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--- `Selector`
-- Element for selecting variable from list.
Selector = require "not.Element":extends()
Selector.DEFAULT_DELAY = 2
Selector.SHAPE_PORTRAIT = 1
Selector.SHAPE_PANORAMA = 2
function Selector:new (group, parent)
Selector.__super.new(self, parent)
self.atlas, self.quads = parent:getSheet()
self.group = group
self.delay = Selector.DEFAULT_DELAY
self.shape = Selector.SHAPE_PORTRAIT
self.focused = false
self.locked = false
self.index = 1
end
-- TODO: See `not/Element@getSize`.
function Selector:getSize ()
if self.shape == Selector.SHAPE_PORTRAIT then
return 32, 32
end
if self.shape == Selector.SHAPE_PANORAMA then
return 80, 42
end
end
--- Makes sure that n is in <1, total> range.
local
function limit (n, total)
if n > total then
return limit(n - total, total)
end
if n < 1 then
return limit(n + total, total)
end
return n
end
--- Chooses item with an index.
-- @param index selected item's index
-- @return old index
function Selector:setIndex (index)
local old = self.index
self.index = limit(index, #self.list)
return old
end
--- Returns selected item's value.
-- @return item selected from the list
function Selector:getSelected ()
return self.list[self.index]
end
--- Checks if selection is locked and returns item's value.
-- @return item selected from the list if locked, nil otherwise
function Selector:getLocked ()
if self.locked then
return self:getSelected()
end
end
--- Checks if Selected value is unique in group's scope.
-- @return boolean answering question
function Selector:isUnique ()
if self.group then
-- In this case next is used to determine if table returned by call is empty.
if next(group:callEachBut(self, "getLocked")) then
return false
end
end
return true
end
function Selector:focus ()
self.focused = true
return true
end
function Selector:blur ()
self.focused = false
end
return Selector
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