/**************************************************************************** ** ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the QtDeclarative module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** No Commercial Usage ** This file contains pre-release code and may not be distributed. ** You may use this file in accordance with the terms and conditions ** contained in the Technology Preview License Agreement accompanying ** this package. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 2.1 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 2.1 requirements ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, Nokia gives you certain additional ** rights. These rights are described in the Nokia Qt LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** If you have questions regarding the use of this file, please contact ** Nokia at qt-info@nokia.com. ** ** ** ** ** ** ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #include "private/qdeclarativetext_p.h" #include "private/qdeclarativetext_p_p.h" #include #include #include #include #include #include #include #include #include #include #include #include QT_BEGIN_NAMESPACE extern Q_GUI_EXPORT bool qt_applefontsmoothing_enabled; class QTextDocumentWithImageResources : public QTextDocument { Q_OBJECT public: QTextDocumentWithImageResources(QDeclarativeText *parent); virtual ~QTextDocumentWithImageResources(); void setText(const QString &); int resourcesLoading() const { return outstanding; } protected: QVariant loadResource(int type, const QUrl &name); private slots: void requestFinished(); private: QHash m_resources; int outstanding; static QSet errors; }; QTextDocumentWithImageResources::QTextDocumentWithImageResources(QDeclarativeText *parent) : QTextDocument(parent), outstanding(0) { } QTextDocumentWithImageResources::~QTextDocumentWithImageResources() { if (!m_resources.isEmpty()) qDeleteAll(m_resources); } QVariant QTextDocumentWithImageResources::loadResource(int type, const QUrl &name) { QDeclarativeContext *context = qmlContext(parent()); QUrl url = context->resolvedUrl(name); if (type == QTextDocument::ImageResource) { QHash::Iterator iter = m_resources.find(url); if (iter == m_resources.end()) { QDeclarativePixmap *p = new QDeclarativePixmap(context->engine(), url); iter = m_resources.insert(name, p); if (p->isLoading()) { p->connectFinished(this, SLOT(requestFinished())); outstanding++; } } QDeclarativePixmap *p = *iter; if (p->isReady()) { return p->pixmap(); } else if (p->isError()) { if (!errors.contains(url)) { errors.insert(url); qmlInfo(parent()) << p->error(); } } } return QTextDocument::loadResource(type,url); // The *resolved* URL } void QTextDocumentWithImageResources::requestFinished() { outstanding--; if (outstanding == 0) { QDeclarativeText *textItem = static_cast(parent()); QString text = textItem->text(); #ifndef QT_NO_TEXTHTMLPARSER setHtml(text); #else setPlainText(text); #endif QDeclarativeTextPrivate *d = QDeclarativeTextPrivate::get(textItem); d->updateLayout(); d->markImgDirty(); } } void QTextDocumentWithImageResources::setText(const QString &text) { if (!m_resources.isEmpty()) { qWarning("CLEAR"); qDeleteAll(m_resources); m_resources.clear(); outstanding = 0; } #ifndef QT_NO_TEXTHTMLPARSER setHtml(text); #else setPlainText(text); #endif } QSet QTextDocumentWithImageResources::errors; /*! \qmlclass Text QDeclarativeText \ingroup qml-basic-visual-elements \since 4.7 \brief The Text item allows you to add formatted text to a scene. \inherits Item A Text item can display both plain and rich text. For example: \qml Text { text: "Hello World!"; font.family: "Helvetica"; font.pointSize: 24; color: "red" } Text { text: "Hello World!" } \endqml \image declarative-text.png If height and width are not explicitly set, Text will attempt to determine how much room is needed and set it accordingly. Unless \l wrapMode is set, it will always prefer width to height (all text will be placed on a single line). The \l elide property can alternatively be used to fit a single line of plain text to a set width. Note that the \l{Supported HTML Subset} is