flutter_shake_container

A lightweight, configurable shake animation widget for Flutter.
Supports any Flutter widget.

This README documents the exact usage patterns shown in example/main.dart, including ValueNotifier, GetX, and Stream based triggers, each demonstrated with horizontal, vertical, and both-axis shake directions.

✨ Features

Preset shake styles: error / warning / subtle
Fully customizable animation via ShakeConfig
Supports horizontal / vertical / both-axis shaking
Queue-based triggering (no interrupted animations)
Unified trigger abstraction (ValueNotifier / Stream / GetX)
Text and generic widget support
onShakeStart callback for haptic / vibration integration
Zero external dependencies

📦 Installation

dependencies:
  flutter_shake_container: ^1.1.3

📥 Import

import 'package:flutter_shake_container/flutter_shake_container.dart';

📸 Demo Preview

flutter_shake_container demo

🔧 Properties

ShakeContainer

Property	Type	Description
`trigger`	`ShakeTrigger`	The trigger that starts the shake animation. Each `ShakeContainer` should have its own trigger.
`config`	`ShakeConfig`	Defines the shake animation (offsets, weights, axis, curve, duration).
`child`	`Widget`	The widget to be shaken. Supports any Flutter widget.
`onShakeStart`	`VoidCallback?`	Called when the shake animation actually starts. Useful for haptic feedback or vibration.

ShakeText

Property	Type	Description
`text`	`ValueListenable<String>`	The text content to display and observe. A shake is triggered when the value becomes non-empty.
`config`	`ShakeConfig`	Shake animation configuration.
`style`	`TextStyle?`	Text style applied to the text widget.
`autoDismiss`	`Duration?`	Automatically clears the text after the given duration.
`onAutoDismiss`	`VoidCallback?`	Called when `autoDismiss` completes.
`hideWhenEmpty`	`bool`	Whether to hide the widget when the text is empty. Defaults to `true`.
`onShakeStart`	`VoidCallback?`	Called when the shake animation starts. Can be used for haptic feedback.

ShakeConfig

Property	Type	Description
`offsets`	`List<double>`	The offset values used to build the shake motion.
`weights`	`List<double>`	The weight for each shake segment. Must be `offsets.length - 1`.
`axis`	`ShakeAxis`	The shake direction: `horizontal`, `vertical`, or `both`.
`curve`	`Curve`	Animation curve. Defaults to `Curves.easeOut`.
`duration`	`Duration`	Total duration of the shake animation.

ShakeTrigger

ShakeTrigger is an abstraction over different trigger mechanisms.

Provided implementations:

StreamShakeTrigger – Triggered by a Stream event
Internal trigger for ShakeText (ValueListenable-based)

Each `ShakeContainer` should use its own trigger.

🧪 Example Usage

The following examples are copied and directly from example/main.dart.

✏️ ShakeText — ValueNotifier

Horizontal

final errorH = ValueNotifier('');

ShakeText(
  text: errorH,
  config: ShakePreset.error,
  style: const TextStyle(color: Colors.red),
  autoDismiss: const Duration(seconds: 2),
  onAutoDismiss: () => errorH.value = '',
  onShakeStart: () {
    print('Shaken by ValueNotifier: Horizontal');
  },
);

errorH.value = 'Horizontal shake';

Vertical

final errorV = ValueNotifier('');

ShakeText(
  text: errorV,
  config: ShakeConfig(
    offsets: [0, -10, 10, -10, 10, 0],
    weights: [1, 1, 1, 1, 1],
    axis: ShakeAxis.vertical,
  ),
  style: const TextStyle(color: Colors.orange),
  autoDismiss: const Duration(seconds: 3),
  onAutoDismiss: () => errorV.value = '',
  onShakeStart: () {
    print('Shaken by ValueNotifier: Vertical');
  },
);

errorV.value = 'Vertical shake';

Both Axis

final errorB = ValueNotifier('');

ShakeText(
  text: errorB,
  config: ShakeConfig(
    offsets: [0, -8, 8, -8, 8, 0],
    weights: [1, 1, 1, 1, 1],
    axis: ShakeAxis.both,
  ),
  style: const TextStyle(color: Colors.purple),
  autoDismiss: const Duration(milliseconds: 1200),
  onAutoDismiss: () => errorB.value = '',
  onShakeStart: () {
    print('Shaken by ValueNotifier: Both');
  },
);

errorB.value = 'Both-axis shake';

🟢 ShakeContainer — GetX

Each direction uses an independent trigger stream.

