diff --git a/src/app/commands/cmd_change_pixel_format.cpp b/src/app/commands/cmd_change_pixel_format.cpp
index 2819a90f9..c3b56a013 100644
--- a/src/app/commands/cmd_change_pixel_format.cpp
+++ b/src/app/commands/cmd_change_pixel_format.cpp
@@ -244,7 +244,7 @@ public:
       factor()->Change.connect([this]{ onIndexParamChange(); });
 
       advancedCheck()->Click.connect(
-        [this](ui::Event&){
+        [this](){
           advanced()->setVisible(advancedCheck()->isSelected());
           expandWindow(sizeHint());
         });
diff --git a/src/app/commands/cmd_color_quantization.cpp b/src/app/commands/cmd_color_quantization.cpp
index 8965407f2..1fcf01d5d 100644
--- a/src/app/commands/cmd_color_quantization.cpp
+++ b/src/app/commands/cmd_color_quantization.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019-2021  Igara Studio S.A.
+// Copyright (C) 2019-2023  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -49,7 +49,7 @@ public:
     rgbmapAlgorithmPlaceholder()->addChild(&m_algoSelector);
 
     advancedCheck()->Click.connect(
-      [this](ui::Event&){
+      [this](){
         advanced()->setVisible(advancedCheck()->isSelected());
         expandWindow(sizeHint());
       });
diff --git a/src/app/commands/cmd_options.cpp b/src/app/commands/cmd_options.cpp
index b54c8ad75..7d2343cf9 100644
--- a/src/app/commands/cmd_options.cpp
+++ b/src/app/commands/cmd_options.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2022  Igara Studio S.A.
+// Copyright (C) 2018-2023  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -327,7 +327,7 @@ public:
     if (m_pref.general.dataRecovery())
       enableDataRecovery()->setSelected(true);
     enableDataRecovery()->Click.connect(
-      [this](Event&){
+      [this](){
         const bool state = enableDataRecovery()->isSelected();
         keepEditedSpriteData()->setEnabled(state);
         keepEditedSpriteData()->setSelected(state);
diff --git a/src/app/commands/cmd_sprite_properties.cpp b/src/app/commands/cmd_sprite_properties.cpp
index 6377e3654..86b413701 100644
--- a/src/app/commands/cmd_sprite_properties.cpp
+++ b/src/app/commands/cmd_sprite_properties.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2022  Igara Studio S.A.
+// Copyright (C) 2018-2023  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -201,7 +201,7 @@ void SpritePropertiesCommand::onExecute(Context* context)
     window.colorProfile()->Change.connect(updateButtons);
 
     window.assignColorProfile()->Click.connect(
-      [&](Event&){
+      [&](){
         selectedColorProfile = window.colorProfile()->getSelectedItemIndex();
 
         ContextWriter writer(context);
@@ -214,7 +214,7 @@ void SpritePropertiesCommand::onExecute(Context* context)
         updateButtons();
       });
     window.convertColorProfile()->Click.connect(
-      [&](Event&){
+      [&](){
         selectedColorProfile = window.colorProfile()->getSelectedItemIndex();
 
         ContextWriter writer(context);
diff --git a/src/app/commands/filters/filter_window.cpp b/src/app/commands/filters/filter_window.cpp
index d86be92f1..6b0a1b284 100644
--- a/src/app/commands/filters/filter_window.cpp
+++ b/src/app/commands/filters/filter_window.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2020  Igara Studio S.A.
+// Copyright (C) 2020-2023  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -150,17 +150,17 @@ void FilterWindow::setNewTarget(Target target)
   m_targetButton.setTarget(target);
 }
 
-void FilterWindow::onOk(Event& ev)
+void FilterWindow::onOk()
 {
   m_okButton.closeWindow();
 }
 
-void FilterWindow::onCancel(Event& ev)
+void FilterWindow::onCancel()
 {
   m_cancelButton.closeWindow();
 }
 
-void FilterWindow::onShowPreview(Event& ev)
+void FilterWindow::onShowPreview()
 {
   restartPreview();
 
diff --git a/src/app/commands/filters/filter_window.h b/src/app/commands/filters/filter_window.h
index 449891c89..f9c5e205e 100644
--- a/src/app/commands/filters/filter_window.h
+++ b/src/app/commands/filters/filter_window.h
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2022  Igara Studio S.A.
+// Copyright (C) 2022-2023  Igara Studio S.A.
 // Copyright (C) 2001-2017  David Capello
 //
 // This program is distributed under the terms of
@@ -52,9 +52,9 @@ namespace app {
     // Returns the container where derived classes should put controls.
     ui::Widget* getContainer() { return &m_container; }
 
