FIX. RadScheduler - AppointmentDeleted is fired even though the user cancelled the deletion (pressed Cancel on the dialog)

It would be nice if the RadScheduler allows dragging of multiple selected appointments and change the events'  start time in correspondence with the active appointment offset time.

To reproduce:
this.radScheduler1.RightToLeft = System.Windows.Forms.RightToLeft.Yes;
this.radScheduler1.Appointments.Add(new Appointment(DateTime.Now, TimeSpan.FromHours(2), "آقای حقیقت"));

Please refer to the attached screenshot.

Workaround:

private void radScheduler1_AppointmentFormatting(object sender, SchedulerAppointmentEventArgs e)
{ 
    e.AppointmentElement.UseHtml = false; 
}

Workaround:

Sub New()

    InitializeComponent()
     
    Me.RadScheduler1.ActiveViewType = UI.SchedulerViewType.Week
    AddHandler Me.RadSchedulerNavigator1.SchedulerNavigatorElement.ShowWeekendCheckBox.ToggleStateChanged, AddressOf ToggleStateChanged
End Sub

Private Sub ToggleStateChanged(sender As Object, args As UI.StateChangedEventArgs) 
    Me.RadScheduler1.SchedulerElement.RefreshViewElement()
End Sub

Currently, the control lacks such support and when this culture is used an exception is thrown. To reproduce use the sample project and press the navigator's Next button several times.

StackTrace:

System.ArgumentOutOfRangeException occurred

  HResult=-2146233086
  Message=Year, Month, and Day parameters describe an un-representable DateTime.
  Source=mscorlib
  StackTrace:
       at System.DateTime.DateToTicks(Int32 year, Int32 month, Int32 day)
       at Telerik.WinControls.UI.DateHelper.GetEndOfMonth(DateTime date, DateTimeFormatInfo dateTimeFormat)
       at Telerik.WinControls.UI.DateHelper.GetMonthDisplayWeeks(DateTime date, DateTimeFormatInfo dateTimeFormat)
       at Telerik.WinControls.UI.SchedulerNavigatorElement.NavigateBackwards()
       at Telerik.WinControls.UI.SchedulerNavigatorElement.OnNavigateBackwards(Object sender, EventArgs e)
       at Telerik.WinControls.UI.SchedulerNavigatorElement.NavigateButton_Click(Object sender, EventArgs e)
       at System.EventHandler.Invoke(Object sender, EventArgs e)
       at Telerik.WinControls.RadElement.OnClick(EventArgs e)
       at Telerik.WinControls.UI.RadButtonItem.OnClick(EventArgs e)
       at Telerik.WinControls.UI.RadButtonElement.OnClick(EventArgs e)
       at Telerik.WinControls.RadElement.DoClick(EventArgs e)
       at Telerik.WinControls.RadElement.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)
       at Telerik.WinControls.RadItem.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)
       at Telerik.WinControls.RadElement.RaiseRoutedEvent(RadElement sender, RoutedEventArgs args)
       at Telerik.WinControls.RadElement.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)
       at Telerik.WinControls.RadItem.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)
       at Telerik.WinControls.RadElement.RaiseRoutedEvent(RadElement sender, RoutedEventArgs args)
       at Telerik.WinControls.RadElement.DoMouseUp(MouseEventArgs e)
       at Telerik.WinControls.ComponentInputBehavior.OnMouseUp(MouseEventArgs e)
       at Telerik.WinControls.RadControl.OnMouseUp(MouseEventArgs e)
       at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
       at System.Windows.Forms.Control.WndProc(Message& m)
       at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
       at Telerik.WinControls.RadControl.WndProc(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
       at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
       at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
       at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.Run(Form mainForm)
       at SchedulerShamsiTest.Program.Main() in c:\Users\dyordano\Desktop\RadSchedulerFixPersianLocale (1)\SchedulerShamsiTest\Program.cs:line 19
  InnerException: 

Please refer to the attached gif file and sample project.

Workaround: remove the database restrictions and validate the data in the edit dialog before submitting the new appointment data.

Please refer to the attached screenshot from Outlook.

