StackOverflow2013

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PODynamic NSOutlineView data source
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copied!<p>So I have implemented a <code>PXSourceList</code> data source that pretty much is a duplicate of Apple's example of a <code>NSOutlineView</code> data source.</p> <p>This is how it goes...</p> <pre><code>- (NSUInteger)sourceList:(PXSourceList*)sourceList numberOfChildrenOfItem:(id)item; { if (item == nil) { // item is nil so it's part of the very top hierarchy. // return how many sections we need. return 2; } else { if ([item class] == [TSFileSystemItem class] ) { return [item numberOfChildren]; // if item isn't nil and it's a TSFileSystemItem, then return it's children. } if ([item class] == [TSWorkspaceItem class]) { return 2; // i don't know, random items. } else { NSLog(@"this is a special object."); } } } - (BOOL)sourceList:(PXSourceList *)aSourceList isItemExpandable:(id)item { if (item == nil) { return YES; } else { // if the number of children of the item is -1 BOOL gibberhook = ([item numberOfChildren] != -1); return gibberhook; } } -(id)sourceList:(PXSourceList *)aSourceList child:(NSUInteger)index ofItem:(id)item { if (item == nil) { return [TSFileSystemItem rootItem]; } else { return [(TSFileSystemItem *)item childAtIndex:index]; } } - (id)sourceList:(PXSourceList *)aSourceList objectValueForItem:(id)item { if (item == nil) { return @"/"; } else { if (item == [TSFileSystemItem rootItem]) { return PROJECT_FILES; } else { return [item relativePath]; } } } </code></pre> <p>The mysterious <code>TSFileSystemItem</code> is from here: <a href="https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/OutlineView/Articles/UsingOutlineDataSource.html" rel="noreferrer">https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/OutlineView/Articles/UsingOutlineDataSource.html</a>. </p> <p>All of this is OK, except I want to divide my source list to have multiple sections (root cells). One displaying a file hierarchy (check) and the other... </p> <p>Well the other is going to contain a <code>NSMutableArray</code> that I add items to from the other section. Sounds complicated? Better explanation. Click an item from section with file hierarchy, and it is added to the other section. </p> <p>I have tried to solve this mess with the help of Apple's docs, but I still can't find a simple, efficient, stable way of making 2 sections with the functions I mentioned above. If only it was as easy as configuring a data source for <code>UITableView</code>... </p> <p>Can anybody kindly help me out?</p>

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