-    void onOk(ui::Event& ev);
-    void onCancel(ui::Event& ev);
-    void onShowPreview(ui::Event& ev);
+    void onOk();
+    void onCancel();
+    void onShowPreview();
     void onTargetButtonChange();
     void onTiledChange();
 
diff --git a/src/app/script/dialog_class.cpp b/src/app/script/dialog_class.cpp
index 713c3f1d6..ad4158e71 100644
--- a/src/app/script/dialog_class.cpp
+++ b/src/app/script/dialog_class.cpp
@@ -558,7 +558,7 @@ int Dialog_button_base(lua_State* L, T** outputWidget = nullptr)
       auto dlg = get_obj<Dialog>(L, 1);
       Dialog_connect_signal(
         L, 1, widget->Click,
-        [dlg, widget](lua_State* L, Event&){
+        [dlg, widget](lua_State* L){
           if (widget->type() == ui::kButtonWidget)
             dlg->lastButton = widget;
         });
diff --git a/src/app/script/security.cpp b/src/app/script/security.cpp
index 477b98860..934682e79 100644
--- a/src/app/script/security.cpp
+++ b/src/app/script/security.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019-2021  Igara Studio S.A.
+// Copyright (C) 2019-2023  Igara Studio S.A.
 // Copyright (C) 2018  David Capello
 //
 // This program is distributed under the terms of
@@ -167,7 +167,7 @@ bool ask_access(lua_State* L,
       });
 
     dlg.full()->Click.connect(
-      [&dlg, &allowButtonText](ui::Event&){
+      [&dlg, &allowButtonText](){
         if (dlg.full()->isSelected()) {
           dlg.dontShow()->setSelected(true);
           dlg.dontShow()->setEnabled(false);
diff --git a/src/app/ui/aseprite_update.cpp b/src/app/ui/aseprite_update.cpp
index 4e4e44994..29ac4ada4 100644
--- a/src/app/ui/aseprite_update.cpp
+++ b/src/app/ui/aseprite_update.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2021  Igara Studio S.A.
+// Copyright (C) 2021-2023  Igara Studio S.A.
 //
 // This program is distributed under the terms of
 // the End-User License Agreement for Aseprite.
@@ -22,8 +22,7 @@ AsepriteUpdate::AsepriteUpdate(std::string version)
   , m_timer(500, this)
 {
   okButton()->setEnabled(false);
-  okButton()->Click.connect([this](ui::Event&) {
-                            });
+  okButton()->Click.connect([this]() { });
   m_timer.Tick.connect([this] { this->onTimerTick(); });
 
   log(base::string_printf("Downloading Aseprite %s...", version.c_str()));
@@ -213,4 +212,4 @@ void AsepriteUpdate::log(std::string text)
   layout();
 }
 
-}
\ No newline at end of file
+}
diff --git a/src/app/ui/color_button.cpp b/src/app/ui/color_button.cpp
index 06f083e1e..85767706c 100644
--- a/src/app/ui/color_button.cpp
+++ b/src/app/ui/color_button.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2020-2022  Igara Studio S.A.
+// Copyright (C) 2020-2023  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -295,9 +295,9 @@ void ColorButton::onPaint(PaintEvent& ev)
   g->drawUIText(text(), textcolor, gfx::ColorNone, textrc.origin(), 0);
 }
 
-void ColorButton::onClick(Event& ev)
+void ColorButton::onClick()
 {
-  ButtonBase::onClick(ev);
+  ButtonBase::onClick();
 
   // If the popup window was not created or shown yet..
   if (!m_window || !m_window->isVisible()) {
diff --git a/src/app/ui/color_button.h b/src/app/ui/color_button.h
index 2400225df..32bec4e51 100644
--- a/src/app/ui/color_button.h
+++ b/src/app/ui/color_button.h
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2021  Igara Studio S.A.
+// Copyright (C) 2021-2023  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -57,7 +57,7 @@ namespace app {
     bool onProcessMessage(ui::Message* msg) override;
     void onSizeHint(ui::SizeHintEvent& ev) override;
     void onPaint(ui::PaintEvent& ev) override;
-    void onClick(ui::Event& ev) override;
+    void onClick() override;
     void onStartDrag() override;
     void onSelectWhenDragging() override;
     void onLoadLayout(ui::LoadLayoutEvent& ev) override;
diff --git a/src/app/ui/color_popup.cpp b/src/app/ui/color_popup.cpp
index a21f2188c..6419c80a4 100644
--- a/src/app/ui/color_popup.cpp
+++ b/src/app/ui/color_popup.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2020-2022  Igara Studio S.A.
+// Copyright (C) 2020-2023  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -66,7 +66,7 @@ public:
     }
 
