From 14b51253c028aad14315cd854862f920e9156489 Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Sat, 29 Jun 2019 09:27:55 +0200
Subject: [PATCH] WindowServer: Allow changing window opacity with
 Logo+MouseWheel.

This is just a silly little feature that I thought was a bit neat. :^)
---
 Servers/WindowServer/WSWindowManager.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Servers/WindowServer/WSWindowManager.cpp b/Servers/WindowServer/WSWindowManager.cpp
index ade735ef2e..a942b3a5dd 100644
--- a/Servers/WindowServer/WSWindowManager.cpp
+++ b/Servers/WindowServer/WSWindowManager.cpp
@@ -723,6 +723,17 @@ void WSWindowManager::process_mouse_event(WSMouseEvent& event, WSWindow*& hovere
                 start_window_resize(window, event);
                 return IterationDecision::Break;
             }
+            if (m_keyboard_modifiers == Mod_Logo && event.type() == WSEvent::MouseWheel) {
+                float opacity_change = -event.wheel_delta() * 0.05f;
+                float new_opacity = window.opacity() + opacity_change;
+                if (new_opacity < 0.05f)
+                    new_opacity = 0.05f;
+                if (new_opacity > 1.0f)
+                    new_opacity = 1.0f;
+                window.set_opacity(new_opacity);
+                window.invalidate();
+                return IterationDecision::Break;
+            }
         }
         // Well okay, let's see if we're hitting the frame or the window inside the frame.
         if (window.rect().contains(event.position())) {