The following code reads via a service and shows on the web page a list of 'page' objects for a specific 'page category' (string). Using the resolve object property in $routeProvider.when(), I am able to postpone updating the view until the new value is ready.
Two questions:
-
When asking for a new page list, I want to show a loading-icon. How can I detect (in a non-hackish way) the event when the reading from server starts (and the loading-icon should be displayed)? I guess I could do something like $('.pages-loading-icon').show() in the service, but find that to be too gui dependent too placed in the service.
-
When the new value is ready, I would like the old to fade out and the new to fade in. What is the 'angular' way to do this? I have tried to do it in the controller using $watch, but that causes the new value to be display shortly before the fadeout starts.
The code:
app.js:
$routeProvider.when('/:cat', { templateUrl: 'partials/view.html', controller: RouteCtrl, resolve: RouteCtrl.resolve});
controllers.js:
function RouteCtrl($scope, $routeParams, pages) {
$scope.params = $routeParams;
$scope.pages = pages;
}
RouteCtrl.resolve={
pages: function($routeParams, Pages){
if($routeParams.hasOwnProperty('cat')){
return Pages.query($routeParams.cat);
}
}
}
services.js: The last pages read is stored in currentPages and its category in lastCat.
factory('Pages', function($resource, $q, $timeout){
return {
res: $resource('jsonService/cat=:cat', {}, {
query: {method:'GET', params:{cat:'cat'}, isArray:true}
}),
lastCat: null,
currentPages: null,
query: function(cat) {
var res = this.res;
if(cat != this.lastCat){
var deferred = $q.defer();
var p = res.query({'cat':cat}, function(){
deferred.resolve(p);
});
this.lastCat = cat;
this.currentPages = deferred.promise;
}
return this.currentPages;
}
};
})
view.html
<ul >
<li ng-repeat="page in pages">
<a href="#{{params.cat}}/{{page.slug}}">{{page.title}}</a>
</li>
</ul>
$routeChangeError– Jan Aug 19 '13 at 10:15