On 28/10/2010, at 8:45 AM, Paul Johnson wrote:
> I think I've made some progress. I've rewritten
> tableView:writeRowsWithIndexes:toPasteboard: for the source table view:
>
> NSArray *rows = [self arrangedObjects];
> NSMutableArray *selectedItems = [NSMutableArray
> arrayWithCapacity:[rowIndexes count]];
> NSInteger index = [rowIndexes firstIndex];
>
> while (index != NSNotFound) {
> [selectedItems addObject:[rows objectAtIndex:index]];
> index = [rowIndexes indexGreaterThanIndex:index];
> }
Hi Paul,
You can replace all of the above with:
NSArray* selectedItems = [[self arrangedObjects] objectsAtIndexes:rowIndexes];
>
> [pboard declareTypes:[NSArray arrayWithObject:BFDragPasteboardType]
> owner:nil];
owner should be 'self', not nil.
> [pboard setPropertyList:selectedItems forType:BFDragPasteboardType];
This should be OK as long as you are certain that the data items conform to the
limitations on property lists. Otherwise you might want to archive the array to
a NSData object and write it to the pasteboard using -setData:forType:
> Where I'm still having problems is in the array controller for the second
> table. What I have so far doesn't work:
>
> - (BOOL)tableView:(NSTableView *)aTableView
> acceptDrop:(id <NSDraggingInfo>)info
> row:(NSInteger)row
> dropOperation:(NSTableViewDropOperation)operation {
> id current;
> NSPasteboard *pb = [info draggingPasteboard];
> NSEnumerator *enumerator;
> enumerator = [[pb propertyListForType:@"selectedItems"] objectEnumerator];
This should be:
NSArray* draggedItems = [pb propertyListForType:BFDragPasteboardType];
That's all - the object returned is an array containing a copy of the original
items (assuming that they are compatible with property lists, as above). If
not, you should use -dataForType: and dearchive the NSData to recover the array.
Is the method above actually being called? Don't forget you need to register
the tableview to receive drags of type 'BFDragPasteboardType' when you set up
your interface otherwise it won't even begin to handle any drags.
--Graham
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