Move methods to base class

lib/widgets/container.rb

@@ -2,5 +2,20 @@
 
 module Widgets
   class Container < Base
+    attr_reader :focus
+
+    def draw
+      children.each(&:render)
+    end
+
+    def children
+      raise NotImplementedError, "#{self.class}#children"
+    end
+
+    def focus=(value)
+      focus&.focused = false
+      @focus = value
+      focus.focused = true
+    end
   end
 end

lib/widgets/menu.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 module Widgets
-  class Menu < Base
+  class Menu < Container
     def initialize(x, y, _width, height)
       super x, y, Logo::WIDTH, height
 
@@ -9,9 +9,8 @@ module Widgets
       @items = Items.new x, @logo.height, @logo.width, nil
     end
 
-    def draw
-      @logo.render
-      @items.render
+    def children
+      [@logo, @items]
     end
   end
 end

lib/widgets/menu/items.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 module Widgets
-  class Menu < Base
+  class Menu < Container
     class Items < Base
       ITEMS = [
         'Foo menu item',

lib/widgets/menu/logo.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 module Widgets
-  class Menu < Base
+  class Menu < Container
     class Logo < Base
       LOGO = [
         '  _____ ___ _  _ ___  _   _  ',

lib/widgets/messenger.rb

@@ -2,8 +2,6 @@
 
 module Widgets
   class Messenger < Container
-    attr_reader :focus
-
     def initialize(x, y, width, height)
       super
 
@@ -16,12 +14,11 @@ module Widgets
       @peers = Widgets::Peers.new x + peers_left, y, peers_width, height
       @chat  = Widgets::Chat.new  x + chat_left,  y, chat_width,  height
 
-      @focus = @peers
+      self.focus = @peers
     end
 
-    def draw
-      @peers.render
-      @chat.render
+    def children
+      [@peers, @chat]
     end
 
     def trigger(event)
@@ -31,7 +28,7 @@ module Widgets
       when Events::Window::Right
         right
       else
-        @focus.trigger event
+        focus.trigger event
       end
     end
 
@@ -47,11 +44,5 @@ module Widgets
       @focused = !!value
       focus.focused = focused
     end
-
-    def focus=(child)
-      focus.focused = false
-      @focus = child
-      focus.focused = true if focused
-    end
   end
 end

lib/widgets/v_panel.rb

@@ -2,12 +2,5 @@
 
 module Widgets
   class VPanel < Container
-    def draw
-      children.each(&:render)
-    end
-
-    def children
-      raise NotImplementedError, "#{self.class}#children"
-    end
   end
 end

lib/widgets/window.rb

@@ -13,19 +13,12 @@ module Widgets
       self.focus = @messenger
     end
 
+    def children
+      [@menu, @messenger]
+    end
+
     def trigger(event)
       focus.trigger event
     end
-
-    def draw
-      @menu.render
-      @messenger.render
-    end
-
-    def focus=(value)
-      focus.focused = false if focus
-      @focus = value
-      focus.focused = true
-    end
   end
 end