Remove remaining Qt 4 stuff

For reference: https://wiki.qt.io/Transition_from_Qt_4.x_to_Qt5

37 files changed, 23 insertions, 535 deletions

diff --git a/src/Connection.h b/src/Connection.h
index a431315a2..9bc24ab05 100644
--- a/src/Connection.h
+++ b/src/Connection.h
@@ -36,11 +36,7 @@ class Connection : public QObject {
 		Q_DISABLE_COPY(Connection)
 	protected:
 		QSslSocket *qtsSocket;
-#if QT_VERSION >= 0x040700
 		QElapsedTimer qtLastPacket;
-#else
-		QTime qtLastPacket;
-#endif
 		unsigned int uiType;
 		int iPacketLength;
 #ifdef Q_OS_WIN
@@ -94,8 +90,4 @@ class Connection : public QObject {
 #endif
 };
 
-#if QT_VERSION < 0x050000
-Q_DECLARE_METATYPE(QAbstractSocket::SocketError)
-#endif
-
 #endif
diff --git a/src/SSL.cpp b/src/SSL.cpp
index 6b803204b..c7d9ed145 100644
--- a/src/SSL.cpp
+++ b/src/SSL.cpp
@@ -108,120 +108,7 @@ out:
 }
 
 void MumbleSSL::addSystemCA() {
-#if QT_VERSION < 0x040700 && !defined(NO_SYSTEM_CA_OVERRIDE)
-#if defined(Q_OS_WIN)
-	QStringList qsl;
-	qsl << QLatin1String("Ca");
-	qsl << QLatin1String("Root");
-	qsl << QLatin1String("AuthRoot");
-	foreach(const QString &store, qsl) {
-		HCERTSTORE hCertStore;
-		PCCERT_CONTEXT pCertContext = NULL;
-
-		bool found = false;
-
-		hCertStore = CertOpenSystemStore(NULL, store.utf16());
-		if (! hCertStore) {
-			qWarning("SSL: Failed to open CA store %s", qPrintable(store));
-			continue;
-		}
-
-		while (pCertContext = CertEnumCertificatesInStore(hCertStore, pCertContext)) {
-			QByteArray qba(reinterpret_cast<const char *>(pCertContext->pbCertEncoded), pCertContext->cbCertEncoded);
-
-			QList<QSslCertificate> ql = QSslCertificate::fromData(qba, QSsl::Pem);
-			ql += QSslCertificate::fromData(qba, QSsl::Der);
-			if (! ql.isEmpty()) {
-				found = true;
-				QSslSocket::addDefaultCaCertificates(ql);
-			}
-		}
-		if (found)
-			qWarning("SSL: Added CA certificates from system store '%s'", qPrintable(store));
-
-		CertCloseStore(hCertStore, 0);
-	}
-
-#elif defined(Q_OS_MAC)
-	CFArrayRef certs = NULL;
-	bool found = false;
-
-	if (SecTrustCopyAnchorCertificates(&certs) == noErr) {
-		int ncerts = CFArrayGetCount(certs);
-		for (int i = 0; i < ncerts; i++) {
-			CFDataRef data = NULL;
-
-			SecCertificateRef cert = reinterpret_cast<SecCertificateRef>(const_cast<void *>(CFArrayGetValueAtIndex(certs, i)));
-			if (! cert)
-				continue;
-
-			if (SecKeychainItemExport(cert, kSecFormatX509Cert, kSecItemPemArmour, NULL, &data) == noErr) {
-				const char *ptr = reinterpret_cast<const char *>(CFDataGetBytePtr(data));
-				int len = CFDataGetLength(data);
-				QByteArray qba(ptr, len);
-
-				QList<QSslCertificate> ql = QSslCertificate::fromData(qba, QSsl::Pem);
-				if (! ql.isEmpty()) {
-					found = true;
-					QSslSocket::addDefaultCaCertificates(ql);
-				}
-			}
-		}
-
-		CFRelease(certs);
-
-		if (found)
-			qWarning("SSL: Added CA certificates from 'System Roots' store.");
-	}
-#elif defined(Q_OS_UNIX)
-	QStringList qsl;
-
-#ifdef SYSTEM_CA_DIR
-	QSslSocket::addDefaultCaCertificates(QLatin1String(MUMTEXT(SYSTEM_CA_DIR)));
-#else
-#ifdef SYSTEM_CA_BUNDLE
-	qsl << QLatin1String(MUMTEXT(SYSTEM_CA_BUNDLE));
-#else
-#ifdef __FreeBSD__
-	qsl << QLatin1String("/usr/local/share/certs/ca-root-nss.crt");
-#else
-	qsl << QLatin1String("/etc/pki/tls/certs/ca-bundle.crt");
-	qsl << QLatin1String("/etc/ssl/certs/ca-certificates.crt");
-#endif
-#endif
-
-	foreach(const QString &filename, qsl) {
-		QFile f(filename);
-		if (f.exists() && f.open(QIODevice::ReadOnly)) {
-			QList<QSslCertificate> ql = QSslCertificate::fromDevice(&f, QSsl::Pem);
-			ql += QSslCertificate::fromDevice(&f, QSsl::Der);
-			if (! ql.isEmpty()) {
-				qWarning("SSL: Added CA certificates from '%s'", qPrintable(filename));
-				QSslSocket::addDefaultCaCertificates(ql);
-			}
-		}
-	}
-#endif // SYSTEM_CA_DIR
-#endif // Q_OS_UNIX
-
-	QSet<QByteArray> digests;
-	QList<QSslCertificate> ql;
-	foreach(const QSslCertificate &crt, QSslSocket::defaultCaCertificates()) {
-		QByteArray digest = crt.digest(QCryptographicHash::Sha1);
-		if (! digests.contains(digest) && crt.isValid()) {
-			ql << crt;
-			digests.insert(digest);
-		}
-	}
-	QSslSocket::setDefaultCaCertificates(ql);
-#endif // NO_SYSTEM_CA_OVERRIDE
-
-	// Don't perform on-demand loading of root certificates
-#if QT_VERSION >= 0x050500
 	QSslSocket::addDefaultCaCertificates(QSslConfiguration::systemCaCertificates());
-#elif QT_VERSION >= 0x040800
-	QSslSocket::addDefaultCaCertificates(QSslSocket::systemCaCertificates());
-#endif
 
 #ifdef Q_OS_WIN
 	// Work around issue #1271.
@@ -233,7 +120,6 @@ void MumbleSSL::addSystemCA() {
 
 		QList<QSslCertificate> filteredCaList;
 		foreach (QSslCertificate cert, caList) {
-#if QT_VERSION >= 0x050000
 			QStringList orgs = cert.subjectInfo(QSslCertificate::Organization);
 			bool skip = false;
 			foreach (QString ou, orgs) {
@@ -245,12 +131,7 @@ void MumbleSSL::addSystemCA() {
 			if (skip) {
 				continue;
 			}
-#else
-			QString ou = cert.subjectInfo(QSslCertificate::Organization);
-			if (ou.contains(QLatin1String("Skype"), Qt::CaseInsensitive)) {
-				continue;
-			}
-#endif
+
 			filteredCaList.append(cert);
 		}
 
@@ -266,21 +147,15 @@ QString MumbleSSL::protocolToString(QSsl::SslProtocol protocol) {
 	switch(protocol) {
 		case QSsl::SslV3: return QLatin1String("SSL 3");
 		case QSsl::SslV2: return QLatin1String("SSL 2");
-#if QT_VERSION >= 0x050000
 		case QSsl::TlsV1_0: return QLatin1String("TLS 1.0");
 		case QSsl::TlsV1_1: return QLatin1String("TLS 1.1");
 		case QSsl::TlsV1_2: return QLatin1String("TLS 1.2");
 #if QT_VERSION >= 0x050C00
 		case QSsl::TlsV1_3: return QLatin1String("TLS 1.3");
 #endif
-#else
-		case QSsl::TlsV1: return  QLatin1String("TLS 1.0");
-#endif
 		case QSsl::AnyProtocol: return QLatin1String("AnyProtocol");
-#if QT_VERSION >= 0x040800
 		case QSsl::TlsV1SslV3: return QLatin1String("TlsV1SslV3");
 		case QSsl::SecureProtocols: return QLatin1String("SecureProtocols");
-#endif
 		default:
 		case QSsl::UnknownProtocol: return QLatin1String("UnknownProtocol");
 	}
diff --git a/src/mumble/Cert.cpp b/src/mumble/Cert.cpp
index a5072cdac..f07dcda47 100644
--- a/src/mumble/Cert.cpp
+++ b/src/mumble/Cert.cpp
@@ -79,7 +79,6 @@ void CertView::setCert(const QList<QSslCertificate> &cert) {
 	} else {
 		QSslCertificate qscCert = qlCert.at(0);
 
