Accedere al metodo controller significa accedere a un metodo su ambito padre dal controller / collegamento / ambito direttiva.
Se la direttiva condivide / eredita l'ambito padre, è abbastanza semplice invocare un metodo ambito padre.
È necessario un po 'più di lavoro quando si desidera accedere al metodo dell'ambito padre dall'ambito della direttiva Isolata.
Esistono poche opzioni (che possono essere più di quelle elencate di seguito) per invocare un metodo dell'ambito padre dall'ambito delle direttive isolato o guardare le variabili dell'ambito padre ( opzione n. 6 in particolare).
Si noti che ho usato link function
in questi esempi ma è possibile utilizzare anche uno directive controller
basato sul requisito.
Opzione 1. Tramite Object template letterale e direttiva html
index.html
<!DOCTYPE html>
<html ng-app="plunker">
<head>
<meta charset="utf-8" />
<title>AngularJS Plunker</title>
<script>document.write('<base href="' + document.location + '" />');</script>
<link rel="stylesheet" href="style.css" />
<script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.9/angular.js" data-semver="1.3.9"></script>
<script src="app.js"></script>
</head>
<body ng-controller="MainCtrl">
<p>Hello {{name}}!</p>
<p> Directive Content</p>
<sd-items-filter selected-items="selectedItems" selected-items-changed="selectedItemsChanged(selectedItems)" items="items"> </sd-items-filter>
<P style="color:red">Selected Items (in parent controller) set to: {{selectedItemsReturnedFromDirective}} </p>
</body>
</html>
itemfilterTemplate.html
<select ng-model="selectedItems" multiple="multiple" style="height: 200px; width: 250px;" ng-change="selectedItemsChanged({selectedItems:selectedItems})" ng-options="item.id as item.name group by item.model for item in items | orderBy:'name'">
<option>--</option>
</select>
app.js
var app = angular.module('plunker', []);
app.directive('sdItemsFilter', function() {
return {
restrict: 'E',
scope: {
items: '=',
selectedItems: '=',
selectedItemsChanged: '&'
},
templateUrl: "itemfilterTemplate.html"
}
})
app.controller('MainCtrl', function($scope) {
$scope.name = 'TARS';
$scope.selectedItems = ["allItems"];
$scope.selectedItemsChanged = function(selectedItems1) {
$scope.selectedItemsReturnedFromDirective = selectedItems1;
}
$scope.items = [{
"id": "allItems",
"name": "All Items",
"order": 0
}, {
"id": "CaseItem",
"name": "Case Item",
"model": "PredefinedModel"
}, {
"id": "Application",
"name": "Application",
"model": "Bank"
}]
});
working plnkr: http://plnkr.co/edit/rgKUsYGDo9O3tewL6xgr?p=preview
Opzione 2. Attraverso Object letteral e dal link / scope della direttiva
index.html
<!DOCTYPE html>
<html ng-app="plunker">
<head>
<meta charset="utf-8" />
<title>AngularJS Plunker</title>
<script>document.write('<base href="' + document.location + '" />');</script>
<link rel="stylesheet" href="style.css" />
<script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.9/angular.js" data-semver="1.3.9"></script>
<script src="app.js"></script>
</head>
<body ng-controller="MainCtrl">
<p>Hello {{name}}!</p>
<p> Directive Content</p>
<sd-items-filter selected-items="selectedItems" selected-items-changed="selectedItemsChanged(selectedItems)" items="items"> </sd-items-filter>
<P style="color:red">Selected Items (in parent controller) set to: {{selectedItemsReturnedFromDirective}} </p>
</body>
</html>
itemfilterTemplate.html
<select ng-model="selectedItems" multiple="multiple" style="height: 200px; width: 250px;"
ng-change="selectedItemsChangedDir()" ng-options="item.id as item.name group by item.model for item in items | orderBy:'name'">
<option>--</option>
</select>
app.js
var app = angular.module('plunker', []);
app.directive('sdItemsFilter', function() {
return {
restrict: 'E',
scope: {
items: '=',
selectedItems: '=',
selectedItemsChanged: '&'
},
templateUrl: "itemfilterTemplate.html",
link: function (scope, element, attrs){
scope.selectedItemsChangedDir = function(){
scope.selectedItemsChanged({selectedItems:scope.selectedItems});
}
}
}
})
app.controller('MainCtrl', function($scope) {
$scope.name = 'TARS';
$scope.selectedItems = ["allItems"];
$scope.selectedItemsChanged = function(selectedItems1) {
$scope.selectedItemsReturnedFromDirective = selectedItems1;
}
$scope.items = [{
