UnifiedSelectionTreeEventHandler Class

Tree event handler that handles unified selection. Extends wrapped tree event handler's functionality by adding, removing or replacing nodes in unified selection. It also reacts to unified selection changes and selects/deselects tree nodes according changes.

Note: conditions used to determine if node is selected and nodes that should be added to unified selection can be controlled by overriding 'shouldSelectNode' and 'createKeysForSelection' methods.

Extends

Implements

Methods

Name Description
constructor(params: UnifiedSelectionTreeEventHandlerParams): UnifiedSelectionTreeEventHandler    
createKeysForSelection(nodes: TreeNodeItem[], _selectionType: SelectionChangeType): Keys Protected Returns node keys that should be added, removed or used to replace unified selection.  
dispose(): void    
getKeys(nodes: TreeNodeItem[]): Keys Protected    
getNodeKey(node: TreeNodeItem): NodeKey Protected    
onSelectionModified(__namedParameters: TreeSelectionModificationEventArgs): undefined | Subscription    
onSelectionReplaced(__namedParameters: TreeSelectionReplacementEventArgs): undefined | Subscription    
selectNodes(modelChange?: TreeModelChanges): void    
shouldSelectNode(node: TreeNodeItem, selection: Readonly<KeySet>): boolean Protected Determines if node should be selected.  

Inherited methods

Name Inherited from Description
onCheckboxStateChanged(__namedParameters: TreeCheckboxStateChangeEventArgs): undefined | Subscription TreeEventHandler Changes nodes checkbox states.
onDelayedNodeClick(__namedParameters: TreeNodeEventArgs): void TreeEventHandler Activates node editing if editing parameters are supplied and node is editable.
onNodeCollapsed(__namedParameters: TreeNodeEventArgs): void TreeEventHandler Collapses node
onNodeEditorActivated(__namedParameters: TreeNodeEventArgs): void TreeEventHandler Activates node editing if editing parameters are supplied and node is editable.
onNodeExpanded(__namedParameters: TreeNodeEventArgs): void TreeEventHandler Expands node and starts loading children.

Properties

Name Type Description
modelSource Accessor ReadOnly TreeModelSource    

Defined in

Last Updated: 20 June, 2023