File indexing completed on 2025-04-27 09:56:22

 /*
     SPDX-FileCopyrightText: 2016 Artem Fedoskin <afedoskin3@gmail.com>
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 #include "skymaplite.h"
 #include "kstarsdata.h"
 #include "kstarslite.h"
 
 #include <QtMath>
 
 #include "kstarslite/skypointlite.h"
 #include "kstarslite/skyobjectlite.h"
 
 #include "kstarslite/skyitems/planetsitem.h"
 #include "Options.h"
 #include "projections/projector.h"
 #include "skymapcomposite.h"
 #include "ksutils.h"
 //#include <QTapSensor>
 
 void SkyMapLite::mousePressEvent(QMouseEvent *e)
 {
     if ((e->modifiers() & Qt::ControlModifier) && (e->button() == Qt::LeftButton))
     {
         ZoomRect.moveCenter(e->pos());
         setZoomMouseCursor();
         update(); //refresh without redrawing skymap
         return;
     }
     // if button is down and cursor is not moved set the move cursor after 500 ms
     QTimer::singleShot(500, this, SLOT(setMouseMoveCursor()));
 
     // break if point is unusable
     if (projector()->unusablePoint(e->pos()))
         return;
 
     if (!midMouseButtonDown && e->button() == Qt::MidButton)
     {
         y0                 = 0.5 * height() - e->y(); //record y pixel coordinate for middle-button zooming
         midMouseButtonDown = true;
     }
     if (!mouseButtonDown)
     {
         if (e->button() == Qt::LeftButton)
         {
             mouseButtonDown = true;
         }
 
         //determine RA, Dec of mouse pointer
         m_MousePoint = projector()->fromScreen(e->pos(), data->lst(), data->geo()->lat());
         setClickedPoint(&m_MousePoint);
 
         //Find object nearest to clickedPoint()
         double maxrad  = 1000.0 / Options::zoomFactor();
         SkyObject *obj = data->skyComposite()->objectNearest(clickedPoint(), maxrad);
         setClickedObject(obj);
         if (obj)
             setClickedPoint(obj);
 
         switch (e->button())
         {
             case Qt::LeftButton:
             {
                 /*QString name;
                 if( clickedObject() )
                     //name = clickedObject()->translatedLongName();
                 else
                     //name = i18n( "Empty sky" );
                 //kstars->statusBar()->changeItem(name, 0 );
                 //kstars->statusBar()->showMessage(name, 0 );
 
                 emit positionClicked(&m_MousePoint);*/
             }
 
             break;
             case Qt::RightButton:
                 /*if( rulerMode ) {
                     // Compute angular distance.
                     slotEndRulerMode();
                 } else {*/
                 // Show popup menu
                 if (clickedObject())
                 {
                     emit objectLiteChanged();
                 }
                 else
                 {
                     emit pointLiteChanged();
                     /* pmenu->createEmptyMenu( clickedPoint() );
                         pmenu->popup( QCursor::pos() );*/
                 }
                 //}
                 break;
             default:
                 ;
         }
     }
 }
 
 void SkyMapLite::mouseReleaseEvent(QMouseEvent *)
 {
     /*if ( ZoomRect.isValid() ) {
         stopTracking();
         SkyPoint newcenter = projector()->fromScreen( ZoomRect.center(), data->lst(), data->geo()->lat() );
         setFocus( &newcenter );
         setDestination( newcenter );
 
         //Zoom in on center of Zoom Circle, by a factor equal to the ratio
         //of the sky pixmap's width to the Zoom Circle's diameter
         float factor = float(width()) / float(ZoomRect.width());
         setZoomFactor( Options::zoomFactor() * factor );
     }*/
     setDefaultMouseCursor();
     ZoomRect = QRect(); //invalidate ZoomRect
 
