chore: remove old qt version checks (#6863)

Remove all Qt version checks for Qt versions below 6.5.

Reviewed-by: pajlada <rasmus.karlsson@pajlada.com>

src/common/Credentials.cpp

@@ -22,11 +22,7 @@
 
 #ifndef NO_QTKEYCHAIN
 #    ifdef CMAKE_BUILD
-#        if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
-#            include "qt6keychain/keychain.h"
-#        else
-#            include "qt5keychain/keychain.h"
-#        endif
+#        include "qt6keychain/keychain.h"
 #    else
 #        include <qtkeychain/keychain.h>
 #    endif

src/common/LinkParser.cpp

@@ -33,12 +33,6 @@ TldSet &tlds()
         }
         QTextStream stream(&file);
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
-        // Default encoding of QTextStream is already UTF-8, at least in Qt6
-#else
-        stream.setCodec("UTF-8");
-#endif
-
         TldSet set;
 
         while (!stream.atEnd())

src/common/network/NetworkTask.cpp

@@ -44,7 +44,6 @@ void NetworkTask::run()
     const auto &timeout = this->data_->timeout;
     if (timeout.has_value())
     {
-#if QT_VERSION >= QT_VERSION_CHECK(6, 3, 0)
         QObject::connect(this->reply_, &QNetworkReply::requestSent, this,
                          [this]() {
                              const auto &timeout = this->data_->timeout;
@@ -54,13 +53,6 @@ void NetworkTask::run()
                              QObject::connect(this->timer_, &QTimer::timeout,
                                               this, &NetworkTask::timeout);
                          });
-#else
-        this->timer_ = new QTimer(this);
-        this->timer_->setSingleShot(true);
-        this->timer_->start(timeout.value());
-        QObject::connect(this->timer_, &QTimer::timeout, this,
-                         &NetworkTask::timeout);
-#endif
     }
 
     QObject::connect(this->reply_, &QNetworkReply::finished, this,

src/controllers/filters/lang/Types.hpp

@@ -77,30 +77,18 @@ bool isList(const PossibleType &possibleType);
 
 inline bool variantIs(const QVariant &a, int type)
 {
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     return a.typeId() == type;
-#else
-    return a.type() == type;
-#endif
 }
 
 inline bool variantIsNot(const QVariant &a, int type)
 {
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     return a.typeId() != type;
-#else
-    return a.type() != type;
-#endif
 }
 
 inline bool convertVariantTypes(QVariant &a, QVariant &b, int type)
 {
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     QMetaType ty(type);
     return a.convert(ty) && b.convert(ty);
-#else
-    return a.convert(type) && b.convert(type);
-#endif
 }
 
 inline bool variantTypesMatch(QVariant &a, QVariant &b, int type)

src/controllers/filters/lang/expressions/BinaryOperation.cpp

@@ -12,7 +12,6 @@ namespace {
 /// This attempts to convert both variants to a common type if they're not equal.
 bool looselyCompareVariants(QVariant &lhs, QVariant &rhs)
 {
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     // Qt 6 and later don't convert types as much as Qt 5 did when comparing.
     //
     // Based on QVariant::cmp from Qt 5.15
@@ -36,7 +35,6 @@ bool looselyCompareVariants(QVariant &lhs, QVariant &rhs)
             }
         }
     }
-#endif
 
     return lhs == rhs;
 }
@@ -217,11 +215,7 @@ QVariant BinaryOperation::execute(const ContextMap &context) const
 
             auto matching = left.toString();
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
             switch (static_cast<QMetaType::Type>(right.typeId()))
-#else
-            switch (static_cast<QMetaType::Type>(right.type()))
-#endif
             {
                 case QMetaType::QRegularExpression: {
                     return right.toRegularExpression()

src/controllers/ignores/IgnoreController.cpp

@@ -243,11 +243,7 @@ void processIgnorePhrases(const std::vector<IgnorePhrase> &phrases,
             return;
         }
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
         auto words = midrepl.tokenize(u' ');
-#else
-        auto words = midrepl.split(' ');
-#endif
         SizeType pos = 0;
         for (const auto &word : words)
         {
@@ -313,11 +309,7 @@ void processIgnorePhrases(const std::vector<IgnorePhrase> &phrases,
             QRegularExpression emoteregex(
                 "\\b" + emote.name.string + "\\b",
                 QRegularExpression::UseUnicodePropertiesOption);
-#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
             auto match = emoteregex.matchView(midExtendedRef);
-#else
-            auto match = emoteregex.match(midExtendedRef);
-#endif
             if (match.hasMatch())
             {
                 emote.start = static_cast<int>(from + match.capturedStart());

