ButtonStyle class

The visual properties that most buttons have in common.

Buttons and their themes have a ButtonStyle property which defines the visual properties whose default values are to be overridden. The default values are defined by the individual button widgets and are typically based on overall theme's ThemeData.colorScheme and ThemeData.textTheme.

All of the ButtonStyle properties are null by default.

Many of the ButtonStyle properties are MaterialStateProperty objects which resolve to different values depending on the button's state. For example the Color properties are defined with MaterialStateProperty<Color> and can resolve to different colors depending on if the button is pressed, hovered, focused, disabled, etc.

These properties can override the default value for just one state or all of them. For example to create a ElevatedButton whose background color is the color scheme’s primary color with 50% opacity, but only when the button is pressed, one could write:

ElevatedButton(
  style: ButtonStyle(
    backgroundColor: MaterialStateProperty.resolveWith<Color?>(
      (Set<MaterialState> states) {
        if (states.contains(MaterialState.pressed)) {
          return Theme.of(context).colorScheme.primary.withOpacity(0.5);
        }
        return null; // Use the component's default.
      },
    ),
  ),
  child: const Text('Fly me to the moon'),
  onPressed: () {
    // ...
  },
),

In this case the background color for all other button states would fallback to the ElevatedButton’s default values. To unconditionally set the button's backgroundColor for all states one could write:

ElevatedButton(
  style: const ButtonStyle(
    backgroundColor: MaterialStatePropertyAll<Color>(Colors.green),
  ),
  child: const Text('Let me play among the stars'),
  onPressed: () {
    // ...
  },
),

Configuring a ButtonStyle directly makes it possible to very precisely control the button’s visual attributes for all states. This level of control is typically required when a custom “branded” look and feel is desirable. However, in many cases it’s useful to make relatively sweeping changes based on a few initial parameters with simple values. The button styleFrom() methods enable such sweeping changes. See for example: ElevatedButton.styleFrom, FilledButton.styleFrom, OutlinedButton.styleFrom, TextButton.styleFrom.

For example, to override the default text and icon colors for a TextButton, as well as its overlay color, with all of the standard opacity adjustments for the pressed, focused, and hovered states, one could write:

TextButton(
  style: TextButton.styleFrom(foregroundColor: Colors.green),
  child: const Text('Let me see what spring is like'),
  onPressed: () {
    // ...
  },
),

To configure all of the application's text buttons in the same way, specify the overall theme's textButtonTheme:

MaterialApp(
  theme: ThemeData(
    textButtonTheme: TextButtonThemeData(
      style: TextButton.styleFrom(foregroundColor: Colors.green),
    ),
  ),
  home: const MyAppHome(),
),

Material 3 button types

Material Design 3 specifies five types of common buttons. Flutter provides support for these using the following button classes:

See also:

• ElevatedButtonTheme, the theme for ElevatedButtons.
• FilledButtonTheme, the theme for FilledButtons.
• OutlinedButtonTheme, the theme for OutlinedButtons.
• TextButtonTheme, the theme for TextButtons.