Master element : bug fix

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@3630 bfdf4180-ca20-0410-9c96-a3a8aa849046

dev_doc/enum_type_of_QGraphicsItem

@@ -1,4 +1,5 @@
 		Type = UserType + ???
+###DIAGRAM EDITOR###
 Element + 1000
 Conductor + 1001
 Terminal + 1002
@@ -10,3 +11,13 @@ DiagramImageItem + 1007
 QetShapItem + 1008
 crossRefItem + 1009
 ElementPrimitiveDecorator + 2200
+
+###ELEMENT EDITOR###
+part arc        + 1101
+part ellipse    + 1103
+part Line       + 1104
+part polygon    + 1105
+part terminal   + 1106
+part text       + 1107
+part text field + 1108
+part rectangle  + 1109

sources/qetgraphicsitem/masterelement.cpp

@@ -149,10 +149,14 @@ void MasterElement::updateLabel(DiagramContext old_info, DiagramContext new_info
  * Check if Xref item must be displayed, if not, delete it.
  * If Xref item is deleted or already not used (nullptr) return true;
  * Else return false if Xref item is used
+ * NOTICE : Xref can display nothing but not be deleted so far.
+ * For exemple, if Xref is display has cross, only power contact are linked and
+ * option show power contact is disable, the cross isn't draw.
  * @return
  */
 bool MasterElement::aboutDeleteXref() {
 	if(!cri_) return true;
+	if(!linkedElements().isEmpty()) return false;
 
 	if (cri_ -> boundingRect().isNull()) {
 		delete cri_;