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The way to detect the mouse scroll wheel in Gosu is as follows:
require 'gosu'
class MyGame < Gosu::Window
def initialize
super(800, 600)
# Your initialization code here
end
def button_down(id)
case id
when Gosu::MsWheelDown
puts "Scrolling down"
# Handle scrolling down logic here
when Gosu::MsWheelUp
puts "Scrolling up"
# Handle scrolling up logic here
else
super
end
end
def update
# Your update logic here
end
def draw
# Your drawing logic here
end
end
MyGame.new.show