Improvements

lib/gui_state_ext.rb

@@ -0,0 +1,52 @@
+module CyberarmEngine
+  class GuiState < CyberarmEngine::GameState
+    def menu(host_element, items:, width: 200)
+      container = CyberarmEngine::Element::Stack.new(
+        parent: host_element.parent,
+        width: width,
+        theme: W3DHub::THEME,
+        border_color: 0xff_000000,
+        border_thickness: 1
+      )
+
+      container.instance_variable_set(:"@__menu", host_element)
+
+      container.define_singleton_method(:recalculate_menu) do
+        @x = @__menu.x
+        @y = @__menu.y + @__menu.height
+
+        @y = @__menu.y - height if @y + height > window.height
+      end
+
+      def container.recalculate
+        super
+
+        recalculate_menu
+      end
+
+      items.each do |item|
+        btn = CyberarmEngine::Element::Button.new(
+          item[:label],
+          {
+            parent: container,
+            width: 1.0,
+            text_align: :left,
+            theme: W3DHub::THEME,
+            border_thickness: 0,
+            margin: 0
+          },
+          proc do
+            item[:block]&.call
+          end
+        )
+        container.add(btn)
+      end
+
+      container.recalculate
+      container.recalculate
+      container.recalculate
+
+      show_menu(container)
+    end
+  end
+end