DotNet 4.8.1 build of DotNetBar
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#if FRAMEWORK20
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Collections.ObjectModel;
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using DevComponents.Schedule.Model.Primitives;
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namespace DevComponents.Schedule.Model
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{
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/// <summary>
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/// Represents subset of appointments collection.
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/// </summary>
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public class AppointmentSubsetCollection : CustomCollection<Appointment>
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{
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#region Private Variables
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private DateTime _StartDate = DateTime.MinValue;
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private DateTime _EndDate = DateTime.MinValue;
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#endregion
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#region Constructor
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/// <summary>
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/// Initializes a new instance of the AppointmentSubsetCollection class with appointments between given start and end date.
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/// </summary>
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/// <param name="calendar"></param>
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/// <param name="start"></param>
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/// <param name="end"></param>
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public AppointmentSubsetCollection(CalendarModel calendar, DateTime start, DateTime end)
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{
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_Calendar = calendar;
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_StartDate = start;
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_EndDate = end;
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PopulateCollection();
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}
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#endregion
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#region Internal Implementation
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private CalendarModel _Calendar = null;
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/// <summary>
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/// Gets the calendar collection is associated with this collection.
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/// </summary>
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public CalendarModel Calendar
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{
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get { return _Calendar; }
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internal set { _Calendar = value; }
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}
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protected override void InsertItem(int index, Appointment item)
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{
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OnBeforeInsert(index, item);
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base.InsertItem(index, item);
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}
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private void OnBeforeInsert(int index, Appointment item)
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{
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item.SubPropertyChanged += this.ChildPropertyChangedEventHandler;
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item.Calendar = _Calendar;
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if (item.IsRecurringInstance && _Calendar != null)
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_Calendar.InternalAppointmentAdded(item);
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}
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protected override void SetItem(int index, Appointment item)
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{
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OnBeforeSetItem(index, item);
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base.SetItem(index, item);
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}
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private void OnBeforeSetItem(int index, Appointment item)
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{
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Appointment app = this[index];
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app.SubPropertyChanged -= this.ChildPropertyChangedEventHandler;
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app.Calendar = null;
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item.SubPropertyChanged += this.ChildPropertyChangedEventHandler;
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app.Calendar = _Calendar;
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}
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protected override void RemoveItem(int index)
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{
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OnBeforeRemove(index);
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base.RemoveItem(index);
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}
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private void OnBeforeRemove(int index)
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{
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Appointment item = this[index];
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OnAppointmentRemoved(item);
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}
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private void OnAppointmentRemoved(Appointment item)
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{
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item.SubPropertyChanged -= this.ChildPropertyChangedEventHandler;
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if (item.IsRecurringInstance && _Calendar != null)
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_Calendar.InternalAppointmentRemoved(item, false);
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if (item.IsRecurringInstance)
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item.Calendar = null;
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}
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protected override void ClearItems()
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{
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foreach (Appointment item in this.GetItemsDirect())
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{
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OnAppointmentRemoved(item);
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}
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base.ClearItems();
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}
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private void PopulateCollection()
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{
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this.Clear();
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foreach (Appointment app in _Calendar.Appointments)
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{
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if (app.LocalStartTime >= _StartDate && app.LocalStartTime <= _EndDate || app.LocalEndTime > _StartDate && (app.LocalEndTime <= _EndDate || app.LocalStartTime < _StartDate))
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{
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this.Add(app);
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}
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if (app.Recurrence != null && IsRecurrenceInRange(app, _StartDate, _EndDate))
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{
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int count = this.GetItemsDirect().Count;
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app.Recurrence.GenerateSubset(this, _StartDate, _EndDate);
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if (count == this.GetItemsDirect().Count && TotalDaysDuration(app.StartTime, app.EndTime) >= 1 &&
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app.LocalEndTime < _StartDate)
