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GanttView.QueryAllowPredecessorEdit Event

Occurs when an end user edits a task's successor and moves a connector over a new successor and allows you to display available interactive editing actions. This is a routed event.

Namespace: DevExpress.Xpf.Gantt

Assembly: DevExpress.Xpf.Gantt.v20.1.dll

Declaration

public event EventHandler<QueryAllowPredecessorEditEventArgs> QueryAllowPredecessorEdit
Public Event QueryAllowPredecessorEdit As EventHandler(Of QueryAllowPredecessorEditEventArgs)

Event Data

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

Property Description
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.
Node Gets the currently processed task.
OriginalSource Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs.
Predecessor Gets the currently processed task's predecessor.
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.
VisibleConnectorThumbKind Gets or sets a value that identifies which of the connector thumbs are visible for an end user.

Remarks

When an end user drags a connector over a Gantt task's node, the GanttControl displays the successor task thumbs that allow end users to understand which interactive actions are available.

The QueryAllowPredecessorEdit event is raised each time an end user moves a connector to a new potential successor.

The Interactive Editing topic describes the availability of interactive editing actions. Use the QueryAllowPredecessorEdit event to control the availability of interactive editing actions for each task individually.

See Also