-#if QT_VERSION >= 0x050000
 		const QStringList &names = qscCert.subjectInfo(QSslCertificate::CommonName);
 		QString name;
 		if (names.count() > 0) {
@@ -87,10 +86,6 @@ void CertView::setCert(const QList<QSslCertificate> &cert) {
 		}
 
 		QStringList emails = qscCert.subjectAlternativeNames().values(QSsl::EmailEntry);
-#else
-		const QString &name = qscCert.subjectInfo(QSslCertificate::CommonName);
-		QStringList emails(qscCert.alternateSubjectNames().values(QSsl::EmailEntry));
-#endif
 
 		QString tmpName = name;
 		tmpName = tmpName.replace(QLatin1String("\\x"), QLatin1String("%"));
@@ -111,15 +106,12 @@ void CertView::setCert(const QList<QSslCertificate> &cert) {
 		if (qlCert.count() > 1)
 			qscCert = qlCert.last();
 
-#if QT_VERSION >= 0x050000
 		const QStringList &issuerNames = qscCert.issuerInfo(QSslCertificate::CommonName);
 		QString issuerName;
 		if (issuerNames.count() > 0) {
 			issuerName = issuerNames.at(0);
 		}
-#else
-		const QString &issuerName = qscCert.issuerInfo(QSslCertificate::CommonName);
-#endif
+
 		qlIssuerName->setText((issuerName == name) ? tr("Self-signed") : issuerName);
 	}
 }
diff --git a/src/mumble/ConnectDialog.cpp b/src/mumble/ConnectDialog.cpp
index c8fb49404..56adf2c75 100644
--- a/src/mumble/ConnectDialog.cpp
+++ b/src/mumble/ConnectDialog.cpp
@@ -415,16 +415,10 @@ ServerItem *ServerItem::fromMimeData(const QMimeData *mime, bool default_name, Q
 	}
 
 	if (default_name) {
-#if QT_VERSION >= 0x050000
 		QUrlQuery query(url);
 		if (! query.hasQueryItem(QLatin1String("title"))) {
 			query.addQueryItem(QLatin1String("title"), url.host());
 		}
-#else
-		if (! url.hasQueryItem(QLatin1String("title"))) {
-			url.addQueryItem(QLatin1String("title"), url.host());
-		}
-#endif
 	}
 
 	if (! url.isValid()) {
@@ -454,9 +448,7 @@ ServerItem *ServerItem::fromUrl(QUrl url, QWidget *p) {
 		return NULL;
 	}
 
-#if QT_VERSION >= 0x050000
 	QUrlQuery query(url);
-#endif
 
 	if (url.userName().isEmpty()) {
 		if (g.s.qsUsername.isEmpty()) {
@@ -471,17 +463,10 @@ ServerItem *ServerItem::fromUrl(QUrl url, QWidget *p) {
 		url.setUserName(g.s.qsUsername);
 	}
 
-#if QT_VERSION >= 0x050000
 	ServerItem *si = new ServerItem(query.queryItemValue(QLatin1String("title")), url.host(), static_cast<unsigned short>(url.port(DEFAULT_MUMBLE_PORT)), url.userName(), url.password());
 
 	if (query.hasQueryItem(QLatin1String("url")))
 		si->qsUrl = query.queryItemValue(QLatin1String("url"));
-#else
-	ServerItem *si = new ServerItem(url.queryItemValue(QLatin1String("title")), url.host(), static_cast<unsigned short>(url.port(DEFAULT_MUMBLE_PORT)), url.userName(), url.password());
-
-	if (url.hasQueryItem(QLatin1String("url")))
-		si->qsUrl = url.queryItemValue(QLatin1String("url"));
-#endif
 
 	return si;
 }
@@ -672,15 +657,10 @@ QMimeData *ServerItem::toMimeData(const QString &name, const QString &host, unsi
 		url.setPort(port);
 	url.setPath(channel);
 
-#if QT_VERSION >= 0x050000
 	QUrlQuery query;
 	query.addQueryItem(QLatin1String("title"), name);
 	query.addQueryItem(QLatin1String("version"), QLatin1String("1.2.0"));
 	url.setQuery(query);
-#else
-	url.addQueryItem(QLatin1String("title"), name);
-	url.addQueryItem(QLatin1String("version"), QLatin1String("1.2.0"));
-#endif
 
 	QString qs = QLatin1String(url.toEncoded());
 
@@ -1012,7 +992,6 @@ ConnectDialog::ConnectDialog(QWidget *p, bool autoconnect) : QDialog(p), bAutoCo
 
 	qtwServers->sortItems(1, Qt::AscendingOrder);
 
-#if QT_VERSION >= 0x050000
 	qtwServers->header()->setSectionResizeMode(0, QHeaderView::Stretch);
 	if (qtwServers->columnCount() >= 2) {
 		qtwServers->header()->setSectionResizeMode(1, QHeaderView::ResizeToContents);
@@ -1020,15 +999,6 @@ ConnectDialog::ConnectDialog(QWidget *p, bool autoconnect) : QDialog(p), bAutoCo
 	if (qtwServers->columnCount() >= 3) {
 		qtwServers->header()->setSectionResizeMode(2, QHeaderView::ResizeToContents);
 	}
-#else
-	qtwServers->header()->setResizeMode(0, QHeaderView::Stretch);
-	if (qtwServers->columnCount() >= 2) {
-		qtwServers->header()->setResizeMode(1, QHeaderView::ResizeToContents);
-	}
-	if (qtwServers->columnCount() >= 3) {
-		qtwServers->header()->setResizeMode(2, QHeaderView::ResizeToContents);
-	}
-#endif
 
 	connect(qtwServers->header(), SIGNAL(sortIndicatorChanged(int, Qt::SortOrder)), this, SLOT(OnSortChanged(int, Qt::SortOrder)));
 
@@ -1380,13 +1350,10 @@ void ConnectDialog::initList() {
 
 	QUrl url;
 	url.setPath(QLatin1String("/v1/list"));
-#if QT_VERSION >= 0x050000
+
 	QUrlQuery query;
 	query.addQueryItem(QLatin1String("version"), QLatin1String(MUMTEXT(MUMBLE_VERSION_STRING)));
 	url.setQuery(query);
-#else
-	url.addQueryItem(QLatin1String("version"), QLatin1String(MUMTEXT(MUMBLE_VERSION_STRING)));
-#endif
 
 	WebFetch::fetch(QLatin1String("publist"), url, this, SLOT(fetched(QByteArray,QUrl,QMap<QString,QString>)));
 }
diff --git a/src/mumble/DBus.cpp b/src/mumble/DBus.cpp
index 646be653d..108797e71 100644
--- a/src/mumble/DBus.cpp
+++ b/src/mumble/DBus.cpp
@@ -46,13 +46,9 @@ void MumbleDBus::getCurrentUrl(const QDBusMessage &msg) {
 	u.setPort(port);
 	u.setUserName(user);
 
-#if QT_VERSION >= 0x050000
 	QUrlQuery query;
 	query.addQueryItem(QLatin1String("version"), QLatin1String("1.2.0"));
 	u.setQuery(query);
-#else
-	u.addQueryItem(QLatin1String("version"), QLatin1String("1.2.0"));
-#endif
 