"id": "allItems",
"name": "All Items",
"order": 0
}, {
"id": "CaseItem",
"name": "Case Item",
"model": "PredefinedModel"
}, {
"id": "Application",
"name": "Application",
"model": "Bank"
}]
});
working plnkr: http://plnkr.co/edit/BRvYm2SpSpBK9uxNIcTa?p=preview
Opzione # 3. Tramite riferimento alle funzioni e dal modello html della direttiva
index.html
<!DOCTYPE html>
<html ng-app="plunker">
<head>
<meta charset="utf-8" />
<title>AngularJS Plunker</title>
<script>document.write('<base href="' + document.location + '" />');</script>
<link rel="stylesheet" href="style.css" />
<script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.9/angular.js" data-semver="1.3.9"></script>
<script src="app.js"></script>
</head>
<body ng-controller="MainCtrl">
<p>Hello {{name}}!</p>
<p> Directive Content</p>
<sd-items-filter selected-items="selectedItems" selected-items-changed="selectedItemsChanged" items="items"> </sd-items-filter>
<P style="color:red">Selected Items (in parent controller) set to: {{selectedItemsReturnFromDirective}} </p>
</body>
</html>
itemfilterTemplate.html
<select ng-model="selectedItems" multiple="multiple" style="height: 200px; width: 250px;"
ng-change="selectedItemsChanged()(selectedItems)" ng-options="item.id as item.name group by item.model for item in items | orderBy:'name'">
<option>--</option>
</select>
app.js
var app = angular.module('plunker', []);
app.directive('sdItemsFilter', function() {
return {
restrict: 'E',
scope: {
items: '=',
selectedItems:'=',
selectedItemsChanged: '&'
},
templateUrl: "itemfilterTemplate.html"
}
})
app.controller('MainCtrl', function($scope) {
$scope.name = 'TARS';
$scope.selectedItems = ["allItems"];
$scope.selectedItemsChanged = function(selectedItems1) {
$scope.selectedItemsReturnFromDirective = selectedItems1;
}
$scope.items = [{
"id": "allItems",
"name": "All Items",
"order": 0
}, {
"id": "CaseItem",
"name": "Case Item",
"model": "PredefinedModel"
}, {
"id": "Application",
"name": "Application",
"model": "Bank"
}]
});
working plnkr: http://plnkr.co/edit/Jo6FcYfVXCCg3vH42BIz?p=preview
Opzione # 4. Attraverso il riferimento alle funzioni e dal collegamento / ambito della direttiva
index.html
<!DOCTYPE html>
<html ng-app="plunker">
<head>
<meta charset="utf-8" />
<title>AngularJS Plunker</title>
<script>document.write('<base href="' + document.location + '" />');</script>
<link rel="stylesheet" href="style.css" />
<script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.9/angular.js" data-semver="1.3.9"></script>
<script src="app.js"></script>
</head>
<body ng-controller="MainCtrl">
<p>Hello {{name}}!</p>
<p> Directive Content</p>
<sd-items-filter selected-items="selectedItems" selected-items-changed="selectedItemsChanged" items="items"> </sd-items-filter>
<P style="color:red">Selected Items (in parent controller) set to: {{selectedItemsReturnedFromDirective}} </p>
</body>
</html>
itemfilterTemplate.html
<select ng-model="selectedItems" multiple="multiple" style="height: 200px; width: 250px;" ng-change="selectedItemsChangedDir()" ng-options="item.id as item.name group by item.model for item in items | orderBy:'name'">
<option>--</option>
</select>
app.js
var app = angular.module('plunker', []);
app.directive('sdItemsFilter', function() {
return {
restrict: 'E',
scope: {
items: '=',
selectedItems: '=',
selectedItemsChanged: '&'
},
templateUrl: "itemfilterTemplate.html",
link: function (scope, element, attrs){
scope.selectedItemsChangedDir = function(){
scope.selectedItemsChanged()(scope.selectedItems);
}
}
}
})
app.controller('MainCtrl', function($scope) {
$scope.name = 'TARS';
$scope.selectedItems = ["allItems"];
$scope.selectedItemsChanged = function(selectedItems1) {
$scope.selectedItemsReturnedFromDirective = selectedItems1;
}
$scope.items = [{
"id": "allItems",
"name": "All Items",
"order": 0
}, {
"id": "CaseItem",
"name": "Case Item",
"model": "PredefinedModel"
}, {
"id": "Application",
"name": "Application",
"model": "Bank"
}]
});
working plnkr: http://plnkr.co/edit/BSqx2J1yCY86IJwAnQF1?p=preview
Opzione n. 5: tramite ng-model e associazione a due vie, è possibile aggiornare le variabili dell'ambito padre. . Pertanto, in alcuni casi potrebbe non essere necessario richiamare le funzioni dell'ambito padre.
