File indexing completed on 2024-04-21 03:44:59

 /*
     SPDX-FileCopyrightText: 2001 Jason Harris <jharris@30doradus.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #ifndef MAPCANVAS_H
 #define MAPCANVAS_H
 
 #include <QFrame>
 #include <QPixmap>
 #include <QMouseEvent>
 #include <QPaintEvent>
 #include <geolocation.h>
 
 /** @class MapCanvas
     *Used in LocationDialog for displaying a map of the Earth.
     *In addition, cities in the database are drawn as grey or white dots.
     *Also, the widget processes mouse clicks, to trim the list of
     *cities to those near the mouse click.
     *@short Widget used in the LocationDialog for displaying the world map.
     *@author Jason Harris
     *@version 1.0
     */
 
 class LocationDialog;
 class QPixmap;
 
 class MapCanvas : public QFrame
 {
     Q_OBJECT
   public:
     /**Default constructor.  Initialize the widget: create pixmaps, load the
          * world map image
          * @param parent pointer to the parent LocationDialog
          */
     explicit MapCanvas(QWidget *parent);
 
     /**Destructor (empty) */
     ~MapCanvas() override;
 
     /** Set location dialog */
     // FIXME: This is temporary plug
     void setLocationDialog(LocationDialog *loc) { ld = loc; }
   public slots:
     /**Set the geometry of the map widget (overloaded from QWidget).
          * Resizes the size of the map pixmap to match the widget, and resets
          * the Origin QPoint so it remains at the center of the widget.
          * @note this is called automatically by resize events.
          * @p x the x-position of the widget
          * @p y the y-position of the widget
          * @p w the width of the widget
          * @p h the height of the widget
          */
     virtual void setGeometry(int x, int y, int w, int h);
 
     /**Set the geometry of the map widget (overloaded from QWidget).
          * Resizes the size of the map pixmap to match the widget, and resets
          * the Origin QPoint so it remains at the center of the widget.
          * This function behaves just like the above function.  It differs
          * only in the data type of its argument.
          * @note this is called automatically by resize events.
          * @p r QRect describing geometry
          */
     virtual void setGeometry(const QRect &r);
 
   protected:
     /**Draw the map.  Draw grey dots on the locations of all cities,
          * and highlight the cities which match the current filters as
          * white dits.  Also draw a red crosshairs on the
          * currently-selected city.
          * @see LocationDialog
          */
     void paintEvent(QPaintEvent *e) override;
 
     /**Trim the list of cities so that only those within 2 degrees
          * of the mouse click are shown in the list.
          * @see LocationDialog
          */
     void mousePressEvent(QMouseEvent *e) override;
 
     /**Convert geo co-ordinates to a scaled position on the map*/
     void convertAndScale(QPoint &o, GeoLocation &g);
 
   private:
     LocationDialog *ld;
     QPixmap *bgImage;
     QString BGColor;
     QPoint origin;
     double xsize;
     double ysize;
     double ximage;
     double yimage;
     double ratio;
     double xscale;
     double yscale;
 };
 
 #endif