first commit

core/Engine.h

@@ -0,0 +1,50 @@
+#pragma once
+
+#include <set>
+
+#include "PaintDevice.h"
+
+class Engine
+{
+public:
+    enum class ErrorCode
+    {
+        success = 0,
+        paint_device_not_ready
+    };
+
+    virtual ~Engine() = default;
+
+    ErrorCode run();
+
+protected:
+    void track_key(int key);
+
+    void untrack_key(int key);
+
+    PaintDevice& paint_device()
+    {
+        return m_PaintDevice;
+    }
+
+    virtual bool end() const = 0;
+
+    virtual void on_button_press(
+            int button
+    ) = 0;
+
+    virtual void update(
+            int dt
+    ) = 0;
+
+    virtual void render(
+            PaintDevice& paintDevice
+    ) = 0;
+
+private:
+    void updateInput();
+
+    PaintDevice m_PaintDevice;
+
+    std::set<int> m_TrackedKeys;
+};