zhiying_base_widget/lib/widgets/custom/banner/custom_banner_widget.dart

import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:zhiying_base_widget/widgets/custom/banner/model/custom_banner_model.dart';
import 'package:zhiying_comm/zhiying_comm.dart';

///
/// 通用的BannerWidget
///
class CustomBannerWidget extends StatelessWidget {
  final Map<String, dynamic> data;
  CustomBannerModel _model;

  CustomBannerWidget(this.data, {Key key}) : super(key: key) {
    try {
      _model = CustomBannerModel.fromJson(jsonDecode(data['data']));
    } catch (e, s) {
      Logger.warn(e, s);
    }
  }

  /// 点击事件
  void _itemOnClick(BuildContext context, CustomBannerListStyle model) {
    print('${model?.skipIdentifier}');
    RouterUtil.route(model, model.toJson(), context);
  }

  double _convert(String val) {
    double result = 0.0;
    try {
      result = double.parse(val);
    } catch (e) {
      result = 0;
    }
    return result;
  }

  @override
  Widget build(BuildContext context) {
    /// 空视图
    if (EmptyUtil.isEmpty(_model)) {
      return Container();
    }

    return Container(
      width: double.infinity,
      height: 90,
      // color: Colors.red,
      padding: EdgeInsets.only(top: _convert(_model?.topMargin), left: 12.5, right: 12.5),
      child: _buildMainWidget(context, _model?.moduleType, _model?.listStyle),
    );
  }

  /// 主视图
  Widget _buildMainWidget(BuildContext context, String moduleType, List<CustomBannerListStyle> listStyle) {
    if (EmptyUtil.isEmpty(listStyle)) return Container();
    Widget rlt;
    switch (moduleType) {
      case 'banner1':
        rlt = _buildStyle1(context, listStyle);
        break;
      case 'banner2':
        rlt = _buildStyle2(context, listStyle);
        break;
      case 'banner3':
        rlt = _buildStyle3(context, listStyle);
        break;
      case 'banner4':
        rlt = _buildStyle4(context, listStyle);
        break;
      case 'banner5':
        rlt = _buildStyle5(context, listStyle);
        break;
      case 'banner6':
        rlt = _buildStyle6(context, listStyle);
        break;
      case 'banner7':
        rlt = _buildStyle7(context, listStyle);
        break;
      case 'banner8':
        rlt = _buildStyle8(context, listStyle);
        break;
      default:
        rlt = Container();
        break;
    }
    return rlt;
  }

  /// 1张图
  Widget _buildStyle1(BuildContext context, List<CustomBannerListStyle> listStyle) {
    return _buildColumnWidget(context, listStyle);
  }

  /// 左1右1
  Widget _buildStyle2(BuildContext context, List<CustomBannerListStyle> listStyle) {
    return _buildColumnWidget(context, listStyle);
  }

  /// 左1右2
  Widget _buildStyle3(BuildContext context, List<CustomBannerListStyle> listStyle) {
    CustomBannerListStyle left1 = listStyle.firstWhere((element) => element.locationType == 'left1');
    CustomBannerListStyle right1 = listStyle.firstWhere((element) => element.locationType == 'right1');
    CustomBannerListStyle right2 = listStyle.firstWhere((element) => element.locationType == 'right2');
    if (EmptyUtil.isEmpty(left1) || EmptyUtil.isEmpty(right1) || EmptyUtil.isEmpty(right2)) return Container();
    return Row(
      children: <Widget>[
        Flexible(flex: 1, child: GestureDetector(onTap: () => _itemOnClick(context, left1), child: CachedNetworkImage(imageUrl: left1?.img ?? ''))),
        Flexible(
          flex: 1,
          child: Column(
            children: <Widget>[
              Flexible(flex: 1, child: GestureDetector(onTap: () => _itemOnClick(context, right1), child: CachedNetworkImage(imageUrl: right1?.img ?? ''))),
              Flexible(flex: 1, child: GestureDetector(onTap: () => _itemOnClick(context, right2), child: CachedNetworkImage(imageUrl: right2?.img ?? ''))),
            ],
          ),
        ),
      ],
    );
  }

