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38 lines
670 B
38 lines
670 B
1 year ago
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local lvgl = require("lvgl")
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local backstack = {
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root = lvgl.Object(nil, {
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w = lvgl.HOR_RES(),
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h = lvgl.VER_RES(),
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}),
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stack = {},
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}
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function backstack:Top()
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return self.stack[#self.stack]
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end
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function backstack:SetTopParent(parent)
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local top = self:Top()
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if top and top.root then
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top.root:set_parent(parent)
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end
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end
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function backstack:Push(screen)
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self:SetTopParent(nil)
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table.insert(self.stack, screen)
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self:SetTopParent(self.root)
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end
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function backstack:Pop(num)
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num = num or 1
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for _ = 1, num do
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local removed = table.remove(self.stack)
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removed.root:delete()
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end
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self:SetTopParent(self.root)
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end
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return backstack
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