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67 lines
2.4 KiB
67 lines
2.4 KiB
--[[
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On the theory that the mouse can only interact with one element on the screen at
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a time, there's no need for every element to always define its own highlight.
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rematch:ShowTextureHighlight(texture) will parent a shared frame to the texture's
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parent, then make the frame's texture the same as the given texture, but with
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alphaMode "ADD", causing the texture to light up.
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Use rematch:HideTextureHighlight() to remove it.
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CompositeButtons use this method to highlight its textures, but with its own frame.
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TODO: Make CompositeButtons use this instead and add UpdateTextureHighlight to
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the postUpdateFuncs of its scrollframes.
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]]
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local _,L = ...
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local rematch = Rematch
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local highlight = CreateFrame("Frame",nil,UIParent,"RematchUseParentLevel")
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highlight:SetSize(32,32)
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highlight:EnableMouse(false)
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highlight:Hide()
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highlight.Overlay = highlight:CreateTexture(nil,"OVERLAY")
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highlight.Overlay:SetAllPoints(true)
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highlight.Overlay:SetAlpha(0.75) -- adjust this to control "brightness"
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highlight.Overlay:SetBlendMode("ADD")
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local currentTexture -- the texture currently being highlighted
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function rematch:ShowTextureHighlight(texture)
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local parent = texture and texture:GetParent()
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if parent then
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currentTexture = texture
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highlight:SetParent(parent)
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highlight:SetPoint("TOPLEFT",texture,"TOPLEFT")
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highlight:SetPoint("BOTTOMRIGHT",texture,"BOTTOMRIGHT")
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highlight.Overlay:SetTexture(texture:GetTexture())
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highlight.Overlay:SetTexCoord(texture:GetTexCoord())
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highlight.Overlay:SetDesaturated(texture:IsDesaturated())
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highlight.Overlay:SetVertexColor(texture:GetVertexColor())
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highlight:Show()
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else
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currentTexture = nil
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end
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end
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function rematch:HideTextureHighlight()
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currentTexture = nil
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highlight:Hide()
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end
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-- call this when the contents of the button/texture may change to update the highlight
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function rematch:UpdateTextureHighlight()
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if currentTexture then
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if currentTexture:IsVisible() then -- if texture still on screen, update it
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highlight.Overlay:SetTexture(currentTexture:GetTexture())
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highlight.Overlay:SetTexCoord(currentTexture:GetTexCoord())
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highlight:Show()
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else -- underlying texture no longer on screen, hide highlight but don't nil
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-- currentTexture in case the underlying texture is shown later (this is
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-- to fix the problem of a highlight no longer updating on mouseover scrolling)
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highlight:Hide()
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end
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end
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end
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