Re: bug in NSBrowser ?

[Adam Fedor]

I tried your example on MacOSX and it didn't work at all (crashed), but 
after fixing a few things I found that GNUstep's NSBrowser does not 
really conform to the documentation. I fixed those parts, but I don't 
think that really helps you any. I think what you were doing before was 
querying the browser state in the middle of an update which was giving 
indeterminate results.

The delegate should really be getting a willDisplay message whenever it 
displays the cells, but that isn't happening now. Also, I found that 
MacOSX makes a further optimization of only 'loading' cells that are in 
the visible rect of the scroller. I'm not sure how it does that, but it 
must be a much tighter integration of Browser/Scroller/Matrix classes.

Yen-Ju Chen wrote:
>  Here is the example.
>  Simply select the directory and look at the NSLog output.
>  First, the lastColumn is not correct if you select column
>  which is before the previous selected column.
>  Second, print out all the selected cell in each column
>  is also incorrect. It will cached previous selected browserCell.
>
>  Hope this help
>
>  Yen-Ju
>
> > From: Adam Fedor <fedor@doc.com>
> > To: Yen-Ju Chen <yjchenx@hotmail.com>
> > Subject: Re: bug in NSBrowser ?
> > Date: Thu, 22 Aug 2002 08:22:03 -0600
> >
> > Yen-Ju Chen wrote:
> >
> > >  Two things I notice when using NSBrowser
> > >
> > >  1. The selected cell doesn't deselected properly:
> > >     Select a cell of 1st column, 2nd column will show up.
> > >     Then select a cell of 2nd column, 3rd column will show up.
> > >     Now select a cell of 1st column, the 3rd column will disapper,
> > >     and the cell in 2nd column is deselected.
> > >     Use a loop to search all selected cell from 1st column (index 0)
> > >     to last column ([NSBrowser lastColumn]),
> > >     it shows that the selected cell in 2nd column is not -1,
> > >     but the cell which is selected previous.
> > >     That conflicts with the fact that the 2nd column is now deselected.



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Adam Fedor, Digital Optics Corp.      | I'm glad I hate spinach, because
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