Fires repeatedly as the end-user hovers over the diagram canvas while a drawing tool (Rectangle, Ellipse, Right Triangle or Hexagon) is selected.
public event EventHandler<DiagramQueryItemDrawActionEventArgs> QueryItemDrawAction
Public Event QueryItemDrawAction As EventHandler(Of DiagramQueryItemDrawActionEventArgs)
The QueryItemDrawAction event's data class is DiagramQueryItemDrawActionEventArgs. The following properties provide information specific to this event:
|Allow||Specifies whether the end-user can use the selected drawing tool.|
|DiagramPoint||Returns the mouse pointer position within the diagram control.|
|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.|
|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.|
|Tool||Returns the drawing tool that the end-user is attempting to use.|
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 Allow property specifies whether the end-user can use the selected drawing tool. The Tool property returns the drawing tool that the end-user is attempting to use.