Bump minimum Qt version to 5.15 (#8129)

plugins/CarlaBase/Carla.cpp

@@ -846,17 +846,6 @@ CarlaParamsView::CarlaParamsView(CarlaInstrumentView* const instrumentView, QWid
 	splitter->addWidget(outputFrame);
 	verticalLayout->addWidget(splitter);
 
-#if QT_VERSION < 0x50C00
-	// Workaround for a bug in Qt versions below 5.12,
-	// where argument-dependent-lookup fails for QFlags operators
-	// declared inside a namespace.
-	// This affects the Q_DECLARE_OPERATORS_FOR_FLAGS macro in Instrument.h
-	// See also: https://codereview.qt-project.org/c/qt/qtbase/+/225348
-
-	using ::operator|;
-
-#endif
-
 	// -- Sub window
 	auto win = new CarlaParamsSubWindow(getGUI()->mainWindow()->workspace()->viewport(),
 		Qt::SubWindow | Qt::CustomizeWindowHint | Qt::WindowTitleHint | Qt::WindowSystemMenuHint);
@@ -1051,17 +1040,6 @@ void CarlaParamsView::windowResized()
 
 void CarlaParamsView::addKnob(uint32_t index)
 {
-#if QT_VERSION < 0x50C00
-	// Workaround for a bug in Qt versions below 5.12,
-	// where argument-dependent-lookup fails for QFlags operators
-	// declared inside a namespace.
-	// This affects the Q_DECLARE_OPERATORS_FOR_FLAGS macro in Instrument.h
-	// See also: https://codereview.qt-project.org/c/qt/qtbase/+/225348
-
-	using ::operator|;
-
-#endif
-
 	bool output = m_carlaInstrument->m_paramModels[index]->isOutput();
 	if (output)
 	{

plugins/GranularPitchShifter/GranularPitchShifterControlDialog.cpp

@@ -139,10 +139,6 @@ QString GranularPitchShifterHelpView::s_helpText=
 
 GranularPitchShifterHelpView::GranularPitchShifterHelpView():QTextEdit(s_helpText)
 {
-#if (QT_VERSION < QT_VERSION_CHECK(5,12,0))
-	// Bug workaround: https://codereview.qt-project.org/c/qt/qtbase/+/225348
-	using ::operator|;
-#endif
 	setWindowTitle("Granular Pitch Shifter Help");
 	setTextInteractionFlags(Qt::TextSelectableByKeyboard | Qt::TextSelectableByMouse);
 	getGUI()->mainWindow()->addWindowedWidget(this);

plugins/Lb302/Lb302.cpp

@@ -441,11 +441,8 @@ QString Lb302Synth::nodeName() const
 // OBSOLETE. Break apart once we get Q_OBJECT to work. >:[
 void Lb302Synth::recalcFilter()
 {
-#if (QT_VERSION >= QT_VERSION_CHECK(5,14,0))
 	vcf.loadRelaxed()->recalc();
-#else
-	vcf.load()->recalc();
-#endif
+
 	// THIS IS OLD 3pole/24dB code, I may reintegrate it.  Don't need it
 	// right now.   Should be toggled by LB_24_RES_TRICK at the moment.
 
@@ -700,11 +697,8 @@ void Lb302Synth::initNote( Lb302Note *n)
 
 	if(n->dead ==0){
 		// Swap next two blocks??
-#if (QT_VERSION >= QT_VERSION_CHECK(5,14,0))
 		vcf.loadRelaxed()->playNote();
-#else
-		vcf.load()->playNote();
-#endif
+
 		// Ensure envelope is recalculated
 		vcf_envpos = ENVINC;
 

plugins/SlewDistortion/SlewDistortionControlDialog.cpp

@@ -474,10 +474,6 @@ QString SlewDistortionHelpView::s_helpText = tr(
 
 SlewDistortionHelpView::SlewDistortionHelpView() : QTextEdit(s_helpText)
 {
-#if (QT_VERSION < QT_VERSION_CHECK(5,12,0))
-	// Bug workaround: https://codereview.qt-project.org/c/qt/qtbase/+/225348
-	using ::operator|;
-#endif
 	setWindowTitle("Slew Distortion Help");
 	setTextInteractionFlags(Qt::TextSelectableByKeyboard | Qt::TextSelectableByMouse);
 	getGUI()->mainWindow()->addWindowedWidget(this);

