From da349607a3da9fa9f347f12f07f752e39c80f57d Mon Sep 17 00:00:00 2001
From: Sam Atkins <atkinssj@serenityos.org>
Date: Mon, 8 Jan 2024 17:43:09 +0000
Subject: [PATCH] LibGUI: Make NumericInput respond to the mouse wheel

Scroll the mouse wheel over a NumericInput to quickly change the value.
This matches the SpinBox behavior.
---
 Userland/Libraries/LibGUI/NumericInput.cpp | 9 +++++++++
 Userland/Libraries/LibGUI/NumericInput.h   | 2 ++
 2 files changed, 11 insertions(+)

diff --git a/Userland/Libraries/LibGUI/NumericInput.cpp b/Userland/Libraries/LibGUI/NumericInput.cpp
index 1e6c5d7c87..518db3b02d 100644
--- a/Userland/Libraries/LibGUI/NumericInput.cpp
+++ b/Userland/Libraries/LibGUI/NumericInput.cpp
@@ -90,4 +90,13 @@ void NumericInput::set_current_number(i64 number, GUI::AllowCallback allow_callb
         on_number_changed(m_current_number);
 }
 
+void NumericInput::mousewheel_event(GUI::MouseEvent& event)
+{
+    auto wheel_delta = event.wheel_delta_y() / abs(event.wheel_delta_y());
+    if (event.modifiers() == KeyModifier::Mod_Ctrl)
+        wheel_delta *= 6;
+    set_current_number(m_current_number - wheel_delta);
+    event.accept();
+}
+
 }
diff --git a/Userland/Libraries/LibGUI/NumericInput.h b/Userland/Libraries/LibGUI/NumericInput.h
index fb9e0a3f09..cde7e8ea78 100644
--- a/Userland/Libraries/LibGUI/NumericInput.h
+++ b/Userland/Libraries/LibGUI/NumericInput.h
@@ -22,6 +22,8 @@ public:
     void set_max_number(i64 number);
     void set_current_number(i64 number, GUI::AllowCallback allow_callback = GUI::AllowCallback::Yes);
 
+    virtual void mousewheel_event(GUI::MouseEvent&) override;
+
 private:
     NumericInput();
     void on_focus_lost();