logistics-client-flutter/lib/pages/order_taking_page.dart

import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:url_launcher/url_launcher.dart';
import '../util/api.dart';
import '../util/models.dart';
import '../showDialog.dart';
import '../util/session.dart';
import '../util/util.dart';
import '../showAlert.dart';
import 'package:barcode_scan/barcode_scan.dart';
import 'package:flutter/services.dart';
import 'order_management_page/order_detail_page.dart';

class OrderTakingPage extends StatefulWidget {

  OrderTakingPage({
    Key key
  }): super(key: key);

  _OrderTakingPageState createState() => _OrderTakingPageState();
}

class _OrderTakingPageState extends State < OrderTakingPage > with AutomaticKeepAliveClientMixin {

  ScrollController _scrollController = ScrollController(); //初始化滚动轴监控对象
  List < OrderList > orderList = []; //订单列表
  bool hasNextPage = true;
  List lineList = []; //线路列表
  String stationId;
  List < bool > checkStatusList = [];
  bool showLineStatus = true;
  String lineIdStr = '';
  String oldLineIdStr = '';
  int page = 1;
  bool loadMoreOrder = true;
   String barcode = "";//扫描的订单号
  @override
  void initState() {
    super.initState();
    getKey('stationId').then((value) {
      stationId = value;
      getLine().then((childValue) {
        getKey('lineIdStr').then((value) {
          if (value != null) {
            getOrderList(stationId,value, page).then((resp) {
              if (isNotError(context, resp) && this.mounted) {
                setState(() {
                  orderList = OrderListObj.fromJson(resp.data).data.items;
                 
                  hasNextPage = OrderListObj.fromJson(resp.data).data.hasNextPage;
                });
                lineIdStr = value;
              }
            });
          } else {
            getOrderList(stationId,lineIdStr, page).then((resp) {
              if (isNotError(context, resp) && this.mounted) {
                setState(() {
                  orderList = OrderListObj.fromJson(resp.data).data.items;
                  hasNextPage = OrderListObj.fromJson(resp.data).data.hasNextPage;
                });
              }
            });
          }
        });
      });
    });

    _scrollController.addListener(() {
      if (!showLineStatus) {
        setState(() {
          showLineStatus = true;
        });
        switchLine(context);
      }
      if (_scrollController.position.pixels == _scrollController.position.maxScrollExtent) {
        if (hasNextPage && loadMoreOrder) {
          loadMoreOrder = false;
          page = ++page;
          getOrderList(stationId,lineIdStr, page).then((resp) {
            if (isNotError(context, resp) && this.mounted) {
              OrderListObj tempObj = OrderListObj.fromJson(resp.data);
              setState(() {
                orderList.addAll(tempObj.data.items);
                hasNextPage = tempObj.data.hasNextPage;
              });
              loadMoreOrder = true;
            } else {
              loadMoreOrder = true;
            }
          });
        }
      }
    });
  }


  Future getLine() async {
    setState(() {
      lineList.clear();
    });
    await getAllLine().then((resp) {
      if (isNotError(context, resp) && this.mounted) {
        setState(() {
          checkStatusList = [];
          lineList = StationLine.fromJson(resp.data).data;
          LineObj tempLine =LineObj(code:'xxxx',id:-1,name:'未知线路');//创建未知线路
          lineList.add(tempLine);//添加未知线路
          getKey('lineIdStr').then((value) {
            if (value != null) {
              for (int i = 0; i < lineList.length; i++) {
                if (value.indexOf(lineList[i].id.toString()) != -1) {
                  checkStatusList.add(true);
                } else {
                  checkStatusList.add(false);
                }
                if (i < lineList.length - 1) {
                  lineIdStr += lineList[i].id.toString() + ',';
                } else {
                  lineIdStr += lineList[i].id.toString();
                }
              }
            } else {
              for (int i = 0; i < lineList.length; i++) {
                checkStatusList.add(true);
                if (i < lineList.length - 1) {
                  lineIdStr += lineList[i].id.toString() + ',';
                } else {
                  lineIdStr += lineList[i].id.toString();
                }
              }
            }
          });

        });
        return lineIdStr;
      }
    });
  }

  @override
  bool get wantKeepAlive => true;