src/main.cpp

@@ -119,18 +119,16 @@ int main(int argc, char **argv)
         qCInfo(chatterinoApp).noquote()
             << "Chatterino Qt SSL library version:"
             << QSslSocket::sslLibraryVersionString();
-#if QT_VERSION >= QT_VERSION_CHECK(6, 1, 0)
         qCInfo(chatterinoApp).noquote()
             << "Chatterino Qt SSL active backend:"
             << QSslSocket::activeBackend() << "of"
             << QSslSocket::availableBackends().join(", ");
-#    if QT_VERSION >= QT_VERSION_CHECK(6, 7, 0)
+#if QT_VERSION >= QT_VERSION_CHECK(6, 7, 0)
         qCInfo(chatterinoApp) << "Chatterino Qt SSL active backend features:"
                               << QSslSocket::supportedFeatures();
-#    endif
+#endif
         qCInfo(chatterinoApp) << "Chatterino Qt SSL active backend protocols:"
                               << QSslSocket::supportedProtocols();
-#endif
 
         Settings settings(args, paths->settingsDirectory);
 

src/messages/MessageElement.cpp

@@ -829,11 +829,7 @@ FontStyle TextElement::fontStyle() const noexcept
 
 void TextElement::appendText(QStringView text)
 {
-#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
-    for (auto word : text.split(' '))  // creates a QList
-#else
     for (auto word : text.tokenize(u' '))
-#endif
     {
         this->words_.append(word.toString());
     }
@@ -841,9 +837,6 @@ void TextElement::appendText(QStringView text)
 
 void TextElement::appendText(const QString &text)
 {
-#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
-    this->appendText(QStringView{text});
-#else
     qsizetype firstSpace = text.indexOf(u' ');
     if (firstSpace == -1)
     {
@@ -857,7 +850,6 @@ void TextElement::appendText(const QString &text)
     {
         this->words_.emplace_back(word.toString());
     }
-#endif
 }
 
 QJsonObject TextElement::toJson() const

src/providers/twitch/eventsub/Controller.cpp

@@ -57,16 +57,12 @@ public:
 
     void debug(std::string_view msg) override
     {
-#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
         qCDebug(this->loggingCategory).noquote() << msg;
-#endif
     }
 
     void warn(std::string_view msg) override
     {
-#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
         qCWarning(this->loggingCategory).noquote() << msg;
-#endif
     }
 
 private:

src/singletons/Fonts.cpp

@@ -18,7 +18,6 @@ using namespace chatterino;
 
 int getUsernameBoldness()
 {
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     // From qfont.cpp
     // https://github.com/qt/qtbase/blob/589c6d066f84833a7c3dda1638037f4b2e91b7aa/src/gui/text/qfont.cpp#L143-L169
     static constexpr std::array<std::array<int, 2>, 9> legacyToOpenTypeMap{{
@@ -55,9 +54,6 @@ int getUsernameBoldness()
     }
 
     return result;
-#else
-    return getSettings()->boldScale.getValue();
-#endif
 }
 
 float fontSize(FontStyle style)

src/singletons/Theme.cpp

@@ -11,6 +11,7 @@
 #include "singletons/Resources.hpp"
 #include "singletons/WindowManager.hpp"
 
+#include <QApplication>
 #include <QColor>
 #include <QDir>
 #include <QElapsedTimer>
@@ -18,10 +19,7 @@
 #include <QJsonArray>
 #include <QJsonDocument>
 #include <QSet>
-#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
-#    include <QStyleHints>
-#endif
-#include <QApplication>
+#include <QStyleHints>
 
