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flightgear/src/GUI/NavaidDiagram.cxx
2018-07-19 09:58:44 +01:00

141 lines
3.5 KiB
C++

// NavaidDiagram.cxx - part of GUI launcher using Qt5
//
// Written by James Turner, started October 2015.
//
// Copyright (C) 2014 James Turner <zakalawe@mac.com>
//
// 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 "NavaidDiagram.hxx"
#include <limits>
#include <QPainter>
#include <QDebug>
#include <QVector2D>
#include <QMouseEvent>
#include <Navaids/NavDataCache.hxx>
NavaidDiagram::NavaidDiagram(QQuickItem* pr) :
BaseDiagram(pr)
{
}
void NavaidDiagram::setNavaid(qlonglong nav)
{
m_navaid = fgpositioned_cast<FGNavRecord>(flightgear::NavDataCache::instance()->loadById(nav));
m_projectionCenter = m_navaid ? m_navaid->geod() : SGGeod();
m_geod = m_projectionCenter;
recomputeBounds(true);
emit locationChanged();
}
qlonglong NavaidDiagram::navaid() const
{
return m_navaid->guid();
}
void NavaidDiagram::setGeod(QmlGeod geod)
{
setGeod(geod.geod());
}
QmlGeod NavaidDiagram::geod() const
{
return QmlGeod(m_geod);
}
void NavaidDiagram::setGeod(const SGGeod &geod)
{
m_navaid.clear();
m_geod = geod;
m_projectionCenter = m_geod;
recomputeBounds(true);
emit locationChanged();
}
void NavaidDiagram::setOffsetEnabled(bool offset)
{
if (m_offsetEnabled == offset)
return;
m_offsetEnabled = offset;
recomputeBounds(true);
emit offsetChanged();
}
void NavaidDiagram::setOffsetDistance(QuantityValue distanceNm)
{
if (distanceNm == m_offsetDistance)
return;
m_offsetDistance = distanceNm;
update();
emit offsetChanged();
}
void NavaidDiagram::setOffsetBearing(QuantityValue bearing)
{
m_offsetBearing = bearing;
update();
emit offsetChanged();
}
void NavaidDiagram::setHeading(QuantityValue headingDeg)
{
m_heading = headingDeg;
update();
emit offsetChanged();
}
void NavaidDiagram::paintContents(QPainter *painter)
{
QPointF base = project(m_geod);
SGGeod aircraftPos = m_geod;
if (m_offsetEnabled) {
double d = m_offsetDistance.convertToUnit(Units::Kilometers).value * 1000;
SGGeod offsetGeod = SGGeodesy::direct(m_geod, m_offsetBearing.value, d);
QPointF offset = project(offsetGeod);
QPen pen(Qt::green);
pen.setCosmetic(true);
painter->setPen(pen);
painter->drawLine(base, offset);
aircraftPos = offsetGeod;
}
paintAirplaneIcon(painter, aircraftPos, m_heading.value);
}
void NavaidDiagram::doComputeBounds()
{
extendBounds(project(m_geod));
// project four points around the base location at 20nm to give some
// coverage
for (int i=0; i<4; ++i) {
SGGeod pt = SGGeodesy::direct(m_geod, i * 90, SG_NM_TO_METER * 20.0);
extendBounds(project(pt));
}
if (m_offsetEnabled) {
double d = m_offsetDistance.convertToUnit(Units::Kilometers).value * 1000;
SGGeod offsetPos = SGGeodesy::direct(m_geod, m_offsetBearing.value, d);
extendBounds(project(offsetPos));
}
}