Add global update loop, and cleanup

samples/button.rb

@@ -12,19 +12,32 @@ bg_animation = Animation.new [bg_image1, bg_image2], fps: 5
 App.language = :en
 App.localize(:en, :btn_text, "Click %{name}!")
 
-text = ElementText.new :btn_text, default_font, 0xFFFF00, {name: "Me"}, position: {x: 50, y: 50}, z: 1, click_mode: :pass, alpha: 1
+text = ElementText.new :btn_text, default_font, 0xFFFF00, {name: "Me"}, position: {x: 50, y: 50}, z: 1, click_mode: :block, alpha: 1
 
-rect = ElementRect.new 100, 25, 0xFF0000, position: {x: 50, y: 50}, z: 0, rotation: 60, scale: { x: 1, y: 1 }, alpha: 0.4
+rect = ElementRect.new 100, 25, 0xFF0000, position: {x: 50, y: 50}, z: 0, rotation: 60, scale: { x: 1, y: 1 }, alpha: 0.8, click_mode: :block
 
 image_element = ElementImage.new bg_animation, position: {x: 0, y: 0}, z: -1, click_mode: :ignore, alpha: 1
 
 pp text, rect, image_element
 
-rect.on_click do
+end_scene = Scene.new
+end_scene << rect
+
+text.click do
+  App.switch_to end_scene
+end
+
+image_element.click do
+  pp "Image clicked"
+end
+
+rect.click do
+  pp "Rect clicked", rect.color.to_s(16)
+
   rect.color = rect.color == 0xFF0000 ?
     0x00FF00 :
     0xFF0000
-  main_scene << text unless main_scene.elements.include?(text)
+
   text.params[:name] = text.params[:name] == "Me" ?
     "You" :
     "Me"
@@ -37,7 +50,7 @@ start = Time.now
 c_ = 0.0
 c_c = 0
 
-main_scene.on_update do |delta_time|
+App.update do |delta_time|
   c_ += delta_time
   c_c += 1
 
@@ -45,7 +58,7 @@ main_scene.on_update do |delta_time|
   # commented out to avoid spamming the console, but you can uncomment to see the delta time being printed every frame
   # runs at 60fps, so you should see around 16-17ms being printed
 
-  el = main_scene.elements_at(App.mouse_position)
+  el = App.scene.elements_at(App.mouse_position)
 
   pp App.text_input if App.text_input != ""
 
@@ -68,8 +81,6 @@ main_scene << text
 main_scene << rect
 main_scene << image_element
 
-main_scene.delete(text)
-
 App.start main_scene
 
 time = Time.now - start