 #include <cmath>
 #include <numbers>
@@ -334,7 +332,6 @@ Theme::Theme(const Paths &paths)
 
     this->loadAvailableThemes(paths);
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
     QObject::connect(QApplication::styleHints(),
                      &QStyleHints::colorSchemeChanged, &this->lifetime_,
                      [this] {
@@ -344,7 +341,6 @@ Theme::Theme(const Paths &paths)
                              getApp()->getWindows()->forceLayoutChannelViews();
                          }
                      });
-#endif
 
     this->update();
 }
@@ -352,7 +348,6 @@ Theme::Theme(const Paths &paths)
 void Theme::update()
 {
     auto currentTheme = [&]() -> QString {
-#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
         if (this->isSystemTheme())
         {
             switch (QApplication::styleHints()->colorScheme())
@@ -364,7 +359,6 @@ void Theme::update()
                     return this->darkSystemThemeName;
             }
         }
-#endif
         return this->themeName;
     };
 

src/util/Helpers.cpp

@@ -381,20 +381,12 @@ QStringView codepointSlice(QStringView str, qsizetype begin, qsizetype end)
 
 void removeFirstQS(QString &str)
 {
-#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
     str.removeFirst();
-#else
-    str.remove(0, 1);
-#endif
 }
 
 void removeLastQS(QString &str)
 {
-#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
     str.removeLast();
-#else
-    str.chop(1);
-#endif
 }
 
 void writeProviderEmotesCache(const QString &id, const QString &provider,

src/util/QCompareTransparent.hpp

@@ -8,10 +8,7 @@
 #include <QString>
 #include <QStringView>
 #include <QtGlobal>
-
-#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
-#    include <QUtf8StringView>
-#endif
+#include <QUtf8StringView>
 
 namespace chatterino {
 
@@ -33,7 +30,6 @@ struct QCompareTransparentBase {
     bool operator()(QStringView     a, QLatin1String   b) const noexcept;
     bool operator()(QLatin1String   a, QStringView     b) const noexcept;
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
     bool operator()(QUtf8StringView a, QUtf8StringView b) const noexcept;
 
     bool operator()(const QString & a, QUtf8StringView b) const noexcept;
@@ -43,7 +39,6 @@ struct QCompareTransparentBase {
     bool operator()(QUtf8StringView a, const QString & b) const noexcept;
     bool operator()(QUtf8StringView a, QStringView     b) const noexcept;
     bool operator()(QUtf8StringView a, QLatin1String   b) const noexcept;
-#endif
     // clang-format on
 };
 
@@ -116,7 +111,6 @@ inline bool QCompareTransparentBase<CS>::operator()(
     return a.compare(b, CS) < 0;
 }
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
 template <Qt::CaseSensitivity CS>
 inline bool QCompareTransparentBase<CS>::operator()(
     QUtf8StringView a, QUtf8StringView b) const noexcept
@@ -165,6 +159,5 @@ inline bool QCompareTransparentBase<CS>::operator()(
 {
     return a.compare(b, CS) < 0;
 }
-#endif
 
 }  // namespace chatterino

src/util/QMagicEnum.hpp

@@ -134,20 +134,13 @@ public:
 ///      the entire duration of the program).
 ///
 /// @param view The view to turn into a static string
-/// @returns Qt6: A static string (never gets freed), Qt5: regular string
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+/// @returns A static string (never gets freed)
 [[nodiscard]] inline QString staticString(QStringView view) noexcept
 {
     // NOLINTNEXTLINE(cppcoreguidelines-pro-type-const-cast)
     return QString(QStringPrivate(nullptr, const_cast<char16_t *>(view.utf16()),
                                   view.size()));
 }
-#else
-[[nodiscard]] inline QString staticString(QStringView view)
-{
-    return view.toString();
-}
-#endif
 
 }  // namespace chatterino::qmagicenum::detail
 

src/util/RenameThread.cpp

@@ -14,7 +14,6 @@ namespace chatterino::windows::detail {
 
 void renameThread(HANDLE hThread, const QString &threadName)
 {
-#    if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     // SetThreadDescription requires Windows 10, version 1607
     // Qt 6 requires Windows 10 1809
 
@@ -25,7 +24,6 @@ void renameThread(HANDLE hThread, const QString &threadName)
             << "Failed to set thread description, hresult=0x"
             << QString::number(hr, 16);
     }
-#    endif
 }
 
 }  // namespace chatterino::windows::detail

src/widgets/BaseWindow.cpp

@@ -131,17 +131,13 @@ RECT windowBordersFor(HWND hwnd, bool isMaximized)
     {
         // GetDpiForWindow and GetSystemMetricsForDpi are only supported on
         // Windows 10 and later. Qt 6 requires Windows 10.
-#    if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
         auto dpi = GetDpiForWindow(hwnd);
-#    endif
 
         auto systemMetric = [&](auto index) {
-#    if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
             if (dpi != 0)
             {
                 return GetSystemMetricsForDpi(index, dpi);
             }
-#    endif
             return GetSystemMetrics(index);
         };
 
