Add controller button icons in hotkeys, separate keyboard hotkeys and controller hotkeys

include/gui/Image.hpp

@@ -0,0 +1,29 @@
+#pragma once
+
+#include "Widget.hpp"
+
+#include <mglpp/graphics/Sprite.hpp>
+
+namespace gsr {
+    class Image : public Widget {
+    public:
+        enum class ScaleBehavior {
+            SCALE,
+            CLAMP
+        };
+
+        // Set size to {0.0f, 0.0f} for no limit. The image is scaled to the size while keeping its aspect ratio
+        Image(mgl::Texture *texture, mgl::vec2f size, ScaleBehavior scale_behavior);
+        Image(const Image&) = delete;
+        Image& operator=(const Image&) = delete;
+
+        bool on_event(mgl::Event &event, mgl::Window &window, mgl::vec2f offset) override;
+        void draw(mgl::Window &window, mgl::vec2f offset) override;
+
+        mgl::vec2f get_size() override;
+    private:
+        mgl::Sprite sprite;
+        mgl::vec2f size;
+        ScaleBehavior scale_behavior;
+    };
+}