Message Information

The CometChatMessageInformation is a Widget designed to display message-related information, such as delivery and read receipts. It serves as an integral part of the CometChat UI UI Kit, extending the ListBase class, which provides the underlying infrastructure for CometChat UI widgets. With its rich set of methods and properties, developers can easily customize and tailor the appearance and behavior of the message information widget to suit the specific requirements of their application.

Android
iOS

CometChatMessageInformation is comprised of the following Base Widgets:

Base Widgets	Description
List Base	This renders common widgets used across `Conversations`, `Groups` & `Users`.

Usage

Integration

You can launch CometChatMessageInformation directly using Navigator.push, or you can define it as a widget within the build method of your State class.

1. Using Navigator to Launch `CometChatMessageInformation`

Dart

Navigator.push(context, MaterialPageRoute(builder: (context) => CometChatMessageInformation())); // Message object is required to launch this widget.

2. Embedding `CometChatMessageInformation` as a Widget in the build Method

Dart

import 'package:cometchat_chat_uikit/cometchat_chat_uikit.dart';
import 'package:flutter/material.dart';

class MessageInformation extends StatefulWidget {
  const MessageInformation({super.key});

  @override
  State<MessageInformation> createState() => _MessageInformationState();
}

class _MessageInformationState extends State<MessageInformation> {

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        body: SafeArea(
            child: CometChatMessageInformation(message: baseMessage) // Message object is required to launch this widget.
        )
    );
  }
}

Actions

Actions dictate how a widget functions. They are divided into two types: Predefined and User-defined. You can override either type, allowing you to tailor the behavior of the widget to fit your specific needs.

1. onClose

The onClose event is typically triggered when the back button is pressed and it carries a default action. However, with the following code snippet, you can effortlessly override this default operation.

Dart

CometChatMessageInformation(
  message: baseMessage!,
  onClose: () {
    // TODO("Not yet implemented")
  },
)

2. onError

This action doesn’t change the behavior of the widget but rather listens for any errors that occur in the MessageList widget.

Dart

CometChatMessageInformation(
  message: baseMessage!,
  onError: (e) {
    // TODO("Not yet implemented")
  },
)

Filters

CometChatMessageInformation widget does not have any available filters.

Events

CometChatMessageInformation widget does not have any available events.

Customization

To fit your app’s design requirements, you can customize the appearance of the CometChatMessageInformation widget. We provide exposed methods that allow you to modify the experience and behavior according to your specific needs.

Style

Using Style you can customize the look and feel of the widget in your app, These parameters typically control elements such as the color, size, shape, and fonts used within the widget.

1. MessageInformation Style

To modify the styling, you can apply the MessageInformationStyle to the CometChatMessageInformation Widget using the messageInformationStyle method.

Dart

CometChatMessageInformation(
  message: baseMessage!,
    messageInformationStyle: `MessageInformationStyle`(
      background: Color(0xFFE4EBF5),
      border: Border.all(width: 1, color: Colors.red),
      titleStyle: const TextStyle(color: Colors.red, fontFamily: "PlaywritePL"),
    )
)

Android
iOS

The following properties are exposed by MessageInformationStyle:

Property	Description	Code
Background	Sets the background color of the message information.	`background: Color?`
Border	Sets the border properties of the message information.	`border: Border?`
Border Radius	Sets the border radius of the message information.	`borderRadius: BorderRadius?`
Close Icon Tint	Sets the tint color for the close icon.	`closeIconTint: Color?`
Delivered Icon Tint	Sets the tint color for the delivered icon.	`deliveredIconTint: Color?`
Divider Tint	Sets the tint color for the divider.	`dividerTint: Color?`
Empty Text Style	Sets the text style for the empty state message.	`emptyTextStyle: TextStyle?`
Error Text Style	Sets the text style for error messages.	`errorTextStyle: TextStyle?`
Gradient	Sets the gradient applied to the message information.	`gradient: Gradient?`
Height	Sets the height of the message information.	`height: double?`
Loading Icon Tint	Sets the tint color for the loading icon.	`loadingIconTint: Color?`
Read Icon Tint	Sets the tint color for the read icon.	`readIconTint: Color?`
Sub Title Style	Sets the text style for the subtitle.	`subTitleStyle: TextStyle?`
Title Style	Sets the text style for the title.	`titleStyle: TextStyle?`
Width	Sets the width of the message information.	`width: double?`

2. ListItem Style

To apply customized styles to the ListItemStyle widget in the CometChatMessageInformation Widget, you can use the following code snippet. For more information, visit List Item Styles.

Dart

CometChatMessageInformation(
    message: baseMessage!,
    listItemStyle: ListItemStyle(
        background: Color(0xFFE4EBF5),
        borderRadius: 20,
        border: Border.all(width: 2),
        margin: EdgeInsets.only(top: 10),
        padding: EdgeInsets.only(left: 10)
    ),
)

Functionality

These are a set of small functional customizations that allow you to fine-tune the overall experience of the widget. With these, you can change text, set custom icons, and toggle the visibility of UI elements.

