Re: NSTableView -editColumn:row:withEvent:select: question

FROM : Ben Lachman
DATE : Sat Apr 19 00:11:11 2008

Well, you should be able to just override the drawing code, since 
thats really your problem.  Going directly against the docs, while it 
may work fine now, is playing with fire in my opinion.  To get the 
drawing you want, you can just implement 
tableView:willDisplayCell:forTableColumn:row: in the delegate and 
manually switch selection highlighting on or off depending on whether 
the table column passed to you is the selected table column.  You'll 
probably have to have a couple more cases if you're really trying to 
get close to the standard spreadsheet functionality that lets you 
select the full row/column by clicking on the header.  But this 
should get you started, hopefully.

->Ben
--
Ben Lachman
Acacia Tree Software

http://acaciatreesoftware.com

<email_removed>
740.590.0009



On Apr 18, 2008, at 1:55 PM, John Stiles wrote:
> The docs for -editColumn:row:withEvent:select:  ominously claim:
>    The row at rowIndex must be selected prior to calling 
> editColumn:row:withEvent:select:, or an exception will be raised.
>
> I'm implementing a subclass of NSTableView which behaves a little 
> more like an Excel spreadsheet—it maintains a phony selection by 
> overloading -mouseDown/Dragged/Up: and coloring cell backgrounds as 
> appropriate. It works great. But it means that the table view, 
> internally, never actually considers a row to be "selected." My 
> subclass handles that entirely on its own and leaves the table view 
> out of it.
>
> Now I'm getting around to implementing the part where the user can 
> edit table cells in place, and since I wanted to follow the rules 
> in the docs, I started by implementing it like this:
>
>    [myTableView selectRow:inRow byExtendingSelection:NO];
>    [myTableView editColumn:inCol row:inRow withEvent:myEvent 
> select:NO];
>
> It worked fine but, of course, the entire row turned blue, ruining 
> the spreadsheet illusion.
> So just to see what would happen, I tried removing the call to -
> selectRow:: and, lo and behold! No exception. It worked great. 
> Looks just like how I want it to look.
>
> Am I getting lucky here? Are the docs just wrong? I don't want to 
> do something overtly dangerous, but in practice it does exactly 
> what I want... are there any gotchas?
>
> I'm on Leopard FWIW, and don't need to target older OSes.
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