javascript - I want to change the chart for each city or subcity selected

Question

I developed a simple application with AngularJS and I want to add a simple chart based on this website Js Charts

This is my data.json:

[
    {
        "name": "city A",
        "elements": [
            {
                "id": "c01",
                "name": "name1",
                "price": "15",
                "qte": "10"
            },
            {
                "id": "c02",
                "name": "name2",
                "price": "18",
                "qte": "11"
            },
            {
                "id": "c03",
                "name": "name3",
                "price": "11",
                "qte": "14"
            }
        ],
        "subsities": [
            {
                "name": "sub A1",
                "elements": [
                    {
                        "id": "sub01",
                        "name": "nameSub1",
                        "price": "1",
                        "qte": "14"
                    },
                    {
                        "id": "sub02",
                        "name": "nameSub2",
                        "price": "8",
                        "qte": "13"
                    },
                    {
                        "id": "sub03",
                        "name": "nameSub3",
                        "price": "1",
                        "qte": "14"
                    }
                ]
            },
            {
                "name": "sub A2",
                "elements": [
                    {
                        "id": "ssub01",
                        "name": "nameSsub1",
                        "price": "1",
                        "qte": "7"
                    },
                    {
                        "id": "ssub02",
                        "name": "nameSsub2",
                        "price": "8",
                        "qte": "1"
                    },
                    {
                        "id": "ssub03",
                        "name": "nameSsub3",
                        "price": "4",
                        "qte": "19"
                    }
                ]
            },
            {
                "name": "sub A3",
                "elements": [
                    {
                        "id": "sssub01",
                        "name": "nameSssub1",
                        "price": "1",
                        "qte": "11"
                    },
                    {
                        "id": "sssub02",
                        "name": "nameSssub2",
                        "price": "2",
                        "qte": "15"
                    },
                    {
                        "id": "sssub03",
                        "name": "nameSssub3",
                        "price": "1",
                        "qte": "15"
                    }
                ]
            }
        ]
    },
    {
        "name": "city B",
        "elements": [
            {
                "id": "cc01",
                "name": "name11",
                "price": "10",
                "qte": "11"
            },
            {
                "id": "cc02",
                "name": "name22",
                "price": "14",
                "qte": "19"
            },
            {
                "id": "cc03",
                "name": "name33",
                "price": "11",
                "qte": "18"
            }
        ]
    },
    {
        "name": "city C",
        "elements": [
            {
                "id": "ccc01",
                "name": "name111",
                "price": "19",
                "qte": "12"
            },
            {
                "id": "ccc02",
                "name": "name222",
                "price": "18",
                "qte": "17"
            },
            {
                "id": "ccc03",
                "name": "name333",
                "price": "10",
                "qte": "5"
            }
        ]
    }
]

I call my data here.

 angular.module('app', [])
        .controller('MainController', ['$scope', '$http', function($scope, $http) {
            $http.get('js/controllers/data.json').then(function(response) {
                $scope.cities = response.data;
                $scope.selectedCity = $scope.cities[0];
                $scope.data = $scope.selectedCity.elements;
            });

            $scope.myJson = {
                "type": "line",
                "plotarea": {
                    "adjust-layout":true /* For automatic margin adjustment. */
                },
                "scale-x": {
                    "label": { /* Add a scale title with a label object. */
                        "text":"Above is an example of a category scale",
                    },
                /* Add your scale labels with a labels array. */
                    "labels":["name1","name2","name3"]
                },
                "series": [
                    {"values":[15,18,11]},//here the prices of city selected
                    {"values":[10,11,14]}//here the qte of city selected
                ]
            };

            $scope.extractSubsities = function(itemSelected) {
                if (itemSelected && itemSelected.elements) {
                    $scope.data = itemSelected.elements;
                }
            }
     }]);

index.html :

<body ng-controller="MainCtrl">
<select ng-model="selectedCity"  ng-change="extractSubsities(selectedCity)" ng-options="item as item.name for item in cities track by item.name" ng-init="selectedCity = cities[0];extractSubsities(selectedCity)">
</select>

<select ng-show="selectedCity.subsities" ng-model="selectedSubCity"  ng-change="extractSubsities(selectedSubCity)" ng-options="item2 as item2.name for item2 in selectedCity.subsities track by item2.name">
  <option style="" value=""></option>
</select>

<table>
  <tr ng-repeat="item3 in data track by item3.id">
    <td>{{ item3.id }}</td>
    <td>{{ item3.name }}</td>
    <td>{{ item3.price }}</td>
  </tr>
</table>

<zingchart id = "myChart" zc-json = "myJson" zc-height = 500 zc-width = 600 ></zingchart>
</body>

the result:

I want to extract from the the attribute name element's city

I want to change the chart for each city or subcity selected. For example if I select the subcity is sub A1 I need to get a chart like :

Please help me !

