Class DiagramCollectionChangedEventArgs
Provides data for CollectionChanged: a Node or Connector was just added to, or removed from, the diagram — one unified event for both Nodes and Connectors, regardless of what caused the change.
Inheritance
Namespace: Syncfusion.Maui.Diagram
Assembly: Syncfusion.Maui.Diagram.dll
Syntax
public sealed class DiagramCollectionChangedEventArgs : EventArgsRemarks
"Regardless of what caused the change" is the reason this exists as its own event rather than asking application code to subscribe to Nodes/Connectors's own System.Collections.Specialized.INotifyCollectionChanged.CollectionChanged separately (which would still work, but only covers additions/removals application code itself made): this also fires for a node dragged in from a sibling SymbolPalette, an interactively-drawn connector, a delete/cut in the WebView, or an undo/redo of any of those — every one of which ends up going through the same Nodes/Connectors collections either way (see Syncfusion.Maui.Diagram.DiagramManager's remarks on the JavaScript-to-native structural sync), so a single subscription here sees all of it.
Properties
Action
Gets whether this is an addition or a removal. System.Collections.Specialized.NotifyCollectionChangedAction.Reset
means Nodes or Connectors was cleared in bulk (e.g.
Nodes.Clear()) — Node/Connector are both null in
that one case, since nothing reports which items a bulk clear removed. Every other value refers to
exactly one Node or Connector via the properties below.
Declaration
public NotifyCollectionChangedAction Action { get; }Property Value
| Type |
|---|
| System.Collections.Specialized.NotifyCollectionChangedAction |
Connector
Gets the connector that was added or removed, or null if this change was about a node (or a bulk clear).
Declaration
public Connector Connector { get; }Property Value
| Type |
|---|
| Connector |
Node
Gets the node that was added or removed, or null if this change was about a connector (or a bulk clear).
Declaration
public Node Node { get; }Property Value
| Type |
|---|
| Node |