48 lines
1.6 KiB
Lua
48 lines
1.6 KiB
Lua
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-- view1D.lua : A basic 1D view for menus.
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-- Must be used as a subobject of a Menu
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--[[
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Copyright © 2019 Kazhnuz
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the "Software"), to deal in
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the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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the Software, and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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]]
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local View1D = Object:extend()
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function View1D:new(slotNumber)
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self.slotNumber = slotNumber
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self.firstSlot = 1
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end
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function View1D:reset()
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self.firstSlot = 1
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end
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function View1D:updateFirstSlot(widgetID)
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self.firstSlot = math.max(1, widgetID - (self.slotNumber - 1), math.min(widgetID, self.firstSlot))
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end
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function View1D:isBeforeView(x)
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return (x < self.firstSlot)
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end
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function View1D:isAfterView(x)
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return (x >= (self.firstSlot + self.slotNumber))
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end
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return View1D
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