[nostalgia/studio] Move undo stack to Editor

src/nostalgia/studio/lib/editor.cpp

@@ -13,10 +13,6 @@ namespace nostalgia::studio {
 Editor::Editor(QWidget *parent): QWidget(parent) {
 }
 
-QUndoStack *Editor::undoStack() {
-	return nullptr;
-}
-
 void Editor::save() {
     saveItem();
     setUnsavedChanges(false);
@@ -27,6 +23,10 @@ void Editor::setUnsavedChanges(bool uc) {
     emit unsavedChangesUpdate(uc);
 }
 
+QUndoStack *Editor::undoStack() {
+	return &m_cmdStack;
+}
+
 void Editor::saveItem() {
 }
 

src/nostalgia/studio/lib/editor.hpp

@@ -19,6 +19,7 @@ class NOSTALGIASTUDIO_EXPORT Editor: public QWidget {
 	Q_OBJECT
 
 	private:
+		QUndoStack m_cmdStack;
 		bool m_unsavedChanges = false;
 
 	public:
@@ -31,11 +32,6 @@ class NOSTALGIASTUDIO_EXPORT Editor: public QWidget {
 		 */
 		virtual QString itemName() = 0;
 
-		/**
-		 * Returns the undo stack holding changes to the item being edited.
-		 */
-		virtual QUndoStack *undoStack();
-
 		/**
 		 * Save changes to item being edited.
 		 */
@@ -47,6 +43,11 @@ class NOSTALGIASTUDIO_EXPORT Editor: public QWidget {
 		 */
 		void setUnsavedChanges(bool);
 
+		/**
+		 * Returns the undo stack holding changes to the item being edited.
+		 */
+		QUndoStack *undoStack();
+
 	protected:
 		/**
 		 * Save changes to item being edited.