Hi all, I have a simple problem, but I’m not able to solve it in an easy way, so I suspect I’m doing something wrong.
I have a simple view-based NSTableView, which is a dragging source. The data being dragged are provided to the pasteboard using the standard data source method - [NSObject tableView:writeRowsWithIndexes:toPasteboard:]. When rows of the table view are dragged, AppKit automatically creates a dragging image consisting of the visual copy for all dragged rows and all columns of the table view. If I want only particular columns, I can override -[NSTableView dragImageForRowsWithIndexes:tableColumns:event:offset:] and include only the columns I want in the dragged image. Since [NSObject tableView:writeRowsWithIndexes:toPasteboard:] is rendered deprecated as of macOS 11, I want to use the alternative (which also supports multiple item dragging) -[NSObject tableView:pasteboardWriterForRow:]. However, when I use this method, AppKit creates a dragging image consisting of the visual copy for all dragged rows, BUT ONLY the column where the drag started. Overriding -[NSTableView dragImageForRowsWithIndexes:tableColumns:event:offset:] has no effect, as in this case that method isn’t being called at all. So the question is, how do I influence the dragging image creation in the latter case? I haven’t found in docs anything related to that (except for the method mentioned above, but not being called in this case). Implementing data source method -[NSObject tableView:updateDraggingItemsForDrag:] doesn’t help, as it’s really intended to change the dragging image after the dragging has started and at the time it’s called for the first time, the AppKit created image is already there and visible. Thanks a lot for any solution, hint or a suggestion. -- Dragan _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
