DiagramControl.QueryItemDrawAction Event

Fires repeatedly as the end-user hovers over the diagram canvas while a drawing tool (Rectangle, Ellipse, Right Triangle or Hexagon) is selected.

Namespace: DevExpress.Xpf.Diagram

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

Declaration

public event EventHandler<DiagramQueryItemDrawActionEventArgs> QueryItemDrawAction

Event Data

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

Property Description
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:

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

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.

See Also