Cancel Appointment Dragging

[Sean Overman]

How can I cancel the appointment dragging once its started?  For example by pressing the escape key.

[Ivan Todorov]

Hi Sean Overman,

Thank you for your question.

Here is how this could be achieved:

//...
this.radScheduler1.KeyDown += new KeyEventHandler(radScheduler1_KeyDown);

this.radScheduler1.SchedulerElement.DragDropBehavior.AppointmentDropping += new EventHandler<AppointmentMovingEventArgs>(DragDropBehavior_AppointmentDropping);
//...
private bool shouldCancelDrop = false;

void DragDropBehavior_AppointmentDropping(object sender, AppointmentMovingEventArgs e)
{
    e.Cancel = this.shouldCancelDrop;
}

void radScheduler1_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Escape)
    {
        this.shouldCancelDrop = true;
        SchedulerVisualElement parent = this.radScheduler1.SchedulerElement.DragDropBehavior.ActiveFeedback.Parent as SchedulerVisualElement;

        this.radScheduler1.SchedulerElement.DragDropBehavior.Drop();
        foreach (AppointmentElement element in SchedulerUIHelper.GetAppointmentElements(this.radScheduler1))
        {
            element.Capture = false;
        }

        this.radScheduler1.SchedulerElement.DragDropBehavior.RemoveFeedback(parent);
        this.shouldCancelDrop = false;
    }
}

I hope this is helpful. Feel free to ask if you have any additional questions.

Greetings,
Ivan Todorov
the Telerik team

[Sean Overman]

Thank you for the code example, how this fails to function correctly when using grouping by resource:  GroupType.Resource

You can see the problem by adding this bit of code to your example (form_load):

Telerik.WinControls.UI.Resource res = new Telerik.WinControls.UI.Resource();
res.Id = new EventId(1);
res.Name = "test emp";
radScheduler1.Resources.Add(res);

radScheduler1.GroupType = GroupType.Resource;

[Ivan Todorov]

Hi Sean Overman,

The dragging logic is a bit different when you are using grouping by resource since the appointments can be dragged between different view elements. I have tried to modify the code to work when grouping is enabled, however the public API of RadScheduler does not allow it. This scenario makes sense and we will consider improving our API in when planning our future releases.

If you have any additional questions, do not hesitate to ask.

Best wishes,
Ivan Todorov
the Telerik team