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Months Custom Function Code:

Previous Month Custom Function Code:

"Build a Custom Calendar Widget in Flutterflow" Tutorial - by TBNoCode

Next Month Custom Function Code:

We will build a custom calendar widget in Flutterflow. It is multifunctional and you can continue to develop this widget with your imaginations. I leave there tutorial and custom function codes. I suggest you to watch video and follow my steps exactly I do. Custom function codes are below and be aware to configure all arguments and return values are same like in the video.

import 'dart:convert';
import 'dart:math' as math;

import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:intl/intl.dart';
import 'package:timeago/timeago.dart' as timeago;
import '/flutter_flow/lat_lng.dart';
import '/flutter_flow/place.dart';
import '/flutter_flow/uploaded_file.dart';
import '/flutter_flow/custom_functions.dart';
import '/backend/supabase/supabase.dart';
import '/auth/supabase_auth/auth_util.dart';

List<DateTime>? months(DateTime? current) {
  /// MODIFY CODE ONLY BELOW THIS LINE

  if (current == null) {
    return null;
  }

  List<DateTime> monthDays = [];

  // Get the first day of the current month
  DateTime firstDay = DateTime(current.year, current.month, 1);

  // Get the last day of the current month
  DateTime lastDay = DateTime(current.year, current.month + 1, 0);

  // Get the weekday of the first day of the month
  int startWeekday = firstDay.weekday;

  // Get the total number of days in the month
  int totalDays = lastDay.day;

  // Calculate the number of days to display from the previous month
  int prevMonthDays = startWeekday - 1;

  // Get the last day of the previous month
  DateTime prevLastDay = DateTime(current.year, current.month, 0);

  // Add the days from the previous month to the list
  for (int i = prevLastDay.day - prevMonthDays + 1; i <= prevLastDay.day; i++) {
    monthDays.add(DateTime(current.year, current.month - 1, i));
  }

  // Add the days from the current month to the list
  for (int i = 1; i <= totalDays; i++) {
    monthDays.add(DateTime(current.year, current.month, i));
  }

  // Calculate the number of days to display from the next month
  int nextMonthDays = 42 - monthDays.length;

  // Add the days from the next month to the list
  for (int i = 1; i <= nextMonthDays; i++) {
    monthDays.add(DateTime(current.year, current.month + 1, i));
  }

  return monthDays;

  /// MODIFY CODE ONLY ABOVE THIS LINE
}
import 'dart:convert';
import 'dart:math' as math;

import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:intl/intl.dart';
import 'package:timeago/timeago.dart' as timeago;
import '/flutter_flow/lat_lng.dart';
import '/flutter_flow/place.dart';
import '/flutter_flow/uploaded_file.dart';
import '/flutter_flow/custom_functions.dart';
import '/backend/supabase/supabase.dart';
import '/auth/supabase_auth/auth_util.dart';

DateTime? nextmonth(DateTime current) {
  /// MODIFY CODE ONLY BELOW THIS LINE


  return current.add(Duration(days: 30));

  /// MODIFY CODE ONLY ABOVE THIS LINE
}
import 'dart:convert';
import 'dart:math' as math;

import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:intl/intl.dart';
import 'package:timeago/timeago.dart' as timeago;
import '/flutter_flow/lat_lng.dart';
import '/flutter_flow/place.dart';
import '/flutter_flow/uploaded_file.dart';
import '/flutter_flow/custom_functions.dart';
import '/backend/supabase/supabase.dart';
import '/auth/supabase_auth/auth_util.dart';

DateTime? previousmotnh(DateTime current) {
  /// MODIFY CODE ONLY BELOW THIS LINE

  return current.subtract(Duration(days: 30));

  /// MODIFY CODE ONLY ABOVE THIS LINE
}

How To Set "Custom Calendar" in Flutterflow!