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//
// C++ Implementation: LaylinesGraphicsItem
//
// Description:
//
//
// Author: Thibaut GRIDEL <tgridel@free.fr>
//
// Copyright (c) 2011 Thibaut GRIDEL
//
// 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 3 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, see <http://www.gnu.org/licenses/>.
//
//
#include <iostream>
#include <QPainter>
#include <QGraphicsScene>
#include "laylines.h"
#include "commontypes.h"
#include "situationmodel.h"
extern int debugLevel;
LaylinesGraphicsItem::LaylinesGraphicsItem(PositionModel *model, QGraphicsItem *parent)
: QGraphicsPathItem(parent),
m_model(model),
m_length(model->situation()->situationLength()),
m_boatLength(model->situation()->sizeForSeries(model->situation()->situationSeries())),
m_laylineAngle(model->situation()->laylineAngle()) {
setFlag(QGraphicsItem::ItemIgnoresTransformations);
setFlag(QGraphicsItem::ItemStacksBehindParent);
setPen(Qt::DashLine);
updatePath();
setVisible(m_model->laylines());
setWind(model->wind());
connect(m_model, SIGNAL(laylinesChanged(bool)),
this, SLOT(setVisible(bool)));
connect(m_model, SIGNAL(windChanged(qreal)),
this, SLOT(setWind(qreal)));
connect(m_model->situation(), SIGNAL(lengthChanged(int)),
this, SLOT(setLength(int)));
connect(m_model->situation(), SIGNAL(laylineChanged(int)),
this, SLOT(setLaylineAngle(int)));
connect(m_model->situation(), SIGNAL(seriesChanged(int)),
this, SLOT(setSeries(int)));
}
LaylinesGraphicsItem::~LaylinesGraphicsItem() {}
void LaylinesGraphicsItem::setLength(int value) {
if (m_length != value) {
prepareGeometryChange();
m_length = value;
updatePath();
}
}
void LaylinesGraphicsItem::setSeries(int value) {
int boatLength = m_model->situation()->sizeForSeries((Boats::Series)value);
if (m_boatLength != boatLength) {
m_boatLength = boatLength;
updatePath();
}
}
void LaylinesGraphicsItem::setLaylineAngle(int value) {
if (m_laylineAngle != value) {
m_laylineAngle = value;
updatePath();
}
}
void LaylinesGraphicsItem::setWind(qreal value) {
if(m_wind != value) {
m_wind = value;
QTransform transform;
transform.rotate(m_wind);
setTransform(transform, false);
}
}
void LaylinesGraphicsItem::setVisible(bool visible) {
QGraphicsItem::setVisible(visible);
// hack for performance issues. It seems an invisible path costs much
if(m_visible != visible) {
m_visible = visible;
updatePath();
}
}
void LaylinesGraphicsItem::updatePath() {
QPainterPath path;
int r = 1.25 * m_length * m_boatLength;
qreal theta = m_laylineAngle * M_PI /180;
if(m_visible) {
path.lineTo(r*sin(theta), r*cos(theta)); // starboard layline
path.moveTo(0, 0);
path.lineTo(-r*sin(theta), r*cos(theta)); // port layline
}
setPath(path);
}
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