Added visualization for unclean undo stack. (No safe guard before closing on an unclean stack yet.)

ListPage.qml

@@ -5,24 +5,45 @@ import QtQuick.Controls.Material
 Page {
     id: page
 
-    ListView {
-        id: listView
+    ColumnLayout {
         anchors.fill: parent
-        focus: true
-        clip: true
 
-        model: mainModel
+        ListView {
+            id: listView
+            Layout.fillWidth: true
+            Layout.fillHeight: true
+            focus: true
+            clip: true
 
-        // delegate: ListItemDelegate {}
-        delegate: ExpandableItemDelegate {}
-        // delegate: EditableItemDelegate {}
-        delegateModelAccess: DelegateModel.ReadWrite
+            model: mainModel
 
-        header: bannercomponent
-        footer: Rectangle {
-            width: parent.width
-            height: 30
-            gradient: mainGradient
+            // delegate: ListItemDelegate {}
+            delegate: ExpandableItemDelegate {}
+            // delegate: EditableItemDelegate {}
+            delegateModelAccess: DelegateModel.ReadWrite
+
+            header: bannercomponent
+            footer: Rectangle {
+                width: parent.width
+                height: 30
+                gradient: mainGradient
+            }
+        }
+        Button {
+            Layout.fillWidth: true
+            text: "Undo: " + appUndoStack.undoText
+            enabled: appUndoStack.canUndo
+            onClicked: {
+                appUndoStack.undo()
+            }
+        }
+        Button {
+            Layout.fillWidth: true
+            text: "Redo: " + appUndoStack.redoText
+            enabled: appUndoStack.canRedo
+            onClicked: {
+                appUndoStack.redo()
+            }
         }
     }
 

Main.qml

@@ -1,13 +1,19 @@
 import QtQuick
+import QtQuick.Controls.Material
 import QtQuick.Layouts
 import QtQml.Models
 
 Window {
+    property bool isDataModified: !appUndoStack.isClean
+
+    property string titleClean: `${Application.name}`
+    property string titleDirty: `${Application.name}` + " *"
+
     id: window
     width: 480
     height: 800
     visible: true
-    title: `${Application.name}`
+    title: appUndoStack.clean ? titleClean : titleDirty
 
     property int fontSize: 16
 
@@ -29,4 +35,18 @@ Window {
         id: listPage
         anchors.fill: parent
     }
+
+    Component.onCompleted: {
+        // core.displayStatusMessage.connect(displayStatusMessage)
+        appUndoStack.cleanChanged.connect(cleanChanged)
+        // core.userConfigChanged.connect(onUserConfigChanged)
+    }
+
+    function cleanChanged() {
+        let clean = appUndoStack.clean
+        console.debug("Clean state changed to: " + clean)
+        // if (!clean) {
+        //     footerText.text = ""
+        // }
+    }
 }

main.cpp

@@ -1,8 +1,9 @@
 #include <QGuiApplication>
 #include <QQmlApplicationEngine>
 #include <QQmlContext>
+#include <QUndoCommand>
 
-#include <model/generalsortfiltermodel.h>
+#include "model/generalsortfiltermodel.h"
 
 #include "genericcore.h"
 
@@ -18,6 +19,7 @@ int main(int argc, char* argv[]) {
   QGuiApplication app(argc, argv);
   std::unique_ptr<GenericCore> core                 = std::make_unique<GenericCore>();
   std::shared_ptr<GeneralSortFilterModel> mainModel = core->getSortFilterModel();
+  QUndoStack* undoStack                             = core->getModelUndoStack();
 
   // qInfo() << "QMLApp Version:" << QMLAPP_VERSION;
   qInfo() << "core->getString():" << core->toString();
@@ -25,6 +27,7 @@ int main(int argc, char* argv[]) {
   QQmlApplicationEngine engine;
   engine.rootContext()->setContextProperty(QStringLiteral("core"), core.get());
   engine.rootContext()->setContextProperty(QStringLiteral("mainModel"), mainModel.get());
+  engine.rootContext()->setContextProperty(QStringLiteral("appUndoStack"), undoStack);
 
   QObject::connect(
       &engine, &QQmlApplicationEngine::objectCreationFailed, &app,