setToolTip and NSMatrix of NSButton

[Alain Birtz]

What is wrong with this code:

matrix_of_but is a NSMatrix of NSButton
NSButton *but;

but = [matrix_of_but cellAtRow:0 column:0];
[but setToolTip: @"tool"];


CW report this error (for the last line)

.... Unknown class Selection_View in Interface Builder file.
....*** -[NSButtonCell setToolTip:]: selector not recognized
....An uncaught exception was raised
....*** Uncaught exception: <NSInvalidArgumentException> *** -[NSButtonCell
setToolTip:]: selector not recognized

[Tom Harrington]

In article <abz-3007031606530001@192.168.1.3>,
[email]abz@videotron.ca[/email] (Alain Birtz) wrote:

> What is wrong with this code:
>
> matrix_of_but is a NSMatrix of NSButton
> NSButton *but;
>
> but = [matrix_of_but cellAtRow:0 column:0];
> [but setToolTip: @"tool"];

You're somewhat mistaken. An NSMatrix holds NSCell (or subclass)
objects. If the matrix has a bunch of buttons, then it's got a bunch of
NSButtonCell objects, not NSButtons.

> CW report this error (for the last line)
>
> ... Unknown class Selection_View in Interface Builder file.
> ...*** -[NSButtonCell setToolTip:]: selector not recognized
> ...An uncaught exception was raised
> ...*** Uncaught exception: <NSInvalidArgumentException> *** -[NSButtonCell
> setToolTip:]: selector not recognized

And that's where this error comes from. You retreived an NSButtonCell
and called -setToolTip on it. But NSButtonCell does not implement
-setToolTip.

You probably want to be using -[NSMatrix setToolTip:forCell].

--
Tom "Tom" Harrington
Macaroni, Automated System Maintenance for Mac OS X.
Version 1.4: Best cleanup yet, gets files other tools miss.
See [url]http://www.atomicbird.com/[/url]