 	QStringList path;
 	Channel *c = ClientUser::get(g.uiSession)->cChannel;
diff --git a/src/mumble/Database.cpp b/src/mumble/Database.cpp
index d89e268cd..da2ef6f34 100644
--- a/src/mumble/Database.cpp
+++ b/src/mumble/Database.cpp
@@ -47,11 +47,7 @@ Database::Database(const QString &dbname) {
 	int i;
 
 	datapaths << g.qdBasePath.absolutePath();
-#if QT_VERSION >= 0x050000
 	datapaths << QStandardPaths::writableLocation(QStandardPaths::DataLocation);
-#else
-	datapaths << QDesktopServices::storageLocation(QDesktopServices::DataLocation);
-#endif
 #if defined(Q_OS_UNIX) && ! defined(Q_OS_MAC)
 	datapaths << QDir::homePath() + QLatin1String("/.config/Mumble");
 #endif
diff --git a/src/mumble/Global.cpp b/src/mumble/Global.cpp
index 41ec60e17..f3b82aa85 100644
--- a/src/mumble/Global.cpp
+++ b/src/mumble/Global.cpp
@@ -20,11 +20,7 @@ Global *Global::g_global_struct;
 static void migrateDataDir() {
 #ifdef Q_OS_MAC
 	QString olddir = QDir::homePath() + QLatin1String("/Library/Preferences/Mumble");
-#if QT_VERSION >= 0x050000
 	QString newdir = QStandardPaths::writableLocation(QStandardPaths::DataLocation);
-#else
-	QString newdir = QDesktopServices::storageLocation(QDesktopServices::DataLocation);
-#endif // QT_VERSION
 	QString linksTo = QFile::symLinkTarget(olddir);
 	if (!QFile::exists(newdir) && QFile::exists(olddir) && linksTo.isEmpty()) {
 		QDir d;
@@ -49,7 +45,6 @@ static void migrateDataDir() {
 // Qt4 used another data directory on Unix-like systems, to ensure a seamless
 // transition we must first move the users data to the new directory.
 #if defined(Q_OS_UNIX) && ! defined(Q_OS_MAC)
-#if QT_VERSION >= 0x050000
 	QString olddir = QStandardPaths::writableLocation(QStandardPaths::GenericDataLocation) + QLatin1String("/data/Mumble");
 	QString newdir = QStandardPaths::writableLocation(QStandardPaths::GenericDataLocation) + QLatin1String("/Mumble");
 
@@ -66,7 +61,6 @@ static void migrateDataDir() {
 	}
 
 	qWarning("Application data migration failed.");
-#endif // QT_VERSION
 #endif // defined(Q_OS_UNIX) && ! defined(Q_OS_MAC)
 }
 #endif // Q_OS_WIN
@@ -121,11 +115,8 @@ Global::Global() {
 
 	QStringList qsl;
 	qsl << QCoreApplication::instance()->applicationDirPath();
-#if QT_VERSION >= 0x050000
 	qsl << QStandardPaths::writableLocation(QStandardPaths::DataLocation);
-#else
-	qsl << QDesktopServices::storageLocation(QDesktopServices::DataLocation);
-#endif
+
 #if defined(Q_OS_WIN)
 	QString appdata;
 	wchar_t appData[MAX_PATH];
@@ -155,11 +146,7 @@ Global::Global() {
 			qdBasePath.setPath(appdata);
 #else
 		migrateDataDir();
-#if QT_VERSION >= 0x050000
 		qdBasePath.setPath(QStandardPaths::writableLocation(QStandardPaths::DataLocation));
-#else
-		qdBasePath.setPath(QDesktopServices::storageLocation(QDesktopServices::DataLocation));
-#endif
 #endif
 		if (! qdBasePath.exists()) {
 			QDir::root().mkpath(qdBasePath.absolutePath());
diff --git a/src/mumble/GlobalShortcut.cpp b/src/mumble/GlobalShortcut.cpp
index 26c5b5e19..6272285da 100644
--- a/src/mumble/GlobalShortcut.cpp
+++ b/src/mumble/GlobalShortcut.cpp
@@ -529,20 +529,11 @@ GlobalShortcutConfig::GlobalShortcutConfig(Settings &st) : ConfigWidget(st) {
 	qtwShortcuts->setColumnCount(canSuppress ? 4 : 3);
 	qtwShortcuts->setItemDelegate(new ShortcutDelegate(qtwShortcuts));
 
-#if QT_VERSION >= 0x050000
 	qtwShortcuts->header()->setSectionResizeMode(0, QHeaderView::Fixed);
 	qtwShortcuts->header()->resizeSection(0, 150);
 	qtwShortcuts->header()->setSectionResizeMode(2, QHeaderView::Stretch);
 	if (canSuppress)
 		qtwShortcuts->header()->setSectionResizeMode(3, QHeaderView::ResizeToContents);
-#else
-	qtwShortcuts->header()->setResizeMode(0, QHeaderView::Fixed);
-	qtwShortcuts->header()->resizeSection(0, 150);
-	qtwShortcuts->header()->setResizeMode(2, QHeaderView::Stretch);
-	if (canSuppress)
-		qtwShortcuts->header()->setResizeMode(3, QHeaderView::ResizeToContents);
-#endif
-
 
 	qcbEnableGlobalShortcuts->setVisible(canDisable);
 
diff --git a/src/mumble/Log.cpp b/src/mumble/Log.cpp
index 85d417d60..3e39be694 100644
--- a/src/mumble/Log.cpp
+++ b/src/mumble/Log.cpp
@@ -39,21 +39,12 @@ LogConfig::LogConfig(Settings &st) : ConfigWidget(st) {
 	qgbTTS->setDisabled(true);
 #endif
 
-#if QT_VERSION >= 0x050000
 	qtwMessages->header()->setSectionResizeMode(ColMessage, QHeaderView::Stretch);
 	qtwMessages->header()->setSectionResizeMode(ColConsole, QHeaderView::ResizeToContents);
 	qtwMessages->header()->setSectionResizeMode(ColNotification, QHeaderView::ResizeToContents);
 	qtwMessages->header()->setSectionResizeMode(ColHighlight, QHeaderView::ResizeToContents);
 	qtwMessages->header()->setSectionResizeMode(ColTTS, QHeaderView::ResizeToContents);
 	qtwMessages->header()->setSectionResizeMode(ColStaticSound, QHeaderView::ResizeToContents);
-#else
-	qtwMessages->header()->setResizeMode(ColMessage, QHeaderView::Stretch);
-	qtwMessages->header()->setResizeMode(ColConsole, QHeaderView::ResizeToContents);
-	qtwMessages->header()->setResizeMode(ColNotification, QHeaderView::ResizeToContents);
-	qtwMessages->header()->setResizeMode(ColHighlight, QHeaderView::ResizeToContents);
-	qtwMessages->header()->setResizeMode(ColTTS, QHeaderView::ResizeToContents);
-	qtwMessages->header()->setResizeMode(ColStaticSound, QHeaderView::ResizeToContents);
-#endif
 
 	QTreeWidgetItem *twi;
 	for (int i = Log::firstMsgType; i <= Log::lastMsgType; ++i) {
diff --git a/src/mumble/MainWindow.cpp b/src/mumble/MainWindow.cpp
index a363673be..5459778d7 100644
--- a/src/mumble/MainWindow.cpp
+++ b/src/mumble/MainWindow.cpp
@@ -135,11 +135,6 @@ MainWindow::MainWindow(QWidget *p) : QMainWindow(p) {
 
 	qwPTTButtonWidget = NULL;
 
-#if QT_VERSION < 0x050000
-	cuContextUser = QWeakPointer<ClientUser>();
-	cContextChannel = QWeakPointer<Channel>();
-#endif
-
 	qtReconnect = new QTimer(this);
 	qtReconnect->setInterval(10000);
 	qtReconnect->setSingleShot(true);
@@ -356,9 +351,7 @@ void MainWindow::setupGui()  {
 
 	updateTransmitModeComboBox();
 
-// For Qt >= 5, enable this call (only) for Windows.
-// For Qt < 5, enable for anything but macOS.
-#if (QT_VERSION >= 0x050000 && defined(Q_OS_WIN)) || (QT_VERSION < 0x050000 && !defined(Q_OS_MAC))
+#ifdef Q_OS_WIN
 	setupView(false);
 #endif
 
@@ -383,12 +376,6 @@ void MainWindow::setupGui()  {
 
 #ifdef Q_OS_MAC
 	setWindowOpacity(1.0f);
-#if QT_VERSION < 0x040700
-	// Process pending events.  This is done to force the unified
-	// toolbar to show up as soon as possible (and not wait until
-	// we are back into the Cocoa mainloop)
-	qApp->processEvents();
-#endif
 #endif
 }
 
@@ -437,12 +424,8 @@ void MainWindow::msgBox(QString msg) {
 }
 
 #ifdef Q_OS_WIN
-#if QT_VERSION >= 0x050000
 bool MainWindow::nativeEvent(const QByteArray &, void *message, long *) {
 	MSG *msg = reinterpret_cast<MSG *>(message);
-#else
-bool MainWindow::winEvent(MSG *msg, long *) {
-#endif
 	if (msg->message == WM_DEVICECHANGE && msg->wParam == DBT_DEVNODES_CHANGED)
 		uiNewHardware++;
 