  @override
  Widget build(BuildContext context) {
    return Container(
      child: Scaffold(
        appBar: AppBar(
          title: Text('接单', style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(36)), ),
          centerTitle: true,
          backgroundColor: Color.fromRGBO(64, 98, 254, 1),
          actions: < Widget > [
            IconButton(icon: Icon(Icons.add_circle_outline),
              onPressed: () {
                setState(() {
                  showLineStatus = !showLineStatus;
                });
                if (!showLineStatus) {
                  getLine();
                } else {
                  switchLine(context);
                }
              }, )
          ]
        ),
        body: Stack(
          children: < Widget > [
            RefreshIndicator(
              onRefresh: _onRefresh, //回调方法
              child: InkWell(
                child: Container(
                  padding: EdgeInsets.fromLTRB(ScreenUtil.getInstance().setWidth(20), ScreenUtil.getInstance().setWidth(20), ScreenUtil.getInstance().setWidth(20), 0),
                  decoration: BoxDecoration(
                    color: Color.fromRGBO(246, 246, 254, 1)
                  ),
                  child: ListView.builder(
                    controller: _scrollController,
                    physics: AlwaysScrollableScrollPhysics(),
                    itemCount: orderList.length + 1,
                    itemBuilder: (BuildContext context, int index) { //itemBuilder实际上就是一个map的循环
                      if (index < orderList.length) {
                        return OrderCardContainer(order: orderList[index], index: index, callback: (val) => deleteOrder(val));
                      }
                      if (hasNextPage) {
                        return _getMoreWidget();
                      } else {
                        return _noMoreWidegt();
                      }
                    },
                  )
                ),
                onTap: () {
                  setState(() {
                    showLineStatus = true;
                  });
                  switchLine(context);
                },
              ),
            ),
            Positioned(
              top: 0,
              right: 0,
              child:
              Offstage(
                offstage: showLineStatus,
                child: Container(
                  width: ScreenUtil.getInstance().setWidth(350),
                  height: ScreenUtil.getInstance().setHeight(500),
                  margin: EdgeInsets.fromLTRB(0, 2, 8, 0),
                  padding: EdgeInsets.fromLTRB(15, 0, 0, 0),
                  decoration: BoxDecoration(
                    color: Color.fromRGBO(76,76,76,1),
                    borderRadius: BorderRadius.all(Radius.circular(4.0)),
                     boxShadow: [ //阴影
                        BoxShadow(
                            color: Colors.black54,
                            offset: Offset(2.0, 2.0),
                            blurRadius: 4.0
                        )
                      ]
                  ),
                  child: lineList.length == 0 ? Center(
                    child: Container(
                      width: ScreenUtil.getInstance().setWidth(50),
                      height: ScreenUtil.getInstance().setHeight(50),
                      child: CircularProgressIndicator(

                      )
                    ),
                  ) :
                  ListView.builder(
                    itemCount: lineList.length,
                    itemBuilder: (BuildContext context, int index) { //itemBuilder实际上就是一个map的循环
                      if (index < lineList.length) {
                        return _lineWidget(lineList[index], index, checkStatusList[index]);
                      }
                    },
                  ),
                ),
              )
            ),
             Positioned(
              right: 20,
              bottom: 20,
              child:Container(
                  width: ScreenUtil.getInstance().setWidth(80),
                  height: ScreenUtil.getInstance().setHeight(80),
                  decoration: BoxDecoration(
                    color: Colors.white,
                    borderRadius: BorderRadius.all(Radius.circular(50)),
                     boxShadow: [ //阴影
                        BoxShadow(
                            color: Colors.black54,
                            offset: Offset(2.0, 2.0),
                            blurRadius: 4.0
                        )
                      ]
                  ),
                  child:IconButton(
                        icon: Image.asset('lib/images/icon_saoyisao.png',
                          width: ScreenUtil.getInstance().setWidth(50),
                          height: ScreenUtil.getInstance().setHeight(48),
                        ),
                        onPressed: () {
                          scan();
                        },
                  )
                ),
              
            )
          ],
        )
      ),
    );
  }

  

