Animated Slide Switcher #

animated_slide_switcher is a Flutter package that provides customizable animated slide switching with ease. The widget switches its child on value change with slide-up and slide-down animations, and you can customize the animation behavior based on your needs.

Features #

• Customizable Slide Animations: Animate from top-to-bottom (upToDown) or bottom-to-top (downToUp).
• Value-Based Animations: The widget animates based on the value passed to it, making it easy to use with any type.
• Smooth Transition Effects: Supports customizable durations for both incoming and outgoing animations.
• Flexible Widget: Works with any value type, making it a versatile solution for dynamic UI updates.

Getting started #

To use this package, add it to your pubspec.yaml file:

dependencies:
  animated_slide_switcher: ^0.1.0 # Check for the latest version on pub.flutter-io.cn

Then, run flutter pub get to install the package

Demonstrations #

Usage #

Here’s an example of how to use the AnimatedSlideSwitcher widget:

import 'package:flutter/material.dart';
import 'package:animated_slide_switcher/animated_slide_switcher.dart';

class CounterApp extends StatefulWidget {
  @override
  _CounterAppState createState() => _CounterAppState();
}

class _CounterAppState extends State<CounterApp> {
  int _counter = 0;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(title: Text('Animated Slide Switcher')),
        body: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            AnimatedSlideSwitcher<int>(
              value: _counter,
              builder: (context, value) => Text(
                '$value',
                style: TextStyle(fontSize: 50),
              ),
              direction: AnimationDirection.upToDown,
              incomingDuration: Duration(milliseconds: 500),
              outgoingDuration: Duration(milliseconds: 150),
            ),
            SizedBox(height: 20),
            ElevatedButton(
              onPressed: () =>setState(() =>_counter++),
              child: Text('Increment'),
            ),
          ],
        ),
    );
  }
}

Parameters #

• value: The value that triggers the animation when changed.
• builder: A function that returns the widget to be displayed based on the current value.
• direction: The direction of the slide animation. (upToDown or downToUp).
• incomingDuration: The duration for the incoming animation.
• outgoingDuration: The duration for the outgoing animation.

Custom Animation Directions #

You can also provide a custom direction based on the previous and current values using the predicateDirection parameter:

AnimatedSlideSwitcher<int>(
  value: _counter,
  builder: (context, value) => Text('$value'),
  predicateDirection: (oldValue, newValue) {
    return newValue > oldValue ? AnimationDirection.downToUp : AnimationDirection.upToDown;
  },
)

Contribution #

Feel free to contribute by opening issues or submitting pull requests.

License #

This package is open-source and available under the MIT License.