---
id: customize_message_widget
title: Message
---

Customizing Text Messages with the StreamMessageWidget

### Introduction

Every application provides a unique look and feel to their own messaging interface including and not
limited to fonts, colors, and shapes.

This guide details how to customize the `StreamMessageWidget` in the Stream Chat Flutter UI SDK.

### Building Custom Messages

This guide goes into detail about the ability to customize the `StreamMessageWidget`. However, if you want
to customize the default `StreamMessageWidget` in the `StreamMessageListView` provided, you can use the `.copyWith()` method
provided inside the `messageBuilder` parameter of the `StreamMessageListView` like this:

```dart
StreamMessageListView(
    messageBuilder: (context, details, messageList, defaultImpl) {
        return defaultImpl.copyWith(
            ...
        );
    },
),
```

### Theming

You can customize the `StreamMessageWidget` using the `StreamChatTheme` class, so that you can change the
message theme at the top instead of creating your own `StreamMessageWidget` at the lower implementation level.

There are several things you can change in the theme including text styles and colors of various elements.

You can also set a different theme for the user's own messages and messages received by them.

:::note
Theming allows you to change minor factors like style while using the widget directly allows you much
more customization such as replacing a certain widget with another. Some things can only be customized
through the widget and not the theme.
:::

Here is an example:

```dart
StreamChatThemeData(

  /// Sets theme for user's messages
  ownMessageTheme: StreamMessageThemeData(
    messageBackgroundColor: colorTheme.textHighEmphasis,
  ),

  /// Sets theme for received messages
  otherMessageTheme: StreamMessageThemeData(
    avatarTheme: StreamAvatarThemeData(
      borderRadius: BorderRadius.circular(8),
    ),
  ),

)
```

![](../../assets/message_theming.png)

#### Change message text style

The `StreamMessageWidget` has multiple `Text` widgets that you can manipulate the styles of. The three main
are the actual message text, user name, message links, and the message timestamp.

```dart
StreamMessageThemeData(
  messageTextStyle: TextStyle(...),
  createdAtStyle: TextStyle(...),
  messageAuthorStyle: TextStyle(...),
  messageLinksStyle: TextStyle(...),
)
```

![](../../assets/message_styles.png)

#### Change avatar theme

You can change the attributes of the avatar (if displayed) using the `avatarTheme` property.

```dart
StreamMessageThemeData(
    avatarTheme: StreamAvatarThemeData(
      borderRadius: BorderRadius.circular(8),
    ),
)
```

![](../../assets/message_rounded_avatar.png)

#### Changing Reaction theme

You also customize the reactions attached to every message using the theme.

```dart
StreamMessageThemeData(
  reactionsBackgroundColor: Colors.red,
  reactionsBorderColor: Colors.redAccent,
  reactionsMaskColor: Colors.pink,
),
```

![](../../assets/message_reaction_theming.png)

### Changing Message Actions

When a message is long pressed, the `StreamMessageActionsModal` is shown.

The `StreamMessageWidget` allows showing or hiding some options if you so choose.

```dart
StreamMessageWidget(
    ...
    showUsername = true,
    showTimestamp = true,
    showReactions = true,
    showDeleteMessage = true,
    showEditMessage = true,
    showReplyMessage = true,
    showThreadReplyMessage = true,
    showResendMessage = true,
    showCopyMessage = true,
    showFlagButton = true,
    showPinButton = true,
    showPinHighlight = true,
),
```

![](../../assets/message_widget_actions.png)

### Building attachments

The `customAttachmentBuilders` property allows you to build any kind of attachment (inbuilt or custom)
in your own way. While a separate guide is written for this, it is included here because of relevance.

```dart
StreamMessageListView(
  messageBuilder: (context, details, messages, defaultMessage) {
    return defaultMessage.copyWith(
        customAttachmentBuilders: {
          'location': (context, message, attachments) {
            final attachmentWidget = Image.network(
              _buildMapAttachment(
                attachments[0].extraData['latitude'],
                attachments[0].extraData['longitude'],
              ),
            );

            return WrapAttachmentWidget(
              attachmentWidget: attachmentWidget, 
              attachmentShape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
            );
          }
        },
    );
  },
),
```

### Widget Builders

Some parameters allow you to construct your own widget in place of some elements in the `StreamMessageWidget`.

These are:
* `userAvatarBuilder`  : Allows user to substitute their own widget in place of the user avatar.
* `editMessageInputBuilder` : Allows user to substitute their own widget in place of the input in edit mode.
* `textBuilder` : Allows user to substitute their own widget in place of the text.
* `bottomRowBuilder` : Allows user to substitute their own widget in the bottom of the message when not deleted.
* `deletedBottomRowBuilder` : Allows user to substitute their own widget in the bottom of the message when deleted.

```dart
StreamMessageWidget(
    ...
    textBuilder: (context, message) {
        // Add your own text implementation here.
    },
),
```