@@ -804,13 +800,8 @@ void BaseWindow::showEvent(QShowEvent *)
 #endif
 }
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 bool BaseWindow::nativeEvent(const QByteArray &eventType, void *message,
                              qintptr *result)
-#else
-bool BaseWindow::nativeEvent(const QByteArray &eventType, void *message,
-                             long *result)
-#endif
 {
 #ifdef USEWINSDK
     MSG *msg = reinterpret_cast<MSG *>(message);
@@ -1134,11 +1125,7 @@ bool BaseWindow::handleSHOWWINDOW(MSG *msg)
 #endif
 }
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 bool BaseWindow::handleNCCALCSIZE(MSG *msg, qintptr *result)
-#else
-bool BaseWindow::handleNCCALCSIZE(MSG *msg, long *result)
-#endif
 {
 #ifdef USEWINSDK
     if (!this->hasCustomWindowFrame())
@@ -1250,11 +1237,7 @@ bool BaseWindow::handleMOVE(MSG *msg)
     return false;
 }
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 bool BaseWindow::handleNCHITTEST(MSG *msg, qintptr *result)
-#else
-bool BaseWindow::handleNCHITTEST(MSG *msg, long *result)
-#endif
 {
 #ifdef USEWINSDK
     const LONG borderWidth = 8;  // in device independent pixels

src/widgets/BaseWindow.hpp

@@ -128,13 +128,8 @@ protected:
 
     virtual void windowDeactivationEvent();
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     bool nativeEvent(const QByteArray &eventType, void *message,
                      qintptr *result) override;
-#else
-    bool nativeEvent(const QByteArray &eventType, void *message,
-                     long *result) override;
-#endif
     void scaleChangedEvent(float) override;
 
     void paintEvent(QPaintEvent *) override;
@@ -177,13 +172,8 @@ private:
     bool handleSHOWWINDOW(MSG *msg);
     bool handleSIZE(MSG *msg);
     bool handleMOVE(MSG *msg);
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     bool handleNCCALCSIZE(MSG *msg, qintptr *result);
     bool handleNCHITTEST(MSG *msg, qintptr *result);
-#else
-    bool handleNCCALCSIZE(MSG *msg, long *result);
-    bool handleNCHITTEST(MSG *msg, long *result);
-#endif
 
     void appendTitlebarButton(Button *button);
 

src/widgets/FramelessEmbedWindow.cpp

@@ -32,13 +32,8 @@ FramelessEmbedWindow::FramelessEmbedWindow()
 }
 
 #ifdef USEWINSDK
-#    if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 bool FramelessEmbedWindow::nativeEvent(const QByteArray &eventType,
                                        void *message, qintptr *result)
-#    else
-bool FramelessEmbedWindow::nativeEvent(const QByteArray &eventType,
-                                       void *message, long *result)
-#    endif
 {
     MSG *msg = reinterpret_cast<MSG *>(message);
 

src/widgets/FramelessEmbedWindow.hpp

@@ -18,13 +18,8 @@ public:
 protected:
 #ifdef USEWINSDK
 
-#    if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     bool nativeEvent(const QByteArray &eventType, void *message,
                      qintptr *result) override;
-#    else
-    bool nativeEvent(const QByteArray &eventType, void *message,
-                     long *result) override;
-#    endif
 
     void showEvent(QShowEvent *event) override;
 #endif

src/widgets/OverlayWindow.cpp

@@ -299,7 +299,7 @@ void OverlayWindow::toggleInertia()
     this->setInert(!this->inert_);
 }
 
-void OverlayWindow::enterEvent(EnterEvent * /*event*/)
+void OverlayWindow::enterEvent(QEnterEvent * /*event*/)
 {
 #ifndef OVERLAY_NATIVE_MOVE
     this->startInteraction();
@@ -315,7 +315,7 @@ void OverlayWindow::leaveEvent(QEvent * /*event*/)
 
