gamecore: add scene storage system

examples/test_scene/init.lua

@@ -35,6 +35,7 @@ function TestScene:update(dt)
 end
 
 function TestScene:mousepressed(x, y)
+  core.scenemanager:storeCurrentScene("pausedScene")
   examples.Test2()
 end
 

examples/test_scene2/init.lua

@@ -35,7 +35,7 @@ function TestScene:update(dt)
 end
 
 function TestScene:mousepressed(x, y)
-  examples.Test()
+  core.scenemanager:setStoredScene("pausedScene")
 end
 
 

gamecore/scenemanager.lua

@@ -28,12 +28,30 @@ local SceneManager  = Object:extend()
 function SceneManager:new(controller)
   self.controller   = controller
   self.currentScene = nil
+
+  self.storage      = {}
 end
 
 function SceneManager:setScene(scene)
   self.currentScene = scene
 end
 
+function SceneManager:storeCurrentScene(name)
+  self.storage[name] = self.currentScene
+end
+
+function SceneManager:setStoredScene(name)
+  local storedScene = self.storage[name]
+  if storedScene ~= nil then
+    self.currentScene   = storedScene
+    self.storage[name]  = nil
+  end
+end
+
+function SceneManager:clearStorage()
+  self.storage = {}
+end
+
 function SceneManager:update(dt)
   if (self.currentScene ~= nil) then
     local keys = self.controller.input.keys