Fixing deprecation warnings by QT5.15 (paving the way for Qt6)

src/main/Error.cc

@@ -77,9 +77,9 @@ Error::Error(const QString &message, const QString &infotext, const QString &det
 	if (level == error::fatal) { //currently not used
 		QString msg;
 		QTextStream ss(&msg);
-		ss << QMessageBox::tr("Aborted after fatal error:") << endl;
-		ss << message << endl;
-		ss << infotext << endl << details;
+		ss << QMessageBox::tr("Aborted after fatal error:") << Qt::endl;
+		ss << message << Qt::endl;
+		ss << infotext << Qt::endl << details;
 		throw std::runtime_error(msg.toStdString());
 		//TODO: autosave log if this level is ever actually used
 	}

src/main/common.h

@@ -35,6 +35,15 @@
 #include <QStringList>
 #include <QtXml>
 #include <QtXmlPatterns/QAbstractMessageHandler>
+#include <QtGlobal>
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 14, 0)
+namespace Qt
+{
+    static auto endl = ::endl;
+    static auto SkipEmptyParts = QString::SkipEmptyParts;
+}
+#endif
 
 namespace html {
 

src/main/main.cc

@@ -238,7 +238,7 @@ inline void perform_cmd_ini_operations(const QCommandLineParser &parser, const c
 				const QStringList mod_ini_list( pos.split("=") );
 				if (mod_ini_list.size() == 2) {
 					const QStringList param_list(mod_ini_list.at(0).trimmed().split(
-					    Cst::sep, QString::SkipEmptyParts));
+					    Cst::sep, Qt::SkipEmptyParts));
 					if (param_list.size() == 2) //silently skip wrong formats
 						cmd_ini.set(param_list.at(0), param_list.at(1),
 						    mod_ini_list.at(1).trimmed());

src/panels/Checklist.cc

@@ -213,7 +213,7 @@ void Checklist::onPropertySet()
 	const QString values( this->property("ini_value").toString() );
 	if (ini_value_ == values)
 		return;
-	const QStringList value_list( values.split(QRegExp("\\s+"), QString::SkipEmptyParts) );
+	const QStringList value_list( values.split(QRegExp("\\s+"), Qt::SkipEmptyParts) );
 
 	/* clear the list, overwriting current settings */
 	for (int ii = 0; ii < list_->count(); ++ii) {

src/panels/Choice.cc

@@ -203,7 +203,7 @@ void Choice::onPropertySet()
 	const QString values( this->property("ini_value").toString() );
 	if (ini_value_ == values)
 		return;
-	const QStringList value_list( values.split(QRegExp("\\s+"), QString::SkipEmptyParts) );
+	const QStringList value_list( values.split(QRegExp("\\s+"), Qt::SkipEmptyParts) );
 
 	if (checkbox_container_->count() == 1) {
 		topLog(QString(tr(R"(XML error: No checkable options set for Choice panel "%1::%2".)").arg(