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koreader/frontend/ui/widget/container/centercontainer.lua

26 lines
738 B
Lua

local WidgetContainer = require("ui/widget/container/widgetcontainer")
--[[
CenterContainer centers its content (1 widget) within its own dimensions
--]]
local CenterContainer = WidgetContainer:new()
function CenterContainer:paintTo(bb, x, y)
local contentSize = self[1]:getSize()
if contentSize.w > self.dimen.w or contentSize.h > self.dimen.h then
-- throw error? paint to scrap buffer and blit partially?
-- for now, we ignore this
end
local x_pos = x
local y_pos = y
if self.ignore ~= "height" then
y_pos = y + math.floor((self.dimen.h - contentSize.h)/2)
end
if self.ignore ~= "width" then
x_pos = x + math.floor((self.dimen.w - contentSize.w)/2)
end
self[1]:paintTo(bb, x_pos, y_pos)
end
return CenterContainer