diff --git a/include/ALabel.hpp b/include/ALabel.hpp
index 816fd4f5..c4fa9234 100644
--- a/include/ALabel.hpp
+++ b/include/ALabel.hpp
@@ -24,7 +24,7 @@ class ALabel : public AModule, public Gtk::Label {
   bool alt_ = false;
   std::string default_format_;
 
-  void handleToggle(int n_press, double dx, double dy);
+  void handleToggle(int n_press, double dx, double dy) override;
   virtual std::string getState(uint8_t value, bool lesser = false);
 };
 
diff --git a/include/AModule.hpp b/include/AModule.hpp
index d610b0df..07b085c8 100644
--- a/include/AModule.hpp
+++ b/include/AModule.hpp
@@ -31,6 +31,7 @@ class AModule : public IModule {
   const Json::Value &config_;
   Glib::RefPtr<Gtk::GestureClick> controllClick_;
   Glib::RefPtr<Gtk::EventControllerScroll> controllScroll_;
+  enum SCROLL_DIR { NONE, UP, DOWN, LEFT, RIGHT };
 
   void bindEvents(Gtk::Widget& wg);
   bool tooltipEnabled();
@@ -38,9 +39,9 @@ class AModule : public IModule {
   virtual void handleToggle(int n_press, double dx, double dy);
   virtual void handleRelease(int n_press, double dx, double dy);
   virtual bool handleScroll(double dx, double dy);
+  const SCROLL_DIR getScrollDir(Glib::RefPtr<const Gdk::Event> e);
 
  private:
-  enum SCROLL_DIR { NONE, UP, DOWN, LEFT, RIGHT };
   const bool isTooltip;
   std::vector<int> pid_;
   double distance_scrolled_x_{0.0};
@@ -70,7 +71,6 @@ class AModule : public IModule {
     {std::make_pair(std::make_pair(9u, 3), Gdk::Event::Type::BUTTON_PRESS), "on-triple-click-forward"}
   };
   void handleClickEvent(uint n_button, int n_press, Gdk::Event::Type n_evtype);
-  const SCROLL_DIR getScrollDir(Glib::RefPtr<const Gdk::Event> e);
 };
 
 }  // namespace waybar
diff --git a/include/ASlider.hpp b/include/ASlider.hpp
index 44cde507..665c52e7 100644
--- a/include/ASlider.hpp
+++ b/include/ASlider.hpp
@@ -11,9 +11,9 @@ class ASlider : public AModule {
   virtual void onValueChanged();
 
  protected:
-  bool vertical_ = false;
-  int min_ = 0, max_ = 100, curr_ = 50;
+  bool vertical_{false};
+  int min_{0}, max_{100}, curr_{50};
   Gtk::Scale scale_;
 };
 
-}  // namespace waybar
\ No newline at end of file
+}  // namespace waybar
diff --git a/include/modules/backlight.hpp b/include/modules/backlight.hpp
index 110cd434..12361294 100644
--- a/include/modules/backlight.hpp
+++ b/include/modules/backlight.hpp
@@ -1,32 +1,22 @@
 #pragma once
 
-#include <memory>
-#include <optional>
-#include <string>
-#include <string_view>
-#include <vector>
-
 #include "ALabel.hpp"
 #include "util/backlight_backend.hpp"
-#include "util/json.hpp"
-
-struct udev;
-struct udev_device;
 
 namespace waybar::modules {
 
-class Backlight : public ALabel {
+class Backlight final : public ALabel {
  public:
   Backlight(const std::string &, const Json::Value &);
   virtual ~Backlight() = default;
   auto update() -> void override;
 
-  bool handleScroll(GdkEventScroll *e) override;
-
+ private:
   const std::string preferred_device_;
-
   std::string previous_format_;
-
   util::BacklightBackend backend;
+
+  bool handleScroll(double dx, double dy) override;
 };
+
 }  // namespace waybar::modules
diff --git a/include/modules/backlight_slider.hpp b/include/modules/backlight_slider.hpp
index 437c53c4..30fad3fc 100644
--- a/include/modules/backlight_slider.hpp
+++ b/include/modules/backlight_slider.hpp
@@ -1,13 +1,11 @@
 #pragma once
 
-#include <chrono>
-
 #include "ASlider.hpp"
 #include "util/backlight_backend.hpp"
 
 namespace waybar::modules {
 
-class BacklightSlider : public ASlider {
+class BacklightSlider final : public ASlider {
  public:
   BacklightSlider(const std::string&, const Json::Value&);
   virtual ~BacklightSlider() = default;
@@ -21,4 +19,4 @@ class BacklightSlider : public ASlider {
   util::BacklightBackend backend;
 };
 
