IDEA-139647 Change signature: focus is lost while typing parameter name/value

platform/lang-impl/src/com/intellij/refactoring/changeSignature/ParameterTableModelBase.java

@@ -64,13 +64,7 @@ public abstract class ParameterTableModelBase<P extends ParameterInfo, TableItem
   }
 
   public void setValueAtWithoutUpdate(Object aValue, int rowIndex, int columnIndex) {
-    super.setValueAt(aValue, rowIndex, columnIndex);
-  }
-
-  @Override
-  public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
-    super.setValueAt(aValue, rowIndex, columnIndex);
-    fireTableCellUpdated(rowIndex, columnIndex); // to update signature
+    setValueAt(aValue, rowIndex, columnIndex, false);
   }
 
   protected static abstract class ColumnInfoBase<P extends ParameterInfo, TableItem extends ParameterTableModelItemBase<P>, Aspect>

platform/util/src/com/intellij/util/ui/ListTableModel.java

@@ -113,10 +113,23 @@ public class ListTableModel<Item> extends TableViewModel<Item> implements Editab
 
   @Override
   public void setValueAt(Object aValue, int rowIndex, int columnIndex) {
+    setValueAt(aValue, rowIndex, columnIndex, true);
+  }
+
+  /**
+   * Sets the value in the cell at {@code columnIndex} and {@code rowIndex} to {@code aValue}.
+   * This method allows to choose will the model listeners notified or not.
+   *
+   * @param aValue          the new value
+   * @param rowIndex        the row whose value is to be changed
+   * @param columnIndex     the column whose value is to be changed
+   * @param notifyListeners indicates whether the model listeners are notified
+   */
+  public void setValueAt(Object aValue, int rowIndex, int columnIndex, boolean notifyListeners) {
     if (rowIndex < myItems.size()) {
       myColumnInfos[columnIndex].setValue(getItem(rowIndex), aValue);
     }
-    fireTableCellUpdated(rowIndex, columnIndex);
+    if (notifyListeners) fireTableCellUpdated(rowIndex, columnIndex);
   }
 
   /**