In this tip you can see how to avoid code duplication by using controller inheritance, This feature can be used by using the ng-controller directive nested in HTML elements. The scopes of the child controllers inherit the data and behaviors of the parent controller scope.
Below we have the atpMainCtrl, which is a controller used at body level, the atpFirstCtrl controller, which is used at div level under the body level, and atpSecondCtrl which is used at a sub-div of the previous div. So, if we say that atpMainCtrl = A, atpFirstCtrl = B and atpSecondCtrl = C, then:
- A is the main controller, doesn't inherit other controller
- B is a child of A
- C is a child of B and A
<!DOCTYPE html>
<html ng-app="atpModule">
<head lang="en">
<meta charset="UTF-8">
<title></title>
<script src="../angular/angular.min.js"></script>
<link href="../bootstrap/css/bootstrap.css" rel="stylesheet"/>
<link href="../bootstrap/css/bootstrap-theme.css" rel="stylesheet"/>
<script>
angular.module("atpModule", [])
.controller("atpMainCtrl", function ($scope) {
$scope.atp = [
{ name: 'Nadal, Rafael (ESP)', email: 'nadalrafael@gmail.com', birthplace: 'Manacor, Mallorca, Spain' },
{ name: 'Djokovic, Novak (SRB)', email: 'djokovicnovak@gmail.com', birthplace: 'Belgrade, Serbia' },
{ name: 'Federer, Roger (SUI)', email: 'federerroger@gmail.com', birthplace: 'Basel, Switzerland' },
{ name: 'Wawrinka, Stan (SUI)', email: 'wawrinkastan@gmail.com', birthplace: 'Lausanne, Switzerland' },
{ name: 'Ferrer, David (ESP)', email: 'ferrerdavid@gmail.com', birthplace: 'Javea, Spain' }
];
$scope.namesToUpperCase = function () {
angular.forEach($scope.atp, function (value, key) {
value.name = value.name.toUpperCase();
});
}
$scope.namesToLowerCase = function () {
angular.forEach($scope.atp, function (value, key) {
value.name = value.name.toLowerCase();
});
}
})
.controller("atpFirstCtrl", function ($scope) {
$scope.namesAndEmailsToUpperCase = function () {
$scope.namesToUpperCase();
angular.forEach($scope.atp, function (value, key) {
value.email = value.email.toUpperCase();
});
}
$scope.namesAndEmailsToLowerCase = function () {
$scope.namesToLowerCase();
angular.forEach($scope.atp, function (value, key) {
value.email = value.email.toLowerCase();
});
}
})
.controller("atpSecondCtrl", function ($scope) {
$scope.namesEmailsAndBirthplaceToUpperCase = function () {
$scope.namesToUpperCase();
$scope.namesAndEmailsToUpperCase();
angular.forEach($scope.atp, function (value, key) {
value.birthplace = value.birthplace.toUpperCase();
});
}
$scope.namesEmailsAndBirthplaceToLowerCase = function () {
$scope.namesToLowerCase();
$scope.namesAndEmailsToLowerCase();
angular.forEach($scope.atp, function (value, key) {
value.birthplace = value.birthplace.toLowerCase();
});
}
});
</script>
</head>
<body ng-controller="atpMainCtrl">
<div>
<div id="atpMainPanel" class="panel">
<h4 class="panel-header">ATP SINGLES RANKINGS (main controller)</h4>
<table class="table">
<thead>
<tr>
<th>Name</th>
<th>E-mail</th>
<th>Birthplace</th>
</tr>
</thead>
<tbody>
<tr ng-repeat="item in atp">
<td>{{item.name}}</td>
<td>{{item.email}}</td>
<td>{{item.birthplace}}</td>
</tr>
</tbody>
</table>
<button class="btn btn-default" type="button" ng-click="namesToUpperCase()">Names To Upper Case</button>
<button class="btn btn-default" type="button" ng-click="namesToLowerCase()">Names To Lower Case</button>
</div>
</div>
<div ng-controller="atpFirstCtrl">
<div id="atpFirstPanel" class="panel">
<h4 class="panel-header">ATP SINGLES RANKINGS (first controller inherits main controller)</h4>
<table class="table">
<thead>
<tr>
<th>Name</th>
<th>E-mail</th>
<th>Birthplace</th>
</tr>
</thead>
<tbody>
<tr ng-repeat="item in atp">
<td>{{item.name}}</td>
<td>{{item.email}}</td>
<td>{{item.birthplace}}</td>
</tr>
</tbody>
</table>
<button class="btn btn-default" type="button" ng-click="namesAndEmailsToUpperCase()">Names And E-mails To Upper
Case
</button>
<button class="btn btn-default" type="button" ng-click="namesAndEmailsToLowerCase()">Names And E-mails To Lower
Case
</button>
</div>
<div ng-controller="atpSecondCtrl">
<div id="atpSecondPanel" class="panel">
<h4 class="panel-header">ATP SINGLES RANKINGS (second controller inherits first controller)</h4>
<table class="table">
<thead>
<tr>
<th>Name</th>
<th>E-mail</th>
<th>Birthplace</th>
</tr>
</thead>
<tbody>
<tr ng-repeat="item in atp">
<td>{{item.name}}</td>
<td>{{item.email}}</td>
<td>{{item.birthplace}}</td>
</tr>
</tbody>
</table>
<button class="btn btn-default" type="button" ng-click="namesEmailsAndBirthplaceToUpperCase()">Names,
E-mails
And Birthplaces To Upper
Case
</button>
<button class="btn btn-default" type="button" ng-click="namesEmailsAndBirthplaceToLowerCase()">Names,
E-mails
And Birthplaces To Lower
Case
</button>
</div>
</div>
</div>
</body>
</html>
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