limited. Also, if the text contains HTML img tags that load remote images, the text is reloaded. Text provides read-only text. For editable text, see \l TextEdit. \sa {declarative/text/fonts}{Fonts example} */ QDeclarativeText::QDeclarativeText(QDeclarativeItem *parent) : QDeclarativeItem(*(new QDeclarativeTextPrivate), parent) { } QDeclarativeText::~QDeclarativeText() { } QDeclarativeTextPrivate::~QDeclarativeTextPrivate() { } /*! \qmlproperty string Text::font.family Sets the family name of the font. The family name is case insensitive and may optionally include a foundry name, e.g. "Helvetica [Cronyx]". If the family is available from more than one foundry and the foundry isn't specified, an arbitrary foundry is chosen. If the family isn't available a family will be set using the font matching algorithm. */ /*! \qmlproperty bool Text::font.bold Sets whether the font weight is bold. */ /*! \qmlproperty enumeration Text::font.weight Sets the font's weight. The weight can be one of: \list \o Font.Light \o Font.Normal - the default \o Font.DemiBold \o Font.Bold \o Font.Black \endlist \qml Text { text: "Hello"; font.weight: Font.DemiBold } \endqml */ /*! \qmlproperty bool Text::font.italic Sets whether the font has an italic style. */ /*! \qmlproperty bool Text::font.underline Sets whether the text is underlined. */ /*! \qmlproperty bool Text::font.strikeout Sets whether the font has a strikeout style. */ /*! \qmlproperty real Text::font.pointSize Sets the font size in points. The point size must be greater than zero. */ /*! \qmlproperty int Text::font.pixelSize Sets the font size in pixels. Using this function makes the font device dependent. Use \c pointSize to set the size of the font in a device independent manner. */ /*! \qmlproperty real Text::font.letterSpacing Sets the letter spacing for the font. Letter spacing changes the default spacing between individual letters in the font. A positive value increases the letter spacing by the corresponding pixels; a negative value decreases the spacing. */ /*! \qmlproperty real Text::font.wordSpacing Sets the word spacing for the font. Word spacing changes the default spacing between individual words. A positive value increases the word spacing by a corresponding amount of pixels, while a negative value decreases the inter-word spacing accordingly. */ /*! \qmlproperty enumeration Text::font.capitalization Sets the capitalization for the text. \list \o Font.MixedCase - This is the normal text rendering option where no capitalization change is applied. \o Font.AllUppercase - This alters the text to be rendered in all uppercase type. \o Font.AllLowercase - This alters the text to be rendered in all lowercase type. \o Font.SmallCaps - This alters the text to be rendered in small-caps type. \o Font.Capitalize - This alters the text to be rendered with the first character of each word as an uppercase character. \endlist \qml Text { text: "Hello"; font.capitalization: Font.AllLowercase } \endqml */ QFont QDeclarativeText::font() const { Q_D(const QDeclarativeText); return d->font; } void QDeclarativeText::setFont(const QFont &font) { Q_D(QDeclarativeText); if (d->font == font) return; d->font = font; d->updateLayout(); d->markImgDirty(); emit fontChanged(d->font); } void QDeclarativeText::setText(const QString &n) { Q_D(QDeclarativeText); if (d->text == n) return; d->richText = d->format == RichText || (d->format == AutoText && Qt::mightBeRichText(n)); if (d->richText) { if (isComponentComplete()) { d->ensureDoc(); d->doc->setText(n); } } d->text = n; d->updateLayout(); d->markImgDirty(); emit textChanged(d->text); } /*! \qmlproperty string Text::text The text to display. Text supports both plain and rich text strings. The item will try to automatically determine whether the text should be treated as rich text. This determination is made using Qt::mightBeRichText(). */ QString QDeclarativeText::text() const { Q_D(const QDeclarativeText); return d->text; } void QDeclarativeText::setColor(const QColor &color) { Q_D(QDeclarativeText); if (d->color == color) return; d->color = color; d->markImgDirty(); emit