Improve the parts of celestial navigation:

- Added ability to toggle to using decimal degrees for various navigational data through follow the option "Use decimal degrees" in the main GUI (fix Stellarium#1344) 
- Added script with shortcut, which add ability to jump to random location for celestial navigation game and practice (fix Stellarium#1345)

plugins/NavStars/CMakeLists.txt

@@ -1,6 +1,6 @@
 SET(NS_MAJOR 0)
 SET(NS_MINOR 3)
-SET(NS_PATCH 1)
+SET(NS_PATCH 2)
 SET(NS_VERSION "${NS_MAJOR}.${NS_MINOR}.${NS_PATCH}")
 
 SET(CMAKE_INSTALL_PREFIX $HDATALOC)

plugins/NavStars/src/NavStars.cpp

@@ -69,7 +69,7 @@ NavStars::NavStars()
 	, upperLimb(false)
 	, highlightWhenVisible(false)
 	, limitInfoToNavStars(false)	
-	, tabulatedDisplay(false)	
+	, tabulatedDisplay(false)
 	, toolbarButton(Q_NULLPTR)
 {
 	setObjectName("NavStars");
@@ -124,6 +124,8 @@ void NavStars::init()
 	addAction("actionShow_NavStars", N_("Navigational Stars"), N_("Mark the navigational stars"), "navStarsVisible", "");
 
 	connect(StelApp::getInstance().getCore(), SIGNAL(configurationDataSaved()), this, SLOT(saveSettings()));
+	connect(&StelApp::getInstance(), SIGNAL(flagShowDecimalDegreesChanged(bool)), this, SLOT(setUseDecimalDegrees()));
+	setUseDecimalDegrees();
 
 	// Toolbar button
 	StelGui* gui = dynamic_cast<StelGui*>(StelApp::getInstance().getGui());
@@ -243,6 +245,11 @@ bool NavStars::getNavStarsMarks() const
 	return markerFader;
 }
 
+void NavStars::setUseDecimalDegrees()
+{
+	NavStarsCalculator::useDecimalDegrees = (StelApp::getInstance().getFlagShowDecimalDegrees() ? true : false);
+}
+
 void NavStars::restoreDefaultConfiguration(void)
 {
 	// Remove the whole section from the configuration file
@@ -474,14 +481,12 @@ void NavStars::addExtraInfo(StelCore *core)
 				}
 			}
 		}
-		if (doExtraInfo) {
-			withTables = stelApp.getFlagUseFormattingOutput();
-			extraInfo(core, selectedObject, withTables);
-		}
+		if (doExtraInfo)
+			extraInfo(core, selectedObject);
 	}
 }
 
-void NavStars::extraInfo(StelCore* core, const StelObjectP& selectedObject, bool withTables)
+void NavStars::extraInfo(StelCore* core, const StelObjectP& selectedObject)
 {
 	double jd, jde, x = 0., y = 0.;
 	QString extraText = "", englishName = selectedObject->getEnglishName();
@@ -526,10 +531,9 @@ void NavStars::extraInfo(StelCore* core, const StelObjectP& selectedObject, bool
 		displayStandardInfo(selectedObject, calc, extraText);
 }
 
-
 void NavStars::displayStandardInfo(const StelObjectP& selectedObject, NavStarsCalculator& calc, const QString& extraText)
 {
-	Q_UNUSED(extraText)
+	Q_UNUSED(extraText)	
 	QString temp;
 	StelObject::InfoStringGroup infoGroup = StelObject::OtherCoord;
 	selectedObject->addToExtraInfoString(infoGroup, 
@@ -554,7 +558,7 @@ void NavStars::displayStandardInfo(const StelObjectP& selectedObject, NavStarsCa
 
 void NavStars::displayTabulatedInfo(const StelObjectP& selectedObject, NavStarsCalculator& calc, const QString& extraText)
 {
-	StelObject::InfoStringGroup infoGroup = StelObject::OtherCoord;	
+	StelObject::InfoStringGroup infoGroup = StelObject::OtherCoord;		
 	selectedObject->addToExtraInfoString(infoGroup, 
 		oneRowTwoCells(qc_("UTC", "Universal Time Coordinated"), calc.getUTC(), "", false));
 	selectedObject->addToExtraInfoString(infoGroup, "<table style='margin:0em 0em 0em -0.125em;border-spacing:0px;border:0px;'>");

plugins/NavStars/src/NavStars.hpp

@@ -156,7 +156,7 @@ public slots:
 
 	//! For the currently select object add the extraString info
 	//! in a format that matches the Nautical Almanac.
-	void extraInfo(StelCore* core, const StelObjectP& selectedObject, bool withTables);
+	void extraInfo(StelCore* core, const StelObjectP& selectedObject);
 
