitSpace)/5; -

798 int xOffset = (q->width() - ndigits*xAdvance + segLen/5)/2; -

799 int yOffset = (q->height() - segLen*2)/2; -

800 -

801 for (int i=0; i<ndigits; i++) { -

802 pos = QPoint(xOffset + xAdvance*i, yOffset); -

803 if (newString) -

804 drawDigit(pos, p, segLen, s[i].toLatin1(), digitStr[i].toLatin1()); -

805 else -

806 drawDigit(pos, p, segLen, s[i].toLatin1()); -

807 if (newPoints) { -

808 char newPoint = newPoints->testBit(i) ? '.' : ' '; -

809 if (newString) { -

810 char oldPoint = points.testBit(i) ? '.' : ' '; -

811 drawDigit(pos, p, segLen, newPoint, oldPoint); -

812 } else { -

813 drawDigit(pos, p, segLen, newPoint); -

814 } -

815 } -

816 } -

817 if (newString) { -

818 digitStr = s; -

819 digitStr.truncate(ndigits); -

820 if (newPoints) -

821 points = *newPoints; -

822 } -

823 } -

824 -

825 -

826 /*! -

827 \internal -

828 */ -

829 -

830 void QLCDNumberPrivate::drawDigit(const QPoint &pos, QPainter &p, int segLen, -

831 char newCh, char oldCh) -

832 { -

833 // Draws and/or erases segments to change display of a single digit -

834 // from oldCh to newCh -

835 -

836 char updates[18][2]; // can hold 2 times number of segments, only -

837 // first 9 used if segment table is correct -

838 int nErases; -

839 int nUpdates; -

840 const char *segs; -

841 int i,j; -

842 -

843 const char erase = 0; -

844 const char draw = 1; -

845 const char leaveAlone = 2; -

846 -

847 segs = getSegments(oldCh); -

848 for (nErases=0; segs[nErases] != 99; nErases++) { -

849 updates[nErases][0] = erase; // get segments to erase to -

850 updates[nErases][1] = segs[nErases]; // remove old char -

851 } -

852 nUpdates = nErases; -

853 segs = getSegments(newCh); -

854 for(i = 0 ; segs[i] != 99 ; i++) { -

855 for (j=0; j<nErases; j++) -

856 if (segs[i] == updates[j][1]) { // same segment ? -

857 updates[j][0] = leaveAlone; // yes, already on screen -

858 break; -

859 } -

860 if (j == nErases) { // if not already on screen -

861 updates[nUpdates][0] = draw; -

862 updates[nUpdates][1] = segs[i]; -

863 nUpdates++; -

864 } -

865 } -

866 for (i=0; i<nUpdates; i++) { -

867 if (updates[i][0] == draw) -

868 drawSegment(pos, updates[i][1], p, segLen); -

869 if (updates[i][0] == erase) -

870 drawSegment(pos, updates[i][1], p, segLen, true); -

871 } -

872 } -

873 -

874 -

875 static void addPoint(QPolygon &a, const QPoint &p) -

876 { -

877 uint n = a.size(); -

878 a.resize(n + 1); -

879 a.setPoint(n, p); -

880 } -

881 -

882 /*! -

883 \internal -

884 */ -

885 -

886 void QLCDNumberPrivate::drawSegment(const QPoint &pos, char segmentNo, QPainter &p, -