colorChanged(d->color); } /*! \qmlproperty color Text::color The text color. \qml //green text using hexadecimal notation Text { color: "#00FF00"; ... } //steelblue text using SVG color name Text { color: "steelblue"; ... } \endqml */ QColor QDeclarativeText::color() const { Q_D(const QDeclarativeText); return d->color; } /*! \qmlproperty enumeration Text::style Set an additional text style. Supported text styles are: \list \o Text.Normal - the default \o Text.Outline \o Text.Raised \o Text.Sunken \endlist \qml Row { Text { font.pointSize: 24; text: "Normal" } Text { font.pointSize: 24; text: "Raised"; style: Text.Raised; styleColor: "#AAAAAA" } Text { font.pointSize: 24; text: "Outline";style: Text.Outline; styleColor: "red" } Text { font.pointSize: 24; text: "Sunken"; style: Text.Sunken; styleColor: "#AAAAAA" } } \endqml \image declarative-textstyle.png */ QDeclarativeText::TextStyle QDeclarativeText::style() const { Q_D(const QDeclarativeText); return d->style; } void QDeclarativeText::setStyle(QDeclarativeText::TextStyle style) { Q_D(QDeclarativeText); if (d->style == style) return; // changing to/from Normal requires the boundingRect() to change if (isComponentComplete() && (d->style == Normal || style == Normal)) prepareGeometryChange(); d->style = style; d->markImgDirty(); emit styleChanged(d->style); } void QDeclarativeText::setStyleColor(const QColor &color) { Q_D(QDeclarativeText); if (d->styleColor == color) return; d->styleColor = color; d->markImgDirty(); emit styleColorChanged(d->styleColor); } /*! \qmlproperty color Text::styleColor Defines the secondary color used by text styles. \c styleColor is used as the outline color for outlined text, and as the shadow color for raised or sunken text. If no style has been set, it is not used at all. \qml Text { font.pointSize: 18; text: "hello"; style: Text.Raised; styleColor: "gray" } \endqml \sa style */ QColor QDeclarativeText::styleColor() const { Q_D(const QDeclarativeText); return d->styleColor; } /*! \qmlproperty enumeration Text::horizontalAlignment \qmlproperty enumeration Text::verticalAlignment Sets the horizontal and vertical alignment of the text within the Text items width and height. By default, the text is top-left aligned. The valid values for \c horizontalAlignment are \c Text.AlignLeft, \c Text.AlignRight and \c Text.AlignHCenter. The valid values for \c verticalAlignment are \c Text.AlignTop, \c Text.AlignBottom and \c Text.AlignVCenter. Note that for a single line of text, the size of the text is the area of the text. In this common case, all alignments are equivalent. If you want the text to be, say, centered in it parent, then you will need to either modify the Item::anchors, or set horizontalAlignment to Text.AlignHCenter and bind the width to that of the parent. */ QDeclarativeText::HAlignment QDeclarativeText::hAlign() const { Q_D(const QDeclarativeText); return d->hAlign; } void QDeclarativeText::setHAlign(HAlignment align) { Q_D(QDeclarativeText); if (d->hAlign == align) return; if (isComponentComplete()) prepareGeometryChange(); d->hAlign = align; emit horizontalAlignmentChanged(align); } QDeclarativeText::VAlignment QDeclarativeText::vAlign() const { Q_D(const QDeclarativeText); return d->vAlign; } void QDeclarativeText::setVAlign(VAlignment align) { Q_D(QDeclarativeText); if (d->vAlign == align) return; if (isComponentComplete()) prepareGeometryChange(); d->vAlign = align; emit verticalAlignmentChanged(align); } /*! \qmlproperty enumeration Text::wrapMode Set this property to wrap the text to the Text item's width. The text will only wrap if an explicit width has been set. wrapMode can be one of: \list \o Text.NoWrap (default) - no wrapping will be performed. If the text contains insufficient newlines, then \l paintedWidth will exceed a set width. \o Text.WordWrap - wrapping is done on word boundaries only. If a word is too long, \l paintedWidth will exceed a set width. \o Text.WrapAnywhere - wrapping is done at any point on a line, even if it occurs in the middle of a word. \o Text.Wrap - if possible, wrapping occurs at a word boundary; otherwise it will occur