Refactored Container to be an Element, removed button_up/button_down passing to elements, moved Gui out of GameState and into GuiState, added scaffolding for events (Publish/Subscribe pattern). Element input is broken ATM.

lib/cyberarm_engine/ui/gui_state.rb

@@ -0,0 +1,87 @@
+module CyberarmEngine
+  class GuiState < GameState
+    include Common
+    include DSL
+
+    def initialize(options = {})
+      @options = options
+      @game_objects = []
+      @global_pause = false
+
+      @root_container = Stack.new
+      @game_objects << @root_container
+      @containers     = [@root_container]
+
+      @focus = nil
+      @mouse_over = nil
+      @mouse_down_on = {}
+      @mouse_down_position = {}
+
+
+      setup
+    end
+
+    def focus=(element)
+      @focus.publish(:blur) if @focus and element
+      @focus = element
+    end
+
+    def update
+      super
+
+      new_mouse_over = @root_container.hit_element?(window.mouse_x, window.mouse_y)
+      @mouse_over.publish(:leave) if @mouse_over && new_mouse_over != @mouse_over
+      @mouse_over = new_mouse_over
+
+      redirect_holding_mouse_button(:left) if @mouse_over && Gosu.button_down?(Gosu::MsLeft)
+      redirect_holding_mouse_button(:middle) if @mouse_over && Gosu.button_down?(Gosu::MsMiddle)
+      redirect_holding_mouse_button(:right) if @mouse_over && Gosu.button_down?(Gosu::MsRight)
+    end
+
+    def button_down(id)
+      super
+
+      case id
+      when Gosu::MsLeft
+        redirect_mouse_button(:left)
+      when Gosu::MsMiddle
+        redirect_mouse_button(:middle)
+      when Gosu::MsRight
+        redirect_mouse_button(:right)
+      end
+    end
+
+    def button_up(id)
+      super
+
+      case id
+      when Gosu::MsLeft
+        redirect_released_mouse_button(:left)
+      when Gosu::MsMiddle
+        redirect_released_mouse_button(:middle)
+      when Gosu::MsRight
+        redirect_released_mouse_button(:right)
+      when Gosu::MsWheelUp
+        redirect_mouse_wheel(:up)
+      when Gosu::MsWheelDown
+        redirect_mouse_wheel(:down)
+      end
+    end
+
+    def redirect_mouse_button(button)
+      @mouse_over.publish(:"released_#{button}_mouse_button", window.mouse_x, window.mouse_y) if @mouse_over
+    end
+
+    def redirect_released_mouse_button(button)
+      @mouse_over.publish(:"released_#{button}_mouse_button", window.mouse_x, window.mouse_y) if @mouse_over
+    end
+
+    def redirect_holding_mouse_button(button)
+      @mouse_over.publish(:"holding_#{button}_mouse_button", window.mouse_x, window.mouse_y) if @mouse_over
+    end
+
+    def redirect_mouse_wheel(button)
+      @mouse_over.publish(:"scroll_#{button}", window.mouse_x, window.mouse_y) if @mouse_over
+    end
+  end
+end