887 int segLen, bool erase) -

888 { -

889 Q_Q(QLCDNumber); -

890 QPoint ppt; -

891 QPoint pt = pos; -

892 int width = segLen/5; -

893 -

894 const QPalette &pal = q->palette(); -

895 QColor lightColor,darkColor,fgColor; -

896 if (erase){ -

897 lightColor = pal.color(q->backgroundRole()); -

898 darkColor = lightColor; -

899 fgColor = lightColor; -

900 } else { -

901 lightColor = pal.light().color(); -

902 darkColor = pal.dark().color(); -

903 fgColor = pal.color(q->foregroundRole()); -

904 } -

905 -

906 -

907 #define LINETO(X,Y) addPoint(a, QPoint(pt.x() + (X),pt.y() + (Y))) -

908 #define LIGHT -

909 #define DARK -

910 -

911 if (fill) { -

912 QPolygon a(0); -

913 //The following is an exact copy of the switch below. -

914 //don't make any changes here -

915 switch (segmentNo) { -

916 case 0 : -

917 ppt = pt; -

918 LIGHT; -

919 LINETO(segLen - 1,0); -

920 DARK; -

921 LINETO(segLen - width - 1,width); -

922 LINETO(width,width); -

923 LINETO(0,0); -

924 break; -

925 case 1 : -

926 pt += QPoint(0 , 1); -

927 ppt = pt; -

928 LIGHT; -

929 LINETO(width,width); -

930 DARK; -

931 LINETO(width,segLen - width/2 - 2); -

932 LINETO(0,segLen - 2); -

933 LIGHT; -

934 LINETO(0,0); -

935 break; -

936 case 2 : -

937 pt += QPoint(segLen - 1 , 1); -

938 ppt = pt; -

939 DARK; -

940 LINETO(0,segLen - 2); -

941 LINETO(-width,segLen - width/2 - 2); -

942 LIGHT; -

943 LINETO(-width,width); -

944 LINETO(0,0); -

945 break; -

946 case 3 : -

947 pt += QPoint(0 , segLen); -

948 ppt = pt; -

949 LIGHT; -

950 LINETO(width,-width/2); -

951 LINETO(segLen - width - 1,-width/2); -

952 LINETO(segLen - 1,0); -

953 DARK; -

954 if (width & 1) { // adjust for integer division error -

955 LINETO(segLen - width - 3,width/2 + 1); -

956 LINETO(width + 2,width/2 + 1); -

957 } else { -

958 LINETO(segLen - width - 1,width/2); -

959 LINETO(width,width/2); -

960 } -

961 LINETO(0,0); -

962 break; -

963 case 4 : -

964 pt += QPoint(0 , segLen + 1); -

965 ppt = pt; -

966 LIGHT; -

967 LINETO(width,width/2); -

968 DARK; -

969 LINETO(width,segLen - width - 2); -

970 LINETO(0,segLen - 2); -

971 LIGHT; -

972 LINETO(0,0); -

973 break; -

974 case 5 : -

975 pt += QPoint(segLen - 1 , segLen + 1); -

976 ppt = pt; -

977 DARK; -

978 LINETO(0,segLen - 2); -

979 LINETO(-width,segLen - width - 2); -

980 LIGHT; -

981 LINETO(-width,width/2); -

982 LINETO(0,0); -

983 break; -

984 case 6 : -

985 pt += QPoint(0 , segLen*2); -

986 ppt = pt; -

987 LIGHT; -

988 LINETO(width,-width); -

989 LINETO(segLen - width - 1,-width); -

990 LINETO(segLen - 1,0); -

991 DARK; -

992 LINETO(0,0); -

993 break; -

994 case 7 : -

995 if (smallPoint) // if smallpoint place'.' between other digits -

996 pt += QPoint(segLen + width/2 , segLen*2); -

997 else -

998 pt += QPoint(segLen/2 , segLen*2); -

999 ppt = pt; -

1000 DARK; -

1001 LINETO(width,0); -

1002 LINETO(width,-width); -

1003 LIGHT; -

1004 LINETO(0,-width); -

1005 LINETO(0,0); -

1006 break; -

1007 case 8 : -

1008 pt += QPoint(segLen/2 - width/2 + 1 , segLen/2 + width); -

1009 ppt = pt; -

1010 DARK; -

1011 LINETO(width,0); -

1012 LINETO(width,-width); -

1013 LIGHT; -

1014 LINETO(0,-width); -

1015 LINETO(0,0); -

1016 break; -

1017 case 9 : -

1018 pt += QPoint(segLen/2 - width/2 + 1 , 3*segLen/2 + width); -

1019 ppt = pt; -

1020 DARK; -

1021 LINETO(width,0); -

1022 LINETO(width,-width); -

1023 LIGHT; -

1024 LINETO(0,-width); -

1025 LINETO(0,0); -

1026 break; -

1027 default : -

1028 qWarning("QLCDNumber::drawSegment: (%s) Illegal segment id: %d\n", -

1029 q->objectName().toLocal8Bit().constData(), segmentNo); -

1030 } -

1031 // End exact copy -

1032 p.setPen(Qt::NoPen); -

1033 p.setBrush(fgColor); -

1034 p.drawPolygon(a); -

1035 p.setBrush(Qt::NoBrush); -

1036 -

1037 pt = pos; -

1038 } -

1039 #undef LINETO -

1040 #undef LIGHT -

1041 #undef DARK -

1042 -

1043 #define LINETO(X,Y) p.drawLine(ppt.x(), ppt.y(), pt.x()+(X), pt.y()+(Y)); \ -

