Added levels menu

menu/levels.lua

@@ -0,0 +1,47 @@
+require 'menu.state'
+require 'button'
+require 'text'
+
+local common = require 'menu.common'
+
+local size, margin = 60, 30
+local levelSize = Point:new( size, size )
+local yOffset = 160
+
+local levelsPerLine = 8
+local levelCount = #LevelHandler.levels
+
+local buttons = {}
+
+for i=1,levelCount do
+    local x = (size + margin) * (i % levelsPerLine)
+    local y = (size + margin) * math.floor(i / levelsPerLine) + yOffset
+    local button = Button:new(
+        Point:new(x, y),
+        levelSize,
+        tostring(i),
+        nil,
+        nil,
+        function()
+            GameGrid = LevelHandler:indexed(i)
+            Menu.updateCellSize()
+            Menu.current_state = MenuStateIndex.hidden
+        end
+    )
+    table.insert(buttons, button)
+end
+
+local exitToMenuButton = Button:new(
+        Point:new( 240, 40 ),
+        common.buttonSize,
+        'Return to menu',
+        nil,
+        nil,
+        function()
+            Menu.current_state = MenuStateIndex.start
+        end
+    )
+
+table.insert(buttons, exitToMenuButton)
+
+return MenuState:new(buttons)