Nested NSNotification for NSTableViews - objective-c

Question

I have two table views controlling the display/sorting of a collection of objects (namely, by Category and Localization, i.e. Lieu).
My problem is : I want the selection to be updated when the user clicks on a cell inside any of those Table Views (which is working just fine using NSTableViewDelegate), but I also want to restore the selection to the default one in the other Table View.
My problem is then obvious : every call to tableViewSelectionDidChange triggers another call to himself, which makes the result quiet unstable. Is there a way to prevent this call [tableViewCategory selectRowIndexes:[NSIndexSet indexSetWithIndex:0] byExtendingSelection:NO]; from triggering a notification ?
- (void)tableViewSelectionDidChange:(NSNotification *)aNotification
{
if ([[[aNotification object]identifier]isEqualToString:#"table2"]){
//First, reset AnnonceWithCategory
[tableViewCategory selectRowIndexes:[NSIndexSet indexSetWithIndex:0] byExtendingSelection:NO];
//Then
[self showAnnoncesWithLieu];
}
else if ([[[aNotification object]identifier]isEqualToString:#"table3"]){
//First, reset AnnonceWithLieu
[tableViewLieu selectRowIndexes:[NSIndexSet indexSetWithIndex:0] byExtendingSelection:NO];
[self showAnnoncesWithCategory];
}
}

Answer 1

You can't prevent the NSTableView from sending the notification, but you can prevent your class from responding to it. You could do something like this:
- (void)tableViewSelectionDidChange:(NSNotification *)aNotification
{
if ([[[aNotification object]identifier]isEqualToString:#"table2"] && ! _currentlyUpdatingTable2){
//First, reset AnnonceWithCategory
_currentlyUpdatingTable2 = YES;
[tableViewCategory selectRowIndexes:[NSIndexSet indexSetWithIndex:0] byExtendingSelection:NO];
_currentlyUpdatingTable2 = NO;
//Then
[self showAnnoncesWithLieu];
}
else if ([[[aNotification object]identifier]isEqualToString:#"table3"] && ! _currentlyUpdatingTable3){
//First, reset AnnonceWithLieu
_currentlyUpdatingTable3 = YES;
[tableViewLieu selectRowIndexes:[NSIndexSet indexSetWithIndex:0] byExtendingSelection:NO];
_currentlyUpdatingTable3 = NO;
[self showAnnoncesWithCategory];
}
}
...where _currentlyUpdatingTable2 and _currentlyUpdatingTable3 are ivars of the object receiving the notification.