Added entropy view

include/views/view_entropy.hpp

@@ -0,0 +1,28 @@
+#pragma once
+
+#include "views/view.hpp"
+
+#include <cstdio>
+
+namespace hex {
+
+    namespace prv { class Provider; }
+
+    class ViewEntropy : public View {
+    public:
+        explicit ViewEntropy(prv::Provider* &dataProvider);
+        ~ViewEntropy() override;
+
+        void createView() override;
+        void createMenu() override;
+
+    private:
+        prv::Provider* &m_dataProvider;
+        bool m_windowOpen = true;
+
+        double m_entropy = 0;
+        float m_valueCounts[256] = { 0 };
+        bool m_shouldInvalidate = true;
+    };
+
+}