at the appropriate point on the line, even in the middle of a word. \endlist */ QDeclarativeText::WrapMode QDeclarativeText::wrapMode() const { Q_D(const QDeclarativeText); return d->wrapMode; } void QDeclarativeText::setWrapMode(WrapMode mode) { Q_D(QDeclarativeText); if (mode == d->wrapMode) return; d->wrapMode = mode; d->updateLayout(); d->markImgDirty(); emit wrapModeChanged(); } /*! \qmlproperty enumeration Text::textFormat The way the text property should be displayed. Supported text formats are: \list \o Text.AutoText (default) \o Text.PlainText \o Text.RichText \o Text.StyledText \endlist If the text format is \c Text.AutoText the text element will automatically determine whether the text should be treated as rich text. This determination is made using Qt::mightBeRichText(). Text.StyledText is an optimized format supporting some basic text styling markup, in the style of html 3.2: \code font size and color bold italic
> < & \endcode \c Text.StyledText parser is strict, requiring tags to be correctly nested. \table \row \o \qml Column { Text { font.pointSize: 24 text: "Hello World!" } Text { font.pointSize: 24 textFormat: Text.RichText text: "Hello World!" } Text { font.pointSize: 24 textFormat: Text.PlainText text: "Hello World!" } } \endqml \o \image declarative-textformat.png \endtable */ QDeclarativeText::TextFormat QDeclarativeText::textFormat() const { Q_D(const QDeclarativeText); return d->format; } void QDeclarativeText::setTextFormat(TextFormat format) { Q_D(QDeclarativeText); if (format == d->format) return; d->format = format; bool wasRich = d->richText; d->richText = format == RichText || (format == AutoText && Qt::mightBeRichText(d->text)); if (wasRich && !d->richText) { //### delete control? (and vice-versa below) d->updateLayout(); d->markImgDirty(); } else if (!wasRich && d->richText) { if (isComponentComplete()) { d->ensureDoc(); d->doc->setText(d->text); } d->updateLayout(); d->markImgDirty(); } emit textFormatChanged(d->format); } /*! \qmlproperty enumeration Text::elide Set this property to elide parts of the text fit to the Text item's width. The text will only elide if an explicit width has been set. This property cannot be used with wrapping enabled or with rich text. Eliding can be: \list \o Text.ElideNone - the default \o Text.ElideLeft \o Text.ElideMiddle \o Text.ElideRight \endlist If the text is a multi-length string, and the mode is not \c Text.ElideNone, the first string that fits will be used, otherwise the last will be elided. Multi-length strings are ordered from longest to shortest, separated by the Unicode "String Terminator" character \c U009C (write this in QML with \c{"\u009C"} or \c{"\x9C"}). */ QDeclarativeText::TextElideMode QDeclarativeText::elideMode() const { Q_D(const QDeclarativeText); return d->elideMode; } void QDeclarativeText::setElideMode(QDeclarativeText::TextElideMode mode) { Q_D(QDeclarativeText); if (mode == d->elideMode) return; d->elideMode = mode; d->updateLayout(); d->markImgDirty(); emit elideModeChanged(d->elideMode); } QRectF QDeclarativeText::boundingRect() const { Q_D(const QDeclarativeText); int w = width(); int h = height(); int x = 0; int y = 0; QSize size = d->cachedLayoutSize; if (d->style != Normal) size += QSize(2,2); // Could include font max left/right bearings to either side of rectangle. switch (d->hAlign) { case AlignLeft: x = 0; break; case AlignRight: x = w - size.width(); break; case AlignHCenter: x = (w - size.width()) / 2; break; } switch (d->vAlign) { case AlignTop: y = 0; break; case AlignBottom: y = h - size.height(); break; case AlignVCenter: y = (h - size.height()) / 2; break; } return QRectF(x,y,size.width(),size.height()); } void QDeclarativeText::geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry) { Q_D(QDeclarativeText); if (!d->internalWidthUpdate && newGeometry.width() != oldGeometry.width()) { if (d->wrapMode != QDeclarativeText::NoWrap || d->elideMode != QDeclarativeText::ElideNone) { //re-elide if needed if (d->singleline && d->elideMode != QDeclarativeText::ElideNone && isComponentComplete() && widthValid()) { QFontMetrics