DiagramControl.CustomItemGiveFeedback Event

Occurs while diagram items are dragged.

Namespace: DevExpress.Xpf.Diagram

Assembly: DevExpress.Xpf.Diagram.v21.2.dll

NuGet Package: DevExpress.Wpf.Diagram

Declaration

C#

public event EventHandler<DiagramCustomItemGiveFeedbackEventArgs> CustomItemGiveFeedback

VB.NET

Public Event CustomItemGiveFeedback As EventHandler(Of DiagramCustomItemGiveFeedbackEventArgs)

Event Data

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

Property	Description
Cursor	Gets or sets the cursor type used during the drag-and-drop operation.
Effects	Gets a value that indicates the effects of the drag-and-drop operation.
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.
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.

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 CustomItemGiveFeedback event to modify the appearance of the mouse pointer during the drag operation. See the example below.

C#

void diagram_CustomItemGiveFeedback(object sender, DiagramCustomItemGiveFeedbackEventArgs e)
{
    e.Cursor = DragDropCursor.Custom;
    Mouse.SetCursor(Cursors.No);
}

VB.NET

Private Sub diagram_CustomItemGiveFeedback(ByVal sender As Object, ByVal e As DiagramCustomItemGiveFeedbackEventArgs)
    e.Cursor = DragDropCursor.Custom
    Mouse.SetCursor(Cursors.No)
End Sub