@@ -801,11 +784,7 @@ void MainWindow::saveImageAs() {
 
 QString MainWindow::getImagePath(QString filename) const {
 	if (g.s.qsImagePath.isEmpty() || ! QDir(g.s.qsImagePath).exists()) {
-#if QT_VERSION >= 0x050000
 		g.s.qsImagePath = QStandardPaths::writableLocation(QStandardPaths::PicturesLocation);
-#else
-		g.s.qsImagePath = QDesktopServices::storageLocation(QDesktopServices::PicturesLocation);
-#endif
 	}
 	if (filename.isEmpty()) {
 		return g.s.qsImagePath;
@@ -878,12 +857,8 @@ void MainWindow::openUrl(const QUrl &url) {
 	minor = 2;
 	patch = 0;
 
-#if QT_VERSION >= 0x050000
 	QUrlQuery query(url);
 	QString version = query.queryItemValue(QLatin1String("version"));
-#else
-	QString version = url.queryItemValue(QLatin1String("version"));
-#endif
 	MumbleVersion::get(&major, &minor, &patch, version);
 
 	if ((major < 1) || // No pre 1.2.0
@@ -902,13 +877,8 @@ void MainWindow::openUrl(const QUrl &url) {
 	qsDesiredChannel = url.path();
 	QString name;
 
-#if QT_VERSION >= 0x050000
 	if (query.hasQueryItem(QLatin1String("title")))
 		name = query.queryItemValue(QLatin1String("title"));
-#else
-	if (url.hasQueryItem(QLatin1String("title")))
-		name = url.queryItemValue(QLatin1String("title"));
-#endif
 
 	if (g.sh && g.sh->isRunning()) {
 		QString oHost, oUser, oPw;
diff --git a/src/mumble/MainWindow.h b/src/mumble/MainWindow.h
index 661d0b668..ae8de533d 100644
--- a/src/mumble/MainWindow.h
+++ b/src/mumble/MainWindow.h
@@ -94,13 +94,8 @@ class MainWindow : public QMainWindow, public MessageHandler, public Ui::MainWin
 		/// save when activating the "Save Image As..." context menu item.
 		QTextCursor qtcSaveImageCursor;
 
-#if QT_VERSION >= 0x050000
 		QPointer<Channel> cContextChannel;
 		QPointer<ClientUser> cuContextUser;
-#else
-		QWeakPointer<Channel> cContextChannel;
-		QWeakPointer<ClientUser> cuContextUser;
-#endif
 
 		QPoint qpContextPosition;
 
@@ -119,11 +114,7 @@ class MainWindow : public QMainWindow, public MessageHandler, public Ui::MainWin
 		void openUserLocalVolumeDialog(ClientUser *p);
 
 #ifdef Q_OS_WIN
-#if QT_VERSION >= 0x050000
 		bool nativeEvent(const QByteArray &eventType, void *message, long *result) Q_DECL_OVERRIDE;
-#else
-		bool winEvent(MSG *, long *) Q_DECL_OVERRIDE;
-#endif
 		unsigned int uiNewHardware;
 #endif
 	protected:
diff --git a/src/mumble/MumbleApplication.cpp b/src/mumble/MumbleApplication.cpp
index c338fc805..e90f0ec8d 100644
--- a/src/mumble/MumbleApplication.cpp
+++ b/src/mumble/MumbleApplication.cpp
@@ -91,7 +91,6 @@ static bool gswForward(MSG *msg) {
 	return false;
 }
 
-# if QT_VERSION >= 0x050000
 bool MumbleApplication::nativeEventFilter(const QByteArray &, void *message, long *) {
 	MSG *msg = reinterpret_cast<MSG *>(message);
 	if (QThread::currentThread() == thread()) {
@@ -102,15 +101,4 @@ bool MumbleApplication::nativeEventFilter(const QByteArray &, void *message, lon
 	}
 	return false;
 }
-# else
-bool MumbleApplication::winEventFilter(MSG *msg, long *result) {
-	if (QThread::currentThread() == thread()) {
-		bool suppress = gswForward(msg);
-		if (suppress) {
-			return true;
-		}
-	}
-	return QApplication::winEventFilter(msg, result);
-}
-# endif
 #endif
diff --git a/src/mumble/MumbleApplication.h b/src/mumble/MumbleApplication.h
index a67f62f61..cfe5a3031 100644
--- a/src/mumble/MumbleApplication.h
+++ b/src/mumble/MumbleApplication.h
@@ -9,14 +9,14 @@
 #include <QApplication>
 #include <QUrl>
 
-#if QT_VERSION >= 0x050000 && defined(Q_OS_WIN)
-# include <QAbstractNativeEventFilter>
+#ifdef Q_OS_WIN
+#include <QAbstractNativeEventFilter>
 #endif
 
 /**
  * @brief Implements custom system shutdown behavior as well as event filtering.
  */
-#if QT_VERSION >= 0x050000 && defined(Q_OS_WIN)
+#ifdef Q_OS_WIN
 class MumbleApplication : public QApplication, public QAbstractNativeEventFilter {
 #else
 class MumbleApplication : public QApplication {
@@ -50,11 +50,7 @@ class MumbleApplication : public QApplication {
 
 		bool event(QEvent *e) Q_DECL_OVERRIDE;
 #ifdef Q_OS_WIN
-# if QT_VERSION >= 0x050000
 		bool nativeEventFilter(const QByteArray &eventType, void *message, long *result) Q_DECL_OVERRIDE;
-# else
-		bool winEventFilter(MSG *msg, long *result) Q_DECL_OVERRIDE;
-# endif
 #endif
 		
 		QUrl quLaunchURL;
diff --git a/src/mumble/Overlay.cpp b/src/mumble/Overlay.cpp
index df960d3b7..2b47db766 100644
--- a/src/mumble/Overlay.cpp
+++ b/src/mumble/Overlay.cpp
@@ -141,12 +141,8 @@ OverlayAppInfo OverlayAppInfo::applicationInfoForId(const QString &identifier) {
 	HINSTANCE qWinAppInstValue = GetModuleHandle(NULL);
 	HICON icon = ExtractIcon(qWinAppInstValue, identifier.toStdWString().c_str(), 0);
 	if (icon) {
-#if QT_VERSION >= 0x050000
 		extern QPixmap qt_pixmapFromWinHICON(HICON icon);
 		qiAppIcon = QIcon(qt_pixmapFromWinHICON(icon));
-#else
-		qiAppIcon = QIcon(QPixmap::fromWinHICON(icon));
-#endif
 		DestroyIcon(icon);
 	}
 #endif
diff --git a/src/mumble/OverlayClient.cpp b/src/mumble/OverlayClient.cpp
index 735d6c88e..bd369edd9 100644
--- a/src/mumble/OverlayClient.cpp
+++ b/src/mumble/OverlayClient.cpp
@@ -137,19 +137,11 @@ void OverlayClient::updateMouse() {
 	QPixmap pm;
 
 	HICON c = ::GetCursor();
-#if QT_VERSION < 0x050000
-	if (c == NULL)
-		c = qgv.viewport()->cursor().handle();
-#endif
-
 	ICONINFO info;
 	ZeroMemory(&info, sizeof(info));
 	if (c != NULL && ::GetIconInfo(c, &info)) {
-#if QT_VERSION >= 0x050000
 		extern QPixmap qt_pixmapFromWinHBITMAP(HBITMAP bitmap, int format = 0);
-#else
-# define qt_pixmapFromWinHBITMAP(bmp) QPixmap::fromWinHBITMAP(bmp)
-#endif
+
 		if (info.hbmColor) {
 			pm = qt_pixmapFromWinHBITMAP(info.hbmColor);
 			pm.setMask(QBitmap(qt_pixmapFromWinHBITMAP(info.hbmMask)));
@@ -195,19 +187,11 @@ void OverlayClient::updateMouse() {
 }
 #endif
 
-#if QT_VERSION < 0x050000 && (defined(Q_OS_WIN) || defined(Q_OS_MAC))
-extern bool Q_GUI_EXPORT qt_use_native_dialogs;
-#endif
-
 // Qt gets very very unhappy if we embed or unmbed the widget that an event is called from.
 // This means that if any modal dialog is open, we'll be in a event loop of an object
 // that we're about to reparent.
 
 void OverlayClient::showGui() {
-#if defined(QT3_SUPPORT) || (defined(Q_OS_WIN) && QT_VERSION < 0x050000)
-	if (QCoreApplication::loopLevel() > 1)
-		return;
-#else
 	int count = 0;
 
