Customizable Material and Cupertino buttons with progress indicators and more

/// The widget that's used as the progress indicator.
/// You can substitute it with your own progress indicator if necessary.
/// See [defaultMaterialProgressIndicatorBuilder] and[defaultCupertinoProgressIndicatorBuilder] for more info.
final WidgetBuilder progressIndicatorBuilder;

/// The location of progress indicator.
/// See [ProgressIndicatorLocation] for more info.
final ProgressIndicatorLocation progressIndicatorLocation;

/// Whether to show the result of the Future.
/// Will show [successIndicatorBuilder] if Future completes without errors.
/// Otherwise, will show [failureIndicatorBuilder].
final bool showResult;

/// Whether to animate the transitions using [AnimatedSwitcher].
/// Defaults to [true].
final bool animateTransitions;

/// Indicator to show when the Future is completed successfully.
/// Defaults to [defaultSuccessResultIndicatorBuilder].
final WidgetBuilder successIndicatorBuilder;

/// Indicator to show when the Future fails.
/// Defaults to [defaultFailureResultIndicatorBuilder].
final WidgetBuilder failureIndicatorBuilder;

/// For how long should the result be shown for.
/// Default to `Duration(seconds: 2)`.
final Duration resultIndicatorDuration;

/// Curve that's used to animate the button size.
/// Defaults to [Curves.easeInOut].
final Curve animationCurve;

/// Duration that's used to animate the button size.
/// Defaults to `Duration(milliseconds: 150)`.
final Duration animationDuration;

FutureRaisedButton.icon(
  icon: Icon(Icons.star),
  label: Text('Star'),
  onPressed: () async {
    // Do some background task
    await Future.delayed(Duration(seconds: 5));
  },
);

dependencies:
  future_button: ^0.1.1

$ flutter pub get

import 'package:future_button/future_button.dart';