tableView(_:shouldReorderColumn:toColumn:)
Asks the delegate to allow or prohibit the specified column to be dragged to a new location.
Declaration
@MainActor optional func tableView(_ tableView: NSTableView, shouldReorderColumn columnIndex: Int, toColumn newColumnIndex: Int) -> BoolParameters
- tableView:
The table view that sent the message.
- columnIndex:
The index of the column being dragged.
- newColumnIndex:
The proposed target index of the column.
Return Value
true if the column reordering should be allowed, otherwise false.
Discussion
When a column is initially dragged by the user, the delegate is first called with a newColumnIndex value of -1. Returning false will disallow that column from being reordered at all. Returning true allows it to be reordered, and the delegate will be called again when the column reaches a new location.
The actual NSTableColumn instance can be retrieved from the tableColumns array.
If this method isn’t implemented, all columns are considered reorderable.