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78 lines
2.0 KiB
Lua
78 lines
2.0 KiB
Lua
--[[--
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A layout widget that puts objects under each other.
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--]]
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local BD = require("ui/bidi")
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local WidgetContainer = require("ui/widget/container/widgetcontainer")
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local VerticalGroup = WidgetContainer:extend{
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align = "center",
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allow_mirroring = true,
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_size = nil,
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_offsets = {},
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}
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function VerticalGroup: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 = w_size.w,
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y = self._size.h,
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}
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self._size.h = self._size.h + w_size.h
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if w_size.w > self._size.w then
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self._size.w = w_size.w
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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 VerticalGroup:paintTo(bb, x, y)
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local size = self:getSize()
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local align = self.align
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if BD.mirroredUILayout() and self.allow_mirroring then
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if align == "left" then
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align = "right"
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elseif align == "right" then
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align = "left"
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end
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end
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for i, widget in ipairs(self) do
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if align == "center" then
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widget:paintTo(bb,
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x + math.floor((size.w - self._offsets[i].x) / 2),
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y + self._offsets[i].y)
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elseif align == "left" then
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widget:paintTo(bb, x, y + self._offsets[i].y)
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elseif align == "right" then
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widget:paintTo(bb,
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x + size.w - self._offsets[i].x,
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y + self._offsets[i].y)
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end
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end
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end
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function VerticalGroup:clear()
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self:free()
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-- Skip WidgetContainer:clear's free call, we just did that in our own free ;)
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WidgetContainer.clear(self, true)
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end
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function VerticalGroup:resetLayout()
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self._size = nil
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self._offsets = {}
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end
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function VerticalGroup:free()
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--print("VerticalGroup:free on", self)
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self:resetLayout()
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WidgetContainer.free(self)
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end
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return VerticalGroup
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