-}  // namespace waybar::modules
\ No newline at end of file
+}  // namespace waybar::modules
diff --git a/include/util/backend_common.hpp b/include/util/backend_common.hpp
index dda6ac57..6f6f348b 100644
--- a/include/util/backend_common.hpp
+++ b/include/util/backend_common.hpp
@@ -1,10 +1,8 @@
 #pragma once
 
-#include "AModule.hpp"
-
 namespace waybar::util {
 
 const static auto NOOP = []() {};
 enum class ChangeType : char { Increase, Decrease };
 
-}  // namespace waybar::util
\ No newline at end of file
+}  // namespace waybar::util
diff --git a/include/util/backlight_backend.hpp b/include/util/backlight_backend.hpp
index 8dcb8958..0d6afa47 100644
--- a/include/util/backlight_backend.hpp
+++ b/include/util/backlight_backend.hpp
@@ -1,14 +1,6 @@
 #pragma once
 
 #include <libudev.h>
-#include <spdlog/spdlog.h>
-
-#include <chrono>
-#include <mutex>
-#include <optional>
-#include <string>
-#include <string_view>
-#include <vector>
 
 #include "giomm/dbusproxy.h"
 #include "util/backend_common.hpp"
@@ -42,9 +34,9 @@ class BacklightDevice {
 
  private:
   std::string name_;
-  int actual_ = 1;
-  int max_ = 1;
-  bool powered_ = true;
+  int actual_{1};
+  int max_{1};
+  bool powered_{true};
 };
 
 class BacklightBackend {
@@ -87,7 +79,7 @@ class BacklightBackend {
 
   Glib::RefPtr<Gio::DBus::Proxy> login_proxy_;
 
-  static constexpr int EPOLL_MAX_EVENTS = 16;
+  static constexpr int EPOLL_MAX_EVENTS{16};
 };
 
-}  // namespace waybar::util
\ No newline at end of file
+}  // namespace waybar::util
diff --git a/meson.build b/meson.build
index 1fce8144..a9d16df6 100644
--- a/meson.build
+++ b/meson.build
@@ -86,6 +86,7 @@ sigcpp = dependency('sigc++-3.0', version: ['>=3.4.0'])
 gtkmm = dependency('gtkmm-4.0', version : ['>=4.12.0'])
 giounix = dependency('gio-unix-2.0', version: ['>=2.76.4'])
 spdlog = dependency('spdlog', version : ['>=1.10.0'], fallback : ['spdlog', 'spdlog_dep'], default_options : ['external_fmt=enabled'])
+libudev = dependency('libudev', required: get_option('libudev'))
 
 gtk_layer_shell = dependency('gtk4-layer-shell-0',
                              version : ['>=1.0.2'],
@@ -137,7 +138,8 @@ src_files = files(
      'src/ALabel.cpp',
      'src/factory.cpp',
      'src/util/ustring_clen.cpp',
-     'src/group.cpp'
+     'src/group.cpp',
+     'src/ASlider.cpp'
 )
 
 man_files = files(
@@ -166,6 +168,19 @@ if get_option('experimental')
     add_project_arguments('-DUSE_EXPERIMENTAL', language: 'cpp')
 endif
 
+if libudev.found() and (is_linux or libepoll.found())
+    add_project_arguments('-DHAVE_LIBUDEV', language: 'cpp')
+    src_files += files(
+        'src/modules/backlight.cpp',
+        'src/modules/backlight_slider.cpp',
+        'src/util/backlight_backend.cpp',
+    )
+    man_files += files(
+        'man/waybar-backlight.5.scd',
+        'man/waybar-backlight-slider.5.scd',
+    )
+endif
+
 cava = dependency('cava',
                   version : '>=0.10.1',
                   required: get_option('cava'),
@@ -189,6 +204,7 @@ executable(
         gtkmm,
         giounix,
         sigcpp,
+        libudev,
         jsoncpp,
         wayland_client,
         wayland_cursor,
diff --git a/src/AModule.cpp b/src/AModule.cpp
index 47533e4c..8d3fca9c 100644
--- a/src/AModule.cpp
+++ b/src/AModule.cpp
@@ -182,9 +182,9 @@ bool AModule::handleScroll(double dx, double dy) {
     std::string format{};
     const auto dir{getScrollDir(currEvent_)};
 
-    if (dir == SCROLL_DIR::UP)
+    if (dir == SCROLL_DIR::UP || dir == SCROLL_DIR::RIGHT)
       format = "on-scroll-up";
-    else if (dir == SCROLL_DIR::DOWN)
+    else if (dir == SCROLL_DIR::DOWN || dir == SCROLL_DIR::LEFT)
       format = "on-scroll-down";
 
