How to Create a Heatmap Calendar in Flutter

Flutter Heatmap Calendar inspired by github contribution chart.

Flutter Heatmap Calendar provides traditional contribution chart called HeatMap and calendar version of it called HeatMapCalendar.

Getting started

Depend on it.

flutter pub add flutter_heatmap_calendar

or

Add below line to your personal package's pubspec.yaml.

dependencies:
  flutter_heatmap_calendar: ^1.0.5

And run flutter pub get to install.

Import it.

import 'package:flutter_heatmap_calendar/flutter_heatmap_calendar.dart';

Props

HeatMap

Props	Types	Default	Description
startDate	DateTime?	1 year before of the endDate	Start date of HeatMap.
endDate	DateTime?	Today ( DateTime.now() )	Last day of HeatMap.
datasets	Map<DateTime, int>?	null	Sets of data which to be displayed.
colorsets	Map<int, Color>	required	Sets of color values for its thresholds key value. At least one Color is required. Be aware that only first color will be used if ColorMode is ColorMode.opacity.
defaultColor	Color?	Color(0xFFF8F9FA)	Default color of every block.
textColor	Color?	Color(0xFF8A8A8A)	Color value of every text.
colorMode	ColorMode	ColorMode.opacity	ColorMode.opacity requires just one colorsets value and changes color dynamically based on hightest value of datasets. ColorMode.color changes colors based on colorsets thresholds key value.
size	double?	20	The size of every block.
fontSize	double?	null	The size of every text.
onClick	Function(DateTime)?	null	Callback function which will be called if user clicks the block.
margin	EdgeInsets?	EdgeInsets.all(2)	The margin value of block.
borderRadius	double?	5	Border radius value of block.
scrollable	bool	false	Make HeatMap scrollable if scrollable is true.
showText	bool?	false	Show day text in every block if showText is true.
showColorTip	bool?	true	Show color tip if showColorTip is true.
colorTipHelper	List<Widget?>?	null	Widgets which are shown at left and right side of colorTip. First value is the left side widget and second value is the right side widget. Give null value makes default 'less' and 'more' text.
colorTipCount	int?	7	Length of colorTip block.
colorTipSize	double?	10	The size of colorTip.

HeatMapCalendar

Props	Types	Default	Description
initDate	DateTime?	Today ( DateTime.now() )	Initialized Year/Month value of HeatMapCalendar.
datasets	Map<DateTime, int>?	null	Sets of data which to be displayed.
colorsets	Map<int, Color>	required	Sets of color values for its thresholds key value. At least one Color is required. Be aware that only first color will be used if ColorMode is ColorMode.opacity.
defaultColor	Color?	Color(0xFFF8F9FA)	Default color of every block.
textColor	Color?	Color(0xFF8A8A8A)	Color value of every text.
colorMode	ColorMode	ColorMode.opacity	ColorMode.opacity requires just one colorsets value and changes color dynamically based on hightest value of datasets. ColorMode.color changes colors based on colorsets thresholds key value.
size	double?	42	The size of every block.
fontSize	double?	null	The size of every text.
monthFontSize	double?	12	The size of month label.
weekFontSize	double?	12	The size of week label.
weekTextColor	Color?	Color(0xFF758EA1)	Default color of every block.
onClick	Function(DateTime)?	null	Callback function which will be called if user clicks the block.
margin	EdgeInsets	EdgeInsets.all(2)	The margin value of block.
borderRadius	double?	5	Border radius value of block.
flexible	bool?	false	Makes HeatMapCalendar's size dynamically fit on screen. If flexible is true then, size props will be ignored.
showColorTip	bool?	true	Show color tip if showColorTip is true.
colorTipHelper	List<Widget?>?	null	Widgets which are shown at left and right side of colorTip. First value is the left side widget and second value is the right side widget. Give null value makes default 'less' and 'more' text.
colorTipCount	int?	7	Length of colorTip block.
colorTipSize	double?	10	The size of colorTip.

Example

HeatMap

import 'package:flutter_heatmap_calendar/flutter_heatmap_calendar.dart';
...
HeatMap(
  datasets: {
    DateTime(2021, 1, 6): 3,
    DateTime(2021, 1, 7): 7,
    DateTime(2021, 1, 8): 10,
    DateTime(2021, 1, 9): 13,
    DateTime(2021, 1, 13): 6,
  },
  colorMode: ColorMode.opacity,
  showText: false,
  scrollable: true,
  colorsets: {
    1: Colors.red,
    3: Colors.orange,
    5: Colors.yellow,
    7: Colors.green,
    9: Colors.blue,
    11: Colors.indigo,
    13: Colors.purple,
  },
  onClick: (value) {
    ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(value.toString())));
  },
);

HeatMapCalendar

import 'package:flutter_heatmap_calendar/flutter_heatmap_calendar.dart';
...
HeatMapCalendar(
  defaultColor: Colors.white,
  flexible: true,
  colorMode: ColorMode.color,
  datasets: {
    DateTime(2021, 1, 6): 3,
    DateTime(2021, 1, 7): 7,
    DateTime(2021, 1, 8): 10,
    DateTime(2021, 1, 9): 13,
    DateTime(2021, 1, 13): 6,
  },
  colorsets: const {
    1: Colors.red,
    3: Colors.orange,
    5: Colors.yellow,
    7: Colors.green,
    9: Colors.blue,
    11: Colors.indigo,
    13: Colors.purple,
  },
  onClick: (value) {
    ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(value.toString())));
  },
);

License

MIT License

Copyright (c) 2021 Kim Seung Hwan

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

View on GitHub: https://github.com/devappmin/flutter_heatmap_calendar 

#flutter