fm(d->font); QString tmp = fm.elidedText(d->text,(Qt::TextElideMode)d->elideMode,width()); // XXX still worth layout...? d->layout.setText(tmp); } d->imgDirty = true; d->updateSize(); } } QDeclarativeItem::geometryChanged(newGeometry, oldGeometry); } void QDeclarativeTextPrivate::updateLayout() { Q_Q(QDeclarativeText); if (q->isComponentComplete()) { //setup instance of QTextLayout for all cases other than richtext if (!richText) { layout.clearLayout(); layout.setFont(font); if (format != QDeclarativeText::StyledText) { QString tmp = text; tmp.replace(QLatin1Char('\n'), QChar::LineSeparator); singleline = !tmp.contains(QChar::LineSeparator); if (singleline && elideMode != QDeclarativeText::ElideNone && q->widthValid()) { QFontMetrics fm(font); tmp = fm.elidedText(tmp,(Qt::TextElideMode)elideMode,q->width()); // XXX still worth layout...? } layout.setText(tmp); } else { singleline = false; QDeclarativeStyledText::parse(text, layout); } } updateSize(); } else { dirty = true; } } void QDeclarativeTextPrivate::updateSize() { Q_Q(QDeclarativeText); if (q->isComponentComplete()) { QFontMetrics fm(font); if (text.isEmpty()) { q->setImplicitHeight(fm.height()); emit q->paintedSizeChanged(); return; } int dy = q->height(); QSize size(0, 0); //setup instance of QTextLayout for all cases other than richtext if (!richText) { size = setupTextLayout(&layout); if (cachedLayoutSize != size) { q->prepareGeometryChange(); cachedLayoutSize = size; } dy -= size.height(); } else { singleline = false; // richtext can't elide or be optimized for single-line case ensureDoc(); doc->setDefaultFont(font); QTextOption option((Qt::Alignment)int(hAlign | vAlign)); option.setWrapMode(QTextOption::WrapMode(wrapMode)); doc->setDefaultTextOption(option); if (wrapMode != QDeclarativeText::NoWrap && q->widthValid()) doc->setTextWidth(q->width()); else doc->setTextWidth(doc->idealWidth()); // ### Text does not align if width is not set (QTextDoc bug) dy -= (int)doc->size().height(); QSize dsize = doc->size().toSize(); if (dsize != cachedLayoutSize) { q->prepareGeometryChange(); cachedLayoutSize = dsize; } size = QSize(int(doc->idealWidth()),dsize.height()); } int yoff = 0; if (q->heightValid()) { if (vAlign == QDeclarativeText::AlignBottom) yoff = dy; else if (vAlign == QDeclarativeText::AlignVCenter) yoff = dy/2; } q->setBaselineOffset(fm.ascent() + yoff); //### need to comfirm cost of always setting these for richText internalWidthUpdate = true; q->setImplicitWidth(size.width()); internalWidthUpdate = false; q->setImplicitHeight(size.height()); emit q->paintedSizeChanged(); } else { dirty = true; } } /*! \qmlproperty real Text::paintedWidth Returns the width of the text, including width past the width which is covered due to insufficient wrapping if WrapMode is set. */ qreal QDeclarativeText::paintedWidth() const { return implicitWidth(); } /*! \qmlproperty real Text::paintedHeight Returns the height of the text, including height past the height which is covered due to there being more text than fits in the set height. */ qreal QDeclarativeText::paintedHeight() const { return implicitHeight(); } // ### text layout handling should be profiled and optimized as needed // what about QStackTextEngine engine(tmp, d->font.font()); QTextLayout textLayout(&engine); void QDeclarativeTextPrivate::drawOutline() { QPixmap img = QPixmap(imgStyleCache.width()+2,imgStyleCache.height()+2); img.fill(Qt::transparent); QPainter ppm(&img); QPoint pos(imgCache.rect().topLeft()); pos += QPoint(-1, 0); ppm.drawPixmap(pos, imgStyleCache); pos += QPoint(2, 0); ppm.drawPixmap(pos, imgStyleCache); pos += QPoint(-1, -1); ppm.drawPixmap(pos, imgStyleCache); pos += QPoint(0, 2); ppm.drawPixmap(pos, imgStyleCache); pos += QPoint(0, -1); ppm.drawPixmap(pos, imgCache); ppm.end(); imgCache = img; } void QDeclarativeTextPrivate::drawOutline(int yOffset) { QPixmap img = QPixmap(imgStyleCache.width()+2,imgStyleCache.height()+2); img.fill(Qt::transparent); QPainter ppm(&img); QPoint pos(imgCache.rect().topLeft()); pos += QPoint(0, yOffset); ppm.drawPixmap(pos, imgStyleCache); pos += QPoint(0, -yOffset); ppm.drawPixmap(pos, imgCache); ppm.end(); imgCache = img; } QSize QDeclarativeTextPrivate::setupTextLayout(QTextLayout *layout) { Q_Q(QDeclarativeText); layout->setCacheEnabled(true); int height = 0; qreal widthUsed = 0; qreal lineWidth = 0; //set manual width if ((wrapMode != QDeclarativeText::NoWrap || elideMode != QDeclarativeText::ElideNone) && q->widthValid()) lineWidth = q->width(); QTextOption textOption = layout->textOption(); textOption.setWrapMode(QTextOption::WrapMode(wrapMode)); layout->setTextOption(textOption); layout->beginLayout(); while (1) { QTextLine line = layout->createLine(); if (!line.isValid()) break; if ((wrapMode != QDeclarativeText::NoWrap || elideMode != QDeclarativeText::ElideNone) && q->widthValid()) line.setLineWidth(lineWidth); } layout->endLayout(); int x = 0; for (int i = 0; i < layout->lineCount(); ++i) { QTextLine line = layout->lineAt(i); widthUsed = qMax(widthUsed, line.naturalTextWidth()); line.setPosition(QPointF(0, height)); height += int(line.height()); if (!cache) { if (hAlign == QDeclarativeText::AlignLeft) { x = 0; } else if (hAlign == QDeclarativeText::AlignRight) { x = q->width() - (int)line.naturalTextWidth(); } else if (hAlign == QDeclarativeText::AlignHCenter) { x = (q->width() - (int)line.naturalTextWidth()) / 2; } line.setPosition(QPoint(x, (int)line.y())); } } return QSize(qCeil(widthUsed), height); } QPixmap QDeclarativeTextPrivate::wrappedTextImage(bool drawStyle) { //do layout QSize size = cachedLayoutSize; int x = 0; for (int i = 0; i < layout.lineCount(); ++i) { QTextLine line = layout.lineAt(i); if (hAlign == QDeclarativeText::AlignLeft) { x = 0; } else if (hAlign == QDeclarativeText::AlignRight) { x = size.width() - (int)line.naturalTextWidth(); } else if (hAlign == QDeclarativeText::AlignHCenter) { x = (size.width() - (int)line.naturalTextWidth()) / 2; } line.setPosition(QPoint(x, (int)line.y())); } //paint text QPixmap img(size); if (!size.isEmpty()) { img.fill(Qt::transparent); #ifdef Q_WS_MAC bool oldSmooth = qt_applefontsmoothing_enabled; qt_applefontsmoothing_enabled = false; #endif QPainter p(&img); #ifdef Q_WS_MAC qt_applefontsmoothing_enabled = oldSmooth; #endif drawWrappedText(&p, QPointF(0,0), drawStyle); } return img; } void QDeclarativeTextPrivate::drawWrappedText(QPainter *p, const QPointF &pos, bool drawStyle) { if (drawStyle) p->setPen(styleColor); else p->setPen(color); p->setFont(font); layout.draw(p, pos); } QPixmap QDeclarativeTextPrivate::richTextImage(bool drawStyle) { QSize size = doc->size().toSize(); //paint text QPixmap img(size); img.fill(Qt::transparent); #ifdef Q_WS_MAC bool oldSmooth = qt_applefontsmoothing_enabled; qt_applefontsmoothing_enabled = false; #endif QPainter p(&img); #ifdef Q_WS_MAC qt_applefontsmoothing_enabled = oldSmooth; #endif QAbstractTextDocumentLayout::PaintContext context; QTextOption oldOption(doc->defaultTextOption()); if (drawStyle) { context.palette.setColor(QPalette::Text, styleColor); QTextOption colorOption(doc->defaultTextOption()); colorOption.setFlags(QTextOption::SuppressColors); doc->setDefaultTextOption(colorOption); } else { context.palette.setColor(QPalette::Text, color); } doc->documentLayout()->draw(&p, context); if (drawStyle) doc->setDefaultTextOption(oldOption); return img; } void QDeclarativeTextPrivate::checkImgCache() { if (!imgDirty) return; bool empty = text.isEmpty(); QPixmap newImgCache; if (empty) { imgStyleCache = QPixmap(); } else if (richText) { newImgCache = richTextImage(false); if (style != QDeclarativeText::Normal) imgStyleCache = richTextImage(true); //### should use styleColor } else { newImgCache = wrappedTextImage(false); if (style != QDeclarativeText::Normal) imgStyleCache = wrappedTextImage(true); //### should use styleColor } imgCache = newImgCache; if (!empty) switch (style) { case QDeclarativeText::Outline: drawOutline(); break; case QDeclarativeText::Sunken: drawOutline(-1); break; case QDeclarativeText::Raised: drawOutline(1); break; default: break; } imgDirty = false; } void QDeclarativeTextPrivate::ensureDoc() { if (!doc) { Q_Q(QDeclarativeText); doc = new QTextDocumentWithImageResources(q); doc->setDocumentMargin(0); } } /*! Returns