Fires repeatedly as the end-user triggers snapping while dragging or resizing a diagram shape.
NuGet Package: DevExpress.Wpf.Diagram
public event EventHandler<DiagramQueryItemSnappingEventArgs> QueryItemSnapping
Public Event QueryItemSnapping As EventHandler(Of DiagramQueryItemSnappingEventArgs)
The QueryItemSnapping event's data class is DiagramQueryItemSnappingEventArgs. The following properties provide information specific to this event:
|Allow||Specifies whether to allow snapping of diagram items.|
|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.|
|Item||Returns the item that is being dragged by the end-user.|
|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.|
|SnapTo||Returns the diagram item to which the item being dragged by the end-user can be snapped.|
|Source||Gets or sets a reference to the object that raised the event. Inherited from RoutedEventArgs.|
The event data class exposes the following methods:
|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.|
The SnapTo event’s parameter returns the item suitable for snapping (nearest in height/width when the end-user resizes an item or one lying on the same line when the end-user drags an item). The item that is being moved or resized is returned by the Item parameter. The Allow parameter specifies whether to enable snapping to the suitable item.