Check MouseWheel Up or Down

[beo6]

Hello, i have a small problem to recognize if i moved the mousewheel up or down.

 

i get the mouse z value by:

local mouseWheelPos = window:GetMousePosition().z
System:Print("Mouse wheel: "..mouseWheelPos)

 

but i noticed that the value i get out of it always goes up. Only when a overflow happens the value swaps to a negative value.

 

The only difference is that the value goes up a lot more when scrolling down (35725856).

When scrolling up the value only goes up for a smaller amount (65536)

 

i could check for that amount but i am not convinced that this is constant for every mouse out there and it looks a bit odd to me.

 

 

Has anyone more knowledge?

Thanks

[beo6]

ok. checking if the value changed about that amount is not reliable.

 

i also have sometimes the value change about 35725848 when scrolling down.

 

//Edit:

 

here is a function that seems to work for me.

Script.mouseWheel = 0
Script.wheelUp = 65536
Script.wheelDown = 35725848
function Script:GetMouseWheelDirection()
local context = Context:GetCurrent()
local window = context:GetWindow()
local wheelReturn = 0
local mouseWheelPos = window:GetMousePosition().z
if (self.mouseWheel ~= mouseWheelPos) then
 if ( mouseWheelPos > self.mouseWheel+self.wheelUp ) then
  wheelReturn = 1
  System:Print("Mouse wheel DOWN! ")
 elseif ( mouseWheelPos < self.mouseWheel+self.wheelDown ) then
  wheelReturn = 2
  System:Print("Mouse wheel UP! ")
 end
 self.mouseWheel = mouseWheelPos
end
return wheelReturn
end

 

It returns 0 when the wheel position didn't changed and 1 for Down or 2 for Up.

 

Maybe there is a better way. I will have to check if it works on other PCs etc.

Edited January 24, 2014 by beo6