love.wheelmoved
Available since LÖVE 0.10.0 |
This function is not supported in earlier versions. |
Callback function triggered when the mouse wheel is moved.
Contents
Function
Synopsis
love.wheelmoved( x, y )
Arguments
number x
- Amount of horizontal mouse wheel movement. Positive values indicate movement to the right.
number y
- Amount of vertical mouse wheel movement. Positive values indicate upward movement.
Returns
Nothing.
Examples
local text = ""
function love.wheelmoved(x, y)
if y > 0 then
text = "Mouse wheel moved up"
elseif y < 0 then
text = "Mouse wheel moved down"
end
end
function love.draw()
love.graphics.print(text, 10, 10)
end
Smooth scrolling
local posx, posy = love.graphics.getWidth() * 0.5, love.graphics.getHeight() * 0.5
local velx, vely = 0, 0 -- The scroll velocity
function love.draw()
love.graphics.rectangle( 'line', posx, posy, 50, 50 )
end
function love.update( dt )
posx = posx + velx
posy = posy + vely
-- Gradually reduce the velocity to create smooth scrolling effect.
velx = velx * 0.95
vely = vely * 0.95
end
function love.wheelmoved( dx, dy )
velx = velx + dx
vely = vely + dy
end
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