     /*if(m_previewLegend) {
         slotCancelLegendPreviewMode();
     }*/
 
     //false if double-clicked, because it's unset there.
     if (mouseButtonDown)
     {
         mouseButtonDown = false;
         if (getSlewing())
         {
             setSlewing(false);
             if (Options::useAltAz())
                 setDestinationAltAz(focus()->alt(), focus()->az(), false);
             else
                 setDestination(*focus());
         }
         forceUpdate(); // is needed because after moving the sky not all stars are shown
     }
     // if middle button was pressed unset here
     midMouseButtonDown = false;
 }
 
 void SkyMapLite::mouseDoubleClickEvent(QMouseEvent *e)
 {
     if (e->button() == Qt::LeftButton && !projector()->unusablePoint(e->pos()))
     {
         mouseButtonDown = false;
         if (e->x() != width() / 2 || e->y() != height() / 2)
             slotCenter();
     }
 }
 
 void SkyMapLite::mouseMoveEvent(QMouseEvent *e)
 {
     if (Options::useHoverLabel())
     {
         //Start a single-shot timer to monitor whether we are currently hovering.
         //The idea is that whenever a moveEvent occurs, the timer is reset.  It
         //will only timeout if there are no move events for HOVER_INTERVAL ms
         m_HoverTimer.start(HOVER_INTERVAL);
         //DELETE? QToolTip::hideText();
     }
 
     //Are we defining a ZoomRect?
     /*if ( ZoomRect.center().x() > 0 && ZoomRect.center().y() > 0 ) {
         //cancel operation if the user let go of CTRL
         if ( !( e->modifiers() & Qt::ControlModifier ) ) {
             ZoomRect = QRect(); //invalidate ZoomRect
             update();
         } else {
             //Resize the rectangle so that it passes through the cursor position
             QPoint pcenter = ZoomRect.center();
             int dx = abs(e->x() - pcenter.x());
             int dy = abs(e->y() - pcenter.y());
             if ( dx == 0 || float(dy)/float(dx) > float(height())/float(width()) ) {
                 //Size rect by height
                 ZoomRect.setHeight( 2*dy );
                 ZoomRect.setWidth( 2*dy*width()/height() );
             } else {
                 //Size rect by height
                 ZoomRect.setWidth( 2*dx );
                 ZoomRect.setHeight( 2*dx*height()/width() );
             }
             ZoomRect.moveCenter( pcenter ); //reset center
 
             update();
             return;
         }
     }
     */
     if (projector()->unusablePoint(e->pos()))
         return; // break if point is unusable
 
     //determine RA, Dec of mouse pointer
     m_MousePoint = projector()->fromScreen(e->pos(), data->lst(), data->geo()->lat());
     double dyPix = 0.5 * height() - e->y();
     if (midMouseButtonDown) //zoom according to y-offset
     {
         float yoff = dyPix - y0;
         if (yoff > 10)
         {
             y0 = dyPix;
             slotZoomIn();
         }
         if (yoff < -10)
         {
             y0 = dyPix;
             slotZoomOut();
         }
     }
     if (mouseButtonDown)
     {
         // set the mouseMoveCursor and set slewing to true, if they are not set yet
         if (!mouseMoveCursor)
             setMouseMoveCursor();
         if (!getSlewing())
         {
             setSlewing(true);
             stopTracking(); //toggle tracking off
         }
 
         //Update focus such that the sky coords at mouse cursor remain approximately constant
         if (Options::useAltAz())
         {
             m_MousePoint.EquatorialToHorizontal(data->lst(), data->geo()->lat());
             clickedPoint()->EquatorialToHorizontal(data->lst(), data->geo()->lat());
             dms dAz  = m_MousePoint.az() - clickedPoint()->az();
             dms dAlt = m_MousePoint.altRefracted() - clickedPoint()->altRefracted();
             focus()->setAz(focus()->az().Degrees() - dAz.Degrees()); //move focus in opposite direction
             focus()->setAz(focus()->az().reduce());
             focus()->setAltRefracted(KSUtils::clamp(focus()->altRefracted().Degrees() - dAlt.Degrees(), -90.0, 90.0));
             focus()->HorizontalToEquatorial(data->lst(), data->geo()->lat());
         }
         else
         {
             dms dRA  = m_MousePoint.ra() - clickedPoint()->ra();
             dms dDec = m_MousePoint.dec() - clickedPoint()->dec();
             focus()->setRA(focus()->ra().Hours() - dRA.Hours()); //move focus in opposite direction
             focus()->setRA(focus()->ra().reduce());
             focus()->setDec(KSUtils::clamp(focus()->dec().Degrees() - dDec.Degrees(), -90.0, 90.0));
             focus()->EquatorialToHorizontal(data->lst(), data->geo()->lat());
         }
         //showFocusCoords();
 