 	{
@@ -221,7 +205,6 @@ void OverlayClient::showGui() {
 	// If there's more than one window up, we're likely deep in a message loop.
 	if (count > 1)
 		return;
-#endif
 
 	g.ocIntercept = this;
 
@@ -294,10 +277,6 @@ outer:
 
 	setupScene(true);
 
-#if QT_VERSION < 0x050000 && (defined(Q_OS_WIN) || defined(Q_OS_MAC))
-	qt_use_native_dialogs = false;
-#endif
-
 	OverlayMsg om;
 	om.omh.uiMagic = OVERLAY_MAGIC_NUMBER;
 	om.omh.uiType = OVERLAY_MSGTYPE_INTERACTIVE;
@@ -309,14 +288,6 @@ outer:
 }
 
 void OverlayClient::hideGui() {
-#if defined(QT3_SUPPORT) || (defined(Q_OS_WIN) && QT_VERSION < 0x050000)
-	if (QCoreApplication::loopLevel() > 1) {
-		QCoreApplication::exit_loop();
-		QMetaObject::invokeMethod(this, "hideGui", Qt::QueuedConnection);
-		return;
-	}
-#endif
-
 	ougUsers.bShowExamples = false;
 
 	QList<QWidget *> widgetlist;
@@ -367,9 +338,6 @@ void OverlayClient::hideGui() {
 	setupScene(false);
 
 	qgv.setAttribute(Qt::WA_WState_Hidden, true);
-#if QT_VERSION < 0x050000 && (defined(Q_OS_WIN) || defined(Q_OS_MAC))
-	qt_use_native_dialogs = true;
-#endif
 
 	OverlayMsg om;
 	om.omh.uiMagic = OVERLAY_MAGIC_NUMBER;
diff --git a/src/mumble/Overlay_macx.mm b/src/mumble/Overlay_macx.mm
index 0f1994692..9aca57298 100644
--- a/src/mumble/Overlay_macx.mm
+++ b/src/mumble/Overlay_macx.mm
@@ -212,13 +212,6 @@ void OverlayClient::updateMouse() {
 				cgimg = [(NSBitmapImageRep *)rep CGImage];
 			}
 		}
-
-#if QT_VERSION < 0x050000
-		if (cgimg) {
-			pm = QPixmap::fromMacCGImageRef(cgimg);
-			qmCursors.insert(csShape, pm);
-		}
-#endif
 	}
 
 	NSPoint p = [cursor hotSpot];
diff --git a/src/mumble/Plugins.cpp b/src/mumble/Plugins.cpp
index 450e2649c..1addf2643 100644
--- a/src/mumble/Plugins.cpp
+++ b/src/mumble/Plugins.cpp
@@ -73,13 +73,8 @@ struct PluginFetchMeta {
 PluginConfig::PluginConfig(Settings &st) : ConfigWidget(st) {
 	setupUi(this);
 
-#if QT_VERSION >= 0x050000
 	qtwPlugins->header()->setSectionResizeMode(0, QHeaderView::Stretch);
 	qtwPlugins->header()->setSectionResizeMode(1, QHeaderView::ResizeToContents);
-#else
-	qtwPlugins->header()->setResizeMode(0, QHeaderView::Stretch);
-	qtwPlugins->header()->setResizeMode(1, QHeaderView::ResizeToContents);
-#endif
 
 	refillPluginList();
 }
@@ -586,16 +581,10 @@ void Plugins::checkUpdates() {
 
 
 #ifdef QT_NO_DEBUG
-#if QT_VERSION >= 0x050000
 	QUrlQuery query;
 	query.setQueryItems(queryItems);
 	url.setQuery(query);
-#else
-	for (int i = 0; i < queryItems.size(); i++) {
-		const QPair<QString, QString> &queryPair = queryItems.at(i);
-		url.addQueryItem(queryPair.first, queryPair.second);
-	}
-#endif
+
 	WebFetch::fetch(QLatin1String("update"), url, this, SLOT(fetchedUpdatePAPlugins(QByteArray,QUrl)));
 #else
 	g.mw->msgBox(tr("Skipping plugin update in debug mode."));
diff --git a/src/mumble/ServerHandler.cpp b/src/mumble/ServerHandler.cpp
index 6498e1391..b5606acef 100644
--- a/src/mumble/ServerHandler.cpp
+++ b/src/mumble/ServerHandler.cpp
@@ -379,11 +379,10 @@ void ServerHandler::run() {
 		// In Qt 5.4, QSsl::SecureProtocols is equivalent
 		// to "TLSv1.0 or later", which we require.
 		qtsSock->setProtocol(QSsl::SecureProtocols);
-	#elif QT_VERSION >= 0x050000
-		qtsSock->setProtocol(QSsl::TlsV1_0);
 	#else
-		qtsSock->setProtocol(QSsl::TlsV1);
+		qtsSock->setProtocol(QSsl::TlsV1_0);
 	#endif
+
 		qtsSock->connectToHost(saTargetServer.host.toAddress(), saTargetServer.port);
 
 		tTimestamp.restart();
diff --git a/src/mumble/Settings.cpp b/src/mumble/Settings.cpp
index 298aab6ee..008bc3e2e 100644
--- a/src/mumble/Settings.cpp
+++ b/src/mumble/Settings.cpp
@@ -282,11 +282,7 @@ Settings::Settings() {
 	bPluginCheck = true;
 #endif
 
-#if QT_VERSION >= 0x050000
 	qsImagePath = QStandardPaths::writableLocation(QStandardPaths::PicturesLocation);
-#else
-	qsImagePath = QDesktopServices::storageLocation(QDesktopServices::PicturesLocation);
-#endif
 
 	ceExpand = ChannelsWithUsers;
 	ceChannelDrag = Ask;
@@ -379,11 +375,7 @@ Settings::Settings() {
 	bHighContrast = false;
 
 	// Recording
-#if QT_VERSION >= 0x050000
 	qsRecordingPath = QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation);
-#else
-	qsRecordingPath = QDesktopServices::storageLocation(QDesktopServices::DocumentsLocation);
-#endif
 	qsRecordingFile = QLatin1String("Mumble-%date-%time-%host-%user");
 	rmRecordingMode = RecordingMixdown;
 	iRecordingFormat = 0;
diff --git a/src/mumble/SocketRPC.cpp b/src/mumble/SocketRPC.cpp
index 8a220b928..86234c5af 100644
--- a/src/mumble/SocketRPC.cpp
+++ b/src/mumble/SocketRPC.cpp
@@ -176,13 +176,9 @@ void SocketRPCClient::processXml() {
 				u.setPort(port);
 				u.setUserName(user);
 
-#if QT_VERSION >= 0x050000
 				QUrlQuery query;
 				query.addQueryItem(QLatin1String("version"), QLatin1String("1.2.0"));
 				u.setQuery(query);
-#else
-				u.addQueryItem(QLatin1String("version"), QLatin1String("1.2.0"));
-#endif
 
 				QStringList path;
 				Channel *c = ClientUser::get(g.uiSession)->cChannel;
diff --git a/src/mumble/TaskList.cpp b/src/mumble/TaskList.cpp
index 58e37dedc..ffde41380 100644
--- a/src/mumble/TaskList.cpp
+++ b/src/mumble/TaskList.cpp
@@ -39,15 +39,10 @@ void TaskList::addToRecentList(QString name, QString user, QString host, int por
 	url.setHost(host);
 	url.setPort(port);
 
-#if QT_VERSION >= 0x050000
 	QUrlQuery query;
 	query.addQueryItem(QLatin1String("title"), name);
 	query.addQueryItem(QLatin1String("version"), QLatin1String("1.2.0"));
 	url.setQuery(query);
-#else
-	url.addQueryItem(QLatin1String("title"), name);
-	url.addQueryItem(QLatin1String("version"), QLatin1String("1.2.0"));
-#endif
 
