C++ QTextFrame类代码示例

    QwtRichTextDocument( const QString &text, int flags, const QFont &font )
    {
        setUndoRedoEnabled( false );
        setDefaultFont( font );
        setHtml( text );

        // make sure we have a document layout
        ( void )documentLayout();

        QTextOption option = defaultTextOption();
        if ( flags & Qt::TextWordWrap )
            option.setWrapMode( QTextOption::WordWrap );
        else
            option.setWrapMode( QTextOption::NoWrap );

        option.setAlignment( ( Qt::Alignment ) flags );
        setDefaultTextOption( option );

        QTextFrame *root = rootFrame();
        QTextFrameFormat fm = root->frameFormat();
        fm.setBorder( 0 );
        fm.setMargin( 0 );
        fm.setPadding( 0 );
        fm.setBottomMargin( 0 );
        fm.setLeftMargin( 0 );
        root->setFrameFormat( fm );

        adjustSize();
    }

TextLayer::TextLayer(const int layer_id , QGraphicsItem *parent , QGraphicsScene *scene )
    : QGraphicsItem(parent,scene),evesum(0),modus(Show),border(1.),currentprintrender(false),
    hi(Metric("30px")),wi(Metric("110px")),bgcolor(QColor(Qt::white)),SwapLockBreak(false),
    bordercolor(QColor(Qt::red)),Rotate(0),check_view_area_time(0),ActionHover(false),
    format(DIV_ABSOLUTE),mount(new TextController)
{
    mount->q = this;
    setAcceptsHoverEvents(true);
    wisub_border = wi + border;
    history.clear();
    id = layer_id;
    setAcceptDrops(true);
    setFlag(QGraphicsItem::ItemIsSelectable,true);
    setFlag(QGraphicsItem::ItemIsFocusable,true);
    setFlag(QGraphicsItem::ItemIsMovable,false);
    setSelected(false);
    _doc = new QTextDocument();  
    _doc->setHtml(tr("<p>Write your text<p>"));
        QTextFrame  *Tframe = _doc->rootFrame();
        QTextFrameFormat rootformats = Tframe->frameFormat();
        rootformats.setWidth(wi);
        rootformats.setBorder(0);
        Tframe->setFrameFormat(rootformats);
        _doc->setPageSize(QSizeF(wi,hi)); 
        DLayout = _doc->documentLayout();
    setDocument(_doc);
    mount->txtControl()->document()->toHtml().size();  /* connect all */
    setZValue(1.99999);
    RestoreMoveAction();
    init();
}

void QTextFramePrivate::remove_me()
{
    Q_Q(QTextFrame);
    if (fragment_start == 0 && fragment_end == 0
        && !parentFrame) {
        q->document()->docHandle()->deleteObject(q);
        return;
    }

    if (!parentFrame)
        return;

    int index = parentFrame->d_func()->childFrames.indexOf(q);

    // iterator over all children and move them to the parent
    for (int i = 0; i < childFrames.size(); ++i) {
        QTextFrame *c = childFrames.at(i);
        parentFrame->d_func()->childFrames.insert(index, c);
        c->d_func()->parentFrame = parentFrame;
        ++index;
    }
    Q_ASSERT(parentFrame->d_func()->childFrames.at(index) == q);
    parentFrame->d_func()->childFrames.removeAt(index);

    childFrames.clear();
    parentFrame = 0;
}

void QTextDocumentPrivate::insert_string(int pos, uint strPos, uint length, int format, QTextUndoCommand::Operation op)
{
    // ##### optimise when only appending to the fragment!
    Q_ASSERT(noBlockInString(text.mid(strPos, length)));

    split(pos);
    uint x = fragments.insert_single(pos, length);
    QTextFragmentData *X = fragments.fragment(x);
    X->format = format;
    X->stringPosition = strPos;
    uint w = fragments.previous(x);
    if (w)
        unite(w);

    int b = blocks.findNode(pos);
    blocks.setSize(b, blocks.size(b)+length);

    Q_ASSERT(blocks.length() == fragments.length());