UPDATE :

I tried to use only one source file of data

[{
        "type": "line",
        "plotarea": {
            "adjust-layout": true
        },
        "scale-x": {
            "label": {
                "text": "échelle essence gazoile"
            },

            "labels": ["sub01", "sub02", "sub02"]
        },
        "series": [{
            "values": [1, 8, 1]
        }, {
            "values": [14, 13, 14]
        }],

        "name": "city A",
        "elements": [{
          "id": "c01",
          "name": "name1",
          "price": "15",
          "qte": "10"
        }, {
          "id": "c02",
          "name": "name2',
          "price": "18,
          "qte": "11"
        }, {
          "id": "c03",
          "name": "name3",
          "price": "11",
          "qte": "14"
        }],
        "subsities": [{
          "name": "sub A1",
          "elements": [{
            "id": "sub01",
            "name": "nameSub1",
            "price": "1",
            "qte": "14"
          }, {
            "id": "sub02",
            "name": "nameSub2",
            "price": "8",
            "qte": "13"
          }, {
            "id": "sub03",
            "name": "nameSub3",
            "price": "1",
            "qte": "14"
          }]
        }, {
          "name": "sub A2",
          "elements": [{
            "id": "ssub01",
            "name": "nameSsub1",
            "price": "1",
            "qte": "7"
          }, {
            "id": "ssub02",
            "name": "nameSsub2",
            "price": "8",
            "qte": "1"
          }, {
            "id": "ssub03",
            "name": "nameSsub3",
            "price": "4",
            "qte": "19"
          }]
        }, {
          "name": "sub A3",
          "elements": [{
            "id": "sssub01",
            "name": "nameSssub1",
            "price": "1",
            "qte": "11"
          }, {
            "id": "sssub02",
            "name": "nameSssub2",
            "price": "2",
            "qte": "15"
          }, {
            "id": "sssub03",
            "name": "nameSssub3",
            "price": "1",
            "qte": "15"
          }]
        }]
      }, {
        "name": "city B",
        "elements": [{
          "id": "cc01",
          "name": "name11",
          "price": "10",
          "qte": "11"
        }, {
          "id": "cc02",
          "name": "name22",
          "price": "14",
          "qte": "19"
        }, {
          "id": "cc03",
          "name": "name33",
          "price": "11",
          "qte": "18"
        }]
      }, {
        "name": "city C",
        "elements": [{
          "id": "ccc01",
          "name": "name111",
          "price": "19",
          "qte": "12"
        }, {
          "id": "ccc02",
          "name": "name222",
          "price": "18",
          "qte": "17"
        }, {
          "id": "ccc03",
          "name": "name333",
          "price": "10",
          "qte": "5"
        }]
      }];

I called my data here :

angular.module('app', []).controller('MainController', ['$scope', '$http', function($scope, $http) {

      $http.get('js/controllers/data.json').then(function(response) { 
      $scope.cities = response.data; 
      $scope.myJson=response.data;
      $scope.selectedCity = $scope.cities[0];
      $scope.data = $scope.selectedCity.elements;
  }, function(error) { console.log(error); });

  $scope.name = 'World';
  $scope.data;

  $scope.extractSubsities = function(itemSelected) {
    if(itemSelected && itemSelected.elements){
        $scope.data = itemSelected.elements;
    }

  }

 }]);

index.html :

<body ng-controller="MainCtrl">
<select ng-model="selectedCity"  ng-change="extractSubsities(selectedCity)" ng-options="item as item.name for item in cities track by item.name" ng-init="selectedCity = cities[0];extractSubsities(selectedCity)">
  </select>

      <select ng-show="selectedCity.subsities" ng-model="selectedSubCity"  ng-change="extractSubsities(selectedSubCity)" ng-options="item2 as item2.name for item2 in selectedCity.subsities track by item2.name">
       <option style="" value=""></option>
       </select>

      <table>
        <tr ng-repeat="item3 in data track by item3.id">
          <td>{{ item3.id }}</td>
          <td>{{ item3.name }}</td>
          <td>{{ item3.price }}</td>
        &l

Answer 1

Well, If I understand you right then you need something following:

angular.module("myApp",['zingchart-angularjs'])
   .controller('MainController', ['$scope', '$http', function($scope, $http) {
      $scope.chartBase = {
        "type": "line",
        "plotarea": {
          "adjust-layout": true /* For automatic margin adjustment. */
        },
        "scale-x": {
          "label": { 
            "text": "Above is an example of a category scale" /* Add a scale title with a label object. */
          },
          "labels": ["name1", "name2", "name3"] /* Add your scale labels with a labels array. */
        },
        "series": [{
            "values": [15, 18, 11] //here the prices of city selected
          },{
            "values": [10, 11, 14] //here the qte of city selected
          }]
      };
      $scope.chartData = angular.copy($scope.chartBase);

      $http.get('data.json')
           .then(function(response) {
             $scope.cities = response.data; // save the request data
             $scope.selectedCity = $scope.cities[0]; // select the first one
             $scope.changeCity(); // update chart
            }, function(error) { console.log(error); });

      $scope.changeCity = function() {
        if($scope.selectedSubCity || $scope.selectedCity){ // if something has been selected
            $scope.data = ($scope.selectedSubCity || $scope.selectedCity).elements; // update elements field

            // initialize the array to be displayed in chart
            var labels = [];
            var price = {
              "values": []
            };
            var qte = {
              "values": []
            };

            // fill the arrays to be displayed from the selected city (sub city)
            angular.forEach($scope.data, function(item, index) {
              labels.push(item.name);
              price.values.push(item.price);
              qte.values.push(item.qte);
            });

            // put selected values to the field that is used to render the chart
            $scope.chartData["scale-x"].labels = labels;
            $scope.chartData.series = [ price, qte ];
        }
      }
   }]);

I modified a bit you controller (and html page). Here is an example - plunker.

The difficulties (as I can see) were in your data.json file. It has a weird structure. It combines the chart parameters and the data itself. (in my example I removed chart parameters from it and hardcoded them inside the controller. but it's not necessary).

Hope it will help.