   private:
-    void onClick(Event& ev) override {
+    void onClick() override {
       m_colorPopup->setColorWithSignal(m_color, ChangeType);
     }
 
diff --git a/src/app/ui/context_bar.cpp b/src/app/ui/context_bar.cpp
index b72a97c8c..d0b3e6100 100644
--- a/src/app/ui/context_bar.cpp
+++ b/src/app/ui/context_bar.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2022  Igara Studio S.A.
+// Copyright (C) 2018-2023  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -366,8 +366,8 @@ protected:
     setStyle(SkinTheme::get(this)->styles.miniCheckBox());
   }
 
-  void onClick(Event& ev) override {
-    CheckBox::onClick(ev);
+  void onClick() override {
+    CheckBox::onClick();
 
     Tool* tool = App::instance()->activeTool();
     Preferences::instance().tool(tool).contiguous(isSelected());
@@ -904,7 +904,7 @@ private:
     buttonset.setSelectedItem(int(pos));
 
     visible.Click.connect(
-      [&visible](Event&){
+      [&visible](){
         Preferences::instance().selection.pivotVisibility(
           visible.isSelected());
       });
@@ -1249,8 +1249,8 @@ protected:
     setStyle(SkinTheme::get(this)->styles.miniCheckBox());
   }
 
-  void onClick(Event& ev) override {
-    CheckBox::onClick(ev);
+  void onClick() override {
+    CheckBox::onClick();
 
     Tool* tool = App::instance()->activeTool();
     Preferences::instance().tool(tool).freehandAlgorithm(
@@ -1386,8 +1386,8 @@ protected:
     setStyle(SkinTheme::get(this)->styles.miniCheckBox());
   }
 
-  void onClick(Event& ev) override {
-    CheckBox::onClick(ev);
+  void onClick() override {
+    CheckBox::onClick();
 
     auto atm = App::instance()->activeToolManager();
     if (atm->quickTool() &&
diff --git a/src/app/ui/drop_down_button.cpp b/src/app/ui/drop_down_button.cpp
index aa6a5ab71..b66320faf 100644
--- a/src/app/ui/drop_down_button.cpp
+++ b/src/app/ui/drop_down_button.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2022  Igara Studio S.A.
+// Copyright (C) 2022-2023  Igara Studio S.A.
 // Copyright (C) 2001-2017  David Capello
 //
 // This program is distributed under the terms of
@@ -44,13 +44,13 @@ DropDownButton::DropDownButton(const char* text)
   initTheme();
 }
 
-void DropDownButton::onButtonClick(Event& ev)
+void DropDownButton::onButtonClick()
 {
   // Fire "Click" signal.
   Click();
 }
 
-void DropDownButton::onDropDownButtonClick(Event& ev)
+void DropDownButton::onDropDownButtonClick()
 {
   DropDownClick();
 }
diff --git a/src/app/ui/drop_down_button.h b/src/app/ui/drop_down_button.h
index 055966ab8..2070def15 100644
--- a/src/app/ui/drop_down_button.h
+++ b/src/app/ui/drop_down_button.h
@@ -1,4 +1,5 @@
 // Aseprite
+// Copyright (C) 2023  Igara Studio S.A.
 // Copyright (C) 2001-2016  David Capello
 //
 // This program is distributed under the terms of
@@ -29,8 +30,8 @@ namespace app {
     obs::signal<void()> DropDownClick;
 
   protected:
-    void onButtonClick(ui::Event& ev);
-    void onDropDownButtonClick(ui::Event& ev);
+    void onButtonClick();
+    void onDropDownButtonClick();
 
   private:
     ui::Button* m_button;
diff --git a/src/app/ui/enter_license.cpp b/src/app/ui/enter_license.cpp
index fe48378cd..7eb8a5220 100644
--- a/src/app/ui/enter_license.cpp
+++ b/src/app/ui/enter_license.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2021  Igara Studio S.A.
+// Copyright (C) 2021-2023  Igara Studio S.A.
 //
 // This program is distributed under the terms of
 // the End-User License Agreement for Aseprite.
@@ -32,7 +32,7 @@ EnterLicense::EnterLicense() : m_timer(500, this), m_activationInProgress(false)
   });
 
   okButton()->setEnabled(false);
-  okButton()->Click.connect([this](ui::Event&) {
+  okButton()->Click.connect([this]() {
     startActivation();
   });
 
