Mac Forum / Programming / Mac Programming / March 2007

I've used both sliders and level indicators but when I try to use them
in a table/outline view, I always get zero for the value; Initially I
set them up as this in a subclass of NSTableColumn:

  NSLevelIndicatorCell * cell = [[[NSLevelIndicatorCell alloc]
    initWithLevelIndicatorStyle:NSDiscreteCapacityLevelIndicatorStyle]
    autorelease];
  [cell setTarget:item];
  [cell setAction:@selector(cellLevel:)];
  [cell setIntValue:[[item wins] intValue]];
  [cell setMinValue:[[item place] intValue]];
  [cell setMaxValue:[[item show] intValue]];
  [cell setNumberOfTickMarks:0];
  [cell setTitle:[item name]];
  return cell;

then in the class for the item (the action routine) I do this:

- (IBAction)cellLevel:(id)sender
{
  int col = [sender clickedColumn];
  id tableColumn = [[sender tableColumns] objectAtIndex:col];
  id cell = [tableColumn dataCellForRow:[sender clickedRow]];
  int value = [cell intValue];

  [self setWins:[NSNumber numberWithInt:[cell intValue]]];
  [sender reloadData];

  NSLog(@"%@ '%@' level = %d", [cell className], [cell title], value);
}

but 'value' is always zero; the visual does indicate the user action so
I know I'm doing something wrong but not sure what; I get similar
results for a slider.

p.s. if there are examples of either tableview cell usages, please let
me know that too, thanks.