Bump minimum Qt version to 5.15 (#8129)

include/AutomationClip.h

@@ -226,11 +226,7 @@ private:
 
 	// Mutex to make methods involving automation clips thread safe
 	// Mutable so we can lock it from const objects
-#if (QT_VERSION >= QT_VERSION_CHECK(5,14,0))
 	mutable QRecursiveMutex m_clipMutex;
-#else
-	mutable QMutex m_clipMutex;
-#endif
 
 	AutomationTrack * m_autoTrack;
 	std::vector<jo_id_t> m_idsToResolve;

include/DeprecationHelper.h

@@ -38,37 +38,6 @@
 namespace lmms
 {
 
-/**
- * @brief horizontalAdvance is a backwards-compatible adapter for
- * QFontMetrics::horizontalAdvance and width functions.
- * @param metrics
- * @param text
- * @return text's horizontal advance based on metrics.
- */
-inline int horizontalAdvance(const QFontMetrics& metrics, const QString& text)
-{
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 11, 0))
-	return metrics.horizontalAdvance(text);
-#else
-	return metrics.width(text);
-#endif
-}
-
-/**
- * @brief position is a backwards-compatible adapter for
- * QWheelEvent::position and pos functions.
- * @param wheelEvent
- * @return the position of wheelEvent
- */
-inline QPoint position(const QWheelEvent* wheelEvent)
-{
-#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
-	return wheelEvent->position().toPoint();
-#else
-	return wheelEvent->pos();
-#endif
-}
-
 /**
  * @brief position is a backwards-compatible adapter for
  * QDropEvent::position and pos functions.

include/EffectSelectDialog.h

@@ -63,18 +63,10 @@ protected:
 		QString name = sourceModel()->data(nameIndex, Qt::DisplayRole).toString();
 		QString type = sourceModel()->data(typeIndex, Qt::DisplayRole).toString();
 
-		// TODO: cleanup once we drop Qt5 support 
-#if (QT_VERSION >= QT_VERSION_CHECK(5,12,0))
 		QRegularExpression nameRegularExpression(filterRegularExpression());
 		nameRegularExpression.setPatternOptions(QRegularExpression::CaseInsensitiveOption);
 		
 		bool nameFilterPassed = nameRegularExpression.match(name).capturedStart() != -1;
-#else 
-		QRegExp nameRegularExpression(filterRegExp());
-		nameRegularExpression.setCaseSensitivity(Qt::CaseInsensitive);
-
-		bool nameFilterPassed = nameRegularExpression.indexIn(name) != -1;
-#endif
 
 		bool typeFilterPassed = type.contains(m_effectTypeFilter, Qt::CaseInsensitive);
 

include/FileBrowser.h

@@ -164,12 +164,8 @@ private:
 
 	//! This should only be accessed or modified when m_pphMutex is held
 	PlayHandle* m_previewPlayHandle;
-	
-#if (QT_VERSION >= QT_VERSION_CHECK(5,14,0))
+
 	QRecursiveMutex m_pphMutex;
-#else
-	QMutex m_pphMutex;
-#endif
 
 	QList<QAction*> getContextActions(FileItem* item, bool songEditor);
 

include/RemotePlugin.h

@@ -27,9 +27,7 @@
 
 #include <QThread>
 #include <QProcess>
-#if (QT_VERSION >= QT_VERSION_CHECK(5,14,0))
-#include <QRecursiveMutex>  // IWYU pragma: keep
-#endif
+#include <QRecursiveMutex>
 
 #include "RemotePluginBase.h"
 #include "SharedMemory.h"
@@ -166,11 +164,7 @@ private:
 	QString m_exec;
 	QStringList m_args;
 
-#if (QT_VERSION >= QT_VERSION_CHECK(5,14,0))
 	QRecursiveMutex m_commMutex;
-#else
-	QMutex m_commMutex;
-#endif
 	bool m_splitChannels;
 
 	SharedMemory<float[]> m_audioBuffer;