GanttView.QueryAllowPredecessorLinkEdit Event

Occurs when an end user moves the mouse over a connector (on MouseEnter) and allows you to display available interactive editing actions. This is a routed event.

Namespace: DevExpress.Xpf.Gantt

Assembly: DevExpress.Xpf.Gantt.v25.1.dll

NuGet Package: DevExpress.Wpf.Gantt

Declaration

C#

public event EventHandler<QueryAllowPredecessorLinkEditEventArgs> QueryAllowPredecessorLinkEdit

VB.NET

Public Event QueryAllowPredecessorLinkEdit As EventHandler(Of QueryAllowPredecessorLinkEditEventArgs)

Event Data

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

Property	Description
AllowDelete	Gets or sets whether an end user can delete the processed connector (predecessor link).
AllowEdit	Gets or sets whether an end user can edit the processed connector (predecessor link).
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.
LinkType	Gets the connector’s link type.
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 processed connector’s predecessor.
PredecessorLink	Gets the processed connector’s bound data object.
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.
Successor	Gets the processed connector’s successor.

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.