| Portability | portable (depends on GHC) |
|---|---|
| Stability | provisional |
| Maintainer | gtk2hs-users@lists.sourceforge.net |
Graphics.UI.Gtk.ModelView.TreeDrag
Description
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.TreeViews 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 -> Bool
targetTreeModelRow :: TargetTag
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))
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 Bool
Sets selection data with the target targetTreeModelRow, consisting
of a TreeModel and a TreePath. Normally used in a
treeDragSourceDragDataGet handler.
- Returns
Trueif setting the data was successful.