hi-client/lib/app/widgets/hi_edge_swipe_detector.dart

import 'dart:math';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'swipe/swipe_controller.dart';
import 'swipe/swipe_config.dart';
import 'package:kaer_with_panels/app/utils/kr_log_util.dart';

class HIEdgeSwipeDetector extends StatefulWidget {
  final Widget child;
  final double reservedEdgeWidth;
  final double detectionEdgeWidth;
  final double minSwipeDistance;
  final double minSwipeVelocity;
  final SwipeConfig? config;
  const HIEdgeSwipeDetector(
      {super.key,
      required this.child,
      this.reservedEdgeWidth = 0,
      this.detectionEdgeWidth = 20,
      this.minSwipeDistance = 20,
      this.minSwipeVelocity = 300,
      this.config});
  @override
  State<HIEdgeSwipeDetector> createState() => _HIEdgeSwipeDetectorState();
}

class _HIEdgeSwipeDetectorState extends State<HIEdgeSwipeDetector> {
  Offset? _start;
  Offset? _last;
  DateTime? _startTime;
  final SwipeController _controller =
      Get.put(SwipeController(), permanent: true);
  bool _fromLeft = false;
  bool _fromRight = false;
  @override
  Widget build(BuildContext context) {
    KRLogUtil.kr_d('HIEdgeSwipeDetector build');
    return Stack(
      fit: StackFit.expand,
      children: [
        widget.child,
        Positioned(
          left: 0,
          top: 0,
          bottom: 0,
          width: widget.detectionEdgeWidth,
          child: GestureDetector(
            behavior: HitTestBehavior.opaque,
            onHorizontalDragStart: (details) {
              _fromLeft = true;
              _fromRight = false;
              _start = details.globalPosition;
              _startTime = DateTime.now();
              KRLogUtil.kr_d('dragStart LEFT x=${details.globalPosition.dx}',
                  tag: 'HIEdgeSwipeDetector');
            },
            onHorizontalDragUpdate: (details) {
              _last = details.globalPosition;
              KRLogUtil.kr_d('dragUpdate LEFT dx=${details.delta.dx}',
                  tag: 'HIEdgeSwipeDetector');
            },
            onHorizontalDragEnd: (details) {
              if (_start == null || _startTime == null) return;
              final durationMs =
                  DateTime.now().difference(_startTime!).inMilliseconds;
              final velocity = details.velocity.pixelsPerSecond.dx.abs();
              final distance = _last != null ? (_last!.dx - _start!.dx) : 0.0;
              final okByVelocity = velocity >= widget.minSwipeVelocity;
              final okByDistance = distance.abs() >= widget.minSwipeDistance;
              KRLogUtil.kr_d(
                  'dragEnd LEFT vel=${details.velocity.pixelsPerSecond.dx} dur=$durationMs dist=$distance okV=$okByVelocity okD=$okByDistance',
                  tag: 'HIEdgeSwipeDetector');
              if (!okByVelocity && !okByDistance) {
                _reset();
                return;
              }
              if (distance > 0) {
                final cfg = widget.config;
                if (cfg == null || !cfg.enableLeft) {
                  _reset();
                  return;
                }
                if (cfg.onLeft != null) {
                  cfg.onLeft!();
                } else {
                  Get.back();
                }
              }
              _reset();
            },
          ),
        ),
        Positioned(
          right: 0,
          top: 0,
          bottom: 0,
          width: widget.detectionEdgeWidth,
          child: GestureDetector(
            behavior: HitTestBehavior.opaque,
            onHorizontalDragStart: (details) {
              _fromLeft = false;
              _fromRight = true;
              _start = details.globalPosition;
              _startTime = DateTime.now();
              KRLogUtil.kr_d('dragStart RIGHT x=${details.globalPosition.dx}',
                  tag: 'HIEdgeSwipeDetector');
            },
            onHorizontalDragUpdate: (details) {
              _last = details.globalPosition;
              KRLogUtil.kr_d('dragUpdate RIGHT dx=${details.delta.dx}',
                  tag: 'HIEdgeSwipeDetector');
            },
            onHorizontalDragEnd: (details) {
              if (_start == null || _startTime == null) return;
              final durationMs =
                  DateTime.now().difference(_startTime!).inMilliseconds;
              final velocity = details.velocity.pixelsPerSecond.dx.abs();
              final distance = _last != null ? (_last!.dx - _start!.dx) : 0.0;
              final okByVelocity = velocity >= widget.minSwipeVelocity;
              final okByDistance = distance.abs() >= widget.minSwipeDistance;
              KRLogUtil.kr_d(
                  'dragEnd RIGHT vel=${details.velocity.pixelsPerSecond.dx} dur=$durationMs dist=$distance okV=$okByVelocity okD=$okByDistance',
                  tag: 'HIEdgeSwipeDetector');
              if (!okByVelocity && !okByDistance) {
                _reset();
                return;
              }
              if (distance < 0) {
                final cfg = widget.config;
                if (cfg == null || !cfg.enableRight) {
                  _reset();
                  return;
                }
                if (cfg.onRight != null) {
                  cfg.onRight!();
                } else {
                  _controller.openRightMenu();
                }
              }
              _reset();
            },
          ),
        ),
      ],
    );
  }

  void _reset() {
    _start = null;
    _last = null;
    _startTime = null;
    _fromLeft = false;
    _fromRight = false;
  }
}