@@ -108,4 +108,4 @@ void EnterLicense::showSuccess()
   m_activationInProgress = false;
 }
 
-}
\ No newline at end of file
+}
diff --git a/src/app/ui/notifications.cpp b/src/app/ui/notifications.cpp
index b4c2fc28e..a24f95a89 100644
--- a/src/app/ui/notifications.cpp
+++ b/src/app/ui/notifications.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2020-2022  Igara Studio S.A.
+// Copyright (C) 2020-2023  Igara Studio S.A.
 // Copyright (C) 2001-2017  David Capello
 //
 // This program is distributed under the terms of
@@ -70,7 +70,7 @@ void Notifications::onPaint(PaintEvent& ev)
     g, m_flagStyle, clientBounds(), info);
 }
 
-void Notifications::onClick(ui::Event& ev)
+void Notifications::onClick()
 {
   m_red = false;
   invalidate();
diff --git a/src/app/ui/notifications.h b/src/app/ui/notifications.h
index 31e8ffef9..03141434e 100644
--- a/src/app/ui/notifications.h
+++ b/src/app/ui/notifications.h
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2020  Igara Studio S.A.
+// Copyright (C) 2020-2023  Igara Studio S.A.
 // Copyright (C) 2001-2017  David Capello
 //
 // This program is distributed under the terms of
@@ -29,7 +29,7 @@ namespace app {
   protected:
     void onSizeHint(ui::SizeHintEvent& ev) override;
     void onPaint(ui::PaintEvent& ev) override;
-    void onClick(ui::Event& ev) override;
+    void onClick() override;
 
   private:
     ui::Style* m_flagStyle;
diff --git a/src/app/ui/palettes_listbox.cpp b/src/app/ui/palettes_listbox.cpp
index 6ee7717aa..dac696934 100644
--- a/src/app/ui/palettes_listbox.cpp
+++ b/src/app/ui/palettes_listbox.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2020-2022  Igara Studio S.A.
+// Copyright (C) 2020-2023  Igara Studio S.A.
 // Copyright (C) 2001-2017  David Capello
 //
 // This program is distributed under the terms of
@@ -74,8 +74,8 @@ class PalettesListItem : public ResourceListItem {
       setBgColor(theme->colors.listitemNormalFace());
     }
 
-    void onClick(Event& ev) override {
-      IconButton::onClick(ev);
+    void onClick() override {
+      IconButton::onClick();
 
       std::string::size_type j, i = m_comment.find("http");
       if (i != std::string::npos) {
diff --git a/src/app/ui/preview_editor.cpp b/src/app/ui/preview_editor.cpp
index fe2a6988d..d21609719 100644
--- a/src/app/ui/preview_editor.cpp
+++ b/src/app/ui/preview_editor.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2018-2022  Igara Studio S.A.
+// Copyright (C) 2018-2023  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This program is distributed under the terms of
@@ -114,11 +114,11 @@ private:
     setupIcons();
   }
 
-  void onClick(Event& ev) override {
+  void onClick() override {
     m_isPlaying = !m_isPlaying;
     setupIcons();
 
-    Button::onClick(ev);
+    Button::onClick();
   }
 
   void onSetDecorativeWidgetBounds() override {
diff --git a/src/app/ui/task_widget.cpp b/src/app/ui/task_widget.cpp
index 343f3c6c2..fd6eaa59f 100644
--- a/src/app/ui/task_widget.cpp
+++ b/src/app/ui/task_widget.cpp
@@ -1,5 +1,5 @@
 // Aseprite
-// Copyright (C) 2019-2022  Igara Studio S.A.
+// Copyright (C) 2019-2023  Igara Studio S.A.
 //
 // This program is distributed under the terms of
 // the End-User License Agreement for Aseprite.
@@ -33,7 +33,7 @@ TaskWidget::TaskWidget(const Type type,
     addChild(&m_cancelButton);
 
     m_cancelButton.Click.connect(
-      [this](Event&){
+      [this](){
         m_task.cancel();
         m_cancelButton.setEnabled(false);
         m_progressBar.setEnabled(false);
diff --git a/src/ui/button.cpp b/src/ui/button.cpp
index 40c5a8591..2c52fe2be 100644
--- a/src/ui/button.cpp
+++ b/src/ui/button.cpp
@@ -1,5 +1,5 @@
 // Aseprite UI Library
-// Copyright (C) 2019-2021  Igara Studio S.A.
+// Copyright (C) 2019-2023  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This file is released under the terms of the MIT license.
@@ -50,10 +50,10 @@ WidgetType ButtonBase::behaviorType() const
   return m_behaviorType;
 }
 
