Text Layout with Qt

5FYU3FOEFSJOHXJUI2U 2U֥໓Чᛴಙ࠯ඌ ࡾࡿ KJBOHKJBOH!OPLJBDPN

ܱႿ໡ Ֆᇏ॓ჽ࠹ෘ෮иြၛުđᄝ/PLJB ύථ੤֥2U๭ྙቆ۽ቔਔ၂୍϶Ġ ༟ߋ࿹࣮۲ᇕ໓Чᛴಙ࠯ඌđູ2U षؿؓႋۿିĠ ಣιႪ࿮֥ሳุބஆϱĠι؀॓ߘཬ ඪaҕაषჷཛଢb • •
•

୆ݺ2U

ᄸહႨ2UϜ෱ᛴಙ֞௠ଞഈĤ

QLabel QLabel

QTextEdit/QLineEdit QTextEdit/QLineEdit

2.-5FYU&MFNFOU

TextEdit/TextInput

)5.-JO28FC7JFX

QPainter::drawText QPainter::drawText

ߎႵ۷ਲࠃི֥ۚٚمગĤ

୆߶ਔࢳ֞൉હĤ Ֆ໓Чࢳ༅֞ཁൕཞ෍֥ಆݖӱ 2U৚૫෮Ⴕཁൕ໓Ч֥ٚمđ෱ૌ֥Ⴊׄ ಌׄđൡႨٓຶ 2Uᄝ۲۱௜෻༯൞ᄸဢൌགྷؓႋۿି֥ • • •

E4BDA0E5A5BD5174 E4BDA0E5A5BD5174

E4BDA0 E5A5BD 51 74 E4BDA0 E5A5BD 51 74

65' U+4F60 U+597D U+0051 U+0074 U+4F60 U+597D U+0051 U+0074

୆ݺ2U 6 ' 6 % 6 6

QString::fromUtf8(" QString::fromUtf8("Qt") Qt")

ః෰щ઒Ĥ QTextCodec *codec = QTextCodec::codecForName("GB18030-0"); QString str = codec->toUnicode("...");

ଽ҆ൌགྷཬᆩ് 24USJOHଽ҆൐Ⴈ65'-&Ќթሳژ Աđؓႋ2$IBS֥྽ਙđૄ۱2$IBS൞ ၂۱65'-&ս઒ׄ ᄝ6OJDPEF#.1ၛຓ֥ նਈܞࠡᇏ֥ ݱሳ Ⴈਆ۱৵࿃֥2$IBSіൕ ބ8JOEPXT.BD049֩ӈ࡮༢๤֥ჰ
ള"1*၂ᇁđॖၛᆰࢤሇߐ • • •

໓Чᛴಙ֥ݖӱ ሳژіղ ሳุྐ༏ ሳุ ሳྙა໊ ᇂྐ༏ ஆϱႄౣ ሳุࢳ༅ ሳุ९
ܻᅅ߄

ሳุ

Arial Times Verdana Nokia Pure Text
Nokia Sans

ሳุ९

ሳุ९֥թԥ໊ᇂ 4ZTUFN-JCSBSZ'POUT -JCSBSZ'POUT _-JCSBSZ'POUT $=8JOEPXT='POUT VTSTIBSFGPOUT _GPOUT

ೂޅ๙ݖӱ྽٠໙ሳุ९Ĥ

௜෻ჰള֥ሳุܵ৘ &OVN'POU'BNJMJFT %8SJUF'POU$PMMFDUJPO "QQMF5ZQF4FSWJDFT $5'POU$PMMFDUJPO.BOBHFS GPOUDPOGJH

ॴ௜෻ሳุܵ৘ 2'POU 2'POU%BUBCBTF

࿊ᄴ၂۱ሳุ QFont f("Helvetica"); f.setWeight(QFont::Bold); f.setStyle(QFont::StyleOblique); Helvetica Bold Oblique

ਙԛॖ࿊ሳุ QFontDatabase db; QStringList families = db.families(); for (int
i; i < families.size(); i++) qDebug() << families[i] << db.styles(families[i]); Arial (Bold, Regular, Oblique, Bold Oblique) Heiti SC (Light, Medium) ...