 	//! Used to display the extraInfoStrings in standard "paired" lines (for example gha/dev)
 	void displayStandardInfo(const StelObjectP& selectedObject, NavStarsCalculator& calc, const QString& extraText);
@@ -177,6 +177,7 @@ public slots:
 private slots:
 	//! Call when button "Save settings" in main GUI are pressed
 	void 	saveSettings() { saveConfiguration(); }
+	void setUseDecimalDegrees();
 
 signals:
 	//! Emitted when display of markers have been changed.
@@ -190,13 +191,12 @@ private slots:
 	// The current set of navigational stars
 	NavigationalStarsSet currentNSSet;
 
-	bool withTables;
 	bool enableAtStartup;
 	bool starLabelsState;
 	bool upperLimb;
 	bool highlightWhenVisible;
 	bool limitInfoToNavStars;
-	bool tabulatedDisplay;
+	bool tabulatedDisplay;	
 
 	QVector<QString> permittedObjects;
 

plugins/NavStars/src/NavStarsCalculator.cpp

@@ -26,6 +26,7 @@ using std::asin;
 using std::acos;
 
 bool NavStarsCalculator::useExtraDecimals = false;
+bool NavStarsCalculator::useDecimalDegrees = false;
 
 #ifdef _DEBUG
 static void examineCalc(NavStarsCalculator& calc);
@@ -95,15 +96,23 @@ void NavStarsCalculator::execute()
 QString NavStarsCalculator::radToDm(double rad, const QString pos, const QString neg)
 {
 	QString rval;
-	bool sign;
-	double s, md;
-	unsigned int d, m;
-	StelUtils::radToDms(rad, sign, d, m, s);
-	md = static_cast<double>(m);
-	md += (s / 60.);
-	rval += (sign ? pos : neg)
-		+ QString::number(d, 'f', 0) + QString("&deg;")
-		+ QString::number(md, 'f', useExtraDecimals ? 4 : 1) + "'";
+	bool sign;	
+	if (useDecimalDegrees)
+	{
+		double dd;
+		StelUtils::radToDecDeg(rad, sign, dd);
+		rval = QString("%1%2&deg;").arg(sign ? pos : neg).arg(QString::number(dd, 'f', useExtraDecimals ? 6 : 5));
+	}
+	else
+	{
+		double s, md;
+		unsigned int d, m;
+		StelUtils::radToDms(rad, sign, d, m, s);
+
+		md = static_cast<double>(m);
+		md += (s / 60.);
+		rval = QString("%1%2&deg;%3'").arg(sign ? pos : neg).arg(QString::number(d, 'f', 0)).arg(QString::number(md, 'f', useExtraDecimals ? 4 : 1));
+	}
 #ifdef _DEBUG
 	// An easier to use display when working with Google Earth, 
 	// Google Maps, custom software tools, etc. Keep everything

plugins/NavStars/src/NavStarsCalculator.hpp

@@ -87,6 +87,7 @@ class NavStarsCalculator
 	static double wrap360(double d);
 
 	static bool useExtraDecimals;
+	static bool useDecimalDegrees;
 
 private:
 	QString utc;

scripts/random_location.ssc

@@ -0,0 +1,28 @@
+//
+// Name: Random location
+// Author: Alexander Wolf
+// Shortcut: Ctrl+D,L
+// License: Public Domain
+// Version: 1.0
+// Description: This script will help you make practical works for celestial navigation - he sets a random location and hides it from the GUI.
+//
+
+function randomFloat(min, max) {
+    return min + (max - min) * Math.random();
+}
+
+if (core.isModuleLoaded("Satellites"))
+{
+    if (Satellites.getFlagHintsVisible()) {
+        Satellites.setFlagHintsVisible(false);
+    }
+}
+if (core.isModuleLoaded("NavStars"))
+{
+    if (!NavStars.getNavStarsMarks()) {
+        NavStars.setNavStarsMarks(true);
+    }
+}
+core.wait(0.5);
+core.setObserverLocation(randomFloat(-180., 180.), randomFloat(-90., 90.), 1., 1., "unknown location", "Earth");
+core.wait(1.);

src/translations.h

@@ -690,6 +690,8 @@ class Translations
 		N_("Uranian analemma");
 		// TRANSLATORS: Name of script
 		N_("Messier Marathon");
+		// TRANSLATORS: Name of script
+		N_("Random location");
 
 		// =====================================================================
 		// Script descriptions
@@ -739,6 +741,7 @@ class Translations
 		N_("A demonstration of the analemma - the path of the Sun across the sky during the year on Uranus.");
 		N_("Messier Marathon on March 20, 2020. The data for the script are taken from GaoXing's observation log: http://www.xjltp.com/2_huodong/2_030301.htm");
 		N_("Creates 6 tiles (North/East/South/West/Up/Down) for a skybox. These can be further used e.g. in Unity3D or other 3D environments. Output directory and filenames can be set with environment variables STEL_SKYBOX_DIR and STEL_SKYBOX_BASENAME. A data file is also written, you can set its name with environment variable OUTPUT_DATA. Please read the script to understand how to apply it to your projects.");
+		N_("This script will help you make practical works for celestial navigation - he sets a random location and hides it from the GUI.");
 
 		// =====================================================================
 		// List of GUI elements (Qt's dialogs)