import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:wallpaper/models/imgnetodel.dart';

import 'package:photo_view/photo_view.dart';
import 'package:photo_view/photo_view_gallery.dart';


class ImgScanPageView extends GetView {
  final NetImgCategory dataModel;
  final int currentIndex;

  const ImgScanPageView({super.key,required this.dataModel,required this.currentIndex});

  @override 
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text("查看大图"),
      ),
      body: Stack(
        children: [
          Container(
              child: PhotoViewGallery.builder(
                    scrollPhysics: const BouncingScrollPhysics(),
                    builder: (BuildContext context, int index) {
                      return PhotoViewGalleryPageOptions(
                        imageProvider: NetworkImage(dataModel.data![index].original!),
                        initialScale: PhotoViewComputedScale.contained * 0.8,
                        minScale: PhotoViewComputedScale.contained*0.4,
                        maxScale: PhotoViewComputedScale.contained * 4,
                        onTapDown: (context, details, controllerValue) {
                          print("touch down...");
                        },
                        // heroAttributes: PhotoViewHeroAttributes(tag: galleryItems[index].id),
                      );
                    },
                    itemCount: dataModel.data!.length,
                    loadingBuilder: (context, event) => Center(
                      child: Container(
                        width: 20.0,
                        height: 20.0,
                        child: CircularProgressIndicator(
                          value: event == null
                              ? 0
                              : event.cumulativeBytesLoaded / event.expectedTotalBytes!,
                        ),
                      ),
                    ),
                    // backgroundDecoration: widget.backgroundDecoration,
                    // pageController: widget.pageController,
                    onPageChanged: onPageChanged,
                    

              )
          ),
          Align(
              alignment: Alignment.bottomCenter,
              child: SizedBox(
                height: 90,
                 width: 90,
                child: IconButton(onPressed: (){
                          // print("download.....");
                        }, 
                        icon: const Icon(Icons.download),
                        color: Colors.white,
                      ),
              ),
          ),
        ],
      ),
    );
  }

  void onPageChanged(int index){
    print("切换了图片....");
  }
}