private void SetYearMode()
{
this.monthUniformGrid.Visibility = this.decadeUniformGrid.Visibility = Visibility.Collapsed;
this.yearUniformGrid.Visibility = Visibility.Visible;
this.titleButton.Content = this.DisplayDate.Year.ToString();
for (int i = 0; i < 12; i++)
{
int month = i + 1;
if (PersianDate.IsValid(DisplayDate.Year, month, 1) &&
new PersianDate(DisplayDate.Year, month, PersianDate.DaysInMonth(DisplayDate.Year, month)) >= DisplayDateStart &&
new PersianDate(DisplayDate.Year, month, 1) <= DisplayDateEnd)
{
yearModeButtons[i].Content = ((PersianMonth)month).ToString();
yearModeButtons[i].IsEnabled = true;
}
else
{
yearModeButtons[i].Content = "";
yearModeButtons[i].IsEnabled = false;
}
}
}
private PersianDate AddYear(int year, int month, int day, int factor)
{
year += factor;
if (!PersianDate.IsValid(year, month, day))
{
if (PersianDate.DaysInMonth(year, month) < day)
{
day = PersianDate.DaysInMonth(year, month);
}
}
return(new PersianDate(year, month, day));
}
private void nextButton_Click(object sender, RoutedEventArgs e)
{
int m = this.DisplayDate.Month;
int y = this.DisplayDate.Year;
try
{
PersianDate newDisplayDate = DisplayDate;
if (this.DisplayMode == CalendarType.Month)
{
if (m == 12)
{
if (PersianDate.IsValid(y + 1, 1, 1))
{
newDisplayDate = new PersianDate(y + 1, 1, 1);
}
}
else
{
if (PersianDate.IsValid(y, m + 1, 1))
{
newDisplayDate = new PersianDate(y, m + 1, 1);
}
}
}
else if (this.DisplayMode == CalendarType.Year)
{
if (PersianDate.IsValid(y + 1, 1, 1))
{
newDisplayDate = new PersianDate(y + 1, 1, 1);
}
}
else if (this.DisplayMode == CalendarType.Decade)
{
if (PersianDate.IsValid(y - y % 10 + 10, 1, 1))
{
newDisplayDate = new PersianDate(y - y % 10 + 10, 1, 1);
}
}
if (newDisplayDate >= DisplayDateStart && newDisplayDate <= DisplayDateEnd)
{
this.SetCurrentValue(DisplayDateProperty, newDisplayDate);
}
}
catch (ArgumentOutOfRangeException)
{
}
}
private PersianDate AddMonth(int year, int month, int day, int factor)
{
month += factor;
if (!PersianDate.IsValid(year, month, day))
{
if (month > 12)
{
year++;
month = 1;
}
else if (month < 1)
{
year--;
month = 12;
}
if (PersianDate.DaysInMonth(year, month) < day)
{
day = PersianDate.DaysInMonth(year, month);
}
}
return(new PersianDate(year, month, day));
}