Custom AppDialog

custom_app_dialog.dart

import 'package:flutter/material.dart';

class CustomDialogTransition extends PageRouteBuilder {
  CustomDialogTransition({
    required super.pageBuilder,
    super.fullscreenDialog = true,
    bool opaque = true,
    bool barrierDismissible = true,
    Color? barrierColor,
    Duration transitionDuration = const Duration(milliseconds: 600),
    Duration reverseTransitionDuration = Duration.zero,
    Curve curve = Curves.ease,
  })  : _opaque = opaque,
        _barrierDismissible = barrierDismissible,
        _barrierColor = barrierColor ?? Colors.black54,
        _transitionDuration = transitionDuration,
        _reverseTransitionDuration = reverseTransitionDuration;

  final bool _opaque;
  final bool _barrierDismissible;
  final Color _barrierColor;
  final Duration _transitionDuration;
  final Duration _reverseTransitionDuration;
  final Curve _curve;

  @override
  bool get opaque => _opaque;

  @override
  bool get barrierDismissible => _barrierDismissible;

  @override
  Color get barrierColor => _barrierColor;

  @override
  Duration get transitionDuration => _transitionDuration;

  @override
  Duration get reverseTransitionDuration => _reverseTransitionDuration;

  @override
  Widget buildTransitions(
    BuildContext context,
    Animation<double> animation,
    Animation<double> secondaryAnimation,
    Widget child,
  ) {
    return ScaleTransition(
      scale: CurvedAnimation(parent: animation, curve: _curve),
      child: child,
    );
  }
}




class SpringCurve extends Curve {
  const SpringCurve([this.period = 0.4]);

  final double period;

  @override
  double transformInternal(double t) {
    final double s = period / 2.0;
    const bounceDistance = -18.0;
    const bounciness = 2.0;
    const stiffness = 1.4;

    return pow(bounciness, bounceDistance * t) * sin((t - s) * (pi * stiffness) / period) + 1.0;
  }

  @override
  String toString() {
    return '${objectRuntimeType(this, 'ElasticOutCurve')}($period)';
  }
}