SchedulerControl.ResizeAppointmentOver Event

Raised repeatedly while the user resizes an appointment.

Namespace: DevExpress.Xpf.Scheduling

Assembly: DevExpress.Xpf.Scheduling.v21.2.dll

NuGet Package: DevExpress.Wpf.Scheduling

Declaration

C#

public event ResizeAppointmentOverEventHandler ResizeAppointmentOver

VB.NET

Public Event ResizeAppointmentOver As ResizeAppointmentOverEventHandler

Event Data

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

Property	Description
ConflictedAppointments	Returns the list of appointments that conflict with the resized appointment.
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.
ResizeAppointment	Returns the current state of the appointment the user is resizing.
ResizeHandle	Indicates whether the user drags the start or end of the appointment.
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.
SourceAppointment	Returns the initial state of the appointment the user is resizing.

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

Data properties of the event’s ResizeAppointment propery are copied to the event’s SourceAppointment property. Set the event’s Cancel property to true to disable this behavior and manually apply the desired changes to the SourceAppointment.

The example below illustrates how to assign a specific label to appointments that intersect another appointment.

C#

private void Scheduler_ResizeAppointmentOver(object sender, DevExpress.Xpf.Scheduling.ResizeAppointmentOverEventArgs e) {
    //if a resized appointment intersects another appointment, paint it red to indicate a conflict
    if (e.ConflictedAppointments.Count > 0)
        e.ResizeAppointment.LabelId = 1;
    //roll the label back if no conflicts are detected
    if (e.ConflictedAppointments.Count == 0)
        e.ResizeAppointment.LabelId = e.SourceAppointment.LabelId;
}

VB.NET

Private Sub Scheduler_ResizeAppointmentOver(ByVal sender As Object, ByVal e As DevExpress.Xpf.Scheduling.ResizeAppointmentOverEventArgs)
    'if a resized appointment intersects another appointment, paint it red to indicate a conflict
    If e.ConflictedAppointments.Count > 0 Then
        e.ResizeAppointment.LabelId = 1
    End If
    'roll the label back if no conflicts are detected
    If e.ConflictedAppointments.Count = 0 Then
        e.ResizeAppointment.LabelId = e.SourceAppointment.LabelId
    End If
End Sub