         //redetermine RA, Dec of mouse pointer, using new focus
         m_MousePoint = projector()->fromScreen(e->pos(), data->lst(), data->geo()->lat());
         setClickedPoint(&m_MousePoint);
 
         forceUpdate(); // must be new computed
     }
     else //mouse button not down
     {
         if (Options::useAltAz())
             m_MousePoint.EquatorialToHorizontal(data->lst(), data->geo()->lat());
         emit mousePointChanged(&m_MousePoint);
     }
 }
 
 void SkyMapLite::wheelEvent(QWheelEvent *e)
 {
     if (e->delta() > 0)
     {
         zoomInOrMagStep(e->modifiers());
         //setRotation(rotation() + 0.1); TEST
     }
     else if (e->delta() < 0)
     {
         zoomOutOrMagStep(e->modifiers());
         //setRotation(rotation() - 0.1); TEST
     }
 }
 
 void SkyMapLite::touchEvent(QTouchEvent *e)
 {
     QList<QTouchEvent::TouchPoint> points = e->touchPoints();
 
     bool autoMode = false; //Always false for devices that doesn't support automatic mode
 #if defined(Q_OS_ANDROID)
     autoMode = getAutomaticMode();
 #endif
 
     if (points.length() == 2)
     {
         //Set tapBegan to false because user doesn't tap but either pans or pinches to zoom
         tapBegan = false;
         if (projector()->unusablePoint(points[0].pos()) || projector()->unusablePoint(points[1].pos()))
             return;
 
         //Pinch to zoom
         double x_old_diff = qFabs(points[1].lastPos().x() - points[0].lastPos().x());
         double y_old_diff = qFabs(points[1].lastPos().y() - points[0].lastPos().y());
 
         //Manhattan distance of old points
         double md_old = x_old_diff + y_old_diff;
 
         double x_diff = qFabs(points[1].pos().x() - points[0].pos().x());
         double y_diff = qFabs(points[1].pos().y() - points[0].pos().y());
 
         //Manhattan distance of new points
         double md_new = x_diff + y_diff;
 
         int zoomThreshold = 5;
 
         if (md_old - md_new < -zoomThreshold)
             zoomInOrMagStep(Qt::MetaModifier);
         else if (md_old - md_new > zoomThreshold)
             zoomOutOrMagStep(Qt::MetaModifier);
 
         double x_min = points[1].pos().x() < points[0].pos().x() ? points[1].pos().x() : points[0].pos().x();
         double y_min = points[1].pos().y() < points[0].pos().y() ? points[1].pos().y() : points[0].pos().y();
 
         //Center point on the line between 2 touch points used for moveEvent
         QPointF pinchCenter(x_min + x_diff / 2, y_min + y_diff / 2);
 
         //Pinch(turn) to rotate
         QPointF old_vec = points[1].lastPos() - points[0].lastPos();
         QPointF new_vec = points[1].pos() - points[0].pos();
 
         double old_vec_len = sqrt((old_vec.x() * old_vec.x()) + (old_vec.y() * old_vec.y()));
         double new_vec_len = sqrt((new_vec.x() * new_vec.x()) + (new_vec.y() * new_vec.y()));
 
