packages/flutter/lib/src/services/haptic_feedback.dart

// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.


import 'system_channels.dart';

/// Allows access to the haptic feedback interface on the device.
///
/// This API is intentionally terse since it calls default platform behavior. It
/// is not suitable for precise control of the system's haptic feedback module.
class HapticFeedback {
  // This class is not meant to be instantiated or extended; this constructor
  // prevents instantiation and extension.
  HapticFeedback._();

  /// Provides vibration haptic feedback to the user for a short duration.
  ///
  /// On iOS devices that support haptic feedback, this uses the default system
  /// vibration value (`kSystemSoundID_Vibrate`).
  ///
  /// On Android, this uses the platform haptic feedback API to simulate a
  /// response to a long press (`HapticFeedbackConstants.LONG_PRESS`).
  static Future<void> vibrate() async {
    await SystemChannels.platform.invokeMethod<void>('HapticFeedback.vibrate');
  }

  /// Provides a haptic feedback corresponding a collision impact with a light mass.
  ///
  /// On iOS versions 10 and above, this uses a `UIImpactFeedbackGenerator` with
  /// `UIImpactFeedbackStyleLight`. This call has no effects on iOS versions
  /// below 10.
  ///
  /// On Android, this uses `HapticFeedbackConstants.VIRTUAL_KEY`.
  static Future<void> lightImpact() async {
    await SystemChannels.platform.invokeMethod<void>(
      'HapticFeedback.vibrate',
      'HapticFeedbackType.lightImpact',
    );
  }

  /// Provides a haptic feedback corresponding a collision impact with a medium mass.
  ///
  /// On iOS versions 10 and above, this uses a `UIImpactFeedbackGenerator` with
  /// `UIImpactFeedbackStyleMedium`. This call has no effects on iOS versions
  /// below 10.
  ///
  /// On Android, this uses `HapticFeedbackConstants.KEYBOARD_TAP`.
  static Future<void> mediumImpact() async {
    await SystemChannels.platform.invokeMethod<void>(
      'HapticFeedback.vibrate',
      'HapticFeedbackType.mediumImpact',
    );
  }

  /// Provides a haptic feedback corresponding a collision impact with a heavy mass.
  ///
  /// On iOS versions 10 and above, this uses a `UIImpactFeedbackGenerator` with
  /// `UIImpactFeedbackStyleHeavy`. This call has no effects on iOS versions
  /// below 10.
  ///
  /// On Android, this uses `HapticFeedbackConstants.CONTEXT_CLICK` on API levels
  /// 23 and above. This call has no effects on Android API levels below 23.
  static Future<void> heavyImpact() async {
    await SystemChannels.platform.invokeMethod<void>(
      'HapticFeedback.vibrate',
      'HapticFeedbackType.heavyImpact',
    );
  }

  /// Provides a haptic feedback indication selection changing through discrete values.
  ///
  /// On iOS versions 10 and above, this uses a `UISelectionFeedbackGenerator`.
  /// This call has no effects on iOS versions below 10.
  ///
  /// On Android, this uses `HapticFeedbackConstants.CLOCK_TICK`.
  static Future<void> selectionClick() async {
    await SystemChannels.platform.invokeMethod<void>(
      'HapticFeedback.vibrate',
      'HapticFeedbackType.selectionClick',
    );
  }
}