protected internal override void Open()
{
var date = Date;
// If we're setting the date to the null sentinel value,
// we'll instead set it to the current date for the purposes
// of where to place the user's position in the looping selectors.
if (date.Ticks == DatePicker.DEFAULT_DATE_TICKS)
{
var temp = new Windows.Globalization.Calendar();
var calendar = new Windows.Globalization.Calendar(
temp.Languages,
CalendarIdentifier,
temp.GetClock());
calendar.SetToNow();
date = calendar.GetDateTime();
}
// Note: Month needs to be -1 since on Android months go from 0-11
// http://developer.android.com/reference/android/app/DatePickerDialog.OnDateSetListener.html#onDateSet(android.widget.DatePicker, int, int, int)
_dialog = new DatePickerDialog(
ContextHelper.Current,
OnDateSet,
date.Year,
date.Month - 1,
date.Day
);
//Removes title that is unnecessary as it is a duplicate -> http://stackoverflow.com/questions/33486643/remove-title-from-datepickerdialog
_dialog.SetTitle("");
var minYearCalendar = Calendar.Instance;
minYearCalendar.Set(MinYear.Year, MinYear.Month - 1, MinYear.Day, MinYear.Hour, MinYear.Minute, MinYear.Second);
_dialog.DatePicker.MinDate = minYearCalendar.TimeInMillis;
var maxYearCalendar = Calendar.Instance;
maxYearCalendar.Set(MaxYear.Year, MaxYear.Month - 1, MaxYear.Day, MaxYear.Hour, MaxYear.Minute, MaxYear.Second);
_dialog.DatePicker.MaxDate = maxYearCalendar.TimeInMillis;
_dialog.DismissEvent += OnDismiss;
_dialog.Show();
}
private bool FindValidHour(Windows.Globalization.Calendar calendar, int hourStep, int minuteStep, bool isMinDate, bool isMaxDate)
{
var clock = calendar.GetClock();
var minHour = isMinDate && calendar.Period == this.minCalendarWithStep.Period ? this.minCalendarWithStep.ZeroBasedHour() : DateTimeHelper.GetZeroBasedHour(clock, calendar.FirstHourInThisPeriod);
var maxHour = isMaxDate && calendar.Period == this.maxCalendarWithStep.Period ? this.maxCalendarWithStep.ZeroBasedHour() : DateTimeHelper.GetZeroBasedHour(clock, calendar.LastHourInThisPeriod);
var firstHour = DateTimeHelper.GetZeroBasedHour(clock, calendar.FirstHourInThisPeriod);
var currentHour = calendar.ZeroBasedHour();
var hourRemainder = this.GetStepRemainderForComponent(currentHour, firstHour, StepBehavior.StartFromBase, hourStep);
currentHour -= hourRemainder;
if (currentHour < minHour)
{
currentHour += hourStep;
if (currentHour > maxHour)
{
return(false);
}
}
// keep the start calendar
var startCalendar = calendar.Clone();
startCalendar.SetZeroBasedHour(currentHour);
while (currentHour >= minHour)
{
var hoursUpdate = currentHour - calendar.ZeroBasedHour();
calendar.AddHours(hoursUpdate);
if (hoursUpdate < 0)
{
calendar.Minute = calendar.LastMinuteInThisHour;
}
if (this.FindValidMinute(calendar, minuteStep, isMinDate, isMaxDate))
{
return(true);
}
currentHour -= hourStep;
}
calendar = startCalendar.Clone();
currentHour = calendar.Hour;
while (currentHour <= maxHour)
{
var hoursUpdate = currentHour - calendar.ZeroBasedHour();
calendar.AddHours(hoursUpdate);
if (hoursUpdate > 0)
{
calendar.Minute = calendar.FirstMinuteInThisHour;
}
if (this.FindValidMinute(calendar, minuteStep, isMinDate, isMaxDate))
{
return(true);
}
currentHour += hourStep;
}
return(false);
}