 	QSettings settings(QLatin1String("HKEY_CLASSES_ROOT"), QSettings::NativeFormat);
 
diff --git a/src/mumble/UserEdit.cpp b/src/mumble/UserEdit.cpp
index d1305dcf9..972bdaf9f 100644
--- a/src/mumble/UserEdit.cpp
+++ b/src/mumble/UserEdit.cpp
@@ -37,20 +37,12 @@ UserEdit::UserEdit(const MumbleProto::UserList &userList, QWidget *p)
 
 	qtvUserList->setFocus();
 	qtvUserList->setContextMenuPolicy(Qt::CustomContextMenu);
-
-#if QT_VERSION >= 0x050000
 	qtvUserList->header()->setSectionResizeMode(UserListModel::COL_NICK, QHeaderView::Stretch);
+
 	if (!m_model->isLegacy()) {
 		qtvUserList->header()->setSectionResizeMode(UserListModel::COL_INACTIVEDAYS, QHeaderView::ResizeToContents);
 		qtvUserList->header()->setSectionResizeMode(UserListModel::COL_LASTCHANNEL, QHeaderView::Stretch);
 	}
-#else
-	qtvUserList->header()->setResizeMode(UserListModel::COL_NICK, QHeaderView::Stretch);
-	if (!m_model->isLegacy()) {
-		qtvUserList->header()->setResizeMode(UserListModel::COL_INACTIVEDAYS, QHeaderView::ResizeToContents);
-		qtvUserList->header()->setResizeMode(UserListModel::COL_LASTCHANNEL, QHeaderView::Stretch);
-	}
-#endif
 
 	if (m_model->isLegacy()) {
 		qlInactive->hide();
diff --git a/src/mumble/UserInformation.cpp b/src/mumble/UserInformation.cpp
index 4fb5d2ce9..c93c7c544 100644
--- a/src/mumble/UserInformation.cpp
+++ b/src/mumble/UserInformation.cpp
@@ -21,14 +21,12 @@ static QString decode_utf8_qssl_string(const QString &input) {
 	return QUrl::fromPercentEncoding(i.replace(QLatin1String("\\x"), QLatin1String("%")).toLatin1());
 }
 
-#if QT_VERSION >= 0x050000
 static QString decode_utf8_qssl_string(const QStringList &list) {
 	if (list.count() > 0) {
 		return decode_utf8_qssl_string(list.at(0));
 	}
 	return QString();
 }
-#endif
 
 UserInformation::UserInformation(const MumbleProto::UserStats &msg, QWidget *p) : QDialog(p) {
 	setupUi(this);
@@ -115,12 +113,7 @@ void UserInformation::update(const MumbleProto::UserStats &msg) {
 			qpbCertificate->setEnabled(true);
 
 			const QSslCertificate &cert = qlCerts.last();
-
-#if QT_VERSION >= 0x050000
 			const QMultiMap<QSsl::AlternativeNameEntryType, QString> &alts = cert.subjectAlternativeNames();
-#else
-			const QMultiMap<QSsl::AlternateNameEntryType, QString> &alts = cert.alternateSubjectNames();
-#endif
 			if (alts.contains(QSsl::EmailEntry))
 				qlCertificate->setText(QStringList(alts.values(QSsl::EmailEntry)).join(tr(", ")));
 			else
diff --git a/src/mumble/UserView.cpp b/src/mumble/UserView.cpp
index fdcd5afd2..121808376 100644
--- a/src/mumble/UserView.cpp
+++ b/src/mumble/UserView.cpp
@@ -41,12 +41,7 @@ void UserDelegate::paint(QPainter * painter, const QStyleOptionViewItem &option,
 
 	painter->save();
 
-#if QT_VERSION >= 0x050000
 	QStyleOptionViewItem o = option;
-#else
-	QStyleOptionViewItemV4 o = option;
-#endif
-
 	initStyleOption(&o, index);
 
 	QStyle *style = o.widget->style();
@@ -375,12 +370,7 @@ void UserView::updateChannel(const QModelIndex &idx) {
 	}
 }
 
-#if QT_VERSION >= 0x050000
-void UserView::dataChanged ( const QModelIndex & topLeft, const QModelIndex & bottomRight, const QVector<int> &)
-#else
-void UserView::dataChanged ( const QModelIndex & topLeft, const QModelIndex & bottomRight)
-#endif
-{
+void UserView::dataChanged ( const QModelIndex & topLeft, const QModelIndex & bottomRight, const QVector<int> &) {
 	UserModel *um = static_cast<UserModel *>(model());
 	int nRowCount = um->rowCount();
 	int i;
@@ -389,4 +379,3 @@ void UserView::dataChanged ( const QModelIndex & topLeft, const QModelIndex & bo
 
 	QTreeView::dataChanged(topLeft,bottomRight);
 }
-
diff --git a/src/mumble/UserView.h b/src/mumble/UserView.h
index 504f457cb..8c50cd82b 100644
--- a/src/mumble/UserView.h
+++ b/src/mumble/UserView.h
@@ -47,12 +47,7 @@ class UserView : public QTreeView {
 	public:
 		UserView(QWidget *);
 		void keyboardSearch(const QString &search) Q_DECL_OVERRIDE;
-#if QT_VERSION >= 0x050000
 		void dataChanged(const QModelIndex & topLeft, const QModelIndex & bottomRight, const QVector<int> & roles = QVector<int> ()) Q_DECL_OVERRIDE;
-#else
-		void dataChanged(const QModelIndex & topLeft, const QModelIndex & bottomRight) Q_DECL_OVERRIDE;
-#endif
-		
 	public slots:
 		void nodeActivated(const QModelIndex &idx);
 		void selectSearchResult();
diff --git a/src/mumble/VersionCheck.cpp b/src/mumble/VersionCheck.cpp
index c70934587..b2c1a25b3 100644
--- a/src/mumble/VersionCheck.cpp
+++ b/src/mumble/VersionCheck.cpp
@@ -67,16 +67,10 @@ VersionCheck::VersionCheck(bool autocheck, QObject *p, bool focus) : QObject(p)
 		}
 	}
 
-#if QT_VERSION >= 0x050000
 	QUrlQuery query;
 	query.setQueryItems(queryItems);
 	url.setQuery(query);
-#else
-	for (int i = 0; i < queryItems.size(); i++) {
-		const QPair<QString, QString> &queryPair = queryItems.at(i);
-		url.addQueryItem(queryPair.first, queryPair.second);
-	}
-#endif
+
 	WebFetch::fetch(QLatin1String("update"), url, this, SLOT(fetched(QByteArray,QUrl)));
 }
 
diff --git a/src/mumble/ViewCert.cpp b/src/mumble/ViewCert.cpp
index 6aa6d539f..3768b4396 100644
--- a/src/mumble/ViewCert.cpp
+++ b/src/mumble/ViewCert.cpp
@@ -18,7 +18,6 @@ static QString decode_utf8_qssl_string(const QString &input) {
 	return QUrl::fromPercentEncoding(i.replace(QLatin1String("\\x"), QLatin1String("%")).toLatin1());
 }
 
-#if QT_VERSION >= 0x050000
 static QStringList processQSslCertificateInfo(QStringList in) {
 	QStringList list;
 	foreach (QString str, in) {
@@ -26,13 +25,6 @@ static QStringList processQSslCertificateInfo(QStringList in) {
 	}
 	return list;
 }
-#else
-static QStringList processQSslCertificateInfo(QString in) {
-	QStringList out;
-	out << decode_utf8_qssl_string(in);
-	return out;
-}
-#endif
 
 static void addQSslCertificateInfo(QStringList &l, const QString &label, const QStringList &items) {
 	foreach (const QString &item, items) {
@@ -132,17 +124,10 @@ void ViewCert::on_Chain_currentRowChanged(int idx) {
 	l << tr("Serial: %1").arg(QString::fromLatin1(c.serialNumber().toHex()));
 	l << tr("Public Key: %1 bits %2").arg(c.publicKey().length()).arg((c.publicKey().algorithm() == QSsl::Rsa) ? tr("RSA") : tr("DSA"));
 	l << tr("Digest (SHA-1): %1").arg(prettifyDigest(QString::fromLatin1(c.digest(QCryptographicHash::Sha1).toHex())));
-#if QT_VERSION >= 0x050000
 	l << tr("Digest (SHA-256): %1").arg(prettifyDigest(QString::fromLatin1(c.digest(QCryptographicHash::Sha256).toHex())));
-#endif
 
-#if QT_VERSION >= 0x050000
 	const QMultiMap<QSsl::AlternativeNameEntryType, QString> &alts = c.subjectAlternativeNames();
 	QMultiMap<QSsl::AlternativeNameEntryType, QString>::const_iterator i;
-#else
-	const QMultiMap<QSsl::AlternateNameEntryType, QString> &alts = c.alternateSubjectNames();
-	QMultiMap<QSsl::AlternateNameEntryType, QString>::const_iterator i;
-#endif
 
 	for (i=alts.constBegin(); i != alts.constEnd(); ++i) {
 		switch (i.key()) {
diff --git a/src/mumble/main.cpp b/src/mumble/main.cpp
index b0b810d34..69613fa67 100644
--- a/src/mumble/main.cpp
+++ b/src/mumble/main.cpp
@@ -55,18 +55,6 @@
 // We define a global macro called 'g'. This can lead to issues when included code uses 'g' as a type or parameter name (like protobuf 3.7 does). As such, for now, we have to make this our last include.
 #include "Global.h"
 
