scenes/mainmenu: dim the main menu when inactive

imperium-porcorum.love/scenes/debugmenu/mainmenu.lua

@@ -7,6 +7,8 @@ local MapWidget     = MainWidget:extend()
 local ExitWidget    = MainWidget:extend()
 local OptionsWidget = MainWidget:extend()
 
+local DIMVALUE      = .5
+
 function MenuObject:new(scene)
   self.scene = scene
   local screenwidth, screenheight = core.screen:getDimensions()
@@ -59,6 +61,20 @@ function MainWidget:drawCanvas()
   end
 end
 
+function MainWidget:draw(x, y)
+  if self.menu.isActive == false then
+    love.graphics.setColor(DIMVALUE, DIMVALUE, DIMVALUE, 1)
+  else
+    utils.graphics.resetColor()
+  end
+
+  if self.canvas.texture ~= nil then
+    love.graphics.draw(self.canvas.texture, x, y)
+  end
+
+  utils.graphics.resetColor()
+end
+
 function MapWidget:new(menusystem)
   MapWidget.super.new(self, menusystem, "WORLD MAP")
 end