  Widget _lineWidget(LineObj lineObj, int index, bool checked) {
    return InkWell(
      child: Container(
        height: ScreenUtil.getInstance().setHeight(80),
        decoration: BoxDecoration(
          border: BorderDirectional(bottom: BorderSide(color: Colors.white, width: 0.1))
        ),
        child: Row(
          children: < Widget > [
            Padding(
              padding: EdgeInsets.fromLTRB(0, 0, 15, 0),
              child: checked ? Image.asset('lib/images/icon_checked.png',
              width: ScreenUtil.getInstance().setWidth(30),
              height:ScreenUtil.getInstance().setWidth(30),
              ) : Icon(Icons.check, color: Color.fromRGBO(255, 255, 255, 0.0, )),
            ),
            Expanded(
              flex: 1,
              child: Container(
                padding: EdgeInsets.only(right: 15),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.end,
                  children: <Widget>[
                     Text(lineObj.name,overflow: TextOverflow.ellipsis, style: TextStyle(color: Colors.white,fontSize:ScreenUtil.getInstance().setSp(30)))
                  ],
                ),
               
              )
            )
          ],
        ),
      ),
      onTap: () {
        setState(() {
          checkStatusList[index] = !checked;
        });
      },
    );
  }

  Widget _getMoreWidget() {
    return Center(
      child: Padding(
        padding: EdgeInsets.all(10.0),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: < Widget > [
            Text(
              '加载中...',
              style: TextStyle(fontSize: 16.0),
            ),
            Container(
              width: ScreenUtil.getInstance().setWidth(50),
              height: ScreenUtil.getInstance().setHeight(50),
              child: CircularProgressIndicator()
            )

          ],
        ),
      ),
    );
  }

  Widget _noMoreWidegt() {
    return Center(
      child: Padding(
        padding: EdgeInsets.all(10.0),
        child: Text(
          '没有更多数据了...',
          style: TextStyle(fontSize: 16.0),
        ),
      ),
    );
  }

  Future _onRefresh() async {
    page = 1;
    print(lineIdStr);
    await getOrderList(stationId,lineIdStr, page).then((resp) {
      if (isNotError(context, resp) && this.mounted) {
        setState(() {
          orderList = OrderListObj.fromJson(resp.data).data.items;
        });
      }
    });
  }

   Future scan() async {
    try {
      String barcode = await BarcodeScanner.scan();
      int index = barcode.indexOf('&');
      if(index!=-1){
        barcode = barcode.substring(index+1);
      }
      Navigator.push(
        context,
        MaterialPageRoute(
          builder: (BuildContext context) {
            return OrderDetailPage(orderNo: barcode,status: '寄件',);
          })
      );
    } on PlatformException catch (e) {
      if (e.code == BarcodeScanner.CameraAccessDenied) {
        setState(() {
          return this.barcode = 'The user did not grant the camera permission!';
        });
      } else {
        setState(() {
          return this.barcode = 'Unknown error: $e';
        });
      }
    } on FormatException{
      setState(() => this.barcode = 'null (User returned using the "back"-button before scanning anything. Result)');
    } catch (e) {
      setState(() => this.barcode = 'Unknown error: $e');
    }
  }


  void deleteOrder(val) { //确认接单后的操作
    setState(() {
      orderList.removeAt(val);
      if (orderList.length < 4) {
        if (hasNextPage) {
          setState(() {
            page = ++page;
          });
          getOrderList(stationId,lineIdStr, page).then((resp) {
            if (resp.success && resp.code == 1) {
              setState(() {
                orderList.addAll(resp.data.items);
                hasNextPage = resp.data.hasNextPage;
              });
            }
          });
        }
      }
    });
  }

  void switchLine(BuildContext context) { //切换线路
    lineIdStr = '';
    for (int i = 0; i < checkStatusList.length; i++) {
      if (checkStatusList[i]) {
        lineIdStr += lineList[i].id.toString() + ',';
      }
    }
    if (lineIdStr == '') {
      setState(() {
        orderList = [];
        hasNextPage = false;
      });
      return;
    }
    lineIdStr = lineIdStr.substring(0, lineIdStr.length - 1);
    getKey('oldLineIdStr').then((oldLineIdStr){
      if(oldLineIdStr == lineIdStr) return;
      setKey('oldLineIdStr', lineIdStr);
      setState(() {
        orderList = [];
        hasNextPage = true;
      });
      getOrderList(stationId,lineIdStr, page).then((resp) {
        if (isNotError(context, resp) && this.mounted) {
          OrderListObj tempObj = OrderListObj.fromJson(resp.data);
          setState(() {
            orderList = tempObj.data.items;
            hasNextPage = tempObj.data.hasNextPage;
          });
          oldLineIdStr = lineIdStr;
          setKey('lineIdStr', lineIdStr);
        }
      });
    });
  }
}


class OrderCardContainer extends StatefulWidget {
  final OrderList order;
  final int index;
  final callback;
  OrderCardContainer({
    Key key,
    @required this.order,
    @required this.index,
    @required this.callback
  }): super(key: key);

