observing the pathway and modifying a variable within a directive's scope

A specialized directive has been crafted below, designed to generate a series of buttons relying on the data supplied to it.

angular.module('btnbar.directive', ['messaging']).
directive("btnBar", function(){
  return {
    restrict: 'E',
      $scope.buttons = [{href: '#/students', icon:'icon-ok'},
                         {href: '#/students', icon:'icon-remove'},
                         {href: '#/students/new', icon:'icon-plus'}];    
    },
    template:'<div class="btn-toolbar">' +
      '<a class="btn" ng-repeat="b in buttons" href={{b.href}}>' +
      '<i class={{b.icon}}></i></a></div>',
    replace:true
  }
});

The aforementioned directive functions effectively. It is desired that whenever the ng-view within the view shifts, a fresh array should be passed for the buttons.

Hence, two specific tasks need to be addressed -

  1. Detect any alteration in the route.

  2. Upon a change in the route, update the 'buttons' variable within the scope of 'btnbar.directive'.

Is there an optimal way to carry out these actions?

javascriptangularjs

Answer №1

If you want to dynamically update the buttons in your UI based on changes in the $location service, you can utilize Angular's $watch functionality. Here is a sample implementation:

angular.module('btnbar.directive', ['messaging']).
directive("btnBar", ['$location', function($location){
  return {
    restrict: 'E',
    template:'<div class="btn-toolbar">' +
      '<a class="btn" ng-repeat="b in buttons" href={{b.href}}>' +
      '<i class={{b.icon}}></i></a></div>',
    replace:true,
    link: function($scope, $element, $attrs) {
        $scope.buttons = [{href: '#/students', icon:'icon-ok'},
                          {href: '#/students', icon:'icon-remove'},
                          {href: '#/students/new', icon:'icon-plus'}];
        
        $scope.$watch(function() {
            return $location;
        }, function(newValue, oldValue) {
            // Update the $scope.buttons based on $location changes
        });
    }
  }
}]);

I hope this solution works for you!

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