-void ButtonBase::onClick(Event& ev)
+void ButtonBase::onClick()
 {
   // Fire Click() signal
-  Click(ev);
+  Click();
 }
 
 bool ButtonBase::onProcessMessage(Message* msg)
@@ -147,8 +147,7 @@ bool ButtonBase::onProcessMessage(Message* msg)
 
           case kCheckWidget: {
             // Fire onClick() event
-            Event ev(this);
-            onClick(ev);
+            onClick();
             return true;
           }
 
@@ -212,8 +211,7 @@ bool ButtonBase::onProcessMessage(Message* msg)
             case kCheckWidget:
               {
                 // Fire onClick() event
-                Event ev(this);
-                onClick(ev);
+                onClick();
 
                 invalidate();
               }
@@ -225,8 +223,7 @@ bool ButtonBase::onProcessMessage(Message* msg)
                 setSelected(true);
 
                 // Fire onClick() event
-                Event ev(this);
-                onClick(ev);
+                onClick();
               }
               break;
           }
@@ -260,8 +257,7 @@ void ButtonBase::generateButtonSelectSignal()
   setSelected(false);
 
   // Fire onClick() event
-  Event ev(this);
-  onClick(ev);
+  onClick();
 }
 
 void ButtonBase::onStartDrag()
diff --git a/src/ui/button.h b/src/ui/button.h
index d30af6e8a..20663fd50 100644
--- a/src/ui/button.h
+++ b/src/ui/button.h
@@ -1,5 +1,5 @@
 // Aseprite UI Library
-// Copyright (C) 2021  Igara Studio S.A.
+// Copyright (C) 2021-2023  Igara Studio S.A.
 // Copyright (C) 2001-2018  David Capello
 //
 // This file is released under the terms of the MIT license.
@@ -33,14 +33,14 @@ namespace ui {
 
     WidgetType behaviorType() const;
     // Signals
-    obs::signal<void(Event&)> Click;
+    obs::signal<void()> Click;
 
   protected:
     // Events
     bool onProcessMessage(Message* msg) override;
 
     // New events
-    virtual void onClick(Event& ev);
+    virtual void onClick();
     virtual void onStartDrag();
     virtual void onSelectWhenDragging();
 
diff --git a/src/ui/combobox.cpp b/src/ui/combobox.cpp
index d36be4832..9e3d33820 100644
--- a/src/ui/combobox.cpp
+++ b/src/ui/combobox.cpp
@@ -1,5 +1,5 @@
 // Aseprite UI Library
-// Copyright (C) 2018-2022  Igara Studio S.A.
+// Copyright (C) 2018-2023  Igara Studio S.A.
 // Copyright (C) 2001-2017  David Capello
 //
 // This file is released under the terms of the MIT license.
@@ -632,7 +632,7 @@ void ComboBoxListBox::onChange()
 }
 
 // When the mouse is clicked we switch the visibility-status of the list-box
-void ComboBox::onButtonClick(Event& ev)
+void ComboBox::onButtonClick()
 {
   switchListBox();
 }
diff --git a/src/ui/combobox.h b/src/ui/combobox.h
index 42c2841f8..3873b7215 100644
--- a/src/ui/combobox.h
+++ b/src/ui/combobox.h
@@ -1,5 +1,5 @@
 // Aseprite UI Library
-// Copyright (C) 2019-2021  Igara Studio S.A.
+// Copyright (C) 2019-2023  Igara Studio S.A.
 // Copyright (C) 2001-2017  David Capello
 //
 // This file is released under the terms of the MIT license.
@@ -115,7 +115,7 @@ namespace ui {
 
   private:
     void updateListBoxPos();
-    void onButtonClick(Event& ev);
+    void onButtonClick();
     void filterMessages();
     void removeMessageFilters();
     void putSelectedItemAsCustomWidget();
diff --git a/src/ui/window.cpp b/src/ui/window.cpp
index bd322db3a..0ee806f23 100644
--- a/src/ui/window.cpp
+++ b/src/ui/window.cpp
@@ -70,8 +70,8 @@ public:
 
 protected:
 
-  void onClick(Event& ev) override {
-    ButtonBase::onClick(ev);
+  void onClick() override {
+    ButtonBase::onClick();
     closeWindow();
   }