import 'package:flutter/material.dart';
import 'package:flutter_drag_scale/core/drag_scale_widget.dart';
import 'dart:io';

//确认对话框
class CustomDialogFaceReg extends Dialog {
  String title;
  String username;
  String imagePath;
  Size imageSize;

  CustomDialogFaceReg(
      {@required this.username,
      @required this.imagePath,
      @required this.imageSize,
      this.title = ""});

  @override
  Widget build(BuildContext context) {
    Size mediaSize = MediaQuery.of(context).size;
    return WillPopScope(
      child: Material(
        type: MaterialType.transparency,
        child: Container(
          padding: EdgeInsets.only(top: 45),
          alignment: Alignment(0, -1),
          color: Colors.black12,
          child: Container(
            // height: 260,
            // width: 300,
            height: mediaSize.height * 0.9,
            width: mediaSize.width * 0.98,
            //color: Colors.white,  //Cannot provide both a color and a decoration
            decoration: BoxDecoration(
              color: Colors.white,
              border: Border.all(color: Colors.blue, width: 2.0),
              borderRadius: BorderRadius.all(
                Radius.circular(5),
              ),
            ),
            child: Column(
              children: <Widget>[
                Padding(
                  padding: EdgeInsets.fromLTRB(10, 10, 10, 0),
                  child: Stack(
                    children: <Widget>[
                      Align(
                        alignment: Alignment.center,
                        child: Text(
                          title,
                          style: TextStyle(
                            fontSize: 20.0,
                          ),
                        ),
                      ),
                      Align(
                        alignment: Alignment.centerRight,
                        child: InkWell(
                          child: Icon(Icons.close),
                          onTap: () {
                            Navigator.pop(context, false);
                          },
                        ),
                      )
                    ],
                  ),
                ),
                Divider(),
                Container(
                  padding: EdgeInsets.fromLTRB(20, 5, 20, 10),
                  width: double.infinity,
                  height: mediaSize.height * 0.1,
                  child: SingleChildScrollView(
                    child: RichText(
                      text: TextSpan(children: [
                        TextSpan(
                            text: '是否确定为用户 ', style: TextStyle(fontSize: 18.0, color: Colors.blue)),
                        TextSpan(
                            text: username,
                            style: TextStyle(
                                fontSize: 18.0, fontWeight: FontWeight.bold, color: Colors.red)),
                        TextSpan(
                            text: ' 注册或更新以下人脸图片？',
                            style: TextStyle(fontSize: 18.0, color: Colors.blue)),
                      ]),
                    ),
                  ),
                ),
                //SizedBox(height: 10),
                //480*720
                Text('宽高：${imageSize.width}x${imageSize.height}', style: TextStyle(fontSize: 18)),
                SizedBox(height: 5),
                SingleChildScrollView(
                  //滑动的方向 Axis.vertical为垂直方向滑动，Axis.horizontal 为水平方向
                  scrollDirection: Axis.vertical,
                  reverse: false,
                  padding: EdgeInsets.all(0.0),
                  //滑动到底部回弹效果
                  physics: BouncingScrollPhysics(),
                  child: Container(
                    alignment: Alignment(0, 0),
                    height: mediaSize.height * 0.52,
                    width: mediaSize.width * 0.95,
                    decoration: BoxDecoration(
                      border: Border.all(color: Colors.orange, width: 1.0),
                      borderRadius: BorderRadius.circular(5),
                    ),
                    //DragScaleContainer 插件只能放大，不能缩小到比原始尺寸小
                    child: DragScaleContainer(
                        doubleTapStillScale: true,
                        child: Image.file(File(imagePath), fit: BoxFit.fitHeight)),
                  ),
                ),
                SizedBox(height: 10),
                Row(
                  mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                  children: <Widget>[
                    RaisedButton(
                      onPressed: () async {
                        Navigator.pop(context, true); //关闭弹框，返回 true
                      },
                      child: Text("确认"),
                    ),
                    RaisedButton(
                      child: Text("取消"),
                      onPressed: () async {
                        Navigator.pop(context, false); //关闭弹框，返回 false
                      },
                    )
                  ],
                ),
              ],
            ),
          ),
        ),
      ),
      onWillPop: () {
        // 屏蔽点击返回键的操作
        Navigator.pop(context, false);
      },
    );
  }
}