-#if defined(USE_STATIC_QT_PLUGINS) && QT_VERSION < 0x050000
-Q_IMPORT_PLUGIN(qtaccessiblewidgets)
-# ifdef Q_OS_WIN
-   Q_IMPORT_PLUGIN(qico)
-# endif
-Q_IMPORT_PLUGIN(qsvg)
-Q_IMPORT_PLUGIN(qsvgicon)
-# ifdef Q_OS_MAC
-   Q_IMPORT_PLUGIN(qicnsicon)
-# endif
-#endif
-
 #ifdef BOOST_NO_EXCEPTIONS
 namespace boost {
 	void throw_exception(std::exception const &) {
@@ -120,7 +108,7 @@ int main(int argc, char **argv) {
 	a.setAttribute(Qt::AA_UseHighDpiPixmaps);
 #endif
 
-#if QT_VERSION >= 0x050000 && defined(Q_OS_WIN)
+#ifdef Q_OS_WIN
 	a.installNativeEventFilter(&a);
 #endif
 
@@ -508,12 +496,7 @@ int main(int argc, char **argv) {
 	g.s.uiUpdateCounter = 2;
 
 	if (! CertWizard::validateCert(g.s.kpCertificate)) {
-#if QT_VERSION >= 0x050000
 		QDir qd(QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation));
-#else
-		QDir qd(QDesktopServices::storageLocation(QDesktopServices::DocumentsLocation));
-#endif
-
 		QFile qf(qd.absoluteFilePath(QLatin1String("MumbleAutomaticCertificateBackup.p12")));
 		if (qf.open(QIODevice::ReadOnly | QIODevice::Unbuffered)) {
 			Settings::KeyPair kp = CertWizard::importCert(qf.readAll());
diff --git a/src/mumble/os_macx.mm b/src/mumble/os_macx.mm
index 616b5251b..e8a42682c 100644
--- a/src/mumble/os_macx.mm
+++ b/src/mumble/os_macx.mm
@@ -60,16 +60,10 @@ static void mumbleMessageOutputQString(QtMsgType type, const QString &msg) {
 	}
 }
 
-#if QT_VERSION < 0x050000
-static void mumbleMessageOutput(QtMsgType type, const char *msg) {
-	mumbleMessageOutputQString(type, QString::fromUtf8(msg));
-}
-#elif QT_VERSION >= 0x050000
 static void mumbleMessageOutputWithContext(QtMsgType type, const QMessageLogContext &ctx, const QString &msg) {
 	Q_UNUSED(ctx);
 	mumbleMessageOutputQString(type, msg);
 }
-#endif
 
 void query_language() {
 	CFPropertyListRef cfaLangs;
@@ -154,11 +148,7 @@ void os_init() {
 		strcat(buff, logpath);
 		fConsole = fopen(buff, "a+");
 		if (fConsole) {
-#if QT_VERSION >= 0x050000
-		qInstallMessageHandler(mumbleMessageOutputWithContext);
-#else
-		qInstallMsgHandler(mumbleMessageOutput);
-#endif
+			qInstallMessageHandler(mumbleMessageOutputWithContext);
 		}
 	}
 
diff --git a/src/mumble/os_unix.cpp b/src/mumble/os_unix.cpp
index dc14de63d..669d907f6 100644
--- a/src/mumble/os_unix.cpp
+++ b/src/mumble/os_unix.cpp
@@ -38,16 +38,10 @@ static void mumbleMessageOutputQString(QtMsgType type, const QString &msg) {
 	}
 }
 
-#if QT_VERSION < 0x050000
-static void mumbleMessageOutput(QtMsgType type, const char *msg) {
-	mumbleMessageOutputQString(type, QString::fromUtf8(msg));
-}
-#elif QT_VERSION >= 0x050000
 static void mumbleMessageOutputWithContext(QtMsgType type, const QMessageLogContext &ctx, const QString &msg) {
 	Q_UNUSED(ctx);
 	mumbleMessageOutputQString(type, msg);
 }
-#endif
 
 void os_init() {
 	// Make a copy of the global LogEmitter, such that
@@ -55,9 +49,5 @@ void os_init() {
 	// of the Global object and its LogEmitter object.
 	le = g.le;
 
-#if QT_VERSION >= 0x050000
 	qInstallMessageHandler(mumbleMessageOutputWithContext);
-#else
-	qInstallMsgHandler(mumbleMessageOutput);
-#endif
 }
diff --git a/src/mumble/os_win.cpp b/src/mumble/os_win.cpp
index ba107c7ef..2633cb929 100644
--- a/src/mumble/os_win.cpp
+++ b/src/mumble/os_win.cpp
@@ -81,18 +81,10 @@ static void mumbleMessageOutputQString(QtMsgType type, const QString &msg) {
 	}
 }
 
-#if QT_VERSION < 0x050000
-static void mumbleMessageOutput(QtMsgType type, const char *msg) {
-	mumbleMessageOutputQString(type, QString::fromUtf8(msg));
-}
-#endif
-
-#if QT_VERSION >= 0x050000
 static void mumbleMessageOutputWithContext(QtMsgType type, const QMessageLogContext &ctx, const QString &msg) {
 	Q_UNUSED(ctx);
 	mumbleMessageOutputQString(type, msg);
 }
-#endif
 
 static LONG WINAPI MumbleUnhandledExceptionFilter(struct _EXCEPTION_POINTERS* ExceptionInfo) {
 	MINIDUMP_EXCEPTION_INFORMATION i;
@@ -269,11 +261,7 @@ void os_init() {
 	fConsole = _wfsopen(console.toStdWString().c_str(), L"a+", _SH_DENYWR);
 
 	if (fConsole) {
-#if QT_VERSION >= 0x050000
 		qInstallMessageHandler(mumbleMessageOutputWithContext);
-#else
-		qInstallMsgHandler(mumbleMessageOutput);
-#endif
 	}
 
 	QString hash;
diff --git a/src/murmur/Cert.cpp b/src/murmur/Cert.cpp
index 3a1fe10b1..80883cca8 100644
--- a/src/murmur/Cert.cpp
+++ b/src/murmur/Cert.cpp
@@ -129,14 +129,11 @@ void Server::initializeCert() {
 #endif
 
 	QString issuer;
-#if QT_VERSION >= 0x050000
+
 	QStringList issuerNames = qscCert.issuerInfo(QSslCertificate::CommonName);
 	if (! issuerNames.isEmpty()) {
 		issuer = issuerNames.first();
 	}
-#else
-	issuer = qscCert.issuerInfo(QSslCertificate::CommonName);
-#endif
 
 	// Really old certs/keys are no good, throw them away so we can
 	// generate a new one below.
diff --git a/src/murmur/Meta.cpp b/src/murmur/Meta.cpp
index 3baac7a7b..f52620167 100644
--- a/src/murmur/Meta.cpp
+++ b/src/murmur/Meta.cpp
@@ -140,11 +140,7 @@ void MetaParams::read(QString fname) {
 		QStringList datapaths;
 
 #if defined(Q_OS_WIN)
-#if QT_VERSION >= 0x050000
 		datapaths << QStandardPaths::writableLocation(QStandardPaths::DataLocation);
-#else
-		datapaths << QDesktopServices::storageLocation(QDesktopServices::DataLocation);
-#endif
 
 		QDir appdir = QDir(QDir::fromNativeSeparators(EnvUtils::getenv(QLatin1String("APPDATA"))));
 		datapaths << appdir.absolutePath() + QLatin1String("/Mumble");
@@ -188,9 +184,8 @@ void MetaParams::read(QString fname) {
 	}
 	QDir::setCurrent(qdBasePath.absolutePath());
 	qsSettings = new QSettings(qsAbsSettingsFilePath, QSettings::IniFormat);
-#if QT_VERSION >= 0x040500
 	qsSettings->setIniCodec("UTF-8");
-#endif
+
 	qWarning("Initializing settings from %s (basepath %s)", qPrintable(qsSettings->fileName()), qPrintable(qdBasePath.absolutePath()));
 
 	QString qsHost = qsSettings->value("host", QString()).toString();
@@ -258,7 +253,6 @@ void MetaParams::read(QString fname) {
 			hasipv4 = true;
 		}
 
