DiagramControl.CustomItemDrag Event

Occurs when an end-user starts dragging a diagram item.

Namespace: DevExpress.Xpf.Diagram

Assembly: DevExpress.Xpf.Diagram.v21.1.dll

Declaration

public event EventHandler<DiagramCustomItemDragEventArgs> CustomItemDrag

Event Data

The CustomItemDrag event's data class is DiagramCustomItemDragEventArgs. The following properties provide information specific to this event:

Property Description
Data Provides data about the diagram items the end-user is dragging.
Handled Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route. Inherited from RoutedEventArgs.
Items Returns the list of items that are objects of the drag-and-drop operation.
OriginalSource Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs.
Result Returns the drag-and-drop operation result.
RoutedEvent Gets or sets the RoutedEvent associated with this RoutedEventArgs instance. Inherited from RoutedEventArgs.
Source Gets or sets a reference to the object that raised the event. Inherited from RoutedEventArgs.
SourceItem Returns the item the end-user is dragging.
SourceItemPoint Returns the point on the canvas where the end-user initiated the drag-and-drop operation.

The event data class exposes the following methods:

Method Description
InvokeEventHandler(Delegate, Object) When overridden in a derived class, provides a way to invoke event handlers in a type-specific way, which can increase efficiency over the base implementation. Inherited from RoutedEventArgs.
OnSetSource(Object) When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes. Inherited from RoutedEventArgs.

Remarks

Handle the CustomItemDrag event to customize drag and drop for diagram items.

In the event handler, call the DragDrop.DoDragDrop method and assign the Data event parameter to the method’s data parameter.

See Also