    QTextFrame *frame = qobject_cast<QTextFrame *>(objectForFormat(format));
    if (frame) {
        frame->d_func()->fragmentAdded(text.at(strPos), x);
        framesDirty = true;
    }

    adjustDocumentChangesAndCursors(pos, length, op);
}

void WymsingTxt::UpdateVars()  {

    BorderDicks = MarginSize->value();
    InitValue.setWidth( BoxLarghezza->value() );
    InitValue.setHeight ( BoxAltezza->value() );
    BGColor.setAlpha ( AlphaColor );
    rootformat.setBottomMargin ( psud->value() );
    rootformat.setLeftMargin ( pwest->value() );
    rootformat.setRightMargin ( post->value() );
    rootformat.setTopMargin ( pnord->value() );
    rootformat.setBackground ( BGColor ); 
    tdoc = wtxt->document()->clone();
    QTextFrame  *TfNewFo = tdoc->rootFrame();
    TfNewFo->setFrameFormat ( rootformat );
    DocFrameFormings = rootformat;
    wtxt->setDocument ( tdoc );
    wtxt->document()->setUseDesignMetrics (true );
    destimage->setDocument ( tdoc );
    destimage->setPos ( QPointF(XXset->value(),YYset->value()) );
    emit RetocValues(InitValue,BorderDicks,BGColor,MarginColor,tdoc,wtxt->GetListBlock());
    DocFrameFormings.setWidth( BoxLarghezza->value() );
    wtxt->document()->rootFrame()->setFrameFormat ( DocFrameFormings ); 
        

}

/*! Append a new message to the current session and scroll to the end of the message protocol and
    returns true if the action was successful. The \a messageColor defines the color of the message
    box and should be provided as a full-color (no dimming required) color, as it is automatically
    adjusted for the border and background.
*/
bool QwcPrivateMessager::appendMessageToCurrentSession(QTextDocument *document, const QString message, const QColor messageColor)
{
    if (!document) { return false; }

    QTextCursor cursor = document->rootFrame()->lastCursorPosition();
    cursor.movePosition(QTextCursor::StartOfBlock);

    QTextFrameFormat frameFormat;
    frameFormat.setPadding(4);
    frameFormat.setBackground(messageColor.lighter(190));
    frameFormat.setMargin(0);
    frameFormat.setBorder(2);
    frameFormat.setBorderBrush(messageColor.lighter(150));
    frameFormat.setBorderStyle(QTextFrameFormat::BorderStyle_Outset);

    // Title
    QTextCharFormat backupCharFormat = cursor.charFormat();

    QTextCharFormat newCharFormat;
    newCharFormat.setFontPointSize(9);

    QTextBlockFormat headerFormat;
    headerFormat.setAlignment(Qt::AlignHCenter);
    cursor.insertBlock(headerFormat);
    cursor.setCharFormat(newCharFormat);
    cursor.insertText(QDateTime::currentDateTime().toString());

    QTextFrame *frame = cursor.insertFrame(frameFormat);
    cursor.setCharFormat(backupCharFormat);
    frame->firstCursorPosition().insertText(message);

    return true;
}

int TextDocumentStructureModel::rowCount(const QModelIndex &index) const
{
    kDebug(32500) << "-------------------------- index:"<<index<<m_textDocument;
    if (! m_textDocument) {
        return 0;
    }

    if (! index.isValid()) {
        // one root frame
        return 1;
    }

    Q_ASSERT(index.internalId() < uint(m_nodeDataTable.count()));

    const NodeData &nodeData = m_nodeDataTable.at(index.internalId());

    if (nodeData.type == NodeData::Frame) {
        QTextFrame* frame = nodeData.frame;

        // count frames and blocks
        int count = 0;
        for (QTextFrame::iterator iterator = frame->begin(); !iterator.atEnd(); ++iterator) {
            ++count;
        }
        return count;
    }

    // should be a block then, no childs for now
    return 0;
}

ClientTextEdit::ClientTextEdit(QWidget* parent) : QTextEdit(parent) {
    setReadOnly(true);
    setOverwriteMode(true);
    setUndoRedoEnabled(false);
    setDocumentTitle("mClient");
    setTextInteractionFlags(Qt::TextSelectableByMouse | Qt::LinksAccessibleByMouse);
    setTabChangesFocus(false);

    //_doc->setMaximumBlockCount(Config().scrollbackSize); // max number of lines?
    document()->setUndoRedoEnabled(false);
    QTextFrame* frame = document()->rootFrame();
    _cursor = frame->firstCursorPosition();

