Re: GORM and NSCollectionView

[Alessandro Sangiuliano]

Il 05/03/2015 22:58, Fred Kiefer ha scritto:
> I used gdb to get the full stack trace form Gorm. The problem happens
> when line 161 in NSCollectionView.m tries to get the item 0 while there
> isn't any item in the subview list.
>
> The issue that causes this strange behaviour seem to be the MIN macro.
> I added the following line before the loop:
>
>    NSLog(@"first %d last %d %d %d %d", firstIndexInRect, lastIndexInRect,
> [_items count] - 1, [self _indexAtPoint: oppositeOrigin], MIN(-1, 12));
>
> This prints:
>
> 2015-03-05 22:40:31.307 Gorm[2624:2624] first 0 last 12 -1 12 -1
>
> lastIndexInRect is 12 while it should be -1, but doing the same MIN call
> with constants gives the correct result. When I extract the count to a
> variable first and use that it also works. This definitely seems to be
> compiler magic, most likely it gets the type of the count method as
> NSUInteger and uses [_items count] - 1 also as unsigned.
>
> I fixed this and hope that your application now works on GNUstep.
>
> Fred
>
>
>
> Am 03.03.2015 um 13:30 schrieb Alessandro Sangiuliano:
> > Hello, some days ago I wrote a little App to practice with
> > NSCollectionView.
> > I wrote it on OS X 10.6.8 XCode 3.2.2 and the relative IB; I ported the
> > App on GNUstep and when I try to open the nib or the xib file with GORM,
> > it is saying that:
> >
> > "Problem Loading
> > Failed to load file. Exception: Index 0 is out of range 0 (in
> > 'objectAtIndex:')
> > "
> >
> > Last GORM update from the svn: Today.
> >
> > I need this little App on GNUstep because I'll switch my little Calendar
> > App to NSCollectionView as soon as I can and I'd like to have it on
> > GNUstep, because I need specifically on GNUstep.
> >
> > However, if I try to run the App without modify the nib file, it runs, but:
> >
> > 1) If I try to resize the window, it becomes totally black and the App
> > is not usable.
> > 2) If i click on the button "Add Student", it adds nothing. (It should
> > add a view)
> >
> > To implement the GUI, I used IB facilities for Cocoa bindings.
> >
> > On OS X (10.6.8 and 10.10 too) the App behaves as expected.
> >
> > The code is on github if you want to give a look. It's possible to try
> > it with XCode (3.2.2, and probably it also works for XCode 6 because I
> > have the same implementation on 10.10 and I did not remember differences
> > on the implementation) or with GNUstep.
> >
> > https://github.com/AlessandroSangiuliano/NSCollectionView.git
> >
> > Best regards,
> > Alex.
>
>
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First thing, thanks for the fix;
now I split the problem in 2 pieces, what fixed and and works, what 
still doesn't work.

What the fix, fixed:

1) I can open the nib file with GORM regurarly now, so it works.
2) If I run the CollectionViewApp targetin the nib file in the 
GNUmakefile, now I can resize regurarly w/o getting the window to become 
black and not usable. So it works

What still doesnt work (On all this passages I don't modify the internal 
nib elements like views and buttons):

1) If I open the nib file with GORM and then I save it as .gorm file, 
w/o any modification, when I try to open the .gorm file with GORM what I 
get is:

"Problem Loading.
Failed to load file.  Exception: Range: (28496, 1) Size: 28496"

Does GORM know about bindings?

2) If I target the .gorm file in the GNUmake file (and I do al the 
necessary configurations to get the .gorm loaded at startup) what I get is:

"Is not possible to load the main model file "MainMenu" (the translation 
could be not precise)

3) If I target the nib file in the GNUmake file, what I get running the 
app is:

"2015-03-06 10:09:16.487 CollectionView[7953] 
[NSConstantString-stringByAppendingPathExtension:] cannot append 
extension 'gorm' to empty string

2015-03-06 10:09:16.487 CollectionView[7953] 
[NSConstantString-stringByAppendingPathExtension:] cannot append 
extension 'gmodel' to empty string

2015-03-06 10:09:16.487 CollectionView[7953] 
[NSConstantString-stringByAppendingPathExtension:] cannot append 
extension 'nib' to empty string

2015-03-06 10:09:16.487 CollectionView[7953] 
[NSConstantString-stringByAppendingPathExtension:] cannot append 
extension 'xib' to empty string

2015-03-06 10:09:16.536 CollectionView[7953] No binding exposed on h=-&- 
v=-&- <NSCollectionView: 0x1a22e00> f={x = 0; y = 0; width = 474; height 
= 300} b={x = 0; y = 0; width = 474; height = 300} for content"

Ignoring the "[NSConstantString-stringByAppendingPathExtension:]" output 
, the interesting one is :

"2015-03-06 10:09:16.536 CollectionView[7953] No binding exposed on 
h=-&- v=-&- <NSCollectionView: 0x1a22e00> f={x = 0; y = 0; width = 474; 
height = 300} b={x = 0; y = 0; width = 474; height = 300} for content"

4) While the App is running clicking on the Add Student Button, nothing 
happens, it should add an item view to the NSCollectionView, I think 
this is a consequence og the third point.

Thank You again,

Best Regards,
Alex