 #ifdef Q_OS_WIN
 bool OverlayWindow::nativeEvent(const QByteArray &eventType, void *message,
-                                NativeResult *result)
+                                qintptr *result)
 {
     // NOLINTNEXTLINE(cppcoreguidelines-pro-type-reinterpret-cast)
     MSG *msg = reinterpret_cast<MSG *>(message);
@@ -368,7 +368,7 @@ bool OverlayWindow::nativeEvent(const QByteArray &eventType, void *message,
     return returnValue;
 }
 
-void OverlayWindow::handleNCHITTEST(MSG *msg, NativeResult *result)
+void OverlayWindow::handleNCHITTEST(MSG *msg, qintptr *result)
 {
     // This implementation is similar to the one of BaseWindow, but has the
     // following differences:

src/widgets/OverlayWindow.hpp

@@ -41,21 +41,13 @@ public:
     void drawOutline(QPainter &painter) override;
 
 protected:
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
-    using NativeResult = qintptr;
-    using EnterEvent = QEnterEvent;
-#else
-    using NativeResult = long;
-    using EnterEvent = QEvent;
-#endif
-
     bool eventFilter(QObject *object, QEvent *event) override;
-    void enterEvent(EnterEvent *event) override;
+    void enterEvent(QEnterEvent *event) override;
     void leaveEvent(QEvent *event) override;
 
 #ifdef Q_OS_WIN
     bool nativeEvent(const QByteArray &eventType, void *message,
-                     NativeResult *result) override;
+                     qintptr *result) override;
 #endif
 
     void addShortcuts() override;
@@ -72,7 +64,7 @@ private:
     void applyTheme();
 
 #ifdef Q_OS_WIN
-    void handleNCHITTEST(MSG *msg, NativeResult *result);
+    void handleNCHITTEST(MSG *msg, qintptr *result);
 
     HCURSOR sizeAllCursor_;
 #endif

src/widgets/PluginRepl.cpp

@@ -334,12 +334,7 @@ void stringify(sol::stack_proxy it, QString &s, size_t maxItems = 10,
                         {
                             s.append(u", ["_s);
                         }
-#    if QT_VERSION < QT_VERSION_CHECK(6, 5, 0)
-                        s.append(QString::fromUtf8(
-                            key.data(), static_cast<qsizetype>(key.size())));
-#    else
                         s.append(QUtf8StringView(key));
-#    endif
                         s.append("] = <dyn>");
                         n++;
                     }

src/widgets/buttons/Button.cpp

@@ -169,11 +169,7 @@ void Button::setOpaqueContent(bool opaqueContent)
     this->opaqueContent_ = opaqueContent;
 }
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 void Button::enterEvent(QEnterEvent * /*event*/)
-#else
-void Button::enterEvent(QEvent * /*event*/)
-#endif
 {
     if (!this->mouseOver_)
     {

src/widgets/buttons/Button.hpp

@@ -182,11 +182,7 @@ protected:
     /// Setter for #opaqueContent()
     void setOpaqueContent(bool opaqueContent);
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     void enterEvent(QEnterEvent * /*event*/) override;
-#else
-    void enterEvent(QEvent * /*event*/) override;
-#endif
     void leaveEvent(QEvent *event) override;
     void mousePressEvent(QMouseEvent *event) override;
     void mouseReleaseEvent(QMouseEvent *event) override;

src/widgets/helper/ChannelView.cpp

@@ -1869,11 +1869,7 @@ void ChannelView::wheelEvent(QWheelEvent *event)
     }
 }
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 void ChannelView::enterEvent(QEnterEvent * /*event*/)
-#else
-void ChannelView::enterEvent(QEvent * /*event*/)
-#endif
 {
 }
 

src/widgets/helper/ChannelView.hpp

@@ -244,11 +244,7 @@ protected:
     void paintEvent(QPaintEvent * /*event*/) override;
     void wheelEvent(QWheelEvent *event) override;
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     void enterEvent(QEnterEvent * /*event*/) override;
-#else
-    void enterEvent(QEvent * /*event*/) override;
-#endif
     void leaveEvent(QEvent * /*event*/) override;
 
     bool event(QEvent *event) override;

src/widgets/helper/NotebookTab.cpp

@@ -1167,11 +1167,7 @@ void NotebookTab::mouseDoubleClickEvent(QMouseEvent *event)
     }
 }
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 void NotebookTab::enterEvent(QEnterEvent *event)
-#else
-void NotebookTab::enterEvent(QEvent *event)
-#endif
 {
     this->mouseOver_ = true;
 