    // Default Colors
    _foregroundColor = Qt::lightGray;
    _backgroundColor = Qt::black;
    _blackColor = Qt::darkGray;
    _redColor = Qt::darkRed;
    _greenColor = Qt::darkGreen;
    _yellowColor = Qt::darkYellow;
    _blueColor = Qt::darkBlue;
    _magentaColor = Qt::darkMagenta;
    _cyanColor = Qt::darkCyan;
    _grayColor = Qt::lightGray;
    _darkGrayColor = Qt::gray;
    _brightRedColor = Qt::red;
    _brightGreenColor = Qt::green;
    _brightYellowColor = Qt::yellow;
    _brightBlueColor = Qt::blue;
    _brightMagentaColor = Qt::magenta;
    _brightCyanColor = Qt::cyan;
    _whiteColor = Qt::white;
    // Default Fonts
    _serverOutputFont = QFont("Monospace", 10);
    _inputLineFont = QFont("Monospace", 10); //QApplication::font();
    _serverOutputFont.setStyleHint(QFont::TypeWriter, QFont::PreferAntialias);

    QTextFrameFormat frameFormat = frame->frameFormat();
    frameFormat.setBackground(_backgroundColor);
    frameFormat.setForeground(_foregroundColor);
    frame->setFrameFormat(frameFormat);

    _format = _cursor.charFormat();
    setDefaultFormat(_format);
    _defaultFormat = _format;
    _cursor.setCharFormat(_format);

    QFontMetrics fm(_serverOutputFont);
    setTabStopWidth(fm.width(" ") * 8); // A tab is 8 spaces wide
    QScrollBar* scrollbar = verticalScrollBar();
    scrollbar->setSingleStep(fm.leading()+fm.height());

    connect(scrollbar, SIGNAL(sliderReleased()), 
                this, SLOT(scrollBarReleased()));

    previous = 0;
}

int KTextDocumentLayout::hitTestIterated(QTextFrame::iterator begin, QTextFrame::iterator end, const QPointF &point, Qt::HitTestAccuracy accuracy) const
{
    int position = -1;
    QTextFrame::iterator it = begin;
    for (it = begin; it != end; ++it) {
        QTextBlock block = it.currentBlock();
        QTextTable *table = qobject_cast<QTextTable*>(it.currentFrame());
        QTextFrame *subFrame = it.currentFrame();

        if (table) {
            QTextTableCell cell = m_state->hitTestTable(table, point);
            if (cell.isValid()) {
                position = hitTestIterated(cell.begin(), cell.end(), point,
                                accuracy);
                if (position == -1)
                    position = cell.lastPosition();
                return position;
            }
            continue;
        } else if (subFrame) {
            position = hitTestIterated(subFrame->begin(), subFrame->end(), point, accuracy);
            if (position != -1)
                return position;
            continue;
        } else {
            if (!block.isValid())
                continue;
        }
        // kDebug(32500) <<"hitTest[" << point.x() <<"," << point.y() <<"]";
        QTextLayout *layout = block.layout();
        if (point.y() > layout->boundingRect().bottom()) {
            // just skip this block. position = block.position() + block.length() - 1;
            continue;
        }
        for (int i = 0; i < layout->lineCount(); i++) {
            QTextLine line = layout->lineAt(i);
            // kDebug(32500) <<" + line[" << line.textStart() <<"]:" << line.y() <<"-" << line.height();
            if (point.y() > line.y() + line.height()) {
                position = line.textStart() + line.textLength();
                continue;
            }
            if (accuracy == Qt::ExactHit && point.y() < line.y()) // between lines
                return -1;
            if (accuracy == Qt::ExactHit && // left or right of line
                    (point.x() < line.x() || point.x() > line.x() + line.width()))
                return -1;
            if (point.x() > line.width() && layout->textOption().textDirection() == Qt::RightToLeft) {
                // totally right of RTL text means the position is the start of the text.
                return block.position() + line.textStart();
            }
            return block.position() + line.xToCursor(point.x());
        }
    }
    return -1;
}

static QTextFrame *findChildFrame(QTextFrame *f, int pos)
{
    // ##### use binary search
    QList<QTextFrame *> children = f->childFrames();
    for (int i = 0; i < children.size(); ++i) {
        QTextFrame *c = children.at(i);
        if (pos >= c->firstPosition() && pos <= c->lastPosition())
            return c;
    }
    return 0;
}

void MainWindow::selectFrame()
{
    QTextCursor cursor = editor->textCursor();
    QTextFrame *frame = cursor.currentFrame();

    cursor.beginEditBlock();
    cursor.setPosition(frame->firstPosition());
    cursor.setPosition(frame->lastPosition(), QTextCursor::KeepAnchor);
    cursor.endEditBlock();

    editor->setTextCursor(cursor);
}

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    // 获取文档对象
    QTextDocument *document = ui->textEdit->document();

    // 获取根框架
    QTextFrame *rootFrame = document->rootFrame();

