private void BuildItems()
{
if (_itemsGrid != null)
{
AddDefaultItems();
var startOfMonth = new DateTime(_year, _month, 1);
DayOfWeek dayOfWeek = startOfMonth.DayOfWeek;
var daysInMonth = (int)Math.Floor(startOfMonth.AddMonths(1).Subtract(startOfMonth).TotalDays);
var addedDays = 0;
int lastWeekNumber = 0;
for (int rowCount = 1; rowCount <= RowCount; rowCount++)
{
for (var columnCount = 1; columnCount < ColumnCount; columnCount++)
{
var item = (CalendarItem)(from oneChild in _itemsGrid.Children
where oneChild is CalendarItem &&
((CalendarItem)oneChild).Tag.ToString() == string.Concat(rowCount.ToString(), ":", columnCount.ToString())
select oneChild).First();
if (rowCount == 1 && columnCount < (int)dayOfWeek + 1)
{
item.Visibility = Visibility.Collapsed;
}
else if (addedDays < daysInMonth)
{
item.Visibility = Visibility.Visible;
}
else
{
item.Visibility = Visibility.Collapsed;
}
var weekItem = (CalendarWeekItem)(from oneChild in _itemsGrid.Children
where oneChild is CalendarWeekItem &&
((CalendarWeekItem)oneChild).Tag.ToString() == string.Concat(rowCount.ToString(), ":0")
select oneChild).FirstOrDefault();
if (item.Visibility == Visibility.Visible)
{
item.ItemDate = startOfMonth.AddDays(addedDays);
if (SelectedDate == DateTime.MinValue && item.ItemDate == DateTime.Today)
{
SelectedDate = item.ItemDate;
if (ShowSelectedDate)
item.IsSelected = true;
_lastItem = item;
}
else
{
if (item.ItemDate == SelectedDate)
{
if (ShowSelectedDate)
item.IsSelected = true;
}
else
{
item.IsSelected = false;
}
}
addedDays += 1;
item.DayNumber = addedDays;
item.SetBackcolor();
item.SetForecolor();
if (WeekNumberDisplay != WeekNumberDisplayOption.None)
{
int weekNumber;
if (WeekNumberDisplay == WeekNumberDisplayOption.WeekOfYear)
{
var systemCalendar = System.Globalization.CultureInfo.CurrentCulture.Calendar;
weekNumber = systemCalendar.GetWeekOfYear(
item.ItemDate,
System.Globalization.CultureInfo.CurrentCulture.DateTimeFormat.CalendarWeekRule,
System.Globalization.CultureInfo.CurrentCulture.DateTimeFormat.FirstDayOfWeek);
}
else
{
weekNumber = rowCount;
}
if (weekItem != null)
{
weekItem.WeekNumber = weekNumber;
lastWeekNumber = weekNumber;
weekItem.Visibility = Visibility.Visible;
}
}
}
else
{
if (WeekNumberDisplay != WeekNumberDisplayOption.None && weekItem != null && weekItem.WeekNumber != lastWeekNumber)
{
weekItem.Visibility = Visibility.Collapsed;
}
}
}
}
}
}
private void ItemClick(object sender, RoutedEventArgs e)
{
if (_lastItem != null)
{
_lastItem.IsSelected = false;
}
_lastItem = (sender as CalendarItem);
if (_lastItem != null)
{
if (ShowSelectedDate)
_lastItem.IsSelected = true;
SelectedDate = _lastItem.ItemDate;
OnDateClicked(_lastItem.ItemDate);
}
}
private void AddDefaultItems()
{
if (!_addedItems && _itemsGrid != null)
{
for (int rowCount = 1; rowCount <= RowCount; rowCount++)
{
for (int columnCount = 1; columnCount < ColumnCount; columnCount++)
{
var item = new CalendarItem(this);
item.SetValue(Grid.RowProperty, rowCount);
item.SetValue(Grid.ColumnProperty, columnCount);
item.Visibility = Visibility.Collapsed;
item.Tag = string.Concat(rowCount.ToString(), ":", columnCount.ToString());
item.Click += ItemClick;
if (CalendarItemStyle != null)
{
item.Style = CalendarItemStyle;
}
_itemsGrid.Children.Add(item);
}
if (WeekNumberDisplay != WeekNumberDisplayOption.None)
{
const int columnCount = 0;
var item = new CalendarWeekItem();
item.SetValue(Grid.RowProperty, rowCount);
item.SetValue(Grid.ColumnProperty, columnCount);
item.Visibility = Visibility.Collapsed;
item.Tag = string.Concat(rowCount.ToString(), ":", columnCount.ToString());
if (CalendarWeekItemStyle != null)
{
item.Style = CalendarWeekItemStyle;
}
_itemsGrid.Children.Add(item);
}
}
_addedItems = true;
}
}