C++ PacketListRecord::conversation方法代码示例

void RelatedPacketDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
                              const QModelIndex &index) const
{
#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
    QStyleOptionViewItemV4 option_vi = option;
#else
    QStyleOptionViewItem option_vi = option;
#endif
    QStyledItemDelegate::initStyleOption(&option_vi, index);
    int em_w = option_vi.fontMetrics.height();
    int en_w = (em_w + 1) / 2;
    int line_w = (option_vi.fontMetrics.lineWidth());

#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
    option_vi.features |= QStyleOptionViewItemV4::HasDecoration;
#else
    option_vi.features |= QStyleOptionViewItem::HasDecoration;
#endif
    option_vi.decorationSize.setHeight(1);
    option_vi.decorationSize.setWidth(em_w);
    QStyledItemDelegate::paint(painter, option_vi, index);

    guint32 setup_frame = 0, last_frame = 0;
    if (conv_) {
        setup_frame = (int) conv_->setup_frame;
        last_frame = (int) conv_->last_frame;
    }

    const frame_data *fd;
    PacketListRecord *record = static_cast<PacketListRecord*>(index.internalPointer());
    if (!record || (fd = record->frameData()) == NULL) {
        return;
    }

    painter->save();

    if (QApplication::style()->objectName().contains("vista")) {
        // QWindowsVistaStyle::drawControl does this internally. Unfortunately there
        // doesn't appear to be a more general way to do this.
        option_vi.palette.setColor(QPalette::All, QPalette::HighlightedText, option_vi.palette.color(QPalette::Active, QPalette::Text));
    }

    QPalette::ColorGroup cg = option_vi.state & QStyle::State_Enabled
                              ? QPalette::Normal : QPalette::Disabled;
    QColor fg;
    if (cg == QPalette::Normal && !(option_vi.state & QStyle::State_Active))
        cg = QPalette::Inactive;
    if (option_vi.state & QStyle::State_Selected) {
        fg = option_vi.palette.color(cg, QPalette::HighlightedText);
    } else {
        fg = option_vi.palette.color(cg, QPalette::Text);
    }

    fg = ColorUtils::alphaBlend(fg, option_vi.palette.color(cg, QPalette::Base), 0.5);
    QPen line_pen(fg);
    line_pen.setWidth(line_w);
    line_pen.setJoinStyle(Qt::RoundJoin);

    painter->setPen(line_pen);
    painter->translate(option_vi.rect.x(), option_vi.rect.y());
    painter->translate(en_w + 0.5, 0.5);
    painter->setRenderHint(QPainter::Antialiasing, true);
    int height = option_vi.rect.height();

    // Uncomment to make the boundary visible.
//    painter->save();
//    painter->setPen(Qt::darkRed);
//    painter->drawRect(QRectF(0.5, 0.5, en_w - 1, height - 1));
//    painter->restore();

    // The current decorations are based on what looked good and were easy
    // to code.

    // It might be useful to have a JACKPOT_MODE define that shows each
    // decoration in sequence in order to make it easier to create
    // screenshots for the User's Guide.

    // Vertical line. Lower and upper half for the start and end of the
    // conversation respectively, solid for conversation member, dashed
    // for other packets in the start-end range.
    if (setup_frame > 0 && last_frame > 0 && setup_frame != last_frame) {
        if (fd->num == setup_frame) {
            QPoint start_line[] = {
                QPoint(en_w - 1, height / 2),
                QPoint(0, height / 2),
                QPoint(0, height)
            };
            painter->drawPolyline(start_line, 3);
        } else if (fd->num > setup_frame && fd->num < last_frame) {
            painter->save();
            if (conv_ != record->conversation()) {
                QPen other_pen(line_pen);
                other_pen.setStyle(Qt::DashLine);
                painter->setPen(other_pen);
            }
            painter->drawLine(0, 0, 0, height);
            painter->restore();
        } else if (fd->num == last_frame) {
            QPoint end_line[] = {
                QPoint(en_w - 1, height / 2),
//.........这里部分代码省略.........