public override Widget build(BuildContext context)
{
ColorScheme colorScheme = Theme.of(context).colorScheme;
MaterialLocalizations localizations = MaterialLocalizations.of(context);
TextTheme textTheme = Theme.of(context).textTheme;
TextStyle dayStyle = textTheme.caption;
Color enabledDayColor = colorScheme.onSurface.withOpacity(0.87f);
Color disabledDayColor = colorScheme.onSurface.withOpacity(0.38f);
Color selectedDayColor = colorScheme.onPrimary;
Color selectedDayBackground = colorScheme.primary;
Color todayColor = colorScheme.primary;
int year = displayedMonth.Year;
int month = displayedMonth.Month;
int daysInMonth = utils.getDaysInMonth(year, month);
int dayOffset = utils.firstDayOffset(year, month, localizations);
List <Widget> dayItems = new List <Widget>();
// 1-based day of month, e.g. 1-31 for January, and 1-29 for February on
// a leap year.
int day = -dayOffset;
while (day < daysInMonth)
{
day++;
if (day < 1)
{
dayItems.Add(new Container());
}
else
{
DateTime dayToBuild = new DateTime(year, month, day);
bool isDisabled = dayToBuild > lastDate ||
dayToBuild < firstDate ||
(selectableDayPredicate != null && !selectableDayPredicate(dayToBuild));
BoxDecoration decoration = null;
Color dayColor = enabledDayColor;
bool isSelectedDay = utils.isSameDay(selectedDate, dayToBuild);
if (isSelectedDay)
{
// The selected day gets a circle background highlight, and a
// contrasting text color.
dayColor = selectedDayColor;
decoration = new BoxDecoration(
color: selectedDayBackground,
shape: BoxShape.circle
);
}
else if (isDisabled)
{
dayColor = disabledDayColor;
}
else if (utils.isSameDay(currentDate, dayToBuild))
{
// The current day gets a different text color and a circle stroke
// border.
dayColor = todayColor;
decoration = new BoxDecoration(
border: Border.all(color: todayColor, width: 1),
shape: BoxShape.circle
);
}
Widget dayWidget = new Container(
decoration: decoration,
child: new Center(
child: new Text(localizations.formatDecimal(day), style: dayStyle.apply(color: dayColor))
)
);
if (!isDisabled)
{
dayWidget = new GestureDetector(
behavior: HitTestBehavior.opaque,
onTap: () => onChanged(dayToBuild),
child: dayWidget
);
}
dayItems.Add(dayWidget);
}
}
return(new Padding(
padding: EdgeInsets.symmetric(
horizontal: material_._monthPickerHorizontalPadding
),
child: GridView.custom(
physics: new ClampingScrollPhysics(),
gridDelegate: material_._dayPickerGridDelegate,
childrenDelegate: new SliverChildListDelegate(
dayItems,
addRepaintBoundaries: false
)
)
));
}