import 'package:cpnav/pages/pass_track/view.dart';
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:get/get.dart';

import 'aimPointer.dart';

final SightController controller = Get.put(SightController());

class SightGview extends GetView<SightController> {
  const SightGview({super.key});

  @override
  Widget build(BuildContext context) {
    final Size size = MediaQuery.of(context).size;

    return Obx(() => Positioned(
        left: controller.sightOffset.value.dx,
        top: controller.sightOffset.value.dy,
        width: size.width / 5 * 1.5,
        height: size.width / 5 * 1.5,
        child: GestureDetector(
            onScaleStart: (details) {
              // 正确计算初始偏移量：当前手指位置与卡片当前位置之间的差值
              controller.sightInit.value =
                  details.localFocalPoint - controller.sightOffset.value;
            },
            onScaleUpdate: (details) {
              // 使用初始偏移量来更新卡片的位置
              controller.sightOffset.value =
                  details.localFocalPoint - controller.sightInit.value;
            },
            child: Visibility(
                visible: mapcontroller.isCardVisible.value, // 控制可见性
                child: Container(
                  decoration: const BoxDecoration(color: Colors.transparent),
                  child: Stack(children: [
                    const Card(
                      elevation: 5.0,
                      child: SightView(),
                    ),
                    Positioned(
                      right: 0,
                      top: 0,
                      child: IconButton(
                        icon: const Icon(Icons.close),
                        onPressed: () {
                          // 关闭按钮的回调函数
                          mapcontroller.isCardVisible.value = false;
                        },
                      ),
                    ),
                  ]),
                )))));
  }
}