the number of resources (images) that are being loaded asynchronously. */ int QDeclarativeText::resourcesLoading() const { Q_D(const QDeclarativeText); return d->doc ? d->doc->resourcesLoading() : 0; } /*! \qmlproperty bool Text::clip This property holds whether the text is clipped. Note that if the text does not fit in the bounding rectangle it will be abruptly chopped. If you want to display potentially long text in a limited space, you probably want to use \c elide instead. */ void QDeclarativeText::paint(QPainter *p, const QStyleOptionGraphicsItem *, QWidget *) { Q_D(QDeclarativeText); if (d->cache || d->style != Normal) { d->checkImgCache(); if (d->imgCache.isNull()) return; bool oldAA = p->testRenderHint(QPainter::Antialiasing); bool oldSmooth = p->testRenderHint(QPainter::SmoothPixmapTransform); if (d->smooth) p->setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform, d->smooth); QRect br = boundingRect().toRect(); bool needClip = clip() && (d->imgCache.width() > width() || d->imgCache.height() > height()); if (needClip) p->drawPixmap(0, 0, width(), height(), d->imgCache, -br.x(), -br.y(), width(), height()); else p->drawPixmap(br.x(), br.y(), d->imgCache); if (d->smooth) { p->setRenderHint(QPainter::Antialiasing, oldAA); p->setRenderHint(QPainter::SmoothPixmapTransform, oldSmooth); } } else { qreal y = boundingRect().y(); bool needClip = !clip() && (d->cachedLayoutSize.width() > width() || d->cachedLayoutSize.height() > height()); if (needClip) { p->save(); p->setClipRect(0, 0, width(), height(), Qt::IntersectClip); } if (d->richText) { QAbstractTextDocumentLayout::PaintContext context; context.palette.setColor(QPalette::Text, d->color); p->translate(0, y); d->doc->documentLayout()->draw(p, context); p->translate(0, -y); } else { d->drawWrappedText(p, QPointF(0,y), false); } if (needClip) p->restore(); } } /*! \qmlproperty bool Text::smooth This property holds whether the text is smoothly scaled or transformed. Smooth filtering gives better visual quality, but is slower. If the item is displayed at its natural size, this property has no visual or performance effect. \note Generally scaling artifacts are only visible if the item is stationary on the screen. A common pattern when animating an item is to disable smooth filtering at the beginning of the animation and reenable it at the conclusion. */ void QDeclarativeText::componentComplete() { Q_D(QDeclarativeText); QDeclarativeItem::componentComplete(); if (d->dirty) { if (d->richText) { d->ensureDoc(); d->doc->setText(d->text); } d->updateLayout(); d->dirty = false; } } /*! \overload Handles the given mouse \a event. */ void QDeclarativeText::mousePressEvent(QGraphicsSceneMouseEvent *event) { Q_D(QDeclarativeText); if (!d->richText || !d->doc || d->doc->documentLayout()->anchorAt(event->pos()).isEmpty()) { event->setAccepted(false); d->activeLink.clear(); } else { d->activeLink = d->doc->documentLayout()->anchorAt(event->pos()); } // ### may malfunction if two of the same links are clicked & dragged onto each other) if (!event->isAccepted()) QDeclarativeItem::mousePressEvent(event); } /*! \qmlsignal Text::onLinkActivated(string link) This handler is called when the user clicks on a link embedded in the text. The link must be in rich text or HTML format and the \a link string provides access to the particular link. \snippet doc/src/snippets/declarative/text/onLinkActivated.qml 0 The example code will display the text "The main website is at \l{http://qt.nokia.com}{Nokia Qt DF}." Clicking on the highlighted link will output \tt{http://qt.nokia.com link activated} to the console. */ /*! \overload Handles the given mouse \a event. */ void QDeclarativeText::mouseReleaseEvent(QGraphicsSceneMouseEvent *event) { Q_D(QDeclarativeText); // ### confirm the link, and send a signal out if (d->richText && d->doc && d->activeLink == d->doc->documentLayout()->anchorAt(event->pos())) emit linkActivated(d->activeLink); else event->setAccepted(false); if (!event->isAccepted()) QDeclarativeItem::mouseReleaseEvent(event); } QT_END_NAMESPACE #include "qdeclarativetext.moc"