  _OrderCardContainerState createState() => _OrderCardContainerState();
}

class _OrderCardContainerState extends State < OrderCardContainer > with SingleTickerProviderStateMixin {
  Animation < dynamic > animation;
  AnimationController controller;
  String str = "联系方式";
  bool animationStatus = true;
  @override
  initState() {
    super.initState();
    controller = new AnimationController(duration: const Duration(milliseconds: 200), vsync: this);
    animation = Tween(begin: 0, end: 230).animate(controller);
    animation.addStatusListener((status) {
      if (status == AnimationStatus.completed) {
        //动画执行结束时反向执行动画
        setState(() {
          animationStatus = false;
          str = "收起";
        });
      } else if (status == AnimationStatus.dismissed) {
        //动画恢复到初始状态时执行动画（正向）
        setState(() {
          animationStatus = true;
          str = "联系方式";
        });
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      margin: EdgeInsets.all(4),
      decoration: BoxDecoration(
        color: Colors.white,
        borderRadius: BorderRadius.all(Radius.circular(8)),
        boxShadow: [
         BoxShadow(color: Color.fromRGBO(217, 226, 233, 0.5),offset: Offset(0, 2),blurRadius: 3.0),
        ]
      ),
      child: Container(
        padding: EdgeInsets.fromLTRB(ScreenUtil.getInstance().setWidth(30), ScreenUtil.getInstance().setWidth(30), ScreenUtil.getInstance().setWidth(30), 0),
        child: Column(
          children: < Widget > [
            orderNoRow(widget.order.orderNo, widget.order.createTime),
            orderAddress(widget.order.sendCompanyName,widget.order.receiptCompanyName),
            orderItem('货物名称', widget.order.goods, 15),
            orderItem('货物件数', '${widget.order.goodsQuantity}件', 30),
            orderCutLine(),
            orderBtn(context, animationStatus, controller, str, widget.order.orderNo),
            AnimatedOpen(animation: animation, openInfo: widget.order, )
          ],
        ),
      )
    );
  }
  dispose() {
    //路由销毁时需要释放动画资源
    controller.dispose();
    super.dispose();
  }

  Widget orderBtn(BuildContext context, bool animationStatus, AnimationController controller, String str, String orderNo) {
    return Container(
      margin: EdgeInsets.only(bottom: ScreenUtil.getInstance().setHeight(20)),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: < Widget > [
          InkWell(
            child: Container(
              width: ScreenUtil.getInstance().setWidth(100),
              height: ScreenUtil.getInstance().setHeight(48),
              color: Colors.white,
              child: Center(
                child: Text(str, style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(24), color: Color.fromRGBO(64, 98, 254, 1)), ),
              )
            ),
            onTap: () {
              if (animationStatus) {
                //动画恢复到初始状态时执行动画（正向）
                controller.forward();
              } else {
                //动画执行结束时反向执行动画
                controller.reverse();
              }
            },
          ),
          InkWell(
            child: Container(
              width: ScreenUtil.getInstance().setWidth(94),
              height: ScreenUtil.getInstance().setWidth(48),
              decoration: BoxDecoration(
                color: Color.fromRGBO(252, 97, 128, 1),
                borderRadius: BorderRadius.all(Radius.circular(4.0))
              ),
              child: Center(
                child: Text("接单", style: TextStyle(fontSize: ScreenUtil.getInstance().setSp(24), color: Colors.white), ),
              ),
            ),
            onTap: () {
              showDialog < Null > (
                context: context, //BuildContext对象
                barrierDismissible: false,
                builder: (BuildContext context) {
                  return new LoadingDialog( //调用对话框
                    text: '是否确认接单', childCallback: (val) {
                      if (val) {
                        orderReception(orderNo).then((resp) {
                          if (isNotError(context, resp) && this.mounted) {
                            OrderReception obj = OrderReception.fromJson(resp.data);
                            if(obj.success){
                               widget.callback(widget.index);
                            }else{
                               showError(obj.msg);
                            }
                          }
                        });
                      } else {
                        return;
                      }
                    },
                  );
                });
            },
          )
        ],
      )
    );
  }
  
  showError(String str) {
    showDialog < Null > (
      context: context, //BuildContext对象
      barrierDismissible: false,
      builder: (BuildContext context) {
        return MyAlertDialog( //调用对话框
          text: str, childCallback: (val) {},
        );
      });
  }
}




class AnimatedOpen extends AnimatedWidget {
  final OrderList openInfo;
  AnimatedOpen({
    Key key,
    Animation < dynamic > animation,
    @required this.openInfo
  }): super(key: key, listenable: animation);