plugins/Vestige/Vestige.cpp

@@ -922,17 +922,6 @@ ManageVestigeInstrumentView::ManageVestigeInstrumentView( Instrument * _instrume
 							QWidget * _parent, VestigeInstrument * m_vi2 ) :
 	InstrumentViewFixedSize( _instrument, _parent )
 {
-#if QT_VERSION < 0x50C00
-	// Workaround for a bug in Qt versions below 5.12,
-	// where argument-dependent-lookup fails for QFlags operators
-	// declared inside a namespace.
-	// This affects the Q_DECLARE_OPERATORS_FOR_FLAGS macro in Instrument.h
-	// See also: https://codereview.qt-project.org/c/qt/qtbase/+/225348
-
-	using ::operator|;
-
-#endif
-
 	m_vi = m_vi2;
 	m_vi->m_scrollArea = new QScrollArea( this );
 	widget = new QWidget(this);

plugins/VstEffect/VstEffectControlDialog.cpp

@@ -48,16 +48,6 @@ VstEffectControlDialog::VstEffectControlDialog( VstEffectControls * _ctl ) :
 	m_plugin( nullptr ),
 	tbLabel( nullptr )
 {
-#if QT_VERSION < 0x50C00
-	// Workaround for a bug in Qt versions below 5.12,
-	// where argument-dependent-lookup fails for QFlags operators
-	// declared inside a namespace.
-	// This affects the Q_DECLARE_OPERATORS_FOR_FLAGS macro in Instrument.h
-	// See also: https://codereview.qt-project.org/c/qt/qtbase/+/225348
-
-	using ::operator|;
-#endif
-
 	auto l = new QGridLayout(this);
 	l->setContentsMargins( 10, 10, 10, 10 );
 	l->setVerticalSpacing( 2 );

plugins/VstEffect/VstEffectControls.cpp

@@ -315,19 +315,9 @@ namespace gui
 ManageVSTEffectView::ManageVSTEffectView( VstEffect * _eff, VstEffectControls * m_vi ) :
 	m_effect( _eff )
 {
-#if QT_VERSION < 0x50C00
-	// Workaround for a bug in Qt versions below 5.12,
-	// where argument-dependent-lookup fails for QFlags operators
-	// declared inside a namespace.
-	// This affects the Q_DECLARE_OPERATORS_FOR_FLAGS macro in Instrument.h
-	// See also: https://codereview.qt-project.org/c/qt/qtbase/+/225348
-
-	using ::operator|;
-#endif
-
 	m_vi2 = m_vi;
 	widget = new QWidget();
-        m_vi->m_scrollArea = new QScrollArea( widget );
+	m_vi->m_scrollArea = new QScrollArea(widget);
 	l = new QGridLayout( widget );
 
 	m_vi->m_subWindow = getGUI()->mainWindow()->addWindowedWidget(nullptr, Qt::SubWindow |

plugins/Xpressive/Xpressive.cpp

@@ -861,18 +861,6 @@ QString XpressiveHelpView::s_helpText=
 
 XpressiveHelpView::XpressiveHelpView():QTextEdit(s_helpText)
 {
-
-#if QT_VERSION < 0x50C00
-	// Workaround for a bug in Qt versions below 5.12,
-	// where argument-dependent-lookup fails for QFlags operators
-	// declared inside a namespace.
-	// This affects the Q_DECLARE_OPERATORS_FOR_FLAGS macro in Instrument.h
-	// See also: https://codereview.qt-project.org/c/qt/qtbase/+/225348
-
-	using ::operator|;
-
-#endif
-
 	setWindowTitle ( "Xpressive Help" );
 	setTextInteractionFlags ( Qt::TextSelectableByKeyboard | Qt::TextSelectableByMouse );
 	getGUI()->mainWindow()->addWindowedWidget( this );