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{
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// Nothing generated lets wind back and look to see is there an recurrence that needs to be captured in this view
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int daysLookBack = TotalDaysDuration(app.StartTime, app.EndTime);
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DateTime start = _StartDate;
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for (int i = 0; i < daysLookBack; i++)
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{
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start = start.AddDays(-1);
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AppointmentSubsetCollection dayCollection = _Calendar.GetDay(start).Appointments;
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foreach (Appointment subAppointment in dayCollection)
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{
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if (subAppointment.IsRecurringInstance && subAppointment.RootAppointment == app &&
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(subAppointment.LocalStartTime >= _StartDate && subAppointment.LocalStartTime <= _EndDate ||
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subAppointment.LocalEndTime > _StartDate && (subAppointment.LocalEndTime <= _EndDate ||
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subAppointment.LocalStartTime < _StartDate)))
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{
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this.Add(subAppointment);
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daysLookBack = -1;
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break;
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}
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}
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}
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}
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}
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}
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_IsCollectionUpToDate = true;
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}
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private int TotalDaysDuration(DateTime startTime, DateTime endTime)
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{
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if (endTime.Hour == 0 && endTime.Minute == 0 && endTime.Second == 0)
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endTime = endTime.AddMinutes(-1);
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return (int)Math.Max(0, Math.Ceiling(endTime.Date.Subtract(startTime.Date).TotalDays));
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}
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private bool IsRecurrenceInRange(Appointment app, DateTime startDate, DateTime endDate)
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{
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if (app.Recurrence.RecurrenceType == eRecurrencePatternType.Yearly)
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{
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// Simple range check on number of occurrences
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if (app.Recurrence.RangeLimitType == eRecurrenceRangeLimitType.RangeNumberOfOccurrences && app.LocalEndTime.Subtract(endDate).TotalDays / 365 > app.Recurrence.RangeNumberOfOccurrences)
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return false;
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// Date check based on next expected recurrence date
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if (app.Recurrence.Yearly.RepeatInterval > 1)
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{
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DateTime nextRecurrence = DateTimeHelper.MaxDate(app.Recurrence.RecurrenceStartDate, app.EndTime.AddDays(1).Date);
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while (nextRecurrence < startDate)
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nextRecurrence = RecurrenceGenerator.GetNextYearlyRecurrence(app.Recurrence, nextRecurrence);
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if (nextRecurrence > endDate || nextRecurrence.Add(endDate.Subtract(startDate)) < startDate)
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return false;
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}
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else
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{
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DateTime nextRecurrence = RecurrenceGenerator.GetNextYearlyRecurrence(app.Recurrence, startDate.Date.AddDays(-startDate.DayOfYear));
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if (nextRecurrence > endDate || nextRecurrence.Add(endDate.Subtract(startDate)) < startDate)
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return false;
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}
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}
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if (app.Recurrence.RangeEndDate == DateTime.MinValue || app.Recurrence.RangeEndDate >= _EndDate || app.Recurrence.RangeEndDate < _EndDate && app.Recurrence.RangeEndDate > _StartDate)
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return true;
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return false;
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}
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private SubPropertyChangedEventHandler _ChildPropertyChangedEventHandler = null;
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private SubPropertyChangedEventHandler ChildPropertyChangedEventHandler
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{
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get
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{
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if (_ChildPropertyChangedEventHandler == null) _ChildPropertyChangedEventHandler = new SubPropertyChangedEventHandler(ChildPropertyChanged);
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return _ChildPropertyChangedEventHandler;
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}
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}
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private void ChildPropertyChanged(object sender, SubPropertyChangedEventArgs e)
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{
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InvalidateCollection();
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}
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/// <summary>
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/// Invalidates collection content due to the change to appointments or some other condition. Invalidating collection
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/// content causes the collection elements to be re-generated on next collection read access.
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/// </summary>
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public virtual void InvalidateCollection()
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{
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_IsCollectionUpToDate = false;
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}
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protected override void OnCollectionReadAccess()
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{
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if (!_IsCollectionUpToDate) PopulateCollection();
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base.OnCollectionReadAccess();
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}
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private bool _IsCollectionUpToDate = false;
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internal bool IsCollectionUpToDate
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{
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get { return _IsCollectionUpToDate; }
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set
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{
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_IsCollectionUpToDate = value;
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}
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}
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#endregion
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}
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}
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#endif
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