[bug #25078] NSOutlineView Cocoa incompatibility

[Doug Simons]

URL:
  <http://savannah.gnu.org/bugs/?25078>

                 Summary: NSOutlineView Cocoa incompatibility
                 Project: GNUstep
            Submitted by: theeggcamefirst
            Submitted on: Fri 12 Dec 2008 09:18:36 PM GMT
                Category: Gui/AppKit
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

When loading its data, NSOutlineView was asking for the number of sub-items
within each item using outlineView:numberOfChildrenOfItem: -- including for
items that aren't expandable. Cocoa first inquires whether the item is
expandable using outlineView: isItemExpandable: .

To fix this, I changed the first line of NSOutlineView's method
_loadDictionaryStartingWith:atLevel:

from:
                num = [_dataSource outlineView: self
                         numberOfChildrenOfItem: startitem];

to:
        if ([_dataSource outlineView: self isItemExpandable: startitem])
                num = [_dataSource outlineView: self
                         numberOfChildrenOfItem: startitem];

That works for my application, making it compatible with Cocoa.




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