ܻᅅ߄

ሳุ֥ࢳ༅

$."1 ሳژ DIBSBDUFS ሳྙ෬ႄ HMZQI 6 ' 6
% 6 6

ሳྙ੽ক

ଽ҆ൌགྷཬᆩ് .BD 9 8JOEPXT ሳุ९ "54 $PSF5FYU GPOUDPOGJH
(%* %JSFDU8SJUF ሳุᄛೆ $PSF5FYU 'SFF5ZQF

໊ᇂ࠹ෘ

ሳए GPOUNFUSJDT

HMZQINFUSJDT QFontMetrics:: boundingRect(ch)

2'POU.FUSJDT QFont f("STHeiti"); QFontMetrics m(f); QString str = QString::fromUtf8("Qt");
m.boundingRect(str); m.height(); m.ascent(); m.descent(); ... ๤၂ࠆ౼ ሳएྐ༏ ֥ٚൔ

୆ݺ2U֥ए৖ྐ༏ ሳژ ሳྙ෬ႄ BEWBODF QY ჰ໊ׄᇂ ࡌഡ ູఏׄ
୆ ݺ 2 U

ܻᅅ߄

҃अ࠹ෘߎླေॉ੮

ࡗएטᆜ LFSOJOH ৵ሳ MJHBUVSF ูߐሳྙ

ൗࢸ۲ֹ֥඀ཿ༢๤

2U൐Ⴈ֥ॴ௜෻ஆϱႄౣ )BSG#V[[ ऎุൌགྷ༥ࢫ൞ؓ2Uӱ྽ჴ๩ૼ֥

ࡼሳྙ੽কሇߐູཞ෍ SBTUFSJ[BUJPO ܻᅅ߄

ᛴಙิൕ IJOUJOH ҂൐Ⴈ WFSUJDBM IJOUJOH

QFont::setHintingPreference PreferDefaultHinting PreferNoHinting PreferVerticalHinting PreferFullHinting

ᄝၛ༯ݖӱᇏປӮ QPainter::drawText {QLabel/QTextEdit/QLineEdit}::paint QPainter::drawStaticText QTextLayout::draw QPainter::drawGlyphRun • • •
• •

ଽ҆ൌགྷཬᆩ് 2Uᄝ҂๝௜෻༯ิ܂ჰള֥ሳุᛴಙğ 8JOEPXT༯Ⴈ(%*%JSFDU8SJUF .BD049༯Ⴈ$PSF(SBQIJDT 9༯Ⴈ'SFF5ZQF ؓႿնႿQY֥ሳุđႨ21BJOUFSᆰ ࢤᛴಙ൏ਈ੽ক 2U༯ᆦӻEJTUBODFGJFMEᛴಙ •
– – – • •

໓Чᛴಙ֥ݖӱཬࢲ ሳژіղ ሳุྐ༏ ሳุ ሳྙა໊ ᇂྐ༏ ஆϱႄౣ ሳุࢳ༅ ሳุ९
ܻᅅ߄

2Uሳุ༢๤ࡏܒ 'POU3FOEFSFS %JTUBODF'JFME /BUJWF '5 $( (%* %8 -BZPVU&OHJOF)BSG#V[[
1MBUGPSN'POU%BUBCBTF CBTJD GPOUDPOGJH DPSFUFYU XJOEPXT

۲௜෻༯֥2Uൌགྷཬࢲ .BD 9 8JOEPXT 21" ሳุ९ "54 $PSF5FYU GPOUDPOGJH
(%* %JSFDU8SJUF CBTJD GPOUDPOGJH DPSFUFYU ሳุᄛೆ $PSF5FYU 'SFF5ZQF 'SFF5ZQF $PSF5FYU ஆϱ $PSF5FYU )BSG#V[[ )BSG#V[[ ᛴಙ $PSF5FYU 'SFF5ZQF (%* %JSFDU8SJUF %JTUBODF 'JFME /BUJWF

൐Ⴈ2U߻ᇅ໓Ч֥۲ᇕٚൔ

2.-5FYUჭ෍ Text { text: "Qt" font.family: "STHeiti" font.pointSize: 24
color: "red" }

໓Ч॥ࡱ 2-BCFM 2-JOF&EJU 25FYU&EJU

QTextEdit textEdit(str); textEdit.document()->setDefaultFont(f); textEdit.show(); QLineEdit lineEdit(str); lineEdit.setFont(f); lineEdit.show(); QString
str = QString::fromUtf8("Qt"); QFont f("STHeiti"); QLabel label(str); label.setFont(f); label.show();

21BJOUFSESBX5FYU

ESBX5FYU֥ҕඔ ୆ݺ2U ໓Чჰׄ ຓॿ ؓఊ

ૄՑ׻ေᇗྍ҃अđིੱ҂ۚ

class MyWidget: public QWidget { public: MyWidget(QWidget *parent =
0) : QWidget(parent) protected: void paintEvent(QPaintEvent *) { QPainter painter(this); painter.setFont(QFont("STHeiti")); painter.drawText(50, 50, QString::fromUtf8("Qt")); } };

