File indexing completed on 2024-04-14 14:11:46

 /*
     SPDX-FileCopyrightText: 2001 Jason Harris <jharris@30doradus.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "mapcanvas.h"
 #include <cstdlib>
 
 #include <QPainter>
 #include <QPixmap>
 #include <QMouseEvent>
 #include <QPaintEvent>
 #include <QStandardPaths>
 #include "kspaths.h"
 
 #include "dialogs/locationdialog.h"
 #include "kstars.h"
 #include "kstarsdata.h"
 
 MapCanvas::MapCanvas(QWidget *parent) : QFrame(parent), ld(nullptr)
 {
     setAutoFillBackground(false);
 
     QString bgFile = KSPaths::locate(QStandardPaths::AppLocalDataLocation, "geomap.jpg");
     bgImage        = new QPixmap(bgFile);
     xsize= width();
     ysize = height();
     ximage = bgImage->width();
     yimage = bgImage->height();
     ratio = ximage / yimage;
     xscale = xsize / 360;
     yscale = ysize / (360 / ratio);
     origin.setX(width() / 2);
     origin.setY(height() / 2);
 }
 
 MapCanvas::~MapCanvas()
 {
     delete bgImage;
 }
 
 void MapCanvas::setGeometry(int x, int y, int w, int h)
 {
     QWidget::setGeometry(x, y, w, h);
     origin.setX(w / 2);
     origin.setY(h / 2);
 }
 
 void MapCanvas::setGeometry(const QRect &r)
 {
     QWidget::setGeometry(r);
     origin.setX(r.width() / 2);
     origin.setY(r.height() / 2);
 }
 
 void MapCanvas::mousePressEvent(QMouseEvent *e)
 {
     //Determine Lat/Long corresponding to event press
     int lng = ((e->x() - origin.x()) / xscale);
     int lat = ((origin.y() - e->y()) / yscale);
 
     if (ld)
         ld->findCitiesNear(lng, lat);
 }
 
 void MapCanvas::paintEvent(QPaintEvent *)
 {
     QPainter p;
 
     xsize= width();
     ysize = height();
     ximage = bgImage->width();
     yimage = bgImage->height();
     ratio = ximage / yimage;
     xscale = xsize / 360;
     yscale = ysize / (360 / ratio);
     origin.setX(width() / 2);
     origin.setY(height() / 2);
 
     //prepare the canvas
     p.begin(this);
     p.drawPixmap(0, 0, bgImage->scaled(size()));
     p.setPen(QPen(QColor("SlateGrey")));
 
     //Draw cities
     QPoint o;
 
     foreach (GeoLocation *g, KStarsData::Instance()->getGeoList())
     {
         convertAndScale(o, *g);
 
         if (o.x() >= 0 && o.x() <= width() && o.y() >= 0 && o.y() <= height())
         {
             p.drawPoint(o.x(), o.y());
         }
     }
 
     // FIXME: there must be better way to this. Without bothering LocationDialog
     if (ld)
     {
         //redraw the cities that appear in the filtered list, with a white pen
         //If the list has not been filtered, skip the redraw.
         if (ld->filteredList().size())
         {
             p.setPen(Qt::white);
             foreach (GeoLocation *g, ld->filteredList())
             {
                 convertAndScale(o, *g);
 
                 if (o.x() >= 0 && o.x() <= width() && o.y() >= 0 && o.y() <= height())
                 {
                     p.drawPoint(o.x(), o.y());
                 }
             }
         }
 
         GeoLocation *g = ld->selectedCity();
         if (g)
         {
             convertAndScale(o, *g);
 
             p.setPen(Qt::red);
             p.setBrush(Qt::red);
             p.drawEllipse(o.x() - 3, o.y() - 3, 6, 6);
             p.drawLine(o.x() - 16, o.y(), o.x() - 8, o.y());
             p.drawLine(o.x() + 8, o.y(), o.x() + 16, o.y());
             p.drawLine(o.x(), o.y() - 16, o.x(), o.y() - 8);
             p.drawLine(o.x(), o.y() + 8, o.x(), o.y() + 16);
             p.setPen(Qt::white);
             p.setBrush(Qt::white);
         }
     }
     p.end();
 }
 
 void MapCanvas::convertAndScale(QPoint &o, GeoLocation &g)
 {
     int xpos = g.lng()->Degrees();
     int ypos = g.lat()->Degrees();
     o.setX((xpos * xscale) + origin.x());
     o.setY(height() - ((ypos * yscale) + origin.y()));
 }