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

36 lines
1000 B
Lua

--[[--
CenterContainer centers its content (1 widget) within its own dimensions
--]]
local WidgetContainer = require("ui/widget/container/widgetcontainer")
local CenterContainer = WidgetContainer:new()
function CenterContainer:paintTo(bb, x, y)
local content_size = self[1]:getSize()
-- check if content is bigger than container
if self.ignore_if_over == "height" then -- align upper borders
if self.dimen.h < content_size.h then
self.ignore = "height"
end
end
if self.ignore_if_over == "width" then -- align left borders
if self.dimen.w < content_size.w then
self.ignore = "width"
end
end
local x_pos = x
local y_pos = y
if self.ignore ~= "height" then
y_pos = y + math.floor((self.dimen.h - content_size.h)/2)
end
if self.ignore ~= "width" then
x_pos = x + math.floor((self.dimen.w - content_size.w)/2)
end
self[1]:paintTo(bb, x_pos, y_pos)
end
return CenterContainer