3 files changed, 28 insertions, 3 deletions
diff --git a/src/core/kcoreconfigskeleton.cpp b/src/core/kcoreconfigskeleton.cpp
index 7566301b..be2fe27c 100644
--- a/src/core/kcoreconfigskeleton.cpp
+++ b/src/core/kcoreconfigskeleton.cpp
@@ -205,7 +205,13 @@ QVariant KPropertySkeletonItem::property() const
 void KPropertySkeletonItem::setProperty(const QVariant &p)
 {
     Q_D(KPropertySkeletonItem);
+    if (d->mReference == p) {
+        return;
+    }
     d->mReference = p;
+    if (d->mNotifyFunction) {
+        d->mNotifyFunction();
+    }
 }
 
 bool KPropertySkeletonItem::isEqual(const QVariant &p) const
@@ -217,7 +223,7 @@ bool KPropertySkeletonItem::isEqual(const QVariant &p) const
 void KPropertySkeletonItem::readConfig(KConfig *)
 {
     Q_D(KPropertySkeletonItem);
-    d->mReference = d->mObject->property(d->mPropertyName.constData());
+    setProperty(d->mObject->property(d->mPropertyName.constData()));
     d->mLoadedValue = d->mReference;
 }
 
@@ -231,19 +237,31 @@ void KPropertySkeletonItem::writeConfig(KConfig *)
 void KPropertySkeletonItem::readDefault(KConfig *)
 {
     Q_D(KPropertySkeletonItem);
-    d->mReference = d->mConstDefaultValue;
+    setProperty(d->mConstDefaultValue);
 }
 
 void KPropertySkeletonItem::setDefault()
 {
     Q_D(KPropertySkeletonItem);
-    d->mReference = d->mDefaultValue;
+    setProperty(d->mDefaultValue);
 }
 
 void KPropertySkeletonItem::swapDefault()
 {
     Q_D(KPropertySkeletonItem);
+    if (d->mReference == d->mDefaultValue) {
+        return;
+    }
     std::swap(d->mReference, d->mDefaultValue);
+    if (d->mNotifyFunction) {
+        d->mNotifyFunction();
+    }
+}
+
+void KPropertySkeletonItem::setNotifyFunction(const std::function<void ()> &impl)
+{
+    Q_D(KPropertySkeletonItem);
+    d->mNotifyFunction = impl;
 }
 
 KCoreConfigSkeleton::ItemString::ItemString(const QString &_group, const QString &_key,
diff --git a/src/core/kcoreconfigskeleton.h b/src/core/kcoreconfigskeleton.h
index a6f58ebe..7abc4052 100644
--- a/src/core/kcoreconfigskeleton.h
+++ b/src/core/kcoreconfigskeleton.h
@@ -294,6 +294,12 @@ public:
     void setDefault() override;
     /** @copydoc KConfigSkeletonItem::swapDefault() */
     void swapDefault() override;
+
+    /**
+     * Set a notify function, it will be invoked when the value of the property changes.
+     * @since 5.68
+     */
+    void setNotifyFunction(const std::function<void ()> &impl);
 };
 
 
diff --git a/src/core/kcoreconfigskeleton_p.h b/src/core/kcoreconfigskeleton_p.h
index 19f6f4bb..871122c0 100644
--- a/src/core/kcoreconfigskeleton_p.h
+++ b/src/core/kcoreconfigskeleton_p.h
@@ -86,6 +86,7 @@ public:
     const QVariant mConstDefaultValue;
     QVariant mReference;
     QVariant mLoadedValue;
+    std::function<void()> mNotifyFunction;
 };