1044 ppt = QPoint(pt.x()+(X), pt.y()+(Y)) -

1045 #define LIGHT p.setPen(lightColor) -

1046 #define DARK p.setPen(darkColor) -

1047 if (shadow) -

1048 switch (segmentNo) { -

1049 case 0 : -

1050 ppt = pt; -

1051 LIGHT; -

1052 LINETO(segLen - 1,0); -

1053 DARK; -

1054 LINETO(segLen - width - 1,width); -

1055 LINETO(width,width); -

1056 LINETO(0,0); -

1057 break; -

1058 case 1 : -

1059 pt += QPoint(0,1); -

1060 ppt = pt; -

1061 LIGHT; -

1062 LINETO(width,width); -

1063 DARK; -

1064 LINETO(width,segLen - width/2 - 2); -

1065 LINETO(0,segLen - 2); -

1066 LIGHT; -

1067 LINETO(0,0); -

1068 break; -

1069 case 2 : -

1070 pt += QPoint(segLen - 1 , 1); -

1071 ppt = pt; -

1072 DARK; -

1073 LINETO(0,segLen - 2); -

1074 LINETO(-width,segLen - width/2 - 2); -

1075 LIGHT; -

1076 LINETO(-width,width); -

1077 LINETO(0,0); -

1078 break; -

1079 case 3 : -

1080 pt += QPoint(0 , segLen); -

1081 ppt = pt; -

1082 LIGHT; -

1083 LINETO(width,-width/2); -

1084 LINETO(segLen - width - 1,-width/2); -

1085 LINETO(segLen - 1,0); -

1086 DARK; -

1087 if (width & 1) { // adjust for integer division error -

1088 LINETO(segLen - width - 3,width/2 + 1); -

1089 LINETO(width + 2,width/2 + 1); -

1090 } else { -

1091 LINETO(segLen - width - 1,width/2); -

1092 LINETO(width,width/2); -

1093 } -

1094 LINETO(0,0); -

1095 break; -

1096 case 4 : -

1097 pt += QPoint(0 , segLen + 1); -

1098 ppt = pt; -

1099 LIGHT; -

1100 LINETO(width,width/2); -

1101 DARK; -

1102 LINETO(width,segLen - width - 2); -

1103 LINETO(0,segLen - 2); -

1104 LIGHT; -

1105 LINETO(0,0); -

1106 break; -

1107 case 5 : -

1108 pt += QPoint(segLen - 1 , segLen + 1); -

1109 ppt = pt; -

1110 DARK; -

1111 LINETO(0,segLen - 2); -

1112 LINETO(-width,segLen - width - 2); -

1113 LIGHT; -

1114 LINETO(-width,width/2); -

1115 LINETO(0,0); -

1116 break; -

1117 case 6 : -

1118 pt += QPoint(0 , segLen*2); -

1119 ppt = pt; -

1120 LIGHT; -

1121 LINETO(width,-width); -

1122 LINETO(segLen - width - 1,-width); -

1123 LINETO(segLen - 1,0); -

1124 DARK; -

1125 LINETO(0,0); -

1126 break; -

1127 case 7 : -

1128 if (smallPoint) // if smallpoint place'.' between other digits -

1129 pt += QPoint(segLen + width/2 , segLen*2); -

1130 else -

1131 pt += QPoint(segLen/2 , segLen*2); -

1132 ppt = pt; -

1133 DARK; -

1134 LINETO(width,0); -

1135 LINETO(width,-width); -

1136 LIGHT; -

1137 LINETO(0,-width); -

