From a50fa28c08ad226aa5c7a39b492d8c917b577290 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20T=C5=AFma?= <tumic@cbox.cz>
Date: Sat, 18 Mar 2023 09:51:07 +0100
Subject: [PATCH] Properly chceck for GCS/PCS files

---
 src/GUI/app.cpp | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/GUI/app.cpp b/src/GUI/app.cpp
index e18ce0cd..b4d55242 100644
--- a/src/GUI/app.cpp
+++ b/src/GUI/app.cpp
@@ -7,6 +7,7 @@
 #include <QLibraryInfo>
 #include <QSurfaceFormat>
 #include <QImageReader>
+#include <QFileInfo>
 #ifdef Q_OS_ANDROID
 #include <QCoreApplication>
 #include <QJniObject>
@@ -154,10 +155,13 @@ void App::loadDatums()
 	QString ellipsoidsFile(ProgramPaths::ellipsoidsFile());
 	QString gcsFile(ProgramPaths::gcsFile());
 
-	if (ellipsoidsFile.isNull())
+	if (!QFileInfo::exists(ellipsoidsFile)) {
 		qWarning("No ellipsoids file found.");
-	if (gcsFile.isNull())
+		ellipsoidsFile = QString();
+	} if (!QFileInfo::exists(gcsFile)) {
 		qWarning("No GCS file found.");
+		gcsFile = QString();
+	}
 
 	if (!ellipsoidsFile.isNull() && !gcsFile.isNull()) {
 		Ellipsoid::loadList(ellipsoidsFile);
@@ -170,8 +174,9 @@ void App::loadPCSs()
 {
 	QString pcsFile(ProgramPaths::pcsFile());
 
-	if (pcsFile.isNull())
+	if (!QFileInfo::exists(pcsFile)) {
 		qWarning("No PCS file found.");
-	else
+		qWarning("Maps based on a projection different from EPSG:3857 won't work.");
+	} else
 		PCS::loadList(pcsFile);
 }