The API is no longer being updated here until further notice.

Returns the region's opacity.

alpha = Region:GetAlpha()
effectiveAlpha = Frame:GetEffectiveAlpha()

Returns

alpha

number [0.0 - 1.0] - The alpha of the region. 0 is fully transparent, 1 is fully opaque.

effectiveAlpha

number [0.0 - 1.0] - The effective alpha after propagating from the parent region. This is equal to f:GetAlpha() * f:GetParent():GetAlpha()

Example

Alpha propagates from a region to its children, unless disabled with SetIgnoreParentAlpha.

local parent = CreateFrame("Frame")
parent:SetAlpha(0.5)

local f = CreateFrame("Frame", nil, parent)
f:SetAlpha(0.5)
print(f:GetAlpha())          -- 0.50196081399918
print(f:GetEffectiveAlpha()) -- 0.25098040699959

f:SetIgnoreParentAlpha(true)
print(f:GetEffectiveAlpha()) -- 0.50196081399918

Patch changes

• Patch 2.1.0 (2007-05-22): Added GetEffectiveAlpha^[1]

  "Frame alpha now propagates in the same way as scale (though is clamped between 0 and 1 on each object). This means you can cleanly fade the whole UI or specific frame assemblies."
  

References