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66 lines
1.7 KiB
Lua
66 lines
1.7 KiB
Lua
--[[--
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A layout widget that puts objects besides each other.
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--]]
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local WidgetContainer = require("ui/widget/container/widgetcontainer")
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local HorizontalGroup = WidgetContainer:new{
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align = "center",
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_size = nil,
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}
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function HorizontalGroup:getSize()
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if not self._size then
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self._size = { w = 0, h = 0 }
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self._offsets = { }
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for i, widget in ipairs(self) do
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local w_size = widget:getSize()
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self._offsets[i] = {
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x = self._size.w,
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y = w_size.h
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}
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self._size.w = self._size.w + w_size.w
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if w_size.h > self._size.h then
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self._size.h = w_size.h
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end
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end
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end
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return self._size
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end
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function HorizontalGroup:paintTo(bb, x, y)
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local size = self:getSize()
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for i, widget in ipairs(self) do
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if self.align == "center" then
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widget:paintTo(bb,
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x + self._offsets[i].x,
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y + math.floor((size.h - self._offsets[i].y) / 2))
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elseif self.align == "top" then
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widget:paintTo(bb, x + self._offsets[i].x, y)
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elseif self.align == "bottom" then
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widget:paintTo(bb, x + self._offsets[i].x, y + size.h - self._offsets[i].y)
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else
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io.stderr:write("[!] invalid alignment for HorizontalGroup: ",
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self.align)
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end
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end
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end
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function HorizontalGroup:clear()
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self:free()
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WidgetContainer.clear(self)
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end
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function HorizontalGroup:resetLayout()
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self._size = nil
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self._offsets = {}
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end
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function HorizontalGroup:free()
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self:resetLayout()
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WidgetContainer.free(self)
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end
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return HorizontalGroup
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