misc hud-related updates

src/frontend/hud.h

@@ -25,8 +25,40 @@ namespace gui {
 	class GUI;
 	class UINode;
     class Panel;
+	class Container;
 }
 
+enum class hud_element_mode {
+	// element is hidden if menu or inventory open
+	ingame,
+	// element is visible if hud is visible
+	permanent,
+	// element is visible in inventory mode
+	inventory_any,
+	// element will be removed on inventory close
+	inventory_bound
+};
+
+class HudElement {
+	hud_element_mode mode;
+	UiDocument* document;
+	std::shared_ptr<gui::UINode> node;
+
+	bool debug;
+	bool removed = false;
+public:
+	HudElement(hud_element_mode mode, UiDocument* document, std::shared_ptr<gui::UINode> node, bool debug);
+
+	void update(bool pause, bool inventoryOpen, bool debug);
+
+	UiDocument* getDocument() const;
+	std::shared_ptr<gui::UINode> getNode() const;
+
+	bool isRemoved() const {
+		return removed;
+	}
+};
+
 class HudRenderer {
     Assets* assets;
 	std::unique_ptr<Camera> uicamera;
@@ -38,7 +70,7 @@ class HudRenderer {
 	bool inventoryOpen = false;
 	bool pause = false;
 
-    std::shared_ptr<gui::Panel> contentAccessPanel;
+    std::shared_ptr<gui::Container> contentAccessPanel;
     std::shared_ptr<InventoryView> contentAccess;
     std::shared_ptr<InventoryView> hotbarView;
 	std::shared_ptr<gui::UINode> debugPanel;
@@ -48,8 +80,9 @@ class HudRenderer {
 	gui::GUI* gui;
 	LevelFrontend* frontend;
 
+	std::vector<HudElement> elements;
+
     std::shared_ptr<InventoryView> inventoryView = nullptr;
-    UiDocument* inventoryDocument = nullptr;
 
     std::shared_ptr<gui::UINode> createDebugPanel(Engine* engine);
     std::shared_ptr<InventoryView> createContentAccess();
@@ -68,6 +101,9 @@ public:
 
     void openInventory();
     void closeInventory();
+
+	void add(HudElement element);
+	void remove(HudElement& element);
 };
 
 #endif /* SRC_HUD_H_ */