const'ify

kcmtreeitem.cpp

@@ -51,18 +51,18 @@ KcmTreeItem *KcmTreeItem::child(const int row)
     return nullptr;
 }
 
-int KcmTreeItem::childCount()
+int KcmTreeItem::childCount() const
 {
     return m_children.count();
 }
 
-int KcmTreeItem::columnCount()
+int KcmTreeItem::columnCount() const
 {
     // Hard coded, menu should never have more than one column
     return 1;
 }
 
-KcmTreeItem *KcmTreeItem::parent()
+KcmTreeItem *KcmTreeItem::parent() const
 {
     return m_parent;
 }

kcmtreeitem.h

@@ -77,12 +77,12 @@ class KcmTreeItem
         /**
         * Get amount of children
         */
-        int childCount();
+        int childCount() const;
 
         /**
         * Get parent of current tree item
         */
-        KcmTreeItem *parent();
+        KcmTreeItem *parent() const;
 
         /**
         * Get index of tree item
@@ -93,7 +93,7 @@ class KcmTreeItem
         * Get amount of columns that tree item contains.
         * Hardcoded to 1
         */
-        int columnCount();
+        int columnCount() const;
 
         /**
         * Get row of tree item