2 files changed, 9 insertions, 9 deletions
diff --git a/src/controls/Private/qquicktreemodeladaptor.cpp b/src/controls/Private/qquicktreemodeladaptor.cpp
index 70e038fe..5ab8467e 100644
--- a/src/controls/Private/qquicktreemodeladaptor.cpp
+++ b/src/controls/Private/qquicktreemodeladaptor.cpp
@@ -362,7 +362,7 @@ void QQuickTreeModelAdaptor::showModelChildItems(const TreeItem &parentItem, int
 }
 
 
-void QQuickTreeModelAdaptor::expand(QModelIndex idx)
+void QQuickTreeModelAdaptor::expand(const QModelIndex &idx)
 {
     ASSERT_CONSISTENCY();
     if (!idx.isValid() || !m_model->hasChildren(idx))
@@ -380,7 +380,7 @@ void QQuickTreeModelAdaptor::expand(QModelIndex idx)
     emit expanded(idx);
 }
 
-void QQuickTreeModelAdaptor::collapse(QModelIndex idx)
+void QQuickTreeModelAdaptor::collapse(const QModelIndex &idx)
 {
     ASSERT_CONSISTENCY();
     if (!idx.isValid() || !m_model->hasChildren(idx))
@@ -398,7 +398,7 @@ void QQuickTreeModelAdaptor::collapse(QModelIndex idx)
     emit collapsed(idx);
 }
 
-bool QQuickTreeModelAdaptor::isExpanded(QModelIndex index) const
+bool QQuickTreeModelAdaptor::isExpanded(const QModelIndex &index) const
 {
     ASSERT_CONSISTENCY();
     return !index.isValid() || m_expandedItems.contains(index);
diff --git a/src/controls/Private/qquicktreemodeladaptor_p.h b/src/controls/Private/qquicktreemodeladaptor_p.h
index 838ab805..98b1e49e 100644
--- a/src/controls/Private/qquicktreemodeladaptor_p.h
+++ b/src/controls/Private/qquicktreemodeladaptor_p.h
@@ -88,7 +88,7 @@ public:
     const QModelIndex &mapToModel(const QModelIndex &index) const;
     Q_INVOKABLE QModelIndex mapRowToModelIndex(int row) const;
 
-    Q_INVOKABLE QItemSelection selectionForRowRange(int form, int to) const;
+    Q_INVOKABLE QItemSelection selectionForRowRange(int from, int to) const;
 
     void showModelTopLevelItems(bool doInsertRows = true);
     void showModelChildItems(const TreeItem &parent, int start, int end, bool doInsertRows = true, bool doExpandPendingRows = true);
@@ -102,19 +102,19 @@ public:
     void collapseRow(int n);
     bool isExpanded(int row) const;
 
-    Q_INVOKABLE bool isExpanded(QModelIndex) const;
+    Q_INVOKABLE bool isExpanded(const QModelIndex &) const;
 
     void dump() const;
     bool testConsistency(bool dumpOnFail = false) const;
 
 signals:
     void modelChanged(QAbstractItemModel *model);
-    void expanded(QModelIndex index);
-    void collapsed(QModelIndex index);
+    void expanded(const QModelIndex &index);
+    void collapsed(const QModelIndex &index);
 
 public slots:
-    void expand(QModelIndex);
-    void collapse(QModelIndex);
+    void expand(const QModelIndex &);
+    void collapse(const QModelIndex &);
 
     void setModel(QAbstractItemModel *model);