Customizable date/weekday format

lib/src/header/date_indicator.dart

@@ -1,6 +1,7 @@
 import 'package:black_hole_flutter/black_hole_flutter.dart';
 import 'package:flutter/material.dart';
 import 'package:time_machine/time_machine.dart';
+import 'package:time_machine/time_machine_text_patterns.dart';
 
 import '../theme.dart';
 import '../utils/utils.dart';
@@ -16,6 +17,8 @@ class DateIndicator extends StatelessWidget {
     final timetableTheme = context.timetableTheme;
 
     final states = statesFor(date);
+    final pattern = timetableTheme?.dateIndicatorPattern?.resolve(states) ??
+        LocalDatePattern.createWithCurrentCulture('%d');
     final primaryColor = timetableTheme?.primaryColor ?? theme.primaryColor;
     final decoration =
         timetableTheme?.dateIndicatorDecoration?.resolve(states) ??
@@ -34,10 +37,7 @@ class DateIndicator extends StatelessWidget {
       decoration: decoration,
       child: Padding(
         padding: EdgeInsets.all(8),
-        child: Text(
-          date.dayOfMonth.toString(),
-          style: textStyle,
-        ),
+        child: Text(pattern.format(date), style: textStyle),
       ),
     );
   }

lib/src/header/timetable_header.dart

@@ -3,6 +3,7 @@ import 'package:time_machine/time_machine.dart';
 
 import '../controller.dart';
 import '../event.dart';
+import '../theme.dart';
 import '../timetable.dart';
 import 'all_day_events.dart';
 import 'multi_date_header.dart';
@@ -43,7 +44,7 @@ class TimetableHeader<E extends Event> extends StatelessWidget {
             mainAxisSize: MainAxisSize.min,
             children: <Widget>[
               SizedBox(
-                height: 72,
+                height: context.timetableTheme?.totalDateIndicatorHeight ?? 72,
                 child: MultiDateHeader(controller: controller),
               ),
               AllDayEvents<E>(

lib/src/header/weekday_indicator.dart

@@ -10,8 +10,6 @@ import 'date_indicator.dart';
 class WeekdayIndicator extends StatelessWidget {
   const WeekdayIndicator(this.date, {Key key}) : super(key: key);
 
-  static final _pattern = LocalDatePattern.createWithCurrentCulture('ddd');
-
   final LocalDate date;
 
   @override
@@ -20,6 +18,8 @@ class WeekdayIndicator extends StatelessWidget {
     final timetableTheme = context.timetableTheme;
 
     final states = DateIndicator.statesFor(date);
+    final pattern = timetableTheme?.weekDayIndicatorPattern?.resolve(states) ??
+        LocalDatePattern.createWithCurrentCulture('ddd');
     final decoration =
         timetableTheme?.weekDayIndicatorDecoration?.resolve(states) ??
             BoxDecoration();
@@ -35,10 +35,7 @@ class WeekdayIndicator extends StatelessWidget {
       decoration: decoration,
       child: Padding(
         padding: EdgeInsets.all(8),
-        child: Text(
-          _pattern.format(date),
-          style: textStyle,
-        ),
+        child: Text(pattern.format(date), style: textStyle),
       ),
     );
   }

lib/src/theme.dart

@@ -1,5 +1,7 @@
 import 'package:flutter/material.dart';
+import 'package:meta/meta.dart';
 import 'package:time_machine/time_machine.dart';
+import 'package:time_machine/time_machine_text_patterns.dart';
 
 import 'timetable.dart';
 
@@ -9,8 +11,11 @@ class TimetableThemeData {
     this.primaryColor,
     this.weekIndicatorDecoration,
     this.weekIndicatorTextStyle,
+    this.totalDateIndicatorHeight,
+    this.weekDayIndicatorPattern,
     this.weekDayIndicatorDecoration,
     this.weekDayIndicatorTextStyle,
+    this.dateIndicatorPattern,
     this.dateIndicatorDecoration,
     this.dateIndicatorTextStyle,
     this.allDayEventHeight,
@@ -43,6 +48,20 @@ class TimetableThemeData {
   /// [TextStyle] used to display the current week number.
   final TextStyle weekIndicatorTextStyle;
 
+  /// Total (combined) height of both the day-of-week- and
+  /// date-of-month-indicators.
+  ///
+  /// > **Note:** This will soon be determined automatically based on the actual
+  /// > height.
+  @experimental
+  final double totalDateIndicatorHeight;
+
+  /// [LocalDatePattern] for formatting the day-of-week.
+  ///
+  /// See also:
+  /// - [dateIndicatorTextStyle] for a list of possible states.
+  final MaterialStateProperty<LocalDatePattern> weekDayIndicatorPattern;
+
   /// [Decoration] to show around the day-of-week-indicator.
   ///
   /// See also:
@@ -55,6 +74,12 @@ class TimetableThemeData {
   /// - [dateIndicatorTextStyle] for a list of possible states.
   final MaterialStateProperty<TextStyle> weekDayIndicatorTextStyle;
 
+  /// [LocalDatePattern] for formatting the date (of month).
+  ///
+  /// See also:
+  /// - [dateIndicatorTextStyle] for a list of possible states.
+  final MaterialStateProperty<LocalDatePattern> dateIndicatorPattern;
+
   /// [Decoration] to show around the date (of month) indicator.
   ///
   /// See also:
@@ -119,8 +144,11 @@ class TimetableThemeData {
       primaryColor,
       weekIndicatorDecoration,
       weekIndicatorTextStyle,
+      totalDateIndicatorHeight,
+      weekDayIndicatorPattern,
       weekDayIndicatorDecoration,
       weekDayIndicatorTextStyle,
+      dateIndicatorPattern,
       dateIndicatorDecoration,
       dateIndicatorTextStyle,
       allDayEventHeight,
@@ -148,8 +176,11 @@ class TimetableThemeData {
         other.primaryColor == primaryColor &&
         other.weekIndicatorDecoration == weekIndicatorDecoration &&
         other.weekIndicatorTextStyle == weekIndicatorTextStyle &&
+        other.totalDateIndicatorHeight == totalDateIndicatorHeight &&
+        other.weekDayIndicatorPattern == weekDayIndicatorPattern &&
         other.weekDayIndicatorDecoration == weekDayIndicatorDecoration &&
         other.weekDayIndicatorTextStyle == weekDayIndicatorTextStyle &&
+        other.dateIndicatorPattern == dateIndicatorPattern &&
         other.dateIndicatorDecoration == dateIndicatorDecoration &&
         other.dateIndicatorTextStyle == dateIndicatorTextStyle &&
         other.allDayEventHeight == allDayEventHeight &&