C++ QTextFrame::lastPosition方法代码示例

void QTextDocumentPrivate::insert_frame(QTextFrame *f)
{
    int start = f->firstPosition();
    int end = f->lastPosition();
    QTextFrame *parent = frameAt(start-1);
    Q_ASSERT(parent == frameAt(end+1));

    if (start != end) {
        // iterator over the parent and move all children contained in my frame to myself
        for (int i = 0; i < parent->d_func()->childFrames.size(); ++i) {
            QTextFrame *c = parent->d_func()->childFrames.at(i);
            if (start < c->firstPosition() && end > c->lastPosition()) {
                parent->d_func()->childFrames.removeAt(i);
                f->d_func()->childFrames.append(c);
                c->d_func()->parentFrame = f;
            }
        }
    }
    // insert at the correct position
    int i = 0;
    for (; i < parent->d_func()->childFrames.size(); ++i) {
        QTextFrame *c = parent->d_func()->childFrames.at(i);
        if (c->firstPosition() > end)
            break;
    }
    parent->d_func()->childFrames.insert(i, f);
    f->d_func()->parentFrame = parent;
}

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);
}

void QQuickTextNode::addTextDocument(const QPointF &position, QTextDocument *textDocument,
                                  const QColor &textColor,
                                  QQuickText::TextStyle style, const QColor &styleColor,
                                  const QColor &anchorColor,
                                  const QColor &selectionColor, const QColor &selectedTextColor,
                                  int selectionStart, int selectionEnd)
{
    QQuickTextNodeEngine engine;
    engine.setTextColor(textColor);
    engine.setSelectedTextColor(selectedTextColor);
    engine.setSelectionColor(selectionColor);
    engine.setAnchorColor(anchorColor);
    engine.setPosition(position);

    QList<QTextFrame *> frames;
    frames.append(textDocument->rootFrame());
    while (!frames.isEmpty()) {
        QTextFrame *textFrame = frames.takeFirst();
        frames.append(textFrame->childFrames());

        engine.addFrameDecorations(textDocument, textFrame);

        if (textFrame->firstPosition() > textFrame->lastPosition()
         && textFrame->frameFormat().position() != QTextFrameFormat::InFlow) {
            const int pos = textFrame->firstPosition() - 1;
            ProtectedLayoutAccessor *a = static_cast<ProtectedLayoutAccessor *>(textDocument->documentLayout());
            QTextCharFormat format = a->formatAccessor(pos);
            QRectF rect = a->frameBoundingRect(textFrame);

            QTextBlock block = textFrame->firstCursorPosition().block();
            engine.setCurrentLine(block.layout()->lineForTextPosition(pos - block.position()));
            engine.addTextObject(rect.topLeft(), format, QQuickTextNodeEngine::Unselected, textDocument,
                                 pos, textFrame->frameFormat().position());
        } else {
            QTextFrame::iterator it = textFrame->begin();

            while (!it.atEnd()) {
                Q_ASSERT(!engine.currentLine().isValid());

                QTextBlock block = it.currentBlock();
                engine.addTextBlock(textDocument, block, position, textColor, anchorColor, selectionStart, selectionEnd);
                ++it;
            }
        }
    }

    engine.addToSceneGraph(this, style, styleColor);
}

//! [2]
void MainWindow::newLetter()
{
    textEdit->clear();

    QTextCursor cursor(textEdit->textCursor());
    cursor.movePosition(QTextCursor::Start);
    QTextFrame *topFrame = cursor.currentFrame();
    QTextFrameFormat topFrameFormat = topFrame->frameFormat();
    topFrameFormat.setPadding(16);
    topFrame->setFrameFormat(topFrameFormat);

    QTextCharFormat textFormat;
    QTextCharFormat boldFormat;
    boldFormat.setFontWeight(QFont::Bold);
    QTextCharFormat italicFormat;
    italicFormat.setFontItalic(true);

    QTextTableFormat tableFormat;
    tableFormat.setBorder(1);
    tableFormat.setCellPadding(16);
    tableFormat.setAlignment(Qt::AlignRight);
    cursor.insertTable(1, 1, tableFormat);
    cursor.insertText("The Firm", boldFormat);
    cursor.insertBlock();
    cursor.insertText("321 City Street", textFormat);
    cursor.insertBlock();
    cursor.insertText("Industry Park");
    cursor.insertBlock();
    cursor.insertText("Some Country");
    cursor.setPosition(topFrame->lastPosition());
    cursor.insertText(QDate::currentDate().toString("d MMMM yyyy"), textFormat);
    cursor.insertBlock();
    cursor.insertBlock();
    cursor.insertText("Dear ", textFormat);
    cursor.insertText("NAME", italicFormat);
    cursor.insertText(",", textFormat);
    for (int i = 0; i < 3; ++i)
        cursor.insertBlock();
    cursor.insertText(tr("Yours sincerely,"), textFormat);
    for (int i = 0; i < 3; ++i)
        cursor.insertBlock();
    cursor.insertText("The Boss", textFormat);
    cursor.insertBlock();
    cursor.insertText("ADDRESS", italicFormat);
}

void MainWindow::newLetter(){
    chatbox->clear();


    QTextCursor cursor(chatbox->textCursor());
    cursor.movePosition(QTextCursor::Start);
    QTextFrame *topFrame = cursor.currentFrame();
    QTextFrameFormat topFrameFormat = topFrame->frameFormat();
    topFrameFormat.setPadding(16);
    topFrame->setFrameFormat(topFrameFormat);

    QTextCharFormat textFormat;
    QTextCharFormat boldFormat;
    boldFormat.setFontWeight(QFont::Bold);
    QTextCharFormat italicFormat;
    italicFormat.setFontItalic(true);

