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|
-- `Selector` (Element)
-- Used in Menu for selecting various things from list. Works for each Controller set or globally.
--[[
How to use `Selector` in `Menu` config file?
selector:new(menu)
:setPosition(x, y)
:setSpacing(42, 0)
:set("list", require "nautslist")
:set("sprite", love.graphics.newImage("assets/portraits.png"))
:set("quads", require "portraits")
:set("global", false) -- true: single selector; false: selector for each controller set present
:init()
]]
Selector = {
parent,
x = 0,
y = 0,
horizontal = 0,
height = 0,
focused = false,
global = false,
list,
sets,
locks,
selections,
sprite,
quads
}
-- Constructor
function Selector:new(parent)
local o = {}
setmetatable(o, self)
self.__index = self
o.parent = parent
return o
end
-- Position
function Selector:getPosition()
return self.x, self.y
end
function Selector:setPosition(x,y)
self.x, self.y = x, y
return self
end
-- Spacing between positions of two blocks
function Selector:getSpacing()
return self.horizontal, self.vertical
end
function Selector:setSpacing(horizontal, vertical)
self.horizontal, self.vertical = horizontal, vertical
return self
end
-- General setter for Menu configuration files
function Selector:set(name, func)
if type(name) == "string" and func ~= nil then
self[name] = func
end
return self
end
-- Initialize Selector with current settings.
function Selector:init()
-- Make sure that there is list present
if self.list == nil then
self.list = {}
end
-- Initialize global Selector
if self.global then
self.locks = {false}
self.selections = {1}
-- Initialize Selector for Controllers
else
self.sets = Controller.getSets()
self.locks = {}
self.selections = {}
for n=1,#self.sets do
self.locks[n] = false
self.selections[n] = 1
end
end
return self
end
-- Cycle through list on given number
function Selector:next(n)
local total = #self.list
local current = self.selections[n]
local locked = self:isLocked(n)
if not locked then
self.selections[n] = (current % total) + 1
end
end
function Selector:previous(n)
local total = #self.list
local current = self.selections[n]
local locked = self:isLocked(n)
if not locked then
if current == 1 then
self.selections[n] = total
else
self.selections[n] = current - 1
end
end
end
-- Get number associated with a given set
function Selector:checkNumber(set)
if self.global then return 1 end -- For global Selector
for n,check in pairs(self.sets) do
if check == set then return n end
end
end
-- Check if given number is locked
function Selector:isLocked(n)
return self.locks[n]
end
-- Get value of selection of given number
function Selector:getSelection(n)
return self.selections[n]
end
-- Get value from list by selection
function Selector:getListValue(i)
return self.list[i]
end
-- Draw single block of Selector
function Selector:drawBlock(n, x, y, scale)
local x, y = x or 0, y or 0
if self.quads == nil or self.sprite == nil then return end
love.graphics.setFont(Font)
love.graphics.setColor(255, 255, 255, 255)
local name = self:getListValue(self:getSelection(n))
local locked = self:isLocked(n)
local sprite = self.sprite
local quad = self.quads[name]
local arrowl = self.quads.arrow_left
local arrowr = self.quads.arrow_right
if not locked then
love.graphics.draw(sprite, quad.normal, x*scale, y*scale, 0, scale, scale)
if self.focused then
love.graphics.draw(sprite, arrowl, (x-2)* scale, (y+13)*scale, 0, scale, scale)
love.graphics.draw(sprite, arrowr, (x+30)*scale, (y+13)*scale, 0, scale, scale)
end
else
love.graphics.draw(sprite, quad.active, x*scale, y*scale, 0, scale, scale)
end
if self:getSelection(n) ~= 1 then
love.graphics.printf(string.upper(name), (x-8)*scale, (y+33)*scale, 48, "center", 0, scale, scale)
end
end
-- Menu callbacks
function Selector:focus() -- Called when Element gains focus
self.focused = true
return true
end
function Selector:blur() -- Called when Element loses focus
self.focused = false
end
-- LÖVE2D callbacks
function Selector:draw(scale)
local x,y = self:getPosition()
local h,v = self:getSpacing()
x = #self.sets*h*0.5
for n=1,#self.selections do
self:drawBlock(n, x+h*n, y+v*n, scale)
end
end
function Selector:update(dt) end
-- Controller callbacks
function Selector:controlpressed(set, action, key)
if set and self.focused then
local n = self:checkNumber(set)
local locked = self:isLocked(n)
if action == "left" and not locked then self:previous(n) end
if action == "right" and not locked then self:next(n) end
end
end
function Selector:controlreleased(set, action, key) end
return Selector
|
