AlignGrid.lua

--[[
AlignGrid.lua
Author: Skyraker
Assistance by: Garkin and Merlight
]]--

----------------------- Addon Locals --------------------------
local WM = WINDOW_MANAGER
local LAM2 = LibStub:GetLibrary("LibAddonMenu-2.0")
local AlignGridWindow
local AlignGrid_SavedVars = AlignGrid_SavedVars or {}
---------------------------------------------------------------

------------------------- Addon Default Settings ---------------
local AlignGridDefault = {
	reset = false,
	GRID_SIZE = 32,
	LINE_THICKNESS = 2,
	GRID_ALPHA = 0.45,
	LINE_COLOR = {r = 0, g = 0, b = 0, a = 0.45},
	CENT_COLOR = {r = 255, g = 0, b = 0, a = 0.45}
}
----------------------------------------------------------------

--------------------- Line Creation and Pool Storage --------------------------
local function createLine(pool)
	local line = WM:CreateControl(nil,AlignGridWindow,CT_TEXTURE)
	line:SetColor(0,0,0,AlignGrid_SavedVars.settings.GRID_ALPHA)
	line:SetPixelRoundingEnabled(false)
	return line
end

local function resetLines(object)
	object:SetHidden(true)
end

AlignGridLinePool = ZO_ObjectPool:New(createLine,resetLines)

local function resetGrid()
	AlignGridLinePool:ReleaseAllObjects()
end

local function showGrid()
	AlignGridWindow:SetHidden(false)
end

local function hideGrid()
	AlignGridWindow:SetHidden(true)
end

local function createGrid()
	local SCREEN_WIDTH, SCREEN_HEIGHT = GuiRoot:GetDimensions()
	local gridStep = AlignGrid_SavedVars.settings.GRID_SIZE / GetUIGlobalScale()
	local centAlpha = AlignGrid_SavedVars.settings.GRID_ALPHA
	local centColor = AlignGrid_SavedVars.settings.CENT_COLOR
	local lineColor = AlignGrid_SavedVars.settings.LINE_COLOR
	local lineWidth = AlignGrid_SavedVars.settings.LINE_THICKNESS / GetUIGlobalScale()
	local function addLine(width, height, offsetX, offsetY, level, color, alpha)
		local line = AlignGridLinePool:AcquireObject()
		line:SetDimensions(width, height)
		line:SetAnchor(CENTER, AlignGridWindow, CENTER, offsetX, offsetY)
		line:SetDrawLevel(level)
		line:SetColor(color.r, color.g, color.b, alpha or color.a)
		line:SetHidden(false)
	end
	local function getAlpha(index)
		if index % 10 == 0 then
			return centAlpha
		elseif index % 5 == 0 then
			return centAlpha * 0.7
		else
			return centAlpha * 0.4
		end
	end
	resetGrid()
	-- center cross
	addLine(lineWidth, SCREEN_HEIGHT, 0, 0, 20, centColor, centAlpha)
	addLine(SCREEN_WIDTH, lineWidth, 0, 0, 20, centColor, centAlpha)
	-- vertical lines
	for i = 1, zo_floor(SCREEN_WIDTH / gridStep / 2) do
		local a = getAlpha(i)
		addLine(lineWidth, SCREEN_HEIGHT, i * gridStep, 0, 10, lineColor, a)
		addLine(lineWidth, SCREEN_HEIGHT, -i * gridStep, 0, 10, lineColor, a)
	end
	-- horizontal lines
	for i = 1, zo_floor(SCREEN_HEIGHT / gridStep / 2) do
		local a = getAlpha(i)
		addLine(SCREEN_WIDTH, lineWidth, 0, i * gridStep, 10, lineColor, a)
		addLine(SCREEN_WIDTH, lineWidth, 0, -i * gridStep, 10, lineColor, a)
	end
end
-------------------------------------------------------------------------------------------------------------