     // First call module action
diff --git a/src/ASlider.cpp b/src/ASlider.cpp
index b434be30..0858dfc0 100644
--- a/src/ASlider.cpp
+++ b/src/ASlider.cpp
@@ -1,20 +1,18 @@
 #include "ASlider.hpp"
 
 #include "gtkmm/adjustment.h"
-#include "gtkmm/enums.h"
 
 namespace waybar {
 
 ASlider::ASlider(const Json::Value& config, const std::string& name, const std::string& id)
     : AModule(config, name, id, false, false),
       vertical_(config_["orientation"].asString() == "vertical"),
-      scale_(vertical_ ? Gtk::ORIENTATION_VERTICAL : Gtk::ORIENTATION_HORIZONTAL) {
+      scale_(vertical_ ? Gtk::Orientation::VERTICAL : Gtk::Orientation::HORIZONTAL) {
   scale_.set_name(name);
   if (!id.empty()) {
     scale_.get_style_context()->add_class(id);
   }
   scale_.get_style_context()->add_class(MODULE_CLASS);
-  event_box_.add(scale_);
   scale_.signal_value_changed().connect(sigc::mem_fun(*this, &ASlider::onValueChanged));
 
   if (config_["min"].isUInt()) {
@@ -32,4 +30,4 @@ ASlider::ASlider(const Json::Value& config, const std::string& name, const std::
 
 void ASlider::onValueChanged() {}
 
-}  // namespace waybar
\ No newline at end of file
+}  // namespace waybar
diff --git a/src/factory.cpp b/src/factory.cpp
index 13e19b64..2505204a 100644
--- a/src/factory.cpp
+++ b/src/factory.cpp
@@ -250,7 +250,7 @@ gtk4 todo
     if (ref == "network") {
       return new waybar::modules::Network(id, config_[name]);
     }
-#endif
+#endif*/
 #ifdef HAVE_LIBUDEV
     if (ref == "backlight") {
       return new waybar::modules::Backlight(id, config_[name]);
@@ -258,7 +258,7 @@ gtk4 todo
     if (ref == "backlight/slider") {
       return new waybar::modules::BacklightSlider(id, config_[name]);
     }
-#endif
+#endif/*
 #ifdef HAVE_LIBEVDEV
     if (ref == "keyboard-state") {
       return new waybar::modules::KeyboardState(id, bar_, config_[name]);
diff --git a/src/modules/backlight.cpp b/src/modules/backlight.cpp
index 4ae511eb..1e51da9b 100644
--- a/src/modules/backlight.cpp
+++ b/src/modules/backlight.cpp
@@ -1,27 +1,12 @@
 #include "modules/backlight.hpp"
 
 #include <fmt/format.h>
-#include <libudev.h>
-#include <spdlog/spdlog.h>
-#include <sys/epoll.h>
-#include <unistd.h>
-
-#include <algorithm>
-#include <chrono>
-#include <memory>
-
-#include "util/backend_common.hpp"
-#include "util/backlight_backend.hpp"
 
 waybar::modules::Backlight::Backlight(const std::string &id, const Json::Value &config)
-    : ALabel(config, "backlight", id, "{percent}%", 2),
+    : ALabel(config, "backlight", id, "{percent}%", 2, false, false, true),
       preferred_device_(config["device"].isString() ? config["device"].asString() : ""),
       backend(interval_, [this] { dp.emit(); }) {
   dp.emit();
-
-  // Set up scroll handler
-  event_box_.add_events(Gdk::SCROLL_MASK | Gdk::SMOOTH_SCROLL_MASK);
-  event_box_.signal_scroll_event().connect(sigc::mem_fun(*this, &Backlight::handleScroll));
 }
 
 auto waybar::modules::Backlight::update() -> void {
@@ -35,12 +20,12 @@ auto waybar::modules::Backlight::update() -> void {
     }
 
