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              <html ng-app='DemoDragAndDrop'>

<head>
  <script src="//cdnjs.cloudflare.com/ajax/libs/angular.js/1.1.5/angular.min.js"></script>
  <meta charset=utf-8 />
  <title>Drag and Drop Con Angular</title>
</head>

<body ng-controller='DemoCtrl' ng-cloack>
  <div class="row">
    <div class="col-sm-8">
      <h5>Arrastre los elementos disponibles hacia la siguiente línea:</h5>
      <img id="{{el.id}}" class="draggable" ng-repeat="el in resultado" droppable-area src="{{el.avatar}}" draggable-thing />
      <div class="col-sm-4">
        <h5>Elementos Disponibles</h5>
        <div id="{{el.id}}" class="draggable" ng-repeat="el in disponible" droppable-area draggable="true" draggable-thing>
          <img id="{{el.id}}" src="{{el.avatar}}" />
        </div>
      </div>
    </div>
  </div>
  <hr>
  <h3>Lo interesante de esto...</h3>
  <p>
    El objetivo de agregar angular a la funcionalidad de <b>Drag and Drop</b> no es solamente que las imagenes se carguen dinámicamente a través de los arreglos <b>$scope.disponible</b> y <b>$scope.resultado</b>.
  </p>
  <p>
    Los arreglos <b>$scope.disponible</b> y <b>$scope.resultado</b> siempre reflejarán los cambios que se realicen arrastrando las imagenes de una posición a otra.
  </p>
  <p>
    Esto nos permite recuperar los cambios que el usuario haya realizado y enviarlos a otro servidor remoto para procesarlos (puede ser que se guarde la información a una base de datos).
  </p>
  <p>
    Para poder ver esto utiliza los siguientes botones (el resultado se verá mejor en la consola que en los alert):
    <input type="button" value="Ver Disponibles" ng-click='verDisponibles()' />
    <input type="button" value="Ver Resultado" ng-click='verResultado()' />
  </p>
</body>

</html>
            
          
!
            
              * {
  box-sizing: border-box;
  font-family: Verdana;
  text-align: center;
}

body {
  background-color: #F2F2F2;
}

.draggable {
  width: 75px;
  height: 75px;
  display: inline-block;
  border: 1px solid #aaaaaa;
  padding: 5px;
  background-repeat: no-repeat;
  background-position: center;
  cursor: pointer;
  margin: 5px;
}

pre {
  font-family: "Courier New" Courier monospace;
  width: 100%;
}
            
          
!
            
              'use strict';

var app = angular.module('DemoDragAndDrop', []);

app.controller('DemoCtrl', ['$scope', function($scope) {
  $scope.disponible = [{
    id: 'disponible_0',
    avatar: 'https://cdn4.iconfinder.com/data/icons/imoticons/105/imoticon_3-64.png'
  }, {
    id: 'disponible_1',
    avatar: 'https://cdn4.iconfinder.com/data/icons/imoticons/105/imoticon_6-64.png'
  }, {
    id: 'disponible_2',
    avatar: 'https://cdn4.iconfinder.com/data/icons/imoticons/105/imoticon_4-64.png'
  }];

  $scope.resultado = [{
    id: 'resultado_0',
    avatar: 'https://cdn0.iconfinder.com/data/icons/TWG_Retina_Icons/64/cancel.png'
  }, {
    id: 'resultado_1',
    avatar: 'https://cdn0.iconfinder.com/data/icons/TWG_Retina_Icons/64/cancel.png'
  }, {
    id: 'resultado_2',
    avatar: 'https://cdn0.iconfinder.com/data/icons/TWG_Retina_Icons/64/cancel.png'
  }, {
    id: 'resultado_3',
    avatar: 'https://cdn0.iconfinder.com/data/icons/TWG_Retina_Icons/64/cancel.png'
  }, {
    id: 'resultado_4',
    avatar: 'https://cdn0.iconfinder.com/data/icons/TWG_Retina_Icons/64/cancel.png'
  }, {
    id: 'resultado_5',
    avatar: 'https://cdn0.iconfinder.com/data/icons/TWG_Retina_Icons/64/cancel.png'
  }];

  $scope.mover = function(origin, dest) {
    var origin$name = origin.split('_')[0];
    var origin$index = origin.split('_')[1];

    var dest$name = dest.split('_')[0];
    var dest$index = dest.split('_')[1];

    var bkDestino = $scope[dest$name][dest$index].avatar;
    $scope.$apply(function() {
      $scope[dest$name][dest$index].avatar = $scope[origin$name][origin$index].avatar;
      $scope[origin$name][origin$index].avatar = bkDestino;
    });
  };
  
  $scope.verDisponibles = function() {
    console.log($scope.disponible);
    alert(JSON.stringify($scope.disponible));
  };
  
  $scope.verResultado = function() {
    console.log($scope.resultado);
    alert(JSON.stringify($scope.resultado));
  };
}]);

app.directive('draggableThing', function() {
  return {
    restrict: 'A',
    link: function(scope, elem, attr, ctrl) {
      elem.bind('dragstart', function(e) {
        event.dataTransfer.setData("text", event.target.id);
      });
    }
  };
});

app.directive('droppableArea', function() {
  return {
    restrict: 'A',
    link: function(scope, elem, attr, ctrl) {
      elem.bind('drop', function(e, ui) {
        e.preventDefault();
        var origin = event.dataTransfer.getData("text");
        var dest = attr['id'];
        scope.mover(origin, dest);
      });
      elem.bind('dragover', function(e) {
        e.preventDefault();
      });
    }
  };
});
            
          
!
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