  /// 左2右1
  Widget _buildStyle4(BuildContext context, List<CustomBannerListStyle> listStyle) {
    CustomBannerListStyle left1 = listStyle.firstWhere((element) => element.locationType == 'left1');
    CustomBannerListStyle left2 = listStyle.firstWhere((element) => element.locationType == 'left2');
    CustomBannerListStyle right1 = listStyle.firstWhere((element) => element.locationType == 'right1');
    if (EmptyUtil.isEmpty(left1) || EmptyUtil.isEmpty(right1) || EmptyUtil.isEmpty(left2)) return Container();
    return Row(
      children: <Widget>[
        Flexible(
          flex: 1,
          child: Column(
            children: <Widget>[
              Flexible(flex: 1, child: GestureDetector(onTap: () => _itemOnClick(context, left1), child: CachedNetworkImage(imageUrl: left1?.img ?? ''))),
              Flexible(flex: 1, child: GestureDetector(onTap: () => _itemOnClick(context, left2), child: CachedNetworkImage(imageUrl: left2?.img ?? ''))),
            ],
          ),
        ),
        Flexible(flex: 1, child: GestureDetector(onTap: () => _itemOnClick(context, right1), child: CachedNetworkImage(imageUrl: right1?.img ?? ''))),
      ],
    );
  }

  /// 左1右3
  Widget _buildStyle5(BuildContext context, List<CustomBannerListStyle> listStyle) {
    CustomBannerListStyle left1 = listStyle.firstWhere((element) => element.locationType == 'left1');
    CustomBannerListStyle right1 = listStyle.firstWhere((element) => element.locationType == 'right1');
    CustomBannerListStyle right2 = listStyle.firstWhere((element) => element.locationType == 'right2');
    CustomBannerListStyle right3 = listStyle.firstWhere((element) => element.locationType == 'right3');
    if (EmptyUtil.isEmpty(left1) || EmptyUtil.isEmpty(right1) || EmptyUtil.isEmpty(right2) || EmptyUtil.isEmpty(right3)) return Container();

    return Row(
      children: <Widget>[
        Flexible(flex: 4, child: GestureDetector(onTap: () => _itemOnClick(context, left1), child: CachedNetworkImage(imageUrl: left1?.img ?? ''))),
        Flexible(
          flex: 6,
          child: Column(
            children: <Widget>[
              Flexible(flex: 1, child: GestureDetector(onTap: () => _itemOnClick(context, right1), child: CachedNetworkImage(imageUrl: right1?.img ?? ''))),
              Row(
                children: <Widget>[
                  Flexible(flex: 1, child: GestureDetector(onTap: () => _itemOnClick(context, right2), child: CachedNetworkImage(imageUrl: right2?.img ?? ''))),
                  Flexible(flex: 1, child: GestureDetector(onTap: () => _itemOnClick(context, right3), child: CachedNetworkImage(imageUrl: right3?.img ?? ''))),
                ],
              )
            ],
          ),
        )
      ],
    );
  }

  /// 3列
  Widget _buildStyle6(BuildContext context, List<CustomBannerListStyle> listStyle) {
    return _buildColumnWidget(context, listStyle);
  }

  /// 4列
  Widget _buildStyle7(BuildContext context, List<CustomBannerListStyle> listStyle) {
    return _buildColumnWidget(context, listStyle);
  }

  /// 5列
  Widget _buildStyle8(BuildContext context, List<CustomBannerListStyle> listStyle) {
    return _buildColumnWidget(context, listStyle);
  }

  /// 列的通用
  Widget _buildColumnWidget(BuildContext context, List<CustomBannerListStyle> listStyle) {
    return Row(
      mainAxisAlignment: MainAxisAlignment.spaceBetween,
      children: listStyle
          .map((e) => Flexible(
                flex: 1,
                child: GestureDetector(
                  behavior: HitTestBehavior.opaque,
                  onTap: () => _itemOnClick(context, e),
                  child: Container(
                      height: double.infinity,
                      width: double.infinity,
                      child: CachedNetworkImage(
                        imageUrl: e?.img ?? '',
                        fit: BoxFit.fitWidth,
                      )),
                ),
              ))
          .toList(),
    );
  }
}