You can't access changePage()
defined in controller's scope from directive directly, since your directive has isolated scope. However, there are still several ways to do it:
Option 1:
Option 1 is the most simple option. However it is much like a workaround and I don't recommend to use it widely. You can get your controller's scope from element passed to link function and invoke changePage
there:
link: function (scope, element, attrs, ctrl, transclude) {
if (!attrs.title) scope.title = "Default title";
scope.changePage = element.scope().changePage; // <= Get parent scope from element, it will have changePage()
}
Option 2:
If you don't have any logic that involves scope defined in the outer controller (as in your example), you can define inner controller for your directive and perform it there:
app.directive('plantStages', function ($compile) {
return {
...
controller: ['$scope', function($scope) {
$scope.changePage = function(page) {
var url = "corn.page.html#/"+page;
console.log("Change page "+page+" with url "+url);
alert("about to change page as follows: document.location.href = "+url);
}
}]
};
});
Option 3:
If you want do reuse logic defined in changePage()
in different directives and controllers, the best way to do it is to move the logic to some service that may be injected to both controller and directive:
app.service('changePageService', function() {
this.changePage = function(page) {
var url = "corn.page.html#/"+page;
console.log("Change page "+page+" with url "+url);
alert("about to change page as follows: document.location.href = "+url);
}
});
app.controller('myCtrl', function ($scope, $location, $http, changePageService) {
...
changePageService.changePage('page');
...
});
app.directive('plantStages', function ($compile) {
...
controller: ['$scope', 'changePageService', function($scope, changePageService) {
$scope.changePage = changePageService.changePage;
}]
...
});
Option 4:
You can pass piece of code like changePage(page)
as value of some attribute of the directive and inside directive define scope property with '&'
that will create a function that will be executed in the outer controller's scope with arguments passed to that function. Example:
JavaScript
app.directive('plantStages', function ($compile) {
return {
restrict: 'E',
transclude: true,
template: '<figure class="cornStages">\
<p ng-transclude style="color: skyblue"></p>\
<hr/>\
<p ng-bind-html="title"></p>\
<p ng-bind-html="subtitle"></p>\
<ul>\
<li ng-repeat="stage in stages" ng-click="changePage({page: stage})">{{stage}}</li>\
</ul>\
</figure>',
scope: {
stages:"=",
title:'@',
changePage:'&'
},
link: function (scope, element, attrs, ctrl, transclude) {
if (!attrs.title) scope.title = "Default title";
}
};
});
HTML
<div ng-controller="myCtrl">
Stages,
<p ng-repeat="stage in stages">{{stage}}</p>
<hr/>
Plant stages
<plant-stages
title="<b>Exploration<br/>du cycle</b>"
subtitle="<em>This is a<br/>sub title</em>"
stages="stages"
change-page="changePage(page)"
>
Inner<br/>directive
</plant-stages>
Plunker: http://plnkr.co/edit/s4CFI3wxs0SOmZVhUkC4?p=preview