How to reproduce: check the attached (video radscheduler-selection-incorrect.gif)
 public RadForm1()
 {
     InitializeComponent();

     Appointment appointment = new Appointment(DateTime.Today.AddHours(13), TimeSpan.FromHours(1), "Test Appointment");
     this.radScheduler1.Appointments.Add(appointment);

     for (int i = 0; i < 25; i++)
     {
         appointment = new Appointment(DateTime.Today.AddHours(24), TimeSpan.FromHours(1), "AllDay: " + i);
         appointment.AllDay = true;
         this.radScheduler1.Appointments.Add(appointment);
     }
     this.radScheduler1.AllowAppointmentsMultiSelect = true;
 }

Workaround: create a custom input behavior

this.radScheduler1.SchedulerInputBehavior = new CustomSchedulerInputBehavior(this.radScheduler1);

public class CustomSchedulerInputBehavior : SchedulerInputBehavior
{
    public CustomSchedulerInputBehavior(RadScheduler scheduler) 
        : base(scheduler)
    {
    }

    public override bool HandleMouseWheel(MouseEventArgs args)
    {
        if (!this.Scheduler.AllowMouseWheelSupport)
            return false;

        bool scrolled = false;

        if (this.Scheduler.SelectionBehavior.IsAllDayAreaSelection || this.IsLastSelectedAppointmentAllDay(this.Scheduler.SelectionBehavior.SelectedAppointments))
        {
            if (this.Scheduler.GroupType == GroupType.Resource)
            {
                SchedulerDayViewGroupedByResourceElement grouped = this.Scheduler.ViewElement as SchedulerDayViewGroupedByResourceElement;
                IList<SchedulerDayViewElement> childViews = grouped != null ? grouped.GetChildViewElements() : null;
                if (childViews != null && childViews.Count > 0)
                {
                    RadScrollBarElement scroll = childViews[childViews.Count - 1].AllDayHeaderElement.ScrollBar;
                    if (scroll.Visibility != ElementVisibility.Collapsed)
                    {
                        int newValue = scroll.Value - childViews[childViews.Count - 1].AllDayHeaderElement.HeaderHeight * Math.Sign(args.Delta);
                        newValue = Math.Max(Math.Min(newValue, scroll.Maximum - scroll.LargeChange + 1), scroll.Minimum);
                        scroll.Value = newValue;
                        scrolled = true;
                    }
                }
            }
            else
            {
                SchedulerDayViewElement dayView = this.Scheduler.ViewElement as SchedulerDayViewElement;
                RadScrollBarElement scroll = dayView != null ? dayView.AllDayHeaderElement.ScrollBar : null;

                if (scroll != null && scroll.Visibility != ElementVisibility.Collapsed)
                {
                    int newValue = scroll.Value - dayView.AllDayHeaderElement.HeaderHeight * Math.Sign(args.Delta);
                    newValue = Math.Max(Math.Min(newValue, scroll.Maximum - scroll.LargeChange + 1), scroll.Minimum);
                    scroll.Value = newValue;
                    scrolled = true;
                }
            }
        }

        if (scrolled)
        {
            return false;
        }

        if (args.Delta > 0)
        {
            this.Scheduler.ViewElement.Scroll(true);
        }
        else
        {
            this.Scheduler.ViewElement.Scroll(false);
        }
        return false;
    }

    private bool IsLastSelectedAppointmentAllDay(ReadOnlyCollection<IEvent> selectedAppointments)
    {
        if (selectedAppointments.Count > 0)
        {
            return selectedAppointments[selectedAppointments.Count - 1].AllDay;
        }

        return false;
    }

}

RadScheduler printing does not take in consideration the Ruler scale and always print with 30 minutes timescale.

The width of a resource does not always match the column(s) underneath it, resulting in the resources shifting to the left in relation to the column(s) below. It appears to be about 1 pixel  difference per resource which becomes more noticeable with multiple resources .If you resize the form the resources will come close to matching the column(s) before jumping back to the full difference again. This issue can be demonstrated in the Scheduler->Grouping demo

Filtering should not show the appointments which have their resources not visible.

Add functionality to arrange appointments according their start time.

Add scroll bar to the all day area in the Day/Week/WorkWeek views

IMPROVE. RadScheduler, add functionality to stop the InlineEditors

Steps to reproduce:
1. Add a RadSchduler to a form (No need to add appointments) 
2. Set the active view type to Timeline 
3. Set the Appointmentheight property of the timeline view element to 50 
4. Run the project, right-click on the scheduler and select Next View You will see a NullReferenceException exception.

Steps to reproduce:
1. Add a RadReminder component to a form
2. Set the StartNotificaton property to a TimeSpan of one hour and several minutes
3. Add a remind object to the reminder in a way that the time between now and the beginning of the appointment would be in the time interval between now and the now plus the reminder start notofication.
(e.g. this.radReminder1.StartNotification = new TimeSpan(1, 30, 0);
DateTime now = DateTime.Now;
this.radReminder1.AddRemindObject(new Appointment(now.AddMinutes(70), now.AddMinutes(90), "text"));

Start the project and show the reminder. You will see that the "Due in" time would not be correct.

Currently the default RadSchedulerReminder behavior is to remind about appointments before Start date occurs, e.g 15 min before start date. Improve the RadSchedulerReminder to support reminder before the appointment ends too.

IMPROVE. RadScheduler - Add CellSelected event that will be firing when the cell is selected.