         //Normalize vectors
         old_vec = QPointF(old_vec.x() / old_vec_len, old_vec.y() / old_vec_len);
         new_vec = QPointF(new_vec.x() / new_vec_len, new_vec.y() / new_vec_len);
 
         double old_atan = qAtan2(old_vec.y(), old_vec.x());
         double new_atan = qAtan2(new_vec.y(), new_vec.x());
 
         /*Workaround to solve the strange bug when sometimes signs of qAtan2 results
         for 2 vectors are different*/
         if ((new_atan > 0 && old_atan < 0) || (new_atan < 0 && old_atan > 0))
         {
             old_atan *= -1;
         }
 
         //Get the angle between two vectors
         /*double delta = new_atan - old_atan;
 
         //Rotation is under construction
         if(rotation() > 360) {
             setRotation(0);
         } else if(rotation() < 0) {
             setRotation(360);
         }
 
         //Scale the angle to speed up the rotation
         delta *= 100;
         setRotation(rotation() + delta);
         //update(); //Apply rotation*/
 
         //Allow movement of SkyMapLite while rotating or zooming
         if (!getCenterLocked() && !autoMode)
         {
             QMouseEvent *event = new QMouseEvent(QEvent::MouseButtonPress, pinchCenter, Qt::LeftButton, Qt::LeftButton,
                                                  Qt::ControlModifier);
             if (!pinch)
             {
                 m_MousePoint = projector()->fromScreen(pinchCenter, data->lst(), data->geo()->lat());
                 setClickedPoint(&m_MousePoint);
                 mouseButtonDown = true;
                 pinch           = true;
             }
             mouseMoveEvent(event);
             delete event;
         }
 
         if (e->touchPointStates() & Qt::TouchPointReleased)
         {
             setSlewing(false);
             if (pinch)
             {
                 pinch           = false;
                 mouseButtonDown = false;
             }
         }
     }
     else if (points.length() == 1 && !pinch && !autoMode)
     {
         QPointF point = points[0].screenPos();
         //Set clicked point (needed for pan)
         if (e->type() == QEvent::TouchBegin)
         {
             m_MousePoint = projector()->fromScreen(point, data->lst(), data->geo()->lat());
             setClickedPoint(&m_MousePoint);
             mouseButtonDown = true;
         }
         else if (e->type() == QEvent::TouchEnd)
         {
             mouseButtonDown = false;
             if (getSlewing())
             {
                 setSlewing(false);
                 if (Options::useAltAz())
                     setDestinationAltAz(focus()->alt(), focus()->az(), false);
                 else
                     setDestination(*focus());
             }
         }
 
         if (!projector()->unusablePoint(points[0].screenPos()))
         {
             if (!tapBegan && (e->touchPointStates() & Qt::TouchPointPressed))
             {
                 //We set tapBegan to true whenever user tapped on the screen
                 tapBegan = true;
                 m_tapBeganTimer.start(100);
             }
             else if ((e->touchPointStates() & Qt::TouchPointMoved) || getSlewing())
             {
                 //Set tapBegan to false because user doesn't tap but either pans or pinches to zoom
                 if (m_tapBeganTimer.remainingTime() > 0)
                 {
                     return;
                 }
                 else
                 {
                     m_tapBeganTimer.stop();
                 }
                 tapBegan = false;
 
                 QMouseEvent *event = new QMouseEvent(QEvent::MouseButtonPress, point, Qt::LeftButton, Qt::LeftButton,
                                                      Qt::ControlModifier);
                 mouseMoveEvent(event);
                 delete event;
 
                 //If user didn't pan and pinch to zoom tapBegan will be true
             }
             else if ((e->touchPointStates() & Qt::TouchPointReleased) && tapBegan)
             {
                 if (getSlewing())
                     setSlewing(false);
                 tapBegan = false;
                 //Show tap animation
                 emit posClicked(point);
                 //determine RA, Dec of touch
                 m_MousePoint = projector()->fromScreen(point, data->lst(), data->geo()->lat());
                 setClickedPoint(&m_MousePoint);
 
