fc2d5c862a
variables `x` and `y` shadowed the parameters, and `containerX`, `containerY`, `containerWidth` and `containerHeight` were used without being initialized. they could be replaced by the parameters `width` and `height`
75 lines
1.5 KiB
Lua
75 lines
1.5 KiB
Lua
local path = string.sub(..., 1, string.len(...) - string.len(".container"))
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local layout = require(path .. '.layout')
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---@class Container
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local container = {}
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container.__index = container
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---Positions an element within a container
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---@param halign "'left'"|"'center'"|"'right'"|"'stretch'"
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---@param valign "'top'"|"'center'"|"'bottom'"|"'stretch'"
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---@return layout
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function container.new(halign, valign)
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local self = setmetatable({
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halign = halign or 'left',
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valign = valign or 'top',
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}, container)
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return layout(self, self.draw)
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end
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local function alignLeft(x, wroot, wchild)
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return x
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end
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local function alignCenter(x, wroot, wchild)
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return x + (wroot / 2 - wchild / 2)
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end
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local function alignRight(x, wroot, wchild)
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return x + (wroot - wchild)
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end
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local function alignHandlerX(mode, x, wr, wc)
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if mode == 'center' then
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return alignCenter(x, wr, wc)
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elseif mode == 'right' then
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return alignRight(x, wr, wc)
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else
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return alignLeft(x)
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end
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end
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local function alignHandlerY(mode, y, hr, hc)
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if mode == 'center' then
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return alignCenter(y, hr, hc)
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elseif mode == 'bottom' then
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return alignRight(y, hr, hc)
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else
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return alignLeft(y)
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end
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end
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function container:draw(x, y, width, height, children, hpad, vpad, alignX)
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local w, h = children[1]:getSize()
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if self.halign == 'stretch' then
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w = width
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x = x
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else
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x = alignHandlerX(self.halign, x, width, w)
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end
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if self.valign == 'stretch' then
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h = height
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y = y
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else
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y = alignHandlerY(self.valign, y, height, h)
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end
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children[1]:draw(x, y, w, h)
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end
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return container
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