     if (best->get_powered()) {
-      event_box_.show();
+      Gtk::Label::show();
       const uint8_t percent =
           best->get_max() == 0 ? 100 : round(best->get_actual() * 100.0f / best->get_max());
       std::string desc = fmt::format(fmt::runtime(format_), fmt::arg("percent", percent),
                                      fmt::arg("icon", getIcon(percent)));
-      label_.set_markup(desc);
+      Gtk::Label::set_markup(desc);
       getState(percent);
       if (tooltipEnabled()) {
         std::string tooltip_format;
@@ -48,31 +33,31 @@ auto waybar::modules::Backlight::update() -> void {
           tooltip_format = config_["tooltip-format"].asString();
         }
         if (!tooltip_format.empty()) {
-          label_.set_tooltip_text(fmt::format(fmt::runtime(tooltip_format),
+          Gtk::Label::set_tooltip_text(fmt::format(fmt::runtime(tooltip_format),
                                               fmt::arg("percent", percent),
                                               fmt::arg("icon", getIcon(percent))));
         } else {
-          label_.set_tooltip_text(desc);
+          Gtk::Label::set_tooltip_text(desc);
         }
       }
     } else {
-      event_box_.hide();
+      Gtk::Label::hide();
     }
   } else {
     if (previous_best_device == nullptr) {
       return;
     }
-    label_.set_markup("");
+    Gtk::Label::set_markup("");
   }
   backend.set_previous_best_device(best);
   previous_format_ = format_;
   ALabel::update();
 }
 
-bool waybar::modules::Backlight::handleScroll(GdkEventScroll *e) {
+bool waybar::modules::Backlight::handleScroll(double dx, double dy) {
   // Check if the user has set a custom command for scrolling
   if (config_["on-scroll-up"].isString() || config_["on-scroll-down"].isString()) {
-    return AModule::handleScroll(e);
+    return AModule::handleScroll(dx, dy);
   }
 
   // Fail fast if the proxy could not be initialized
@@ -81,7 +66,7 @@ bool waybar::modules::Backlight::handleScroll(GdkEventScroll *e) {
   }
 
   // Check scroll direction
-  auto dir = AModule::getScrollDir(e);
+  auto dir = AModule::getScrollDir(controllScroll_->get_current_event());
 
   // No worries, it will always be set because of the switch below. This is purely to suppress a
   // warning
diff --git a/src/modules/backlight_slider.cpp b/src/modules/backlight_slider.cpp
index 6269dddb..09a178f7 100644
--- a/src/modules/backlight_slider.cpp
+++ b/src/modules/backlight_slider.cpp
@@ -1,6 +1,5 @@
-#include "modules/backlight_slider.hpp"
-
 #include "ASlider.hpp"
+#include "modules/backlight_slider.hpp"
 
 namespace waybar::modules {
 
@@ -20,4 +19,4 @@ void BacklightSlider::onValueChanged() {
   backend.set_scaled_brightness(preferred_device_, brightness);
 }
 
-}  // namespace waybar::modules
\ No newline at end of file
+}  // namespace waybar::modules
diff --git a/src/util/backlight_backend.cpp b/src/util/backlight_backend.cpp
index 1512103c..429f8a53 100644
--- a/src/util/backlight_backend.cpp
+++ b/src/util/backlight_backend.cpp
@@ -1,11 +1,9 @@
 #include "util/backlight_backend.hpp"
 
+#include <cmath>
 #include <fmt/core.h>
-#include <spdlog/spdlog.h>
 #include <sys/epoll.h>
 
-#include <optional>
-
 namespace {
 class FileDescriptor {
  public:
@@ -103,7 +101,7 @@ BacklightBackend::BacklightBackend(std::chrono::milliseconds interval,
 
   // Connect to the login interface
   login_proxy_ = Gio::DBus::Proxy::create_for_bus_sync(
-      Gio::DBus::BusType::BUS_TYPE_SYSTEM, "org.freedesktop.login1",
+      Gio::DBus::BusType::SYSTEM, "org.freedesktop.login1",
       "/org/freedesktop/login1/session/self", "org.freedesktop.login1.Session");
 
   udev_thread_ = [this] {
@@ -193,7 +191,7 @@ void BacklightBackend::set_scaled_brightness(std::string preferred_device, int b
 
   if (best != nullptr) {
     const auto max = best->get_max();
-    const auto abs_val = static_cast<int>(round(brightness * max / 100.0f));
+    const auto abs_val = static_cast<int>(std::round(brightness * max / 100.0f));
     set_brightness_internal(best->name(), abs_val, best->get_max());
   }
 }
@@ -205,7 +203,7 @@ void BacklightBackend::set_brightness(std::string preferred_device, ChangeType c
   if (best != nullptr) {
     const auto max = best->get_max();
 
-    const auto abs_step = static_cast<int>(round(step * max / 100.0f));
+    const auto abs_step = static_cast<int>(std::round(step * max / 100.0f));
 
     const int new_brightness = change_type == ChangeType::Increase ? best->get_actual() + abs_step
                                                                    : best->get_actual() - abs_step;
@@ -285,4 +283,4 @@ void BacklightBackend::enumerate_devices(ForwardIt first, ForwardIt last, Insert
   }
 }
 
-}  // namespace waybar::util
\ No newline at end of file
+}  // namespace waybar::util