nexmon – Rev 1
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/* related_packet_delegate.cpp
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "related_packet_delegate.h"
#include "packet_list_record.h"
#include "color_utils.h"
#include <QApplication>
#include <QPainter>
// To do:
// - Add other frame types and symbols. If `tshark -G fields | grep FT_FRAMENUM`
// is any indication, we should add "reassembly" and "reassembly error"
// fields.
// - Don't add *too* many frame types and symbols. The goal is context, not
// clutter.
// - Add tooltips. It looks like this needs to be done in ::helpEvent
// or PacketListModel::data.
// - Add "Go -> Next Related" and "Go -> Previous Related"?
// - Apply as filter?
RelatedPacketDelegate::RelatedPacketDelegate(QWidget *parent) :
QStyledItemDelegate(parent),
conv_(NULL),
current_frame_(0)
{
clear();
}
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),
QPoint(0, height / 2),
QPoint(0, 0)
};
painter->drawPolyline(end_line, 3);
}
}
// Related packet indicator. Rightward arrow for requests, leftward
// arrow for responses, circle for others.
// XXX These are comically oversized when we have multi-line rows.
if (related_frames_.contains(fd->num)) {
painter->setBrush(fg);
switch (related_frames_[fd->num]) {
// Request and response arrows are moved forward one pixel in order to
// maximize white space between the heads and the conversation line.
case FT_FRAMENUM_REQUEST:
{
int hh = height / 2;
QPoint tail(2 - en_w, hh);
QPoint head(en_w, hh);
drawArrow(painter, tail, head, hh / 2);
break;
}
case FT_FRAMENUM_RESPONSE:
{
int hh = height / 2;
QPoint tail(en_w - 1, hh);
QPoint head(1 - en_w, hh);
drawArrow(painter, tail, head, hh / 2);
break;
}
case FT_FRAMENUM_ACK:
{
QRect bbox (2 - en_w, height / 3, em_w - 2, height / 2);
drawCheckMark(painter, bbox);
break;
}
case FT_FRAMENUM_DUP_ACK:
{
QRect bbox (2 - en_w, (height / 3) - (line_w * 2), em_w - 2, height / 2);
drawCheckMark(painter, bbox);
bbox.moveTop(bbox.top() + (line_w * 3));
drawCheckMark(painter, bbox);
break;
}
case FT_FRAMENUM_NONE:
default:
painter->drawEllipse(QPointF(0.0, option_vi.rect.height() / 2), 2, 2);
}
}
painter->restore();
}
QSize RelatedPacketDelegate::sizeHint(const QStyleOptionViewItem &option,
const QModelIndex &index) const {
return QSize(option.fontMetrics.height() + QStyledItemDelegate::sizeHint(option, index).width(),
QStyledItemDelegate::sizeHint(option, index).height());
}
void RelatedPacketDelegate::drawArrow(QPainter *painter, const QPoint tail, const QPoint head, int head_size) const
{
int x_mul = head.x() > tail.x() ? -1 : 1;
QPoint head_points[] = {
head,
QPoint(head.x() + (head_size * x_mul), head.y() + (head_size / 2)),
QPoint(head.x() + (head_size * x_mul), head.y() - (head_size / 2)),
};
painter->drawLine(tail.x(), tail.y(), head.x() + (head_size * x_mul), head.y());
painter->drawPolygon(head_points, 3);
}
void RelatedPacketDelegate::drawCheckMark(QPainter *painter, const QRect bbox) const
{
QPoint cm_points[] = {
QPoint(bbox.x(), bbox.y() + (bbox.height() / 2)),
QPoint(bbox.x() + (bbox.width() / 4), bbox.y() + (bbox.height() * 3 / 4)),
bbox.topRight()
};
painter->drawPolyline(cm_points, 3);
}
void RelatedPacketDelegate::clear()
{
related_frames_.clear();
current_frame_ = 0;
conv_ = NULL;
}
void RelatedPacketDelegate::addRelatedFrame(int frame_num, ft_framenum_type_t framenum_type)
{
related_frames_[frame_num] = framenum_type;
// Last match wins. Last match might not make sense, however.
if (current_frame_ > 0) {
switch (framenum_type) {
case FT_FRAMENUM_REQUEST:
related_frames_[current_frame_] = FT_FRAMENUM_RESPONSE;
break;
case FT_FRAMENUM_RESPONSE:
related_frames_[current_frame_] = FT_FRAMENUM_REQUEST;
break;
default:
break;
}
}
}
void RelatedPacketDelegate::setConversation(conversation *conv)
{
conv_ = conv;
}
/*
* Editor modelines
*
* Local Variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/