[nostalgia/studio] Start on ImGui version of Studio

src/nostalgia/studio/lib/editor.hpp

@@ -8,18 +8,18 @@
 
 #pragma once
 
-#include <QUndoStack>
-#include <QWidget>
+#include <ox/event/signal.hpp>
+
+#include "undostack.hpp"
 
 #include "nostalgiastudio_export.h"
 
 namespace nostalgia::studio {
 
-class NOSTALGIASTUDIO_EXPORT Editor: public QWidget {
-	Q_OBJECT
+class NOSTALGIASTUDIO_EXPORT Editor: public ox::SignalHandler {
 
 	private:
-		QUndoStack m_cmdStack;
+		UndoStack m_cmdStack;
 		bool m_unsavedChanges = false;
 		bool m_exportable = false;
 		bool m_cutEnabled = false;
@@ -27,15 +27,13 @@ class NOSTALGIASTUDIO_EXPORT Editor: public QWidget {
 		bool m_pasteEnabled = false;
 
 	public:
-		explicit Editor(QWidget *parent);
-
 		~Editor() override = default;
 
 		/**
 		 * Returns the name of item being edited.
 		 */
 		[[nodiscard]]
-		virtual QString itemName() const = 0;
+		virtual ox::String itemName() const = 0;
 
 		virtual void cut();
 
@@ -63,7 +61,7 @@ class NOSTALGIASTUDIO_EXPORT Editor: public QWidget {
 		 * Returns the undo stack holding changes to the item being edited.
 		 */
 		[[nodiscard]]
-		QUndoStack *undoStack();
+		UndoStack *undoStack();
 
 		void setExportable(bool);
 
@@ -91,16 +89,12 @@ class NOSTALGIASTUDIO_EXPORT Editor: public QWidget {
 		 */
 		virtual void saveItem();
 
-	signals:
-		void unsavedChangesChanged(bool);
-
-		void exportableChanged(bool);
-
-		void cutEnabledChanged(bool);
-
-		void copyEnabledChanged(bool);
-
-		void pasteEnabledChanged(bool);
+	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;
 
 };