refactor: add GUI instance reference to UI nodes

src/graphics/ui/elements/CheckBox.hpp

@@ -2,8 +2,8 @@
 
 #include <utility>
 
-#include "Panel.hpp"
 #include "Label.hpp"
+#include "Panel.hpp"
 
 namespace gui {
     class CheckBox : public UINode {
@@ -13,11 +13,12 @@ namespace gui {
         boolconsumer consumer = nullptr;
         bool checked = false;
     public:
-        CheckBox(bool checked=false);
+        explicit CheckBox(GUI& gui, bool checked = false);
 
-        virtual void draw(const DrawContext& pctx, const Assets& assets) override;
+        virtual void draw(const DrawContext& pctx, const Assets& assets)
+            override;
 
-        virtual void mouseRelease(GUI*, int x, int y) override;
+        virtual void mouseRelease(int x, int y) override;
 
         virtual void setSupplier(boolsupplier supplier);
         virtual void setConsumer(boolconsumer consumer);
@@ -25,8 +26,7 @@ namespace gui {
         virtual CheckBox* setChecked(bool flag);
 
         virtual bool isChecked() const {
-            if (supplier)
-                return supplier();
+            if (supplier) return supplier();
             return checked;
         }
     };
@@ -36,7 +36,12 @@ namespace gui {
         std::shared_ptr<CheckBox> checkbox;
         std::shared_ptr<Label> label;
     public:
-        FullCheckBox(const std::wstring& text, glm::vec2 size, bool checked=false);
+        explicit FullCheckBox(
+            GUI& gui,
+            const std::wstring& text,
+            glm::vec2 size,
+            bool checked = false
+        );
 
         virtual void setSupplier(boolsupplier supplier) {
             checkbox->setSupplier(std::move(supplier));