  Widget build(BuildContext context) {
    final Animation < dynamic > animation = listenable;
    return Container(
      height: ScreenUtil.getInstance().setHeight(animation.value),
      child: orderDetailInfo(openInfo),
    );
  }
}
Widget orderNoRow(String orderNo, int createTime) { //订单号及时间
  String date = fromatDate(createTime);
  return Container(
    margin: EdgeInsets.only(bottom: ScreenUtil.getInstance().setHeight(30)),
    child: Row(
      mainAxisAlignment: MainAxisAlignment.spaceBetween,
      children: < Widget > [
        Text("订单号：${orderNo}", style: TextStyle(color: Color.fromRGBO(153, 153, 153, 1), fontSize: ScreenUtil.getInstance().setSp(24)), ),
        Text('${date}', style: TextStyle(color: Color.fromRGBO(153, 153, 153, 1), fontSize: ScreenUtil.getInstance().setSp(24)), ),
      ],
    ),
  );
}

Widget orderAddress(String startAddress, String endAddress) { //运送路线
  return Container(
    margin: EdgeInsets.only(bottom: ScreenUtil.getInstance().setHeight(20)),
    child: Row(children: < Widget > [
      Text('${startAddress} ---> ${endAddress}',
      overflow: TextOverflow.ellipsis, style: TextStyle(color: Colors.black, fontSize: ScreenUtil.getInstance().setSp(30)), ),
    ], )
  );
}

Widget orderCutLine() { //分割线
  return Container(
    margin: EdgeInsets.only(bottom: ScreenUtil.getInstance().setHeight(20)),
    height: ScreenUtil.getInstance().setHeight(1),
    color: Color.fromRGBO(223, 223, 223, 1),
  );
}


Widget orderDetailInfo(OrderList obj) { //卡片展开信息
  String sendAddress = obj.sendCompanyProvinceName +' '+ (obj.sendCompanyCityName=='市辖区'?'':obj.sendCompanyCityName) +' '+ obj.sendCompanyAreaName+' '+ obj.sendCompanyAddress;
  String receiptAddress = obj.receiptCompanyProvinceName + ' '+(obj.receiptCompanyCityName=='市辖区'?'':obj.receiptCompanyCityName) +' '+ obj.receiptCompanyAreaName+' '+ obj.receiptCompanyAddress;
  return Container(
    child: Wrap(
      children: < Widget > [
        orderCutLine(),
        orderPhone('发件电话', obj.sendCompanyPhone, 15),
        orderItem('发件地址', sendAddress, 30),
        orderPhone('收件电话', obj.receiptCompanyPhone, 15),
        orderItem('收件地址', receiptAddress, 30),
      ],
    )
  );
}

Widget orderItem(String key, String value, int marginBottom) { //货物名称，件数
  return Container(
    margin: EdgeInsets.only(bottom: ScreenUtil.getInstance().setHeight(marginBottom)),
    child: Row(children: < Widget > [
      Text('${key}：${value}',
        overflow: TextOverflow.ellipsis,
       style: TextStyle(color: Color.fromRGBO(153, 153, 153, 1), fontSize: ScreenUtil.getInstance().setSp(24)), ),
    ], )
  );
}

Widget orderPhone(String key, String value, int marginBottom) {
  return InkWell(
    child: Container(
      margin: EdgeInsets.only(bottom: ScreenUtil.getInstance().setHeight(marginBottom)),
      child: Row(children: < Widget > [
        Text('${key}：', style: TextStyle(color: Color.fromRGBO(153, 153, 153, 1), fontSize: ScreenUtil.getInstance().setSp(24)), ),
        Text('${value}', style: TextStyle(color: Color.fromRGBO(64, 98, 254, 1), fontSize: ScreenUtil.getInstance().setSp(24)), ),
      ], )
    ),
    onTap: () async {
      String phone = 'tel:${value}';
      print(phone);
      if (await canLaunch(phone)) {
        await (launch(phone));
      } else {
        throw 'Could not launch $value';
      }
    },
  );
}