/// <summary>
/// Determines if the specified <paramref name="day"/> is a valid day in regard to the <paramref name="date"/> value.
/// </summary>
/// <param name="day">The day value.</param>
/// <param name="date">The year and month value.</param>
/// <param name="cal">The calendar to use.</param>
/// <returns>true if it's a valid day; false otherwise.</returns>
private static bool IsValidDay(int day, DateTime date, Calendar cal)
{
return(day >= 1 && day <= DateMethods.GetDaysInMonth(new MonthCalendarDate(cal, date)));
}
/// <summary>
/// Processes a dialog key.
/// </summary>
/// <param name="keyData">One of the <see cref="System.Windows.Forms.Keys"/> values that represents the key to process.</param>
/// <returns>true if the key was processed by the control; otherwise, false.</returns>
protected override bool ProcessDialogKey(Keys keyData)
{
if (keyData == Keys.Left || keyData == Keys.Right)
{
this.SetDatePart(keyData == Keys.Left ? this.RightToLeft == RightToLeft.No : this.RightToLeft == RightToLeft.Yes);
return(true);
}
Calendar cal = this.datePicker.Picker.CultureCalendar;
MonthCalendarDate dt = new MonthCalendarDate(cal, this.currentDate);
DateTime date = this.Date;
if (keyData == Keys.Up || keyData == Keys.Down)
{
bool up = keyData == Keys.Up;
switch (this.selectedPart)
{
case SelectedDatePart.Day:
{
int day = dt.Day + (up ? 1 : -1);
int daysInMonth = DateMethods.GetDaysInMonth(dt);
if (day > daysInMonth)
{
day = 1;
}
else if (day < 1)
{
day = daysInMonth;
}
date = new DateTime(dt.Year, dt.Month, day, cal);
break;
}
case SelectedDatePart.Month:
{
int day = dt.Day;
int month = dt.Month + (up ? 1 : -1);
int monthsInYear = cal.GetMonthsInYear(dt.Year);
if (month > monthsInYear)
{
month = 1;
}
else if (month < 1)
{
month = monthsInYear;
}
DateTime newDate = new DateTime(dt.Year, month, 1, cal);
dt = new MonthCalendarDate(cal, newDate);
int daysInMonth = DateMethods.GetDaysInMonth(dt);
newDate = daysInMonth < day?cal.AddDays(newDate, daysInMonth - 1) : cal.AddDays(newDate, day - 1);
date = newDate;
break;
}
case SelectedDatePart.Year:
{
int year = dt.Year + (up ? 1 : -1);
int minYear = cal.GetYear(this.MinDate);
int maxYear = cal.GetYear(this.MaxDate);
year = Math.Max(minYear, Math.Min(year, maxYear));
int yearDiff = year - dt.Year;
date = cal.AddYears(this.currentDate, yearDiff);
break;
}
}
this.Date = date < this.MinDate ? this.MinDate : (date > this.MaxDate ? this.MaxDate : date);
this.Refresh();
return(true);
}
if (keyData == Keys.Home || keyData == Keys.End)
{
bool first = keyData == Keys.Home;
switch (this.selectedPart)
{
case SelectedDatePart.Day:
{
date = first ? new DateTime(dt.Year, dt.Month, 1, cal)
: new DateTime(dt.Year, dt.Month, DateMethods.GetDaysInMonth(dt), cal);
break;
}
case SelectedDatePart.Month:
{
int day = dt.Day;
date = first ? new DateTime(dt.Year, 1, 1, cal)
: new DateTime(dt.Year, cal.GetMonthsInYear(dt.Year), 1, cal);
int daysInMonth = DateMethods.GetDaysInMonth(dt);
date = day > daysInMonth?cal.AddDays(date, daysInMonth - 1)
: cal.AddDays(date, day - 1);
break;
}
case SelectedDatePart.Year:
{
date = first ? this.MinDate.Date : this.MaxDate.Date;
break;
}
}
this.Date = date < this.MinDate ? this.MinDate : (date > this.MaxDate ? this.MaxDate : date);
this.Refresh();
return(true);
}
if (keyData == Keys.Space && !this.inEditMode)
{
this.datePicker.SwitchPickerState();
return(true);
}
return(base.ProcessDialogKey(keyData));
}