read ID from a button press

local ButtonPress_processEffect = function(event)

local id = event.id
print ("id:".. id)
-- print ("ActiveEffect:" .. ActiveEffect)
-- shape1.fill.effect = "filter.".. ActiveEffect
print ("well we are here...")
end

local function EffectMenu()

--display.setDrawMode( "default" )
print ("effect menu")

ButtonGroup_Effects= display.newGroup()

Btn_Effects_Pixel = widget.newButton
{
    id = "pixelate",
    defaultFile = "images/Btn_Effect_Pixel_Up.png",
    overFile = "images/Btn_Effect_Pixel_Down.png",
    label = "PIXEL",
    settings =
    {
        min=2, max=20, startAt=20
    },
    labelColor =
    {
        default = { 1, 1, 1 },
    },
    fontSize = 12,
    emboss = true,
    onPress = ButtonPress_processEffect,
    labelYOffset = 40
}