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Brass · Jun 16, 2002, 05:37 PM

Hi all. I can't get this NSTableView method to work! Can somebody help me?

The relevant part of my program looks a bit like this:

<blockquote>code:<hr /><pre style="font-size:x-small; font-family: monospace;">
(code to initialize empty tableViewSource earlier)

[tableViewSource addObject:@""];
[aTableView reloadData];
[aTableView editColumn:0 row:0 withEvent:nil select:NO];
</pre><hr /></blockquote>(I've also tried it with select:YES which made no difference). What I'm trying to do here, is add a row to the (previously empty) NSTableView and then start editing the new (and only) row so that whatever the user types next appears in that row (first column).

Well all except the last line of code above appears to work. tableViewSource gets an empty string added, and the NSTableView gets a new row added. But when it comes to executing the last line nothing happens except and the following error is logged:

<blockquote>code:<hr /><pre style="font-size:x-small; font-family: monospace;">
<date, time & program> *** Assertion failure in -[NSTableView editColumn:row:withEvent:select:], NSTableView.m:2207
<date, time & program> Invalid parameter not satisfying: _lastSelectedRow == row
</pre><hr /></blockquote>Can anyone explain what this error means, and how I go about fixing the problem?

Thanks in advance.

[ 06-16-2002, 06:51 PM: Message edited by: Brass ]

Ghoser777 · Jun 16, 2002, 06:33 PM

From the docs:

<blockquote>quote:<hr />
The row at rowIndex must be selected prior to calling editColumn:row:withEvent:select:, or an exception will be raised.
<hr /></blockquote>Yes, the docs are your friend. Sometimes, they are your only friend.

HTH,
F-bacher

Brass · Jun 16, 2002, 06:41 PM

<blockquote>quote:<hr />Originally posted by Ghoser777:
From the docs:

<blockquote>quote:<hr />
The row at rowIndex must be selected prior to calling editColumn:row:withEvent:select:, or an exception will be raised.
<hr /></blockquote>Yes, the docs are your friend. Sometimes, they are your only friend.

HTH,
F-bacher<hr /></blockquote>Interesting. I did already try this (simply by guesswork) - I tried putting a line immediately before the edit method to select that row:

[aTableView selectRow:0 byExtendingSelection:NO];

It produced a different error so I removed it again. But at least now I know I'll have to put it back, and that the row selection error is the one I need to solve, not the table cell edit error. I'll have to report back if I have trouble solving that one.

By the way, could you tell me where that warning you quoted was documented? I'm all for using the documentation, but I'm not familiar with the doco yet. Perhaps if I could figure out which doco that is in, I can solve the error I'm having with row selection. That warning certainly wasn't obvious in the documentation I read on that method! Here is all the documentation that I know of for that method:

<blockquote>quote:<hr />
- (void)editColumn

int)columnIndex row

int)rowIndex withEvent

NSEvent *)theEvent select

BOOL)flag

Edits the cell at columnIndex and rowIndex, selecting its entire contents if flag is YES. This method is invoked automatically in response to user actions; you should rarely need to invoke it directly. theEvent is usually the mouse event that triggered editing; it can be nil when starting an edit programmatically.

This method scrolls the receiver so that the cell is visible, sets up the field editor, and sends selectWithFrame:inView:editor:delegate:start:lengt h: and editWithFrame:inView:editor:delegate:event: to the field editor's NSCell object with the NSTableView as the text delegate.

See Also: - editedColumn, - editedRow <hr /></blockquote>

[ 06-16-2002, 11:22 PM: Message edited by: Brass ]

Ghoser777 · Jun 16, 2002, 10:32 PM

Okay, let me rephrase: UPDATED documetnation is your friend

I have the April's Beta Dev Tools installed, so my local docs are fairly recent. To get the most up to date ones, just go to apple's developer site and search for them (there's a link to the toc, but I'm too lazy to every bookmark it)

F-bacher

Brass · Jun 16, 2002, 10:37 PM

heheh... okay, that makes sense. Thanks.