-#if QT_VERSION >= 0x050000
 		if (hasipv6) {
 			if (SslServer::hasDualStackSupport() && hasipv4) {
 				qlBind << QHostAddress(QHostAddress::Any);
@@ -271,23 +265,6 @@ void MetaParams::read(QString fname) {
 		if (hasipv4) {
 			qlBind << QHostAddress(QHostAddress::AnyIPv4);
 		}
-#else // QT_VERSION < 0x050000
-		// For Qt 4 AnyIPv6 resulted in a dual stack socket on dual stack
-		// capable systems while Any resulted in an IPv4 only socket. For
-		// Qt 5 this has been reworked so that AnyIPv6/v4 are now exclusive
-		// IPv6/4 sockets while Any is the dual stack socket.
-
-		if (hasipv6) {
-			qlBind << QHostAddress(QHostAddress::AnyIPv6);
-			if (SslServer::hasDualStackSupport() && hasipv4) {
-				hasipv4 = false; // No need to add a separate ipv4 socket
-			}
-		}
-
-		if (hasipv4) {
-			qlBind << QHostAddress(QHostAddress::Any);
-		}
-#endif
 	}
 
 	qsPassword = typeCheckedFromSettings("serverpassword", qsPassword);
@@ -444,9 +421,7 @@ void MetaParams::read(QString fname) {
 
 bool MetaParams::loadSSLSettings() {
 	QSettings updatedSettings(qsAbsSettingsFilePath, QSettings::IniFormat);
-#if QT_VERSION >= 0x040500
 	updatedSettings.setIniCodec("UTF-8");
-#endif
 
 	QString tmpCiphersStr = typeCheckedFromSettings("sslCiphers", qsCiphers);
 
diff --git a/src/murmur/Server.cpp b/src/murmur/Server.cpp
index 4fc502396..15037c5c5 100644
--- a/src/murmur/Server.cpp
+++ b/src/murmur/Server.cpp
@@ -95,11 +95,7 @@ bool SslServer::hasDualStackSupport() {
 	return result;
 }
 
-#if QT_VERSION >= 0x050000
 void SslServer::incomingConnection(qintptr v) {
-#else
-void SslServer::incomingConnection(int v) {
-#endif
 	QSslSocket *s = new QSslSocket(this);
 	s->setSocketDescriptor(v);
 	qlSockets.append(s);
@@ -1299,10 +1295,8 @@ void Server::newClient() {
 		// In Qt 5.4, QSsl::SecureProtocols is equivalent
 		// to "TLSv1.0 or later", which we require.
 		sock->setProtocol(QSsl::SecureProtocols);
-#elif QT_VERSION >= 0x050000
-		sock->setProtocol(QSsl::TlsV1_0);
 #else
-		sock->setProtocol(QSsl::TlsV1);
+		sock->setProtocol(QSsl::TlsV1_0);
 #endif
 		sock->startServerEncryption();
 	}
@@ -1327,14 +1321,9 @@ void Server::encrypted() {
 	QList<QSslCertificate> certs = uSource->peerCertificateChain();
 	if (!certs.isEmpty()) {
 		const QSslCertificate &cert = certs.last();
-#if QT_VERSION >= 0x050000
 		uSource->qslEmail = cert.subjectAlternativeNames().values(QSsl::EmailEntry);
-#else
-		uSource->qslEmail = cert.alternateSubjectNames().values(QSsl::EmailEntry);
-#endif
 		uSource->qsHash = cert.digest(QCryptographicHash::Sha1).toHex();
 		if (! uSource->qslEmail.isEmpty() && uSource->bVerified) {
-#if QT_VERSION >= 0x050000
 			QString subject;
 			QString issuer;
 
@@ -1347,10 +1336,7 @@ void Server::encrypted() {
 			if (! issuerList.isEmpty()) {
 				issuer = issuerList.first();
 			}
-#else
-			QString subject = cert.subjectInfo(QSslCertificate::CommonName);
-			QString issuer = certs.first().issuerInfo(QSslCertificate::CommonName);
-#endif
+
 			log(uSource, QString::fromUtf8("Strong certificate for %1 <%2> (signed by %3)").arg(subject).arg(uSource->qslEmail.join(", ")).arg(issuer));
 		}
 
@@ -1424,11 +1410,8 @@ void Server::sslError(const QList<QSslError> &errors) {
 		// See
 		// https://bugreports.qt.io/browse/QTBUG-53906
 		// https://github.com/mumble-voip/mumble/issues/2334
-#if QT_VERSION >= 0x050000
+
 		u->disconnectSocket();
-#else
-		u->disconnectSocket(true);
-#endif
 	}
 }
 
diff --git a/src/murmur/Server.h b/src/murmur/Server.h
index 79dd87b07..03e0b719b 100644
--- a/src/murmur/Server.h
+++ b/src/murmur/Server.h
@@ -65,11 +65,7 @@ class SslServer : public QTcpServer {
 		Q_DISABLE_COPY(SslServer)
 	protected:
 		QList<QSslSocket *> qlSockets;
-#if QT_VERSION >= 0x050000
 		void incomingConnection(qintptr) Q_DECL_OVERRIDE;
-#else
-		void incomingConnection(int) Q_DECL_OVERRIDE;
-#endif
 	public:
 		QSslSocket *nextPendingSSLConnection();
 		SslServer(QObject *parent = NULL);
diff --git a/src/murmur/main.cpp b/src/murmur/main.cpp
index 5572ea67c..ea6a99031 100644
--- a/src/murmur/main.cpp
+++ b/src/murmur/main.cpp
@@ -151,16 +151,10 @@ static void murmurMessageOutputQString(QtMsgType type, const QString &msg) {
 	}
 }
 
-#if QT_VERSION >= 0x050000
 static void murmurMessageOutputWithContext(QtMsgType type, const QMessageLogContext &ctx, const QString &msg) {
 	Q_UNUSED(ctx);
 	murmurMessageOutputQString(type, msg);
 }
-#else
-static void murmurMessageOutput(QtMsgType type, const char *msg) {
-	murmurMessageOutputQString(type, QString::fromUtf8(msg));
-}
-#endif
 
 #ifdef USE_ICE
 void IceParse(int &argc, char *argv[]);
@@ -220,9 +214,6 @@ int main(int argc, char **argv) {
 	MumbleSSL::initialize();
 
 	QTextCodec::setCodecForLocale(QTextCodec::codecForName("UTF-8"));
-#if QT_VERSION < 0x050000
-	QTextCodec::setCodecForCStrings(QTextCodec::codecForName("UTF-8"));
-#endif
 
 #ifdef Q_OS_WIN
 	// By default, windbus expects the path to dbus-daemon to be in PATH, and the path
@@ -252,11 +243,8 @@ int main(int argc, char **argv) {
 #endif
 
 	qsrand(QDateTime::currentDateTime().toTime_t());
-#if QT_VERSION >= 0x050000
+
 	qInstallMessageHandler(murmurMessageOutputWithContext);
-#else
-	qInstallMsgHandler(murmurMessageOutput);
-#endif
 
 #ifdef Q_OS_WIN
 	Tray tray(NULL, &le);
@@ -618,11 +606,7 @@ int main(int argc, char **argv) {
 
 	delete meta;
 
-#if QT_VERSION >= 0x050000
 	qInstallMessageHandler(NULL);
-#else
-	qInstallMsgHandler(NULL);
-#endif
 
 #ifdef Q_OS_UNIX
 	if (! Meta::mp.qsPid.isEmpty()) {
diff --git a/src/tests/TestServerResolver/TestServerResolver.cpp b/src/tests/TestServerResolver/TestServerResolver.cpp
index e8c984509..ddafcdb11 100644
--- a/src/tests/TestServerResolver/TestServerResolver.cpp
+++ b/src/tests/TestServerResolver/TestServerResolver.cpp
@@ -13,13 +13,7 @@
 void signalSpyWait(QSignalSpy &spy) {
 	// We increase the timeout from 5s to 8s because travis builds could fail otherwise (slow network response).
 	const int signalTimeoutS = 8;
-#if QT_VERSION >= 0x050000
 	spy.wait(signalTimeoutS * 1000);
-#else
-	// Equivalent to QSignalSpy::wait() in Qt 5, except we do not return early on a spied on signal result.
-	QTestEventLoop loop;
-	loop.enterLoop(signalTimeoutS);
-#endif
 }
 
 class TestServerResolver : public QObject {