    /*QTextTableFormat tableFormat;
    tableFormat.setBorder(1);
    tableFormat.setCellPadding(16);
    tableFormat.setAlignment(Qt::AlignRight);
    cursor.insertTable(1, 1, tableFormat);
    cursor.insertText("The Firm", boldFormat);
    cursor.insertBlock();
    cursor.insertText("321 City Street", textFormat);
    cursor.insertBlock();
    cursor.insertText("Industry Park");
    cursor.insertBlock();
    cursor.insertText("Some Country"); */
    cursor.setPosition(topFrame->lastPosition());
    cursor.insertText("Railguy: ", boldFormat);
    cursor.insertText("lol nub", textFormat);
    cursor.insertBlock();
    cursor.insertText("Chaos: ", boldFormat);
    cursor.insertText("nou", textFormat);
    cursor.insertBlock();

    QFont font = chattitle->font();
    font.setBold(true);
    chattitle->setFont(font);
    chattitle->setText("#General");
}

void QTextDocumentPrivate::changeObjectFormat(QTextObject *obj, int format)
{
    beginEditBlock();
    int objectIndex = obj->objectIndex();
    int oldFormatIndex = formats.objectFormatIndex(objectIndex);
    formats.setObjectFormatIndex(objectIndex, format);

    QTextBlockGroup *b = qobject_cast<QTextBlockGroup *>(obj);
    if (b) {
        b->d_func()->markBlocksDirty();
    }
    QTextFrame *f = qobject_cast<QTextFrame *>(obj);
    if (f)
        documentChange(f->firstPosition(), f->lastPosition() - f->firstPosition());

    QTextUndoCommand c = { QTextUndoCommand::GroupFormatChange, true, QTextUndoCommand::MoveCursor, oldFormatIndex,
                           0, 0, { obj->d_func()->objectIndex }, 0 };
    appendUndoItem(c);

    endEditBlock();
}

//.........这里部分代码省略.........
        m_cursor = table->cellAt(0, 2).firstCursorPosition();
        m_cursor.insertHtml("C<sub>i</sub> ");
        m_cursor = table->cellAt(0, 3).firstCursorPosition();
        m_cursor.insertText("B");

        for(size_t j=0; j < m_params->width(); j++)
        {
            m_cursor = table->cellAt(0, j+4).firstCursorPosition();
            m_cursor.insertHtml(QString("P<sub>%1</sub> ").arg(j+1));
            /* m_cursor.insertHtml(QString("C<sub>%1</sub> =").arg(j+1));
            if(m_params->variableType(j) == SimplexMethod::VariableArtificial)
                m_cursor.insertText("W");
            else
                m_cursor.insertText(formatDouble(m_params->rowC(j))); */

        }

        m_cursor = table->cellAt(0, m_params->width()+4).firstCursorPosition();
        m_cursor.insertText(QChar(0x0398)); // theta

        /*
            matrix, columnCompareOp, columnB, columnTheta
        */
        for(size_t i=0; i < m_params->height(); i++)
        {
            m_cursor = table->cellAt(i+1, 0).firstCursorPosition();
            m_cursor.insertText(QString("%1").arg(i+1));

            // basis
            m_cursor = table->cellAt(i+1, 1).firstCursorPosition();
            size_t basisColumn = m_params->columnBasis(i);
            m_cursor.insertHtml(QString("P<sub>%1</sub> ").arg(basisColumn+1));

            // basis C
            m_cursor = table->cellAt(i+1, 2).firstCursorPosition();
            if(m_params->variableType(basisColumn) == SimplexMethod::VariableArtificial)
                m_cursor.insertText("W");
            else
                m_cursor.insertText(formatDouble(m_params->rowC(basisColumn)));

            // B
            m_cursor = table->cellAt(i+1, 3).firstCursorPosition();
            m_cursor.insertText(formatDouble(m_params->columnB(i)));

            // matrix
            for(size_t j=0; j < m_params->width(); j++)
            {
                m_cursor = table->cellAt(i+1, j+4).firstCursorPosition();
                m_cursor.insertText(formatDouble(m_params->matrixA(i, j)));
            }

            // theta
            m_cursor = table->cellAt(i+1, m_params->width()+4).firstCursorPosition();
            if(m_params->columnTheta(i) > 0)
                 m_cursor.insertText(formatDouble(m_params->columnTheta(i)));
            else
                 m_cursor.insertText("-");
        }

        /*
            m+1 row
        */
        m_cursor = table->cellAt(m_params->height()+1, 0).firstCursorPosition();
        m_cursor.insertText("m+1");
        m_cursor = table->cellAt(m_params->height()+1, 3).firstCursorPosition();
        m_cursor.insertText(formatDouble(m_params->F()));

        for(size_t j=0; j < m_params->width(); j++)
        {
            m_cursor = table->cellAt(m_params->height()+1, j+4).firstCursorPosition();
            m_cursor.insertText(formatDouble(m_params->rowD(j)));
        }

        /*
            m+2 row (for artificial variables)
        */
        if(m_params->artificialFlag())
        {
            table->appendRows(1);

            m_cursor = table->cellAt(m_params->height()+2, 0).firstCursorPosition();
            m_cursor.insertText("m+2");

            m_cursor = table->cellAt(m_params->height()+2, 3).firstCursorPosition();
            m_cursor.insertText(formatDouble(m_params->WF()));

            for(size_t j=0; j < m_params->width(); j++)
            {
                m_cursor = table->cellAt(m_params->height()+2, j+4).firstCursorPosition();
                m_cursor.insertText(formatDouble(m_params->rowWD(j)));
            }
        }

        /*
            end of table
        */
        m_cursor.endEditBlock();
        m_cursor.setPosition(topFrame->lastPosition());
        return true;
    }