AI-Health/health_app/lib/widgets/common_widgets.dart

import 'package:flutter/material.dart';

import '../core/app_colors.dart';

class SwipeDeleteTile extends StatefulWidget {
  final Widget child;
  final VoidCallback onDelete;
  final VoidCallback? onTap;
  final EdgeInsetsGeometry margin;

  const SwipeDeleteTile({
    super.key,
    required this.child,
    required this.onDelete,
    this.onTap,
    this.margin = const EdgeInsets.symmetric(horizontal: 16, vertical: 4),
  });

  @override
  State<SwipeDeleteTile> createState() => _SwipeDeleteTileState();
}

class _SwipeDeleteTileState extends State<SwipeDeleteTile>
    with SingleTickerProviderStateMixin {
  double _dx = 0;
  static const _maxSlide = 80.0;
  static const _threshold = 24.0;

  void _onDragUpdate(DragUpdateDetails d) {
    setState(() => _dx = (_dx + d.delta.dx).clamp(-_maxSlide, 0.0));
  }

  void _onDragEnd(DragEndDetails d) {
    setState(() => _dx = _dx < -_threshold ? -_maxSlide : 0);
  }

  @override
  Widget build(BuildContext context) {
    final isSwiped = _dx < 0;
    return Padding(
      padding: widget.margin,
      child: Stack(
        children: [
          Positioned.fill(
            child: Container(
              decoration: BoxDecoration(
                color: AppColors.error,
                borderRadius: BorderRadius.circular(16),
              ),
              child: const Align(
                alignment: Alignment.centerRight,
                child: Padding(
                  padding: EdgeInsets.only(right: 20),
                  child: Icon(
                    Icons.delete_outline,
                    color: AppColors.textOnGradient,
                    size: 28,
                  ),
                ),
              ),
            ),
          ),
          GestureDetector(
            behavior: isSwiped
                ? HitTestBehavior.opaque
                : HitTestBehavior.deferToChild,
            onTap: isSwiped
                ? () {
                    widget.onDelete();
                    setState(() => _dx = 0);
                  }
                : widget.onTap,
            onHorizontalDragUpdate: _onDragUpdate,
            onHorizontalDragEnd: _onDragEnd,
            child: Transform.translate(
              offset: Offset(_dx, 0),
              child: isSwiped
                  ? AbsorbPointer(absorbing: true, child: widget.child)
                  : widget.child,
            ),
          ),
        ],
      ),
    );
  }
}