| Maintainer | gtk2hs-users@lists.sourceforge.net |
|---|---|
| Stability | provisional |
| Portability | portable (depends on GHC) |
| Safe Haskell | None |
| Language | Haskell98 |
Graphics.UI.Gtk.ModelView.TreeRowReference
Contents
Description
A persistent index into a tree model.
- data TreeRowReference
- treeRowReferenceNew :: TreeModelClass self => self -> TreePath -> IO (Maybe TreeRowReference)
- treeRowReferenceGetPath :: TreeRowReference -> IO TreePath
- treeRowReferenceValid :: TreeRowReference -> IO Bool
Detail
A RowReference is an index into a
TreeModel that is persistent even if
rows are inserted, deleted or reordered.
Types
data TreeRowReference Source
Tree Row Reference : like a TreePath it points to a subtree or node, but
it is persistent. It identifies the same node (so long as it exists) even
when items are added, removed, or reordered.
Constructors
treeRowReferenceNew :: TreeModelClass self => self -> TreePath -> IO (Maybe TreeRowReference) Source
Creates a row reference based on a path. This reference will keep pointing
to the node pointed to by the given path, so long as it exists. Returns Nothing if there is no node at the given path.
Methods
treeRowReferenceGetPath :: TreeRowReference -> IO TreePath Source
Returns a path that the row reference currently points to.
- The returned path may be the empty list if the reference was invalid.
treeRowReferenceValid :: TreeRowReference -> IO Bool Source
Returns True if the reference refers to a current valid path.