Horizontal

ShakeContainer(
  trigger: triggerGetxH,
  config: ShakePreset.error,
  onShakeStart: () {
    print('Shaken by GetX: Horizontal');
  },
  child: const Icon(Icons.access_alarm, color: Colors.orange),
);

demo.triggerHorizontal();

Vertical

ShakeContainer(
  trigger: triggerGetxV,
  config: ShakeConfig(
    offsets: [0, -10, 10, -10, 10, 0],
    weights: [1, 1, 1, 1, 1],
    axis: ShakeAxis.vertical,
  ),
  onShakeStart: () {
    print('Shaken by GetX: Vertical');
  },
  child: const Icon(Icons.accessibility_sharp, color: Colors.deepOrange),
);

demo.triggerVertical();

Both Axis

ShakeContainer(
  trigger: triggerGetxB,
  config: ShakeConfig(
    offsets: [0, -8, 8, -8, 8, 0],
    weights: [1, 1, 1, 1, 1],
    axis: ShakeAxis.both,
  ),
  onShakeStart: () {
    print('Shaken by GetX: Both');
  },
  child: const Icon(Icons.access_alarm, color: Colors.purple),
);

demo.triggerBoth();

🔄 ShakeContainer — Stream

Each direction uses its own StreamController.

Horizontal

ShakeContainer(
  trigger: triggerStreamH,
  config: ShakePreset.error,
  onShakeStart: () {
    print('Shaken by Stream: Horizontal');
  },
  child: const Text('Horizontal shake'),
);

streamH.add(null);

Vertical

ShakeContainer(
  trigger: triggerStreamV,
  config: ShakeConfig(
    offsets: [0, -10, 10, -10, 10, 0],
    weights: [1, 1, 1, 1, 1],
    axis: ShakeAxis.vertical,
  ),
  onShakeStart: () {
    print('Shaken by Stream: Vertical');
  },
  child: const Text('Vertical shake'),
);

streamV.add(null);

Both Axis

ShakeContainer(
  trigger: triggerStreamB,
  config: ShakeConfig(
    offsets: [0, -8, 8, -8, 8, 0],
    weights: [1, 1, 1, 1, 1],
    axis: ShakeAxis.both,
  ),
  onShakeStart: () {
    print('Shaken by Stream: Both');
  },
  child: const Text('Both-axis shake'),
);

streamB.add(null);

📄 License

MIT License

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

flutter_shake_container

✨ Features

📦 Installation

📥 Import

📸 Demo Preview

🔧 Properties

ShakeContainer

ShakeText

ShakeConfig

ShakeTrigger

Each `ShakeContainer` should use its own trigger.

🧪 Example Usage

✏️ ShakeText — ValueNotifier

Horizontal

Vertical

Both Axis

🟢 ShakeContainer — GetX

Horizontal

Vertical

Both Axis

🔄 ShakeContainer — Stream

Horizontal

Vertical

Both Axis

📄 License

Libraries

flutter_shake_container package

flutter_shake_container

✨ Features

📦 Installation

📥 Import

📸 Demo Preview

🔧 Properties

ShakeContainer

ShakeText

ShakeConfig

ShakeTrigger

Each ShakeContainer should use its own trigger.

🧪 Example Usage

✏️ ShakeText — ValueNotifier

Horizontal

Vertical

Both Axis

🟢 ShakeContainer — GetX

Horizontal

Vertical

Both Axis

🔄 ShakeContainer — Stream

Horizontal

Vertical

Both Axis

📄 License

Libraries

flutter_shake_container package

Each `ShakeContainer` should use its own trigger.