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1 files changed, 51 insertions, 0 deletions

diff --git a/dragon/keys.rb b/dragon/keys.rb
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+# coding: utf-8
+# Copyright 2019 DragonRuby LLC
+# MIT License
+# controller/keys.rb has been released under MIT (*only this file*).
+
+module GTK
+  class Controller
+    class Keys
+      include Serialize
+
+      LABELS = [
+        :up, :down, :left, :right,
+        :a, :b, :x, :y,
+        :l1, :r1,
+        :l2, :r2,
+        :l3, :r3,
+        :start, :select,
+        :directional_up, :directional_down, :directional_left, :directional_right
+      ].freeze
+
+      LABELS.each do |label|
+        attr_reader label
+      end
+
+      # Activate a key.
+      #
+      # @return [void]
+      def activate key
+        instance_variable_set("@#{key}", Kernel.tick_count + 1)
+      end
+
+      # Deactivate a key.
+      #
+      # @return [void]
+      def deactivate key
+        instance_variable_set("@#{key}", nil)
+      end
+
+      # Clear all key inputs.
+      #
+      # @return [void]
+      def clear
+        LABELS.each { |label| deactivate(label) }
+      end
+
+      def truthy_keys
+        LABELS.select { |label| send(label) }
+      end
+    end
+  end
+end