Dart

CometChatMessageInformation(
  message: baseMessage!,
  title: "Your Title",
  closeIcon: Icon(Icons.close, color: Color(0xFF6851D6)),
  receiptDatePattern: "dd MMM, hh:mm a",
)

Android
iOS

Below is a list of customizations along with corresponding code snippets

Property	Description	Code
Close Icon	Sets the icon for closing the message information.	`closeIcon: Icon?`
Empty State Text	Sets the text for the empty state.	`emptyStateText: String?`
Error State Text	Sets the text for the error state.	`errorStateText: String?`
Loading Icon Url	Sets the URL for the loading icon.	`loadingIconUrl: String?`
Read Icon	Sets the icon for read receipts.	`readIcon: Icon?`
Receipt Date Pattern	Sets the date pattern for the receipt timestamp.	`receiptDatePattern: String?`
Title	Sets the title for the message information.	`title: String?`
Delivered Icon	Sets the icon for delivered receipts.	`deliveredIcon: Icon?`

Advanced

For advanced-level customization, you can set custom widgets to the widget. This lets you tailor each aspect of the widget to fit your exact needs and application aesthetics. You can create and define your widgets and then incorporate those into the widget. With this function, you can assign a custom ListItem to the CometChatMessageInformation Widget.

Dart

CometChatMessageInformation(
  message: baseMessage!,
  listItemView: (message, messageReceipt, context) {
    return Placeholder(); // Replace this placeholder with your custom widget.
  },
)

Example Here is the complete example for reference:

Dart

custom_list_item.dart

import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import '../helper/utils/custom_colors.dart';

class CustomListItems extends StatelessWidget {
  final String name;
  final DateTime? lastMessageTime;
  final String? avatarUrl;

  const CustomListItems({
    super.key,
    required this.name,
    this.lastMessageTime,
    this.avatarUrl,
  });

  String formatDateTime(DateTime dateTime) {
    final now = DateTime.now();
    final difference = now.difference(dateTime);

    if (difference.inDays == 0) {
      return DateFormat('HH:mm').format(dateTime);
    } else if (difference.inDays == 1) {
      return 'Yesterday';
    } else {
      return DateFormat('yyyy-MM-dd').format(dateTime);
    }
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      margin: const EdgeInsets.only(top: 5, bottom: 5),
      padding: const EdgeInsets.all(8.0),
      decoration: BoxDecoration(
        border: Border.all(color: Color(0xFF6851D6), width: 1), // Example border color
        borderRadius: BorderRadius.circular(8.0),
        color: Color(0xFFEEEEEE)
      ),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                Text(
                  name,
                  style: const TextStyle(
                    fontWeight: FontWeight.bold,
                  ),
                ),
                lastMessageTime == null ? Container() : Text(formatDateTime(lastMessageTime!)),
              ],
            ),
          ),
          const SizedBox(width: 8.0),
          if (avatarUrl != null)
            ClipOval(
              child: Image.network(
                avatarUrl!,
                width: 40.0,
                height: 40.0,
                fit: BoxFit.cover,
                errorBuilder: (context, error, stackTrace) {
                  return const Icon(
                    Icons.person,
                    size: 40.0,
                  );
                },
              ),
            )
          else
            const Icon(
              Icons.person,
              size: 40.0,
            ),
        ],
      ),
    );
  }
}

Dart

main.dart

CometChatMessageInformation(
  message: baseMessage!,
  listItemView: (message, messageReceipt, context) {
    return CustomListItems(
      name: message.sender!.name,
      avatarUrl: message.sender!.avatar,
    );
  },
)

Android
iOS

You can customize the subtitle widget for each item to meet your specific preferences and needs.

Dart

CometChatMessageInformation(
  message: baseMessage!,
  subTitleView: (BaseMessage message, MessageReceipt messageReceipt, BuildContext context) {
    return const Row(
      children: [
        Icon(Icons.call, color: Color(0xFF6851D6), size: 25,),
        SizedBox(width: 10),
        Icon(Icons.video_call, color: Color(0xFF6851D6), size: 25,),
      ],
    );
  },
)

Android
iOS

Usage

Integration

1. Using Navigator to Launch `CometChatMessageInformation`

2. Embedding `CometChatMessageInformation` as a Widget in the build Method

Actions

1. onClose

2. onError

Filters

Events

Customization

Style

1. MessageInformation Style

2. ListItem Style

Functionality

Advanced

ListItem Widget

Subtitle Widget

​Usage

​Integration

1. Using Navigator to Launch CometChatMessageInformation

2. Embedding CometChatMessageInformation as a Widget in the build Method

​Actions

1. onClose

2. onError

​Filters

​Events

​Customization

​Style

1. MessageInformation Style

2. ListItem Style

​Functionality

​Advanced

​ListItem Widget

​Subtitle Widget

Usage

Integration

1. Using Navigator to Launch `CometChatMessageInformation`

2. Embedding `CometChatMessageInformation` as a Widget in the build Method

Actions

Filters

Events

Customization

Style

Functionality

Advanced

ListItem Widget

Subtitle Widget