polarishourangle.cpp

/*
    SPDX-FileCopyrightText: 2015-2017 Pavel Mraz
 
    SPDX-FileCopyrightText: 2017 Jasem Mutlaq
 
    SPDX-License-Identifier: GPL-2.0-or-later
*/
 
#include "polarishourangle.h"
 
#include "skyobject.h"
#include "kstarsdata.h"
#include "skymapcomposite.h"
 
#include <QPainter>
#include <QPen>
 
float hbase = 24;
float vangle = 15;
 
PolarisHourAngle::PolarisHourAngle(QWidget *parent) :
  QDialog(parent),
  m_polarisHourAngle(0)
{
  setupUi(this);
  setFixedHeight(size().height());
 
  SkyObject *polaris = KStarsData::Instance()->skyComposite()->findByName(i18nc("star name", "Polaris"));
  Q_ASSERT_X(polaris != nullptr, "PolarisHourAngle", "Unable to find Polaris!");
  m_polaris = polaris->clone();
 
  m_reticle12.reset(new QPixmap(":/images/reticle12.png"));
  m_reticle24.reset(new QPixmap(":/images/reticle24.png"));
 
  connect(dateTimeEdit, SIGNAL(dateTimeChanged(QDateTime)), this, SLOT(onTimeUpdated(QDateTime)));
  connect(currentTimeB, &QPushButton::clicked, this, [this]() { dateTimeEdit->setDateTime(KStarsData::Instance()->lt()); });
  connect(twelveHourR, SIGNAL(toggled(bool)), this, SLOT(update()));
 
  dateTimeEdit->setDateTime(KStarsData::Instance()->lt());
}
 
void PolarisHourAngle::paintEvent(QPaintEvent *)
{
  QPainter p(this);
  QPointF center = frame->rect().center();
  double r1 = 175;
 
  p.setRenderHint(QPainter::Antialiasing);
  p.setRenderHint(QPainter::SmoothPixmapTransform);
 
  p.drawPixmap(frame->pos(), twelveHourR->isChecked() ? *(m_reticle12.get()) : *(m_reticle24.get()));
  p.setPen(Qt::yellow);
  p.setBrush(Qt::white);
  p.translate(frame->pos());
 
//  double angle = (24.0 - m_polarisHourAngle) * 15.0;
  double angle = (hbase - m_polarisHourAngle) * vangle;
  p.save();
 
  p.translate(center);
  p.rotate(angle);
 
  QPolygon poly;
 
  p.setPen(QPen(Qt::red, 1, Qt::SolidLine, Qt::SquareCap, Qt::MiterJoin));
  p.setBrush(p.pen().color());
 
  poly << QPoint(0, r1);
  poly << QPoint(10, -10);
  poly << QPoint(5, -14);
  poly << QPoint(-5, -14);
  poly << QPoint(-10, -10);
  poly << QPoint(0, r1);
 
  p.drawPolygon(poly);
 
  p.restore();
}
 
void PolarisHourAngle::onTimeUpdated(QDateTime newDateTime)
{
    KStarsDateTime lt(newDateTime);
    KSNumbers num(lt.djd());
    m_polaris->updateCoords(&num, false);
    dms lst = KStarsData::Instance()->geo()->GSTtoLST(lt.gst());
/*
    m_polarisHourAngle = (lst.Degrees() - m_polaris->ra().Degrees())/15.0;
    while (m_polarisHourAngle > 24)
        m_polarisHourAngle -= 24;
    while (m_polarisHourAngle < 0)
        m_polarisHourAngle += 24;
*/
    m_polarisHourAngle = (lst.Degrees() - m_polaris->ra().Degrees())/vangle;
    while (m_polarisHourAngle > hbase)
        m_polarisHourAngle -= hbase;
    while (m_polarisHourAngle < hbase)
        m_polarisHourAngle += hbase;
 
    labelPolarisHA->setText(dms(m_polarisHourAngle*vangle).toHMSString());
    labelDate->setText(newDateTime.date().toString());
    labelTime->setText(newDateTime.time().toString());
 
    update();
}