File indexing completed on 2024-04-21 14:46:51

 /*
     SPDX-FileCopyrightText: 2007 Jason Harris <kstars@30doradus.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #pragma once
 
 #include <kplotwidget.h>
 
 #include <QPoint>
 
 class GeoLocation;
 
 /**
  * @class AVTPlotWidget
  * @short An extension of the KPlotWidget for the AltVsTime tool.
  * The biggest difference is that in addition to the plot objects, it draws the "ground" below
  * Alt=0 and draws the sky light blue for day times, and black for night times. The transition
  * between day and night is drawn with a gradient, and the position follows the actual
  * sunrise/sunset times of the given date/location. Also, this plot widget provides two
  * time axes (local time along the bottom, and local sideral time along the top). Finally, it
  * provides user interaction: on mouse click, it draws crosshairs at the mouse position with
  * labels for the time and altitude.
  *
  * @version 1.0
  * @author Jason Harris
  */
 class AVTPlotWidget : public KPlotWidget
 {
     Q_OBJECT
   public:
     explicit AVTPlotWidget(QWidget *parent = nullptr);
 
     /**
      * Set the fractional positions of the Sunrise and Sunset positions, in units where last
      * midnight was 0.0, and next midnight is 1.0. i.e., if Sunrise is at 06:00, then we set
      * it as 0.25 in this function.  Likewise, if Sunset is at 18:00, then we set it as
      * 0.75 in this function.
      * @param sr the fractional position of Sunrise
      * @param ss the fractional position of Sunset
      */
     void setSunRiseSetTimes(double sr, double ss);
 
     void setDawnDuskTimes(double da, double du);
 
     void setMinMaxSunAlt(double min, double max);
 
     /**
      * Set the fractional positions of moonrise and moon set in units
      * where last midnight was 0.0 and next midnight is 1.0
      */
     void setMoonRiseSetTimes(double mr, double ms);
 
     /**
      * @short Set the moon illumination
      * @param mi Moon illuminated fraction (0.0 to 1.0)
      * @note Used to determine the brightness of the gradient representing lunar skyglow
      */
     void setMoonIllum(double mi);
 
     /**
      * @short Set the GeoLocation
      * @param geo_ Used to convert and format the current time correctly
      * @warning Might be better to skip the entire shebang and include the KSAlmanac calls within AVTPlotWidget
      */
     inline void setGeoLocation(const GeoLocation *geo_) { geo = geo_; }
 
   protected:
     /**
      * Handle mouse move events. If the mouse button is down, draw crosshair lines
      * centered at the cursor position. This allows the user to pinpoint specific
      * position sin the plot.
      */
     void mouseMoveEvent(QMouseEvent *e) override;
 
     /** Simply calls mouseMoveEvent(). */
     void mousePressEvent(QMouseEvent *e) override;
 
     /** Reset the MousePoint to a null value, to erase the crosshairs */
     void mouseDoubleClickEvent(QMouseEvent *e) override;
 
     /** Redraw the plot. */
     void paintEvent(QPaintEvent *e) override;
 
   private:
     double SunRise { 0.25 };
     double SunSet { 0.75 };
     double Dawn { 0 };
     double Dusk { 0 };
     double SunMinAlt { 0 };
     double SunMaxAlt { 0 };
     double MoonRise { 0 };
     double MoonSet { 0 };
     double MoonIllum { 0 };
     QPoint MousePoint;
     const GeoLocation *geo { nullptr };
 };