1 files changed, 19 insertions, 0 deletions
diff --git a/src/core/state.h b/src/core/state.h
new file mode 100644
index 0000000..623f1c2
--- /dev/null
+++ b/src/core/state.h
@@ -0,0 +1,19 @@
+#pragma once
+
+#include "event.h"
+
+namespace Donut
+{
+    class State
+    {
+    public:
+        virtual ~State() = default;
+
+        virtual auto on_enter() -> void                  = 0;
+        virtual auto on_exit() -> void                   = 0;
+        virtual auto on_update(float delta_time) -> void = 0;
+        virtual auto on_render() -> void                 = 0;
+        virtual auto on_im_ui_render() -> void           = 0;
+        virtual auto on_event(Event& event) -> void      = 0;
+    };
+};