The empty name should be avoided and the same directory name too. File name...

The empty name should be avoided and the same directory name too. File name could have the same name this is as before

src/gui/UBDocumentTreeWidget.cpp

@@ -84,8 +84,8 @@ void UBDocumentTreeWidget::onItemPressed(QTreeWidgetItem* item, int column)
 void UBDocumentTreeWidget::itemChangedValidation(QTreeWidgetItem * item, int column)
 {
 
-//    QString emptyNameWarningTitle = tr("Empty name");
-//    QString emptyNameWarningText = tr("The name should not be empty. Please enter a valid name.");
+    QString emptyNameWarningTitle = tr("Empty name");
+    QString emptyNameWarningText = tr("The name should not be empty. Please enter a valid name.");
     QString alreadyExistsNameWarningTitle = tr("Name already used");
     QString alreadyExistsNameWarningText = tr("The actual name is in conflict with and existing. Please choose another one.");
 
@@ -94,33 +94,27 @@ void UBDocumentTreeWidget::itemChangedValidation(QTreeWidgetItem * item, int col
     if (treeItem)
     {
         QString name = treeItem->text(column);
-//        if(name.isEmpty())
-//            UBApplication::mainWindow->warning(emptyNameWarningTitle,emptyNameWarningText);
-
-
-        for(int i = 0; i < treeItem->parent()->childCount(); i++)
-        {
-            QTreeWidgetItem* childAtPosition = treeItem->parent()->child(i);
-
-            if (childAtPosition != item && childAtPosition->text(column) == name){
-                UBApplication::mainWindow->warning(alreadyExistsNameWarningTitle,alreadyExistsNameWarningText);
-                // This is not really a good way but at this time we are not yet out of the editing time
-                // this is not what is told by the name of the function itemChanged...
+        if(name.isEmpty()){
             mFailedValidationForTreeItem = item;
             mFailedValidationItemColumn = column;
+            UBApplication::mainWindow->warning(emptyNameWarningTitle,emptyNameWarningText);
             QTimer::singleShot(100,this,SLOT(validationFailed()));
             return;
         }
     }
-    }
 
 
     UBDocumentGroupTreeItem* group = dynamic_cast<UBDocumentGroupTreeItem *>(item);
     if(group)
     {
         QString name = group->text(column);
-//        if(name.isEmpty())
-//            UBApplication::mainWindow->warning(emptyNameWarningTitle,emptyNameWarningText);
+        if(name.isEmpty()){
+            mFailedValidationForTreeItem = item;
+            mFailedValidationItemColumn = column;
+            UBApplication::mainWindow->warning(emptyNameWarningTitle,emptyNameWarningText);
+            QTimer::singleShot(100,this,SLOT(validationFailed()));
+            return;
+        }
 
         if(group->parent()){
             for(int i = 0; i < group->parent()->childCount(); i++)