Re: NSButtonCell in NSTableView problem

[Andreas Höschler]

> > I am pulling my hair out. In a preferences panel I am building a
> > tableView manually with three columns, one tableColumn with a button
> > cell:
> >
> >         tableColumn  = [[NSTableColumn alloc] 
> > initWithIdentifier:@"active"];
> >
> >                NSButtonCell *buttonCell = [[GSButtonCell alloc]
> > initTextCell:@""];
> >                [buttonCell setButtonType:NSSwitchButton];
> >                [buttonCell setImagePosition:NSImageOnly];
> >                [buttonCell setSelectable:NO];
> >                [tableColumn setDataCell:buttonCell];
> >                [buttonCell release];
> >
> >                [(NSCell *)[tableColumn dataCell]
> > setAlignment:NSCenterTextAlignment];
> >
> >        [tableView addTableColumn:tableColumn];
> >
> >     [tableView setDataSource:self];
> >     [tableView setDelegate:self];
> >     [[tableView tableColumnWithIdentifier:@"active"] setEditable:YES];
> >     [[[tableView tableColumnWithIdentifier:@"active"] dataCell]
> > setEditable:YES];
> >     [[[tableView tableColumnWithIdentifier:@"active"] dataCell]
> > setSelectable:YES];
> >
> > When I click on the switch I expect
> >
> > - (void)tableView:(NSTableView *)tableView setObjectValue:(id)object
> > forTableColumn:(NSTableColumn *)tableColumn row:(int)row;
> >
> > to be called but that is not the case. If I doubleclick into one of 
> > the
> > NSTextFieldCells and end editing then the method is called!? What am I
> > missing. This neither works on GNustep nor on MacOSX so I must be
> > missing something obvious but I don't see what. Any idea?
> >
> > Thanks a lot,
> >
> >    Andreas
>
> I am not sure about that but I think clicking on Checkboxes and
> buttons in NSTableView is not considered as "editing".
>
> And, there might be some relation between [buttonCell
> setSelectable:NO]; and a cell being editable.
>
> BTW: Why do you use GSButtonCell?

GSButtonCell is my subclass on NSButtonCell. It does nothing right now.

In the meanwhile I figured out why this was not working. I used the 
wrong NSTableView sublclass that swallowed the mouseDown: event. Having 
an NSButtonCell in a tableview actually works if

• the buttonCell has  selectable=NO, editable=NO
• the tableColumn has editable=YES

You get unreasonable behaviour, if you set the buttonCell to 
selectable=YES, editable=YES. This allows you to tab into the cell 
which is great but

- (void)tableView:(NSTableView *)tableView setObjectValue:(id)object 
forTableColumn:(NSTableColumn *)tableColumn row:(int)row;

is called with wrong values then. :-( But I can live with having to use 
the mouse for setting the checkbox to state=1 for a while.

Thanks,

  Andreas