Added count() method to ElementsCollectionItem class and its subclasses.

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/branches/0.3@1216 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/elementscollectionitem.h

@@ -202,5 +202,13 @@ class ElementsCollectionItem : public QObject {
 		@return un nouvel element cree a partir d'un chemin virtuel
 	*/
 	virtual ElementDefinition *createElement(const QString &) = 0;
+	/**
+		@return true if the item is empty, false otherwise
+	*/
+	virtual bool isEmpty() = 0;
+	/**
+		@return the count of categories and elements within this item
+	*/
+	virtual int count() = 0;
 };
 #endif