----------------------------- Setting Menu -----------------------------------------------------------------
local panelData = {
	type = "panel",
	name = "AlignGrid",
	author = "Skyraker",
	version = "0.2",
	slashCommand = "/align"
}

local optionsData = {
	[1] = {
		type = "button",
		name = "Reset Grid",
		tooltip = "Resets grid with currently selected sizes",
		func = function() 
						AlignGrid_SavedVars.settings.reset = true
						createGrid()
					end
	},
	[2] = {
		type = "slider",
		name = "Grid Size",
		tooltip = "Adjust grid box size",
		min = 16,
		max = 54,
		step = 4,
		getFunc = function() return AlignGrid_SavedVars.settings.GRID_SIZE end,
		setFunc = function(value)
								AlignGrid_SavedVars.settings.GRID_SIZE = value
							end,
		warning = "PRESS Reset Grid button to show changes"
	},
	[3] = {
		type = "slider",
		name = "Thickness",
		tooltip = "Adjust thickness of gridlines",
		min = 1,
		max = 6,
		step = 1,
		getFunc = function() return AlignGrid_SavedVars.settings.LINE_THICKNESS end,
		setFunc = function(value)
								AlignGrid_SavedVars.settings.LINE_THICKNESS = value
							end,
		warning = "PRESS Reset Grid button to show changes"
	},
	[4] = {
		type = "slider",
		name = "Transparency",
		tooltip = "Adjust transparency of grid.",
		min = 0,
		max = 10,
		step = .5,
		getFunc = function() return AlignGrid_SavedVars.settings.GRID_ALPHA * 10.0 end,
		setFunc = function(value)
								AlignGrid_SavedVars.settings.GRID_ALPHA = value / 10.0
								for i = 1,  AlignGridLinePool:GetActiveObjectCount() do
									AlignGridLinePool.m_Active[i]:SetAlpha(value / 10.0)
								end
							end
	},
	[5] = {
		type = "colorpicker",
		name = "Center Line Color",
		tooltip = "Color the horizontal and vertical center lines.",
		getFunc = function() return AlignGrid_SavedVars.settings.CENT_COLOR.r, AlignGrid_SavedVars.settings.CENT_COLOR.g, AlignGrid_SavedVars.settings.CENT_COLOR.b end,
		setFunc = function(r,g,b,a)
						AlignGrid_SavedVars.settings.CENT_COLOR.r = r
						AlignGrid_SavedVars.settings.CENT_COLOR.g = g
						AlignGrid_SavedVars.settings.CENT_COLOR.b = b
					end,
		warning = "PRESS Reset Grid button to show changes"
	}
}

LAM2:RegisterAddonPanel("AlignGridOptions", panelData)
LAM2:RegisterOptionControls("AlignGridOptions", optionsData)
----------------------------------------------------------------------------------------------------------

---------------------------------- Addon Initialization --------------------------------------------------
local function setupSavedVars()
	AlignGrid_SavedVars = {
		["settings"] = ZO_SavedVars:New("AlignGrid_SavedVars",1,"settings",AlignGridDefault,nil)
	}
	return AlignGrid_SavedVars
end

local function AddOnLoaded(eventID,addonName)
	if addonName == "AlignGrid" then
		EVENT_MANAGER:UnregisterForEvent("AlignGrid_Start",eventID)
		setupSavedVars()
		AlignGridWindow = WM:CreateTopLevelWindow("AlignGrid")
		AlignGridWindow:SetAnchorFill(GuiRoot)
		AlignGridWindow:SetDrawLayer(DL_BACKGROUND)
		AlignGridWindow:SetMouseEnabled(false)
		SLASH_COMMANDS["/grid"] = function()
			if AlignGridWindow:IsHidden() then
				AlignGridWindow:SetHidden(false)
			else
				AlignGridWindow:SetHidden(true)
			end
		end
		createGrid()
		hideGrid()
	end
end

EVENT_MANAGER:RegisterForEvent("AlignGrid_Start",EVENT_ADD_ON_LOADED,AddOnLoaded)
---------------------------------------------------------------------------------------------------