DiagramControl.CustomItemDrag Event
Occurs when an end-user starts dragging a diagram item.
Namespace: DevExpress.Xpf.Diagram
Assembly: DevExpress.Xpf.Diagram.v24.1.dll
NuGet Package: DevExpress.Wpf.Diagram
Declaration
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