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Description | ||||||||
Interfaces for drag-and-drop support in TreeView. | ||||||||
Synopsis | ||||||||
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Detail | ||||||||
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 Selection structure. These functions are thus useful to implement drag-and-drop functionality in a TreeModel. In fact, they are used as part of the default drag-and-drop interfaces of ListStore and 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 | ||||||||
Compare two tree model for equality. | ||||||||
targetTreeModelRow :: TargetTag | ||||||||
The SelectionTag, TargetTag and SelectionTypeTag of the DND mechanism of ListStore and 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 TargetList using TargetSameWidget flag and an 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.
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Produced by Haddock version 0.8 |