1138 LINETO(0,0); -

1139 break; -

1140 case 8 : -

1141 pt += QPoint(segLen/2 - width/2 + 1 , segLen/2 + width); -

1142 ppt = pt; -

1143 DARK; -

1144 LINETO(width,0); -

1145 LINETO(width,-width); -

1146 LIGHT; -

1147 LINETO(0,-width); -

1148 LINETO(0,0); -

1149 break; -

1150 case 9 : -

1151 pt += QPoint(segLen/2 - width/2 + 1 , 3*segLen/2 + width); -

1152 ppt = pt; -

1153 DARK; -

1154 LINETO(width,0); -

1155 LINETO(width,-width); -

1156 LIGHT; -

1157 LINETO(0,-width); -

1158 LINETO(0,0); -

1159 break; -

1160 default : -

1161 qWarning("QLCDNumber::drawSegment: (%s) Illegal segment id: %d\n", -

1162 q->objectName().toLocal8Bit().constData(), segmentNo); -

1163 } -

1164 -

1165 #undef LINETO -

1166 #undef LIGHT -

1167 #undef DARK -

1168 } -

1169 -

1170 -

1171 -

1172 /*! -

1173 \property QLCDNumber::segmentStyle -

1174 \brief the style of the LCDNumber -

1175 -

1176 \table -

1177 \header \li Style \li Result -

1178 \row \li \c Outline -

1179 \li Produces raised segments filled with the background color -

1180 \row \li \c Filled -

1181 (this is the default). -

1182 \li Produces raised segments filled with the foreground color. -

1183 \row \li \c Flat -

1184 \li Produces flat segments filled with the foreground color. -

1185 \endtable -

1186 -

1187 \c Outline and \c Filled will additionally use -

1188 QPalette::light() and QPalette::dark() for shadow effects. -

1189 */ -

1190 void QLCDNumber::setSegmentStyle(SegmentStyle s) -

1191 { -

1192 Q_D(QLCDNumber); -

1193 d->fill = (s == Flat || s == Filled); -

1194 d->shadow = (s == Outline || s == Filled); -

1195 update(); -

1196 } -

1197 -

1198 QLCDNumber::SegmentStyle QLCDNumber::segmentStyle() const -

1199 { -

1200 Q_D(const QLCDNumber); -

1201 Q_ASSERT(d->fill || d->shadow); -

1202 if (!d->fill && d->shadow) -

1203 return Outline; -

1204 if (d->fill && d->shadow) -

1205 return Filled; -

1206 return Flat; -

1207 } -

1208 -

1209 -

1210 /*!\reimp -

1211 */ -

1212 QSize QLCDNumber::sizeHint() const -

1213 { -

1214 return QSize(10 + 9 * (digitCount() + (smallDecimalPoint() ? 0 : 1)), 23); -

1215 } -

1216 -

1217 /*! \reimp */ -

1218 bool QLCDNumber::event(QEvent *e) -

1219 { -

1220 return QFrame::event(e); -

1221 } -

1222 -

1223 QT_END_NAMESPACE -

1224 -

1225 #include "moc_qlcdnumber.cpp" -

1226 -

1227 #endif // QT_NO_LCDNUMBER -

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