Select appointments spanning past VisibleRange

[Brandon]

I am using a RadScheduleView (version 2018.1.116) with the MonthViewDefinition.  My users want to be able to select multiple appointments spanning across several months. It appears the RadScheduleView only allows selecting appointments within the current VisibleRange.  For instance, if I select a set of appointments in the current month (such as Feb 8-Feb 10), then navigate to another month and hold Ctrl or Shift while selecting another appointment (such as Jan 5), the previously selected appointments are lost, and only the appointment in the visible month remains selected (i.e. only Jan 5 is selected, Feb 8-Feb 10 are no longer selected).

 

I can select my full appointment range via code-behind (spanning multiple months), but is there a way I can enable this behavior for my users?  I assume this would involve a custom AppointmentSelectionBehavior, but looking at the source code it appears the AppointmentSelectionHelper (an internal class) is what's limiting my selection to the VisibleRange.

[Stefan]

Hello Brandon,

Thanks for the detailed description of the behavior you are observing.

I tested the selection of the control and was not able to replicate such malfunction. Attached to my reply you can find the Setting SelectedAppointments SDK Example which I used for testing. Can you please take a look at it? Am I missing something?

Regards,
Stefan
Progress Telerik

[Brandon]

Stefan,

The problem occurs when I have appointments in different months, and I want to select appointments in both months.  The example you provided only shows appointments within the same month.

 

I was able to reproduce the problem by modifying the ViewModel.GetAppointments() method in your example to add 2 more  appointments:

appointmentList.Add(new Appointment { Subject = "App 7", Start = DateTime.Now.AddDays(40), End = DateTime.Now.AddDays(40).AddHours(1) });
appointmentList.Add(new Appointment { Subject = "App 8", Start = DateTime.Now.AddDays(42), End = DateTime.Now.AddDays(42).AddHours(1) });

 

This makes sure I have 2 appointments that appear in the next month.  To reproduce the problem:

1. Switch to the Month view.

2. Using Ctrl+Click or Shift+Click, select App 4, App 5, and App 6 (all in the current month).

3. Navigate to the next month.

4. Using Ctrl+Click or Shift+Click, select App 7.  This should add App 7 to the list of selected appointments.

5. Navigate back to the current month.  Notice that App 4, App 5, and App 6 are no longer selected (they should have remained selected since App 7 was selected using Shift+Click.

Please let me know if you need any additional information.

 

Thanks,

Brandon

[Stefan]

Hello Brandon,

Thank you for this clarification.

Indeed, when the selected appointments are lost with such an approach. Please, excuse me for the misunderstanding for the previous post.

The behavior you are experiencing is the by-design one. It can be reproduced with each ViewDefinition. The reason behind this implementation is that Outlook does not persist its selection as well. Our RadScheduleView component is inspired by it, thus the same selection behavior is reproduced with it. Even with a custom AppointmentSelectionBehavior such customization could hardly be satisfied with a clean solution.

Regards,
Stefan
Progress Telerik

[Brandon]

Stefan,

The desired behavior I described is a requirement from my client.  Is there any way I can implement this using the RadScheduleView?

I downloaded the source code when I was troubleshooting this, and it looks like the issue is in AppointmentSelectionHelper.PrepareState():

CurrentSelectedAppointments = new List<IOccurrence>(this.SelectedAppointments.Where(this.IsInVisibleRange)),

 

Is there a way I can override this class or method so that

CurrentSelectedAppointments = new List<IOccurrence>(this.SelectedAppointments),

 

Thanks,

Brandon

[Stefan]

Hi Brandon,

The logic to which you refer is internal, as you may have noticed, and cannot be exposed for external modifications. As RadScheduleView exposes its SelectedAppointments collection I am currently researching whether it can be used in conjunction with a custom AppointmentSelectionBehavior so that this requirement can be met. I will update you with my findings shortly.

Regards,
Stefan
Progress Telerik

[Stefan]

Hello Brandon,

Firstly, I would like to thank you for your patience.

I researched whether such selection behavior can be achieved, but it seems that the control is not designed to be able to select appointments that are not in the current view. Despite that all selected appointments are returned by the custom AppointmentSelectionBehavior the selection does not reflect in the UI. So, I have logged this as a feature request in our system. You can track the state of the relevant item in the Feedback Portal: Support keeping the multiple selection of appointments that are not visible.

Let me know in case I can be of further assistance.

Regards,
Stefan
Progress Telerik

[Brandon]

For now, I guess I will need to keep track of the selections myself and manually synchronize the SelectedAppointments collection based on the existing selections, the current VisibileRange, and the modifier keys pressed.

 

Thanks for the update, I look forward to when this feature is available.