-- Credit : Ideo

Keys = {
	["ESC"] = 322, ["F1"] = 288, ["F2"] = 289, ["F3"] = 170, ["F5"] = 166, ["F6"] = 167, ["F7"] = 168, ["F8"] = 169, ["F9"] = 56, ["F10"] = 57, 
	["~"] = 243, ["1"] = 157, ["2"] = 158, ["3"] = 160, ["4"] = 164, ["5"] = 165, ["6"] = 159, ["7"] = 161, ["8"] = 162, ["9"] = 163, ["-"] = 84, ["="] = 83, ["BACKSPACE"] = 177, 
	["TAB"] = 37, ["Q"] = 44, ["W"] = 32, ["E"] = 38, ["R"] = 45, ["T"] = 245, ["Y"] = 246, ["U"] = 303, ["P"] = 199, ["["] = 39, ["]"] = 40, ["ENTER"] = 18,
	["CAPS"] = 137, ["A"] = 34, ["S"] = 8, ["D"] = 9, ["F"] = 23, ["G"] = 47, ["H"] = 74, ["K"] = 311, ["L"] = 182,
	["LEFTSHIFT"] = 21, ["Z"] = 20, ["X"] = 73, ["C"] = 26, ["V"] = 0, ["B"] = 29, ["N"] = 249, ["M"] = 244, [","] = 82, ["."] = 81,
	["LEFTCTRL"] = 36, ["LEFTALT"] = 19, ["SPACE"] = 22, ["RIGHTCTRL"] = 70, 
	["HOME"] = 213, ["PAGEUP"] = 10, ["PAGEDOWN"] = 11, ["DELETE"] = 178,
	["LEFT"] = 174, ["RIGHT"] = 175, ["TOP"] = 27, ["DOWN"] = 173,
	["NENTER"] = 201, ["N4"] = 108, ["N5"] = 60, ["N6"] = 107, ["N+"] = 96, ["N-"] = 97, ["N7"] = 117, ["N8"] = 61, ["N9"] = 118
}



Menu = {}
Menu.GUI = {}
Menu.buttonCount = 0
Menu.selection = 0
Menu.hidden = true
MenuTitle = "Menu"

function Menu.addButton(name, func,args)

	local yoffset = 0.3
	local xoffset = 0
	local xmin = 0.0
	local xmax = 0.2
	local ymin = 0.05
	local ymax = 0.05
	Menu.GUI[Menu.buttonCount +1] = {}
	Menu.GUI[Menu.buttonCount +1]["name"] = name
	Menu.GUI[Menu.buttonCount+1]["func"] = func
	Menu.GUI[Menu.buttonCount+1]["args"] = args
	Menu.GUI[Menu.buttonCount+1]["active"] = false
	Menu.GUI[Menu.buttonCount+1]["xmin"] = xmin + xoffset
	Menu.GUI[Menu.buttonCount+1]["ymin"] = ymin * (Menu.buttonCount + 0.01) +yoffset
	Menu.GUI[Menu.buttonCount+1]["xmax"] = xmax 
	Menu.GUI[Menu.buttonCount+1]["ymax"] = ymax 
	Menu.buttonCount = Menu.buttonCount+1
end


function Menu.updateSelection() 
	if IsControlJustPressed(1, Keys["DOWN"])  then 
		if(Menu.selection < Menu.buttonCount -1  )then
			Menu.selection = Menu.selection +1
		else
			Menu.selection = 0
		end
	elseif IsControlJustPressed(1, Keys["TOP"]) then
		if(Menu.selection > 0)then
			Menu.selection = Menu.selection -1
		else
			Menu.selection = Menu.buttonCount-1
		end
	elseif IsControlJustPressed(1, Keys["NENTER"])  then
			MenuCallFunction(Menu.GUI[Menu.selection +1]["func"], Menu.GUI[Menu.selection +1]["args"])
	end
	local iterator = 0
	for id, settings in ipairs(Menu.GUI) do
		Menu.GUI[id]["active"] = false
		if(iterator == Menu.selection ) then
			Menu.GUI[iterator +1]["active"] = true
		end
		iterator = iterator +1
	end
end

function Menu.renderGUI()
	if not Menu.hidden then
		Menu.renderButtons()
		Menu.updateSelection()
	end
end

function Menu.renderBox(xMin,xMax,yMin,yMax,color1,color2,color3,color4)
	DrawRect(xMin, yMin,xMax, yMax, color1, color2, color3, color4);
end

function Menu.renderButtons()
	
local yoffset = 0.3
local xoffset = 0

		SetTextFont(0)
		SetTextScale(0.0,0.35)
		SetTextColour(255, 255, 255, 255)
		SetTextCentre(true)
		SetTextDropShadow(0, 0, 0, 0, 0)
		SetTextEdge(0, 0, 0, 0, 0)
		SetTextEntry("STRING") 
		AddTextComponentString(string.upper(MenuTitle))
		DrawText((xoffset + 0.05), (yoffset - 0.05 - 0.0125 ))
		Menu.renderBox(xoffset,0.2,(yoffset - 0.05),0.05,20,30,10,255)
		
		
	for id, settings in pairs(Menu.GUI) do
		local screen_w = 0
		local screen_h = 0
		screen_w, screen_h =  GetScreenResolution(0, 0)
		boxColor = {42,63,17,255}
		
		if(settings["active"]) then
			boxColor = {107,158,44,255}
		end
		SetTextFont(0)
		SetTextScale(0.0,0.35)
		SetTextColour(255, 255, 255, 255)
		SetTextCentre(true)
		SetTextDropShadow(0, 0, 0, 0, 0)
		SetTextEdge(0, 0, 0, 0, 0)
		SetTextEntry("STRING") 
		AddTextComponentString(settings["name"])
		DrawText(settings["xmin"]+ 0.05, (settings["ymin"] - 0.0125 )) 
		Menu.renderBox(settings["xmin"] ,settings["xmax"], settings["ymin"], settings["ymax"],boxColor[1],boxColor[2],boxColor[3],boxColor[4])
	 end     
end


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function ClearMenu()
	--Menu = {}
	Menu.GUI = {}
	Menu.buttonCount = 0
	Menu.selection = 0
end

function MenuCallFunction(fnc, arg)
	_G[fnc](arg)
end

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