Portability | portable (depends on GHC) |
---|---|
Stability | provisional |
Maintainer | gtk2hs-users@lists.sourceforge.net |
Interfaces for drag-and-drop support in Graphics.UI.Gtk.ModelView.TreeView
.
- treeModelEqual :: (TreeModelClass tm1, TreeModelClass tm2) => tm1 -> tm2 -> Bool
- targetTreeModelRow :: TargetTag
- treeGetRowDragData :: SelectionDataM (Maybe (TreeModel, TreePath))
- treeSetRowDragData :: TreeModelClass treeModel => treeModel -> TreePath -> SelectionDataM Bool
Detail
Graphics.UI.Gtk.ModelView.TreeView
s provide special support for
Drag-and-Drop such as hover-to-open-rows or autoscrolling. This module
implements two utility functions that set and get a path and a model in a
Graphics.UI.Gtk.General.Selection.Selection
structure. These functions
are thus useful to implement drag-and-drop functionality in a
Graphics.UI.Gtk.ModelView.TreeModel
. In fact, they are used as part of
the default drag-and-drop interfaces of
Graphics.UI.Gtk.ModelView.ListStore
and
Graphics.UI.Gtk.ModelView.TreeStore
that allows to permute rows and move
them between hierarchy levels.
DND information for exchanging a model and a path.
treeModelEqual :: (TreeModelClass tm1, TreeModelClass tm2) => tm1 -> tm2 -> BoolSource
targetTreeModelRow :: TargetTagSource
The SelectionTag
, TargetTag
and SelectionTypeTag
of the DND
mechanism of Graphics.UI.Gtk.ModelView.ListStore
and
Graphics.UI.Gtk.ModelView.TreeStore
. This tag is used by
treeGetRowDragData
and treeSetRowDragData
to store a store and a
TreePath
in a SelectionDataM
. This target should be added to a
Graphics.UI.Gtk.General.Selection.TargetList
using
Graphics.UI.Gtk.General.Seleciton.TargetSameWidget
flag and an
Graphics.UI.Gtk.General.Selection.InfoId
of 0
.
treeGetRowDragData :: SelectionDataM (Maybe (TreeModel, TreePath))Source
Obtains a TreeModel
and a path from SelectionDataM
whenever the target is
targetTreeModelRow
. Normally called from a treeDragDestDragDataReceived
handler.
treeSetRowDragData :: TreeModelClass treeModel => treeModel -> TreePath -> SelectionDataM BoolSource
Sets selection data with the target targetTreeModelRow
, consisting
of a TreeModel
and a TreePath
. Normally used in a
treeDragSourceDragDataGet
handler.
- Returns
True
if setting the data was successful.