Layers and Events

include/utils/Layers/Layer.h

@@ -0,0 +1,15 @@
+#include "pch.hpp"
+#include "utils/Events/Event.h"
+
+class Layer {
+
+    virtual ~Layer() {}
+
+    virtual void onRender() = 0;
+
+    virtual void onAttach() = 0;
+
+    virtual void onDetach() = 0;
+
+    virtual bool onEvent(const Event&) = 0;
+};

include/utils/Layers/Layerstack.h

@@ -0,0 +1,31 @@
+#include "pch.hpp"
+#include "Layer.h"
+
+class Layerstack {
+
+    public:
+        Layerstack() {}
+
+        ~Layerstack() {
+            while(!lstack.empty()) {
+                pop();
+            }
+        }
+
+        void push(Layer* l) { lstack.push_front(l); }
+
+        void pop() {
+            Layer* l = lstack.front();
+            lstack.pop_front();
+            delete l;
+        }
+
+        void renderAll() {
+            for(Layer* l : lstack)
+                l->onRender();
+        }
+
+    private:
+
+        std::list<Layer*> lstack;
+};