Re: some help with NSBrowser needed

[Fred Kiefer]

I think the problematic line is this one:

    browser = [[NSBrowser alloc] init];

You create a browser with a zero size frame. (The -init method of NSView 
calls -initWithFrame: with NSZeroRect) When the browser later tries to 
draw its various parts, some of these may end up with negative sizes. 
you could set a breakpoint on NSView.m:1182 to find out which parts are 
affected.

If your code works on Cocoa, but not on GNUstep, we might have to change 
the default rectangle for NSBrowser.

Hope this helps,
Fred


On 01.01.2013 18:17, Sebastian Reitenbach wrote:
> for MPDCon, i want to have a filesystem like browser to browse through the music
> directories. The Interface is created in Gorm, and in my class, I implemented 
> the
> "passive" NSBrowser delegate methods:
>
> - (NSInteger)browser:(NSBrowser *)sender numberOfRowsInColumn:(NSInteger)column;
> - (void)browser:(NSBrowser *)sender willDisplayCell:(id)cell 
> atRow:(NSInteger)row column:(NSInteger)column;
>
> My class is a subclass of NSWindowController, and is just a NSWindow, with
> a NSBrowser in it, and one IBOutlet NSBrowser *browser.
>
> I can see that both delegate methods get called from within awakeFromNib. There 
> at the end I have:
>
>    browser = [[NSBrowser alloc] init];
>    [browser setDelegate:self];
>    [browser setPath:@"/"];
> }
>
> the setPath: actually triggers calling the delegate methods. I have some NSLogs 
> in them, to see if
> they get called:
>
> 2013-01-01 17:56:10.400 MPDCon[2484] here in numberOfRowsInColumn 0
> 2013-01-01 17:56:10.400 MPDCon[2484] returning count: 5
> 2013-01-01 17:56:10.760 MPDCon[2484] here in willDisplayCell <NSBrowserCell: 
> 0x80c95704> 0 0, adding: /reggae
> 2013-01-01 17:56:11.031 MPDCon[2484] here in willDisplayCell <NSBrowserCell: 
> 0x80c95584> 1 0, adding: /techno
> 2013-01-01 17:56:11.287 MPDCon[2484] here in willDisplayCell <NSBrowserCell: 
> 0x80c95044> 2 0, adding: /ska
> 2013-01-01 17:56:11.539 MPDCon[2484] here in willDisplayCell <NSBrowserCell: 
> 0x80c955c4> 3 0, adding: /folk
> 2013-01-01 17:56:11.786 MPDCon[2484] here in willDisplayCell <NSBrowserCell: 
> 0x80c95144> 4 0, adding: /other
> 2013-01-01 17:56:11.787 MPDCon[2484] File NSView.m: 1182. In -[NSView 
> setFrame:] given negative width
>
> The delegate methods, as I have them for now, can be seen below.
> It's my first time dealing with NSBrowser, so I hope its just something easy 
> that I have overlooked while
> trying to figure out what's (not) going on.
> I also wonder about the last line of the output from NSView, what this could be 
> about?
> I'm on OpenBSD i386.
>
> cheers,
> Sebastian
>
>
> - (NSInteger)browser:(NSBrowser *)sender numberOfRowsInColumn:(NSInteger)column
> {
> NSLog(@"here in numberOfRowsInColumn %d", column);
>    NSInteger count, blubb=0;
>    NSEnumerator *dirEnum;
>    NSString *dir;
>    NSMutableArray *tmpArray = [NSMutableArray array];
>
>    dirEnum = [directories objectEnumerator];
>
>    while ((dir = [dirEnum nextObject]) != nil && blubb < 5)
>      {
>        if ([[dir pathComponents] count] >= column)
>          {
>            dir = [[dir pathComponents] objectAtIndex:column];
>            if (![tmpArray containsObject:dir])
>              {
>                [tmpArray addObject:dir];
>                blubb++;
>              }
>          }
>      }
>    count = [tmpArray count];
>    [tmpArray release];
> NSLog(@"returning count: %d", count);
>    return count;
> }
>
> - (void)browser:(NSBrowser *)sender willDisplayCell:(id)cell 
> atRow:(NSInteger)row column:(NSInteger)column
> {
>    NSEnumerator *dirEnum;
>    NSString *dir;
>    NSMutableArray *tmpArray = [NSMutableArray array];
>
>    dirEnum = [directories objectEnumerator];
>
>    while ((dir = [dirEnum nextObject]) != nil)
>      {
>        if ([[dir pathComponents] count] >= column)
>          {
>            dir = [[dir pathComponents] objectAtIndex:column];
>            if (![tmpArray containsObject:dir])
>              {
>                //[tmpArray addObject:dir];
>                [tmpArray addObject:[NSString stringWithFormat:@"/%@", dir]];
>              }
>          }
>      }
> NSLog(@"here in willDisplayCell %@ %d %d, adding: %@", cell, row, column, 
> [tmpArray objectAtIndex:row]);
>    [cell setStringValue:[tmpArray objectAtIndex:row]];
>    [cell setTitle:[tmpArray objectAtIndex:row]];
>    [cell setLoaded: YES];
> }