    // 创建框架格式
    QTextFrameFormat format;
    // 边界颜色
    format.setBorderBrush(Qt::red);
    // 边界宽度
    format.setBorder(3);
    // 框架使用格式
    rootFrame->setFrameFormat(format);

    QTextFrameFormat frameFormat;
    // 设置背景颜色
    frameFormat.setBackground(Qt::lightGray);
    // 设置边距
    frameFormat.setMargin(10);
    // 设置填衬
    frameFormat.setPadding(5);
    frameFormat.setBorder(2);
    frameFormat.setBorderStyle(QTextFrameFormat::BorderStyle_Dotted); //设置边框样式

    // 获取光标
    QTextCursor cursor = ui->textEdit->textCursor();
    // 在光标处插入框架
    cursor.insertFrame(frameFormat);

   //以下是5.2.2节内容
    QAction *action_textFrame = new QAction(tr("框架"),this);
    connect(action_textFrame,SIGNAL(triggered()),this,SLOT(showTextFrame()));
    // 在工具栏添加动作
    ui->mainToolBar->addAction(action_textFrame);

    QAction *action_textBlock = new QAction(tr("文本块"),this);
    connect(action_textBlock,SIGNAL(triggered()),this,SLOT(showTextBlock()));
    ui->mainToolBar->addAction(action_textBlock);

    QAction *action_font = new QAction(tr("字体"),this);
    // 设置动作可以被选中
    action_font->setCheckable(true);
    connect(action_font,SIGNAL(toggled(bool)),this,SLOT(setTextFont(bool)));
    ui->mainToolBar->addAction(action_font);
}

void QSGTextNode::addTextDocument(const QPointF &position, QTextDocument *textDocument, const QColor &color,
                                  QSGText::TextStyle style, const QColor &styleColor)
{
    Q_UNUSED(position)
    QTextFrame *textFrame = textDocument->rootFrame();
    QPointF p = textDocument->documentLayout()->frameBoundingRect(textFrame).topLeft();

    QTextFrame::iterator it = textFrame->begin();
    while (!it.atEnd()) {
        addTextBlock(p, textDocument, it.currentBlock(), color, style, styleColor);
        ++it;
    }
}

void KDReports::Frame::build( ReportBuilder& builder ) const
{
    // prepare the frame
    QTextFrameFormat format;
    if ( d->m_width ) {
        if ( d->m_widthUnit == Millimeters ) {
            format.setWidth( QTextLength( QTextLength::FixedLength, mmToPixels( d->m_width ) ) );
        } else {
            format.setWidth( QTextLength( QTextLength::PercentageLength, d->m_width ) );
        }
    }
    if ( d->m_height ) {
        if ( d->m_heightUnit == Millimeters ) {
            format.setHeight( QTextLength( QTextLength::FixedLength, mmToPixels( d->m_height ) ) );
        } else {
            format.setHeight( QTextLength( QTextLength::PercentageLength, d->m_height ) );
        }
    }

    format.setPadding( mmToPixels( padding() ) );
    format.setBorder( d->m_border );
    // TODO borderBrush like in AbstractTableElement
    format.setPosition( QTextFrameFormat::InFlow );

    QTextCursor& textDocCursor = builder.cursor();

    QTextFrame *frame = textDocCursor.insertFrame(format);

    QTextCursor contentsCursor = frame->firstCursorPosition();

    ReportBuilder contentsBuilder( builder.currentDocumentData(),
                                   contentsCursor, builder.report() );
    contentsBuilder.copyStateFrom( builder );

    foreach( const KDReports::ElementData& ed, d->m_elements )
    {
        switch ( ed.m_type ) {
        case KDReports::ElementData::Inline:
            contentsBuilder.addInlineElement( *ed.m_element );
            break;
        case KDReports::ElementData::Block:
            contentsBuilder.addBlockElement( *ed.m_element, ed.m_align );
            break;
        case KDReports::ElementData::Variable:
            contentsBuilder.addVariable( ed.m_variableType );
            break;
        }
    }

    textDocCursor.movePosition( QTextCursor::End );
}

void KoSectionStyle::unapplyStyle(QTextFrame &section) const
{
    if (d->parentStyle)
        d->parentStyle->unapplyStyle(section);

    QTextFrameFormat format = section.frameFormat();

    QList<int> keys = d->stylesPrivate.keys();
    for (int i = 0; i < keys.count(); i++) {
        QVariant variant = d->stylesPrivate.value(keys[i]);
        if (variant == format.property(keys[i]))
            format.clearProperty(keys[i]);
    }
    section.setFrameFormat(format);
}