diff --git a/src/kdescendantsproxymodel.h b/src/kdescendantsproxymodel.h
--- a/src/kdescendantsproxymodel.h
+++ b/src/kdescendantsproxymodel.h
@@ -72,6 +72,10 @@
 {
     Q_OBJECT
 
+    Q_PROPERTY(QAbstractItemModel *model READ sourceModel WRITE setSourceModel NOTIFY sourceModelChanged)
+    Q_PROPERTY(bool displayAncestorData READ displayAncestorData WRITE setDisplayAncestorData NOTIFY displayAncestorDataChanged)
+    Q_PROPERTY(QString ancestorSeparator READ ancestorSeparator WRITE setAncestorSeparator NOTIFY ancestorSeparatorChanged)
+
 public:
 
     /**
@@ -176,6 +180,11 @@
     virtual QModelIndexList match(const QModelIndex &start, int role, const QVariant &value,
                                   int hits = 1, Qt::MatchFlags flags = Qt::MatchFlags(Qt::MatchStartsWith | Qt::MatchWrap)) const override;
 
+Q_SIGNALS:
+    void sourceModelChanged();
+    void displayAncestorDataChanged();
+    void ancestorSeparatorChanged();
+
 private:
     Q_DECLARE_PRIVATE(KDescendantsProxyModel)
     //@cond PRIVATE
diff --git a/src/kdescendantsproxymodel.cpp b/src/kdescendantsproxymodel.cpp
--- a/src/kdescendantsproxymodel.cpp
+++ b/src/kdescendantsproxymodel.cpp
@@ -229,6 +229,7 @@
     bool displayChanged = (display != d->m_displayAncestorData);
     d->m_displayAncestorData = display;
     if (displayChanged) {
+        emit displayAncestorDataChanged();
         // send out big hammer. Everything needs to be updated.
         emit dataChanged(index(0,0),index(rowCount()-1,columnCount()-1),  changedRoles);
     }
@@ -245,9 +246,12 @@
     Q_D(KDescendantsProxyModel);
     bool separatorChanged = (separator != d->m_ancestorSeparator);
     d->m_ancestorSeparator = separator;
-    if (separatorChanged && d->m_displayAncestorData) {
-        // send out big hammer. Everything needs to be updated.
-        emit dataChanged(index(0,0),index(rowCount()-1,columnCount()-1),  changedRoles);
+    if (separatorChanged) {
+        emit ancestorSeparatorChanged();
+        if (d->m_displayAncestorData) {
+            // send out big hammer. Everything needs to be updated.
+            emit dataChanged(index(0,0),index(rowCount()-1,columnCount()-1),  changedRoles);
+        }
     }
 }
 
@@ -312,6 +316,7 @@
     }
 
     endResetModel();
+    emit sourceModelChanged();
 }
 
 QModelIndex KDescendantsProxyModel::parent(const QModelIndex &index) const