24UBUJD5FYU 2U

ߏթ҃अྐ༏ၛิۚᇗ߻෎؇

҂ߏթᛴಙު๭ཞၛࢫസଽթ

ྟିбࢠ _ _ _

24UBUJD5FYUൡކᄝଽթႵཋ֥ ഡСഈླေّگᇗ߻֥ࢸ૫ჭ෍

class MyWidget: public QWidget { public: MyWidget(QWidget *parent =
0) : QWidget(parent), m_staticText(QString::fromUtf8("Qt")) protected: void paintEvent(QPaintEvent *) { QPainter painter(this); painter.setFont(QFont("STHeiti")); painter.drawStaticText(50, 50, m_staticText); } private: QStaticText m_staticText; };

25FYU-BZPVU

ӈ࡮֥໓Чஆϱଆൔ

໓Чߌಡ

҂ܿᄵྙሑ

25FYU-BZPVUᄍྸ୆॥ᇅૄྛ ໓Ч໊֥ᇂaэߐ࢘؇აྙሑ

QFont f("STHeiti"); QFontMetrics fontMetrics(f); QTextLayout textLayout(QString::fromUtf8("Qt"), f); int leading
= fontMetrics.leading(); qreal height = 0; textLayout.beginLayout(); while (1) { QTextLine line = textLayout.createLine(); if (!line.isValid()) break; line.setLineWidth(lineWidth); height += leading; line.setPosition(QPointF(0, height)); height += line.height(); } textLayout.endLayout(); QPainter p(this); textLayout.draw(&p, QPointF(50, 50));

ቋָҪğ23BX'POU 2(MZQI3VO

2'POUWT23BX'POU

2'POUሳุ࿊ᄴ౨౰֥ࠢކ

2'POU Ⴈ޼ğ ေ7FSEBOBሳุቂ ေุོ ေՙุ ༢๤ğ ቋ௄஥ᆃ۱౨౰֥ሳุ൞ "/Library/Fonts/Verdana Bold
Italic.ttf" • – – – • –

23BX'POU࿊ק֥ൌ࠽ሳุ

2(MZQI3VO ၂۱23BX'POU ؟ؓ ሳྙ෬ႄ ໊ᇂ

ႨႿླေᆰࢤߏթ߻ᇅሳྙൈğ 2U8FC,JUބ2.-4DFOF(SBQI

QFont f("Nokia Pure Text"); QFontMetrics fontMetrics(f); QTextLayout textLayout(QString::fromUtf8("Qt"), f);
... textLayout.endLayout(); // QGlyphRun QList<QGlyphRun> glyphRuns = textLayout.glyphRuns(); QPainter p(this); // STHeiti "" p.drawGlyphRun(QPointF(50, 50), glyphRuns[0]); // Nokia Pure Text "Qt" p.drawGlyphRun(QPointF(50, 50), glyphRuns[1]);

ીႵ௴ൡ֥໓ЧᛴಙٚمĆ

۴ऌႋႨླ౰࿊ᄴކൡ֥ٚم ߋ႒࠿࿃ิ໙

ҕॉ໓֖ 4UBUFPG5FYU3FOEFSJOHCZ#FIEBE&TGBICPE IUUQCFIEBEPSHUFYU ໓Чᛴಙ࠯ඌ֥၂Ց؋๯੪ྛCZ+JBOH+JBOH IUUQKKHPEPSHEPDTTMJEFTUFYUSFOEFSJOHUFDIQEG %JTUBODF'JFMEሳุᛴಙ࠯ඌࢺകCZ:PBOO-PQFT IUUQMBCTRUOPLJBDPNUFYUSFOEFSJOHJOUIF RNMTDFOFHSBQI 23BX'POUა2(MZQI3VOࢺകCZ&TLJM"CSBIBNTFO#MPNGFMEU IUUQMBCTRUOPLJBDPNIJOUIJOUOVEHFOVEHF
TBZOPNPSF 24UBUJD5FYUࢺകCZ&TLJM"CSBIBNTFO IUUQMBCTRUOPLJBDPNJOTBOJUZJTTIBQJOHUIF TBNFUFYUBHBJOBOEFYQFDUJOHBEJGGFSFOUSFTVMU • • • • •

໙ีĤ

Text Layout with Qt

Text Layout with Qt

More Decks by Jiang Jiang

Other Decks in Technology

Featured

Transcript