src/widgets/helper/NotebookTab.hpp

@@ -102,11 +102,7 @@ protected:
     void mousePressEvent(QMouseEvent *event) override;
     void mouseReleaseEvent(QMouseEvent *event) override;
     void mouseDoubleClickEvent(QMouseEvent *event) override;
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     void enterEvent(QEnterEvent *event) override;
-#else
-    void enterEvent(QEvent *event) override;
-#endif
     void leaveEvent(QEvent *) override;
 
     void dragEnterEvent(QDragEnterEvent *event) override;

src/widgets/helper/TableStyles.cpp

@@ -19,11 +19,7 @@ TableRowDragStyle::TableRowDragStyle(const QString &name)
 
 void TableRowDragStyle::applyTo(QTableView *view)
 {
-#if QT_VERSION >= QT_VERSION_CHECK(6, 1, 0)
     auto styleName = view->style()->name();
-#else
-    QString styleName = "fusion";
-#endif
     auto *proxyStyle = new TableRowDragStyle(styleName);
     proxyStyle->setParent(view);
     view->setStyle(proxyStyle);

src/widgets/helper/color/ColorItemDelegate.cpp

@@ -19,11 +19,7 @@ void ColorItemDelegate::paint(QPainter *painter,
 {
     auto data = index.data(Qt::DecorationRole);
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     if (data.typeId() != QMetaType::QColor)
-#else
-    if (data.type() != QVariant::Color)
-#endif
     {
         return QStyledItemDelegate::paint(painter, option, index);
     }

src/widgets/settingspages/AboutPage.cpp

@@ -191,11 +191,6 @@ AboutPage::AboutPage()
             }
 
             QTextStream stream(&contributorsFile);
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
-            // Default encoding of QTextStream is already UTF-8
-#else
-            stream.setCodec("UTF-8");
-#endif
 
             QString line;
 

src/widgets/settingspages/GeneralPage.cpp

@@ -134,14 +134,11 @@ void GeneralPage::initLayout(GeneralPageView &layout)
     {
         auto *themes = getApp()->getThemes();
         auto available = themes->availableThemes();
-#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
         available.emplace_back("System", "System");
-#endif
 
         SettingWidget::dropdown("Theme", themes->themeName, available)
             ->addTo(layout);
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
         SettingWidget::dropdown("Dark system theme",
                                 themes->darkSystemThemeName,
                                 themes->availableThemes())
@@ -157,7 +154,6 @@ void GeneralPage::initLayout(GeneralPageView &layout)
                          "theme and you enabled the adaptive 'System' theme.")
             ->conditionallyEnabledBy(themes->themeName, "System")
             ->addTo(layout);
-#endif
     }
 
     layout.addDropdown<float>(

src/widgets/settingspages/KeyboardSettingsPage.cpp

@@ -90,9 +90,7 @@ KeyboardSettingsPage::KeyboardSettingsPage()
 
     auto *keySequenceInput = new QKeySequenceEdit(this);
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 4, 0)
     keySequenceInput->setClearButtonEnabled(true);
-#endif
     auto *searchText = new QLabel("Search keybind:", this);
 
     QObject::connect(keySequenceInput, &QKeySequenceEdit::keySequenceChanged,

src/widgets/splits/SplitHeader.cpp

@@ -1066,11 +1066,7 @@ void SplitHeader::mouseDoubleClickEvent(QMouseEvent *event)
     this->doubleClicked_ = true;
 }
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 void SplitHeader::enterEvent(QEnterEvent *event)
-#else
-void SplitHeader::enterEvent(QEvent *event)
-#endif
 {
     if (!this->tooltipText_.isEmpty())
     {

src/widgets/splits/SplitHeader.hpp

@@ -49,11 +49,7 @@ protected:
     void mousePressEvent(QMouseEvent *event) override;
     void mouseReleaseEvent(QMouseEvent *event) override;
     void mouseMoveEvent(QMouseEvent *event) override;
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     void enterEvent(QEnterEvent *event) override;
-#else
-    void enterEvent(QEvent *event) override;
-#endif
     void leaveEvent(QEvent *event) override;
     void mouseDoubleClickEvent(QMouseEvent *event) override;