                 //Find object nearest to clickedPoint()
                 double maxrad =
                     1000.0 /
                     Options::
                     zoomFactor(); /* On high zoom-level it is very hard to select the object using touch screen.
                                             That's why radius remains constant*/
                 maxrad         = qMax(maxrad, 2.5);
                 SkyObject *obj = data->skyComposite()->objectNearest(clickedPoint(), maxrad);
                 setClickedObject(obj);
                 if (obj)
                     setClickedPoint(obj);
 
                 if (clickedObject())
                 {
                     emit objectLiteChanged();
                 }
                 else
                 {
                     emit pointLiteChanged();
                 }
             }
         }
     }
 }
 
 double SkyMapLite::zoomFactor(const int modifier)
 {
     double factor = (modifier & Qt::ControlModifier) ? DZOOM : 2.0;
     if (modifier & Qt::ShiftModifier)
         factor = sqrt(factor);
     return factor;
 }
 
 void SkyMapLite::zoomInOrMagStep(const int modifier)
 {
     if (modifier & Qt::AltModifier)
         incMagLimit(modifier);
     else if (modifier & Qt::MetaModifier) //Used in pinch-to-zoom gesture
     {
         setZoomFactor(Options::zoomFactor() + Options::zoomFactor() * 0.05);
     }
     else
         setZoomFactor(Options::zoomFactor() * zoomFactor(modifier));
 }
 
 void SkyMapLite::zoomOutOrMagStep(const int modifier)
 {
     if (modifier & Qt::AltModifier)
         decMagLimit(modifier);
     else if (modifier & Qt::MetaModifier) //Used in pinch-to-zoom gesture
     {
         setZoomFactor(Options::zoomFactor() - Options::zoomFactor() * 0.05);
     }
     else
         setZoomFactor(Options::zoomFactor() / zoomFactor(modifier));
 }
 
 double SkyMapLite::magFactor(const int modifier)
 {
     double factor = (modifier & Qt::ControlModifier) ? 0.1 : 0.5;
     if (modifier & Qt::ShiftModifier)
         factor *= 2.0;
     return factor;
 }
 
 void SkyMapLite::setMagLim(double magLim)
 {
     if (m_magLim != magLim)
     {
         m_magLim = magLim;
         if (m_magLim > 5.75954)
             m_magLim = 5.75954;
         if (m_magLim < 1.18778)
             m_magLim = 1.18778;
         emit magLimChanged(m_magLim);
 
         Options::setStarDensity(pow(10, (m_magLim - 0.35) / 2.222));
         //printf("maglim set to %3.1f\n", m_magLim);
         forceUpdate();
     }
 }
 
 void SkyMapLite::stopTracking()
 {
     KStarsLite *kstars = KStarsLite::Instance();
     emit positionChanged();
     if (kstars && Options::isTracking())
         kstars->slotTrack();
 }
 
 uint SkyMapLite::projType() const
 {
     return m_proj->type();
 }
 
 void SkyMapLite::incMagLimit(const int modifier)
 {
     m_magLim = 2.222 * log10(static_cast<double>(Options::starDensity())) + 0.35;
     m_magLim += magFactor(modifier);
     if (m_magLim > 5.75954)
         m_magLim = 5.75954;
     emit magLimChanged(m_magLim);
     Options::setStarDensity(pow(10, (m_magLim - 0.35) / 2.222));
     //printf("maglim set to %3.1f\n", m_magLim);
     forceUpdate();
 }
 
 void SkyMapLite::decMagLimit(const int modifier)
 {
     m_magLim = 2.222 * log10(static_cast<double>(Options::starDensity())) + 0.35;
     m_magLim -= magFactor(modifier);
     if (m_magLim < 1.18778)
         m_magLim = 1.18778;
     emit magLimChanged(m_magLim);
     Options::setStarDensity(pow(10, (m_magLim - 0.35) / 2.222));
     //printf("maglim set to %3.1f\n", m_magLim);
     forceUpdate();
 }