[nostalgia] Update Studio to handle tabs and open directory dialog on Mac, Update core::init

src/nostalgia/studio/lib/editor.hpp

@@ -11,12 +11,13 @@
 #include <ox/event/signal.hpp>
 
 #include "undostack.hpp"
+#include "widget.hpp"
 
 #include "nostalgiastudio_export.h"
 
 namespace nostalgia::studio {
 
-class NOSTALGIASTUDIO_EXPORT Editor: public ox::SignalHandler {
+class NOSTALGIASTUDIO_EXPORT Editor: public Widget {
 
 	private:
 		UndoStack m_cmdStack;
@@ -35,6 +36,8 @@ class NOSTALGIASTUDIO_EXPORT Editor: public ox::SignalHandler {
 		[[nodiscard]]
 		virtual ox::String itemName() const = 0;
 
+		virtual ox::String itemDisplayName() const;
+
 		virtual void cut();
 
 		virtual void copy();
@@ -43,6 +46,8 @@ class NOSTALGIASTUDIO_EXPORT Editor: public ox::SignalHandler {
 
 		virtual void exportFile();
 
+		void close();
+
 		/**
 		 * Save changes to item being edited.
 		 */
@@ -89,12 +94,14 @@ class NOSTALGIASTUDIO_EXPORT Editor: public ox::SignalHandler {
 		 */
 		virtual void saveItem();
 
+	// slots
 	public:
 		ox::Signal<ox::Error(bool)> unsavedChangesChanged;
 		ox::Signal<ox::Error(bool)> exportableChanged;
 		ox::Signal<ox::Error(bool)> cutEnabledChanged;
 		ox::Signal<ox::Error(bool)> copyEnabledChanged;
 		ox::Signal<ox::Error(bool)> pasteEnabledChanged;
+		ox::Signal<ox::Error(const ox::String&)> closed;
 
 };