rog_app/lib/widgets/destination_widget.dart

import 'dart:ffi';

import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:rogapp/pages/destination/destination_controller.dart';
import 'package:rogapp/pages/index/index_controller.dart';
import 'package:timeline_tile/timeline_tile.dart';

class DestinationWidget extends StatelessWidget {
  DestinationWidget({ Key? key }) : super(key: key);

  final DestinationController destinationController = Get.find<DestinationController>();

  final IndexController indexController = Get.find<IndexController>();

  final List<int> _items = List<int>.generate(50, (int index) => index);

  Image getImage(int index){
    if(destinationController.destinations[index]["location"]["properties"]["photos"] == null || destinationController.destinations[index]["location"]["properties"]["photos"] == ""){
      return Image(image: AssetImage('assets/images/empty_image.png'));
    }
    else{
      return Image(image: NetworkImage(destinationController.destinations[index]["location"]["properties"]["photos"]));
    }
  }

  bool getSelection(int index){
    bool ret = false;
    destinationController.destination_index_data.forEach((element) {
      if(index == element["index"]){
        if(element["selected"] == true){
          ret = true;
          return;
        }
      }
    });
    return ret;
  }

  void doDelete() {
    destinationController.destination_index_data.forEach((element) {
      //print(element["index"]);
      destinationController.deleteDestination(element["index"]);
    });
    // destinationController.destination_index_data.clear();
  }

  void moveUp() {
    destinationController.destination_index_data.forEach((element) {
      //print(element["index"]);
      int action_id = destinationController.destinations[element["index"]]["id"] as int;
      destinationController.makeOrder(action_id, (element["index"] as int) - 1, "up");

    });
  }

  void moveDown() {
    destinationController.destination_index_data.forEach((element) {
      //print(element["index"]);
      int action_id = destinationController.destinations[element["index"]]["id"] as int;
      destinationController.makeOrder(action_id, (element["index"] as int) + 1, "up");

    });
  }

  void interChange() {
    int first_index = -1;
    destinationController.destination_index_data.forEach((element) {
      //print(element["index"]);
      int action_id = destinationController.destinations[element["index"]]["id"] as int;
      destinationController.makeOrder(action_id, (element["index"] as int) + 1, "up");

    });
  }

  @override
  Widget build(BuildContext context) {
    return 
        Obx(() => 
          Stack(
          children: [
              Padding(
              padding: const EdgeInsets.only(top:45.0),
              child: ListView.builder( 
                  itemCount: destinationController.destinations.length, 
                  // onReorder: (int oldIndex, int newIndex){
                  //   int action_id = destinationController.destinations[oldIndex]["id"] as int;
                  //   //print(action_id);
                  //   if(oldIndex > newIndex){
                  //     destinationController.makeOrder(context, action_id, newIndex, "up");
                  //   }
                  //   else if(oldIndex < newIndex){
                  //     destinationController.makeOrder(context, action_id, newIndex, "down");
                  //   }
                    
                  // },
                  itemBuilder: (BuildContext context, int index) {
                  return
                    TimelineTile(
                    alignment: TimelineAlign.manual,
                    lineXY: 0.2,
                    isFirst: index == 0 ? true : false,
                    indicatorStyle: IndicatorStyle(
                      color: index == 0 ? (Colors.red) : (Colors.grey[400])!
                    ),
                    key: Key(index.toString()),
                    endChild: Card(
                      child: Container(
                        constraints: const BoxConstraints(
                          minHeight: 80,
                            ),
                        child: ListTile(
                          onLongPress: (){
                            print("#### long press #### ${destinationController.destination_index_data.length}");
                            
                            var match_element = null;
                            destinationController.destination_index_data.forEach((element) {
                              if(element["index"] == index){
                                match_element = element;
                                print("----match----");
                                return;
                              }
                            });
                            if(match_element != null){
                              destinationController.destination_index_data.remove(match_element);
                              return;
                            }
                            //print("------${destinationController.destination_index_data}----");
                            Map<String, dynamic> indexed = {'index': index, 'selected':true};
                            destinationController.destination_index_data.add(indexed);
                          },
                          selectedTileColor: Colors.amberAccent,
                          selected:getSelection(index),
                          leading: getImage(index),
                          title: Text(destinationController.destinations[index]["location"]["properties"]["location_name"]),
                          subtitle: Text(destinationController.destinations[index]["location"]["properties"]["category"]),
                        ),
                      ),
                    ),
                    startChild: Column(
                      mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                      children: [
                        Text(destinationController.matrix["rows"][0]["elements"][index]["distance"]["text"].toString()),
                        Text(destinationController.matrix["rows"][0]["elements"][index]["duration"]["text"].toString())
                      ],
                    ),
                  );
                  
                }
              ),
            ),
              Container(
                decoration: BoxDecoration(
                  boxShadow: [
                    BoxShadow(
                      color: Colors.grey.withOpacity(0.3),
                      spreadRadius: 5,
                      blurRadius: 3,
                      offset: Offset(0, 7), // changes position of shadow
                    ),
                  ],
                ),
                height: 44.0,
                width: MediaQuery.of(context).size.width,
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    IconButton(
                      icon:Icon(Icons.cancel),
                      //onPressed: (){doDelete();},
                      onPressed: destinationController.destination_index_data.length > 0 ? doDelete : null,
                    ),
                    IconButton(
                      icon:Icon(Icons.move_up),
                      onPressed: destinationController.destination_index_data.length > 0 ? moveUp : null,
                    ),
                    IconButton(
                      icon:Icon(Icons.move_down),
                      onPressed: destinationController.destination_index_data.length > 0 ? moveDown : null,
                    ),
                    IconButton(
                      icon:Icon(Icons.sync),
                      onPressed: destinationController.destination_index_data.length == 2 ? interChange : null,
                    ),
                  ],
                ),
              )
          ],
        )
        );
  }
}