index.html
<!DOCTYPE html>
<html ng-app="plunker">
<head>
<meta charset="utf-8" />
<title>AngularJS Plunker</title>
<script>document.write('<base href="' + document.location + '" />');</script>
<link rel="stylesheet" href="style.css" />
<script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.9/angular.js" data-semver="1.3.9"></script>
<script src="app.js"></script>
</head>
<body ng-controller="MainCtrl">
<p>Hello {{name}}!</p>
<p> Directive Content</p>
<sd-items-filter ng-model="selectedItems" selected-items-changed="selectedItemsChanged" items="items"> </sd-items-filter>
<P style="color:red">Selected Items (in parent controller) set to: {{selectedItems}} </p>
</body>
</html>
itemfilterTemplate.html
<select ng-model="selectedItems" multiple="multiple" style="height: 200px; width: 250px;"
ng-options="item.id as item.name group by item.model for item in items | orderBy:'name'">
<option>--</option>
</select>
app.js
var app = angular.module('plunker', []);
app.directive('sdItemsFilter', function() {
return {
restrict: 'E',
scope: {
items: '=',
selectedItems: '=ngModel'
},
templateUrl: "itemfilterTemplate.html"
}
})
app.controller('MainCtrl', function($scope) {
$scope.name = 'TARS';
$scope.selectedItems = ["allItems"];
$scope.items = [{
"id": "allItems",
"name": "All Items",
"order": 0
}, {
"id": "CaseItem",
"name": "Case Item",
"model": "PredefinedModel"
}, {
"id": "Application",
"name": "Application",
"model": "Bank"
}]
});
working plnkr: http://plnkr.co/edit/hNui3xgzdTnfcdzljihY?p=preview
Opzione n. 6: Through $watch
e$watchCollection
È vincolante items
in due modi per tutti gli esempi precedenti, se gli articoli vengono modificati nell'ambito genitore, anche gli articoli nella direttiva rifletterebbero le modifiche.
Se si desidera guardare altri attributi o oggetti dall'ambito padre, è possibile farlo utilizzando $watch
e $watchCollection
come indicato di seguito
html
<!DOCTYPE html>
<html ng-app="plunker">
<head>
<meta charset="utf-8" />
<title>AngularJS Plunker</title>
<script>
document.write('<base href="' + document.location + '" />');
</script>
<link rel="stylesheet" href="style.css" />
<script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.9/angular.js" data-semver="1.3.9"></script>
<script src="app.js"></script>
</head>
<body ng-controller="MainCtrl">
<p>Hello {{user}}!</p>
<p>directive is watching name and current item</p>
<table>
<tr>
<td>Id:</td>
<td>
<input type="text" ng-model="id" />
</td>
</tr>
<tr>
<td>Name:</td>
<td>
<input type="text" ng-model="name" />
</td>
</tr>
<tr>
<td>Model:</td>
<td>
<input type="text" ng-model="model" />
</td>
</tr>
</table>
<button style="margin-left:50px" type="buttun" ng-click="addItem()">Add Item</button>
<p>Directive Contents</p>
<sd-items-filter ng-model="selectedItems" current-item="currentItem" name="{{name}}" selected-items-changed="selectedItemsChanged" items="items"></sd-items-filter>
<P style="color:red">Selected Items (in parent controller) set to: {{selectedItems}}</p>
</body>
</html>
script app.js
var app = angular.module ('plunker', []);
app.directive('sdItemsFilter', function() {
return {
restrict: 'E',
scope: {
name: '@',
currentItem: '=',
items: '=',
selectedItems: '=ngModel'
},
template: '<select ng-model="selectedItems" multiple="multiple" style="height: 140px; width: 250px;"' +
'ng-options="item.id as item.name group by item.model for item in items | orderBy:\'name\'">' +
'<option>--</option> </select>',
link: function(scope, element, attrs) {
scope.$watchCollection('currentItem', function() {
console.log(JSON.stringify(scope.currentItem));
});
scope.$watch('name', function() {
console.log(JSON.stringify(scope.name));
});
}
}
})
app.controller('MainCtrl', function($scope) {
$scope.user = 'World';
$scope.addItem = function() {
$scope.items.push({
id: $scope.id,
name: $scope.name,
model: $scope.model
});
$scope.currentItem = {};
$scope.currentItem.id = $scope.id;
$scope.currentItem.name = $scope.name;
$scope.currentItem.model = $scope.model;
}
$scope.selectedItems = ["allItems"];
$scope.items = [{
"id": "allItems",
"name": "All Items",
"order": 0
}, {
"id": "CaseItem",
"name": "Case Item",
"model": "PredefinedModel"
}, {
"id": "Application",
"name": "Application",
"model": "Bank"
}]
});
Puoi sempre fare riferimento alla documentazione di AngularJs per spiegazioni dettagliate sulle direttive.