IBlazorSelectionChangeEventArgs notifies when the node/connector are select in Blazor
boolean
returns whether or not to cancel the selection change event
returns the actual cause of the event
returns the collection of nodes and connectors that have to be added to selection list
returns the collection of nodes and connectors that have to be removed from selection list
Triggers before and after adding the selection to the object
in the diagram which can be differentiated through state argument.
We can cancel the event only before the selection of the object
returns whether the item is added or removed from the selection list