C++ QRawFont::lineThickness方法代码示例

void QSGTextNode::addTextLayout(const QPointF &position, QTextLayout *textLayout, const QColor &color,
                                QSGText::TextStyle style, const QColor &styleColor)
{
    QList<QGlyphRun> glyphsList(textLayout->glyphRuns());

    QSGGlyphNode *prevNode = 0;

    QFont font = textLayout->font();
    qreal underlinePosition, ascent, lineThickness;
    int decorations = NoDecoration;
    decorations |= (font.underline() ? Underline : 0);
    decorations |= (font.overline()  ? Overline  : 0);
    decorations |= (font.strikeOut() ? StrikeOut : 0);

    underlinePosition = ascent = lineThickness = 0;
    for (int i=0; i<glyphsList.size(); ++i) {
        QGlyphRun glyphs = glyphsList.at(i);
        QRawFont rawfont = glyphs.rawFont();
        prevNode = addGlyphs(position + QPointF(0, rawfont.ascent()), glyphs, color, style, styleColor);

        if (decorations) {
            qreal rawAscent = rawfont.ascent();
            if (decorations & Underline) {
                ascent = qMax(ascent, rawAscent);
                qreal pos = rawfont.underlinePosition();
                if (pos > underlinePosition) {
                    underlinePosition = pos;
                    // take line thickness from the rawfont with maximum underline
                    // position in this case
                    lineThickness = rawfont.lineThickness();
                }
            } else {
                // otherwise it's strike out or overline, we take line thickness
                // from the rawfont with maximum ascent
                if (rawAscent > ascent) {
                    ascent = rawAscent;
                    lineThickness = rawfont.lineThickness();
                }
            }
        }
    }

    if (decorations) {
        addTextDecorations(Decoration(decorations), position + QPointF(0, ascent), color,
                           textLayout->boundingRect().width(),
                           lineThickness, underlinePosition, ascent);
    }
}

void QSGTextNode::addTextBlock(const QPointF &position, QTextDocument *textDocument, const QTextBlock &block,
                               const QColor &overrideColor, QSGText::TextStyle style, const QColor &styleColor)
{
    if (!block.isValid())
        return;

    QPointF blockPosition = textDocument->documentLayout()->blockBoundingRect(block).topLeft();

    QTextBlock::iterator it = block.begin();
    while (!it.atEnd()) {
        QTextFragment fragment = it.fragment();
        if (!fragment.text().isEmpty()) {
            QTextCharFormat charFormat = fragment.charFormat();
            QColor color = overrideColor.isValid()
                    ? overrideColor
                    : charFormat.foreground().color();

            QList<QGlyphRun> glyphsList = fragment.glyphRuns();
            for (int i=0; i<glyphsList.size(); ++i) {
                QGlyphRun glyphs = glyphsList.at(i);
                QRawFont font = glyphs.rawFont();
                QSGGlyphNode *glyphNode = addGlyphs(position + blockPosition + QPointF(0, font.ascent()),
                                                    glyphs, color, style, styleColor);
                int decorations = (glyphs.overline() ? Overline : 0) |
                                  (glyphs.strikeOut() ? StrikeOut : 0) |
                                  (glyphs.underline() ? Underline : 0);
                if (decorations) {
                    QPointF baseLine = glyphNode->baseLine();
                    qreal width = glyphNode->boundingRect().width();
                    addTextDecorations(Decoration(decorations), baseLine, color, width,
                                       font.lineThickness(), font.underlinePosition(), font.ascent());
                }
            }
        }

        ++it;
    }
}

void QQuickTextNodeEngine::processCurrentLine()
{
    // No glyphs, do nothing
    if (m_currentLineTree.isEmpty())
        return;

    // 1. Go through current line and get correct decoration position for each node based on
    // neighbouring decorations. Add decoration to global list
    // 2. Create clip nodes for all selected text. Try to merge as many as possible within
    // the line.
    // 3. Add QRects to a list of selection rects.
    // 4. Add all nodes to a global processed list
    QVarLengthArray<int> sortedIndexes; // Indexes in tree sorted by x position
    BinaryTreeNode::inOrder(m_currentLineTree, &sortedIndexes);

    Q_ASSERT(sortedIndexes.size() == m_currentLineTree.size());

    SelectionState currentSelectionState = Unselected;
    QRectF currentRect;

    QQuickTextNode::Decorations currentDecorations = QQuickTextNode::NoDecoration;
    qreal underlineOffset = 0.0;
    qreal underlineThickness = 0.0;

    qreal overlineOffset = 0.0;
    qreal overlineThickness = 0.0;

    qreal strikeOutOffset = 0.0;
    qreal strikeOutThickness = 0.0;

    QRectF decorationRect = currentRect;

    QColor lastColor;
    QColor lastBackgroundColor;

    QVarLengthArray<TextDecoration> pendingUnderlines;
    QVarLengthArray<TextDecoration> pendingOverlines;
    QVarLengthArray<TextDecoration> pendingStrikeOuts;
    if (!sortedIndexes.isEmpty()) {
        QQuickDefaultClipNode *currentClipNode = m_hasSelection ? new QQuickDefaultClipNode(QRectF()) : 0;
        bool currentClipNodeUsed = false;
        for (int i=0; i<=sortedIndexes.size(); ++i) {
            BinaryTreeNode *node = 0;
            if (i < sortedIndexes.size()) {
                int sortedIndex = sortedIndexes.at(i);
                Q_ASSERT(sortedIndex < m_currentLineTree.size());

                node = m_currentLineTree.data() + sortedIndex;
            }

            if (i == 0)
                currentSelectionState = node->selectionState;

            // Update decorations
            if (currentDecorations != QQuickTextNode::NoDecoration) {
                decorationRect.setY(m_position.y() + m_currentLine.y());
                decorationRect.setHeight(m_currentLine.height());

                if (node != 0)
                    decorationRect.setRight(node->boundingRect.left());

                TextDecoration textDecoration(currentSelectionState, decorationRect, lastColor);
                if (currentDecorations & QQuickTextNode::Underline)
                    pendingUnderlines.append(textDecoration);

                if (currentDecorations & QQuickTextNode::Overline)
                    pendingOverlines.append(textDecoration);

                if (currentDecorations & QQuickTextNode::StrikeOut)
                    pendingStrikeOuts.append(textDecoration);

                if (currentDecorations & QQuickTextNode::Background)
                    m_backgrounds.append(qMakePair(decorationRect, lastBackgroundColor));
            }

            // If we've reached an unselected node from a selected node, we add the
            // selection rect to the graph, and we add decoration every time the
            // selection state changes, because that means the text color changes
            if (node == 0 || node->selectionState != currentSelectionState) {
                currentRect.setY(m_position.y() + m_currentLine.y());
                currentRect.setHeight(m_currentLine.height());

                if (currentSelectionState == Selected)
                    m_selectionRects.append(currentRect);

                if (currentClipNode != 0) {
                    if (!currentClipNodeUsed) {
                        delete currentClipNode;
                    } else {
                        currentClipNode->setIsRectangular(true);
                        currentClipNode->setRect(currentRect);
                        currentClipNode->update();
                    }
                }

                if (node != 0 && m_hasSelection)
                    currentClipNode = new QQuickDefaultClipNode(QRectF());
                else
                    currentClipNode = 0;
                currentClipNodeUsed = false;
//.........这里部分代码省略.........