Love - GUI

Get GOOi

Visit the following github repository:

GOOi

Click clone or download, and download a 'zip' file. When you extract the zip file, drag the folder onto your LOVE shortcut to see the demon page:

Rename main.lua

Go into the folder and rename the 'main.lua' to something like 'mainold.lua'. It will be important to keep the old version for reference. Now create a new file called 'main.lua' for this tutorial and enter this:

function love.load()
  gr = love.graphics
  kb = love.keyboard
  mo = love.mouse

  gr.setBackgroundColor(0.5, 0.5, 0.5) -- change this for background of whole window

  function width() return gr.getWidth() end
  function height() return gr.getHeight() end

  imgDir = "/imgs/"
  fontDir = "/fonts/"

  -- change these to change how each panel/menu looks
  style = {
    font = gr.newFont(fontDir.."Arimo-Bold.ttf", 13),
    showBorder = true,
    bgColor = {0.208, 0.220, 0.222}
  }
  gooi.setStyle(style)
  gooi.desktopMode()

  --gooi.shadow() -- More options
  --gooi.mode3d() -- More options
  --gooi.glass() -- More options
	
  --gr.setDefaultFilter("nearest", "nearest")
end

function love.update(dt)
	gooi.update(dt)
end

function love.draw()
	gooi.draw()
end

function love.mousereleased(x, y, button) gooi.released() end
function love.mousepressed(x, y, button)  gooi.pressed() end

function love.textinput(text)
	gooi.textinput(text)
end

function love.keypressed(key, scancode, isrepeat)
  gooi.keypressed(key, scancode, isrepeat)
  if key == "escape" then
    quit()
  end
end

function love.keyreleased(key, scancode)
  gooi.keyreleased(key, scancode)
end

function quit()
  love.event.quit()
end

Screen Base Class

Create a new class to be the base of every screen, remember this should be at the top of your code and not in any other functions (such as 'love.load'):

require "gooi"

function Screen(x,y,w,h)

	local self  = {
		xc =x,
		yc=y,
		wi=w,
		he=h
		}
		
	function self.clear()
		gooi.removeComponent(self.panel)
		self.panel=gooi.newPanel({xc, yc, wi, he, layout = "game"})
	end
	
	self.panel = gooi.newPanel({xc, yc, wi, he, layout = "game"})
		
	return self
end

This will be inherited by the other screens, and give them a common base. The 'gooi.newPanel' will be a component to which you can add other components. The 'clear' function is to easily remove a panel.

MainScreen Class

This inherits the base class and is for a specific screen, each required screen will need to be declared as a class of 'Screen':

function MainScreen (x,y,w,h)
	local self = Screen(x,y,w,h)
	
	function self.init()
		-- add your gooi components here
		self.panel:add(gooi.newButton({text = "<= shot"}), "b-r")
		self.panel:add(gooi.newText({y = 100, w = 100, h = 22}):setText("A text field"),"t-l")
	end
	
	return self
end

The init method is to define the components and will also cause the panel to be displayed.

Array of Screens

Next we can create an array for the different screens within the project, try to add this code at the top of your code:

Screens = {}

You can then add each screen to the 'Screens' structure, add this to the 'love.load':

Screens[0] = MainScreen(5,5,200,200)

You can then use the init & clear methods to set the screen to display.

Screens[0].clear()
Screens[0].init()