Ionic: How to check if it's the first screen - angularjs

Searching for this, but found no answer. I wanted to have a condition in Ionic/AngularJS that checked if it was the very first screen that opened, on application launch.
On a registerBackButtonAction action, I wanted to check for a specific state if it was the very first screen, or if it was an other moment of the lifecycle of the application.
Other suggestions for approaching the problem are welcome.
Thank you in advance.

You can use $ionicView.enter
$ionicView.enter : The view has fully entered and is now the active view. This event will fire, whether it was the first load or a cached view.
$scope.$on("$ionicView.enter", function(event, data){
// handle event or check state or whatever here
console.log("State Params: ", data.stateParams);
});
Hope it helps

Related

On scroll loading Mask EXT JS

I am trying to apply an enhancement on below code line. If anyone knows solution, please help me!
loaderMask = new CQ.Ext.LoadMask(CQ.Ext.getBody(), { msg:"Loading... Please wait"})
loaderMask.show();
This loader mask is fixed in the page position and I like to fix it on the user screen while user scrolls up or down on the page.
Thankyou!
That would be:
scrollPanel.getScrollable().on('scrollstart', function(){
scrollPanel.mask({message: 'scrolling'});
});
scrollPanel.getScrollable().on('scrollend', function(){
scrollPanel.unmask();
});
But it sounds more like, you are loading data and while loading you want to mask the container. If so you might want to listen to the beforeLoad and load event of the store and mask and unmask while it is loading.
The alternative is to use databinding to the store.loading.
If you want to know more about that, please setup a fiddle (fiddle.sencha.com).

Angular Material: Update Text Content in Toast

I am attempting to use $mdToast.updateTextContent() to update a toast and am unsuccessful. The docs don't go into detail on how to call it with a new message. My desire result would have the first toast display 'Adding account' then change to 'account successfully added'. Any help would be greatly appreciated.
I think the correct way to approach this using material design standards would be to only use the toast once the account has been added. The loading could be a spinner or maybe a loading bar (maybe like this http://materializecss.com/preloader.html)
Once the $mdToast is open, you're able to call updateTextContent (as you stated)
$scope.onAccountAdded = function() {
$mdToast.updateTextContent('Account successfully added')
};
We're watching the variable for changes and update the view automatically, once the value has changed.
https://github.com/angular/material/blob/master/src/components/toast/toast.js#L299
Here is a demo, which shows how it works.
http://codepen.io/DevVersion/pen/qNWewJ

Clear History and Reload Page on Login/Logout Using Ionic Framework

I am new to mobile application development with Ionic. On login and logout I need to reload the page, in order to refresh the data, however, $state.go('mainPage') takes the user back to the view without reloading - the controller behind it is never invoked.
Is there a way to clear history and reload the state in Ionic?
Welcome to the framework! Actually the routing in Ionic is powered by ui-router. You should probably check out this previous SO question to find a couple of different ways to accomplish this.
If you just want to reload the state you can use:
$state.go($state.current, {}, {reload: true});
If you actually want to reload the page (as in, you want to re-bootstrap everything) then you can use:
$window.location.reload(true)
Good luck!
I found that JimTheDev's answer only worked when the state definition had cache:false set. With the view cached, you can do $ionicHistory.clearCache() and then $state.go('app.fooDestinationView') if you're navigating from one state to the one that is cached but needs refreshing.
See my answer here as it requires a simple change to Ionic and I created a pull request: https://stackoverflow.com/a/30224972/756177
The correct answer:
$window.location.reload(true);
I have found a solution which helped me to get it done. Setting cache-view="false" on ion-view tag resolved my problem.
<ion-view cache-view="false" view-title="My Title!">
....
</ion-view>
Reload the page isn't the best approach.
you can handle state change events for reload data without reload the view itself.
read about ionicView life-cycle here:
http://blog.ionic.io/navigating-the-changes/
and handle the event beforeEnter for data reload.
$scope.$on('$ionicView.beforeEnter', function(){
// Any thing you can think of
});
In my case I need to clear just the view and restart the controller. I could get my intention with this snippet:
$ionicHistory.clearCache([$state.current.name]).then(function() {
$state.reload();
});
The cache still working and seems that just the view is cleared.
ionic --version says 1.7.5.
None of the solutions mentioned above worked for a hostname that is different from localhost!
I had to add notify: false to the list of options that I pass to $state.go, to avoid calling Angular change listeners, before $window.location.reload call gets called. Final code looks like:
$state.go('home', {}, {reload: true, notify: false});
>>> EDIT - $timeout might be necessary depending on your browser >>>
$timeout(function () {
$window.location.reload(true);
}, 100);
<<< END OF EDIT <<<
More about this on ui-router reference.
I was trying to do refresh page using angularjs when i saw websites i got confused but no code was working for the code then i got solution for reloading page using
$state.go('path',null,{reload:true});
use this in a function this will work.
I needed to reload the state to make scrollbars work. They did not work when coming through another state - 'registration'. If the app was force closed after registration and opened again, i.e. it went directly to 'home' state, the scrollbars worked. None of the above solutions worked.
When after registration, I replaced:
$state.go("home");
with
window.location = "index.html";
The app reloaded, and the scrollbars worked.
The controller is called only once, and you SHOULD preserve this logic model, what I usually do is:
I create a method $scope.reload(params)
At the beginning of this method I call $ionicLoading.show({template:..}) to show my custom spinner
When may reload process is finished, I can call $ionicLoading.hide() as a callback
Finally, Inside the button REFRESH, I add ng-click = "reload(params)"
The only downside of this solution is that you lose the ionic navigation history system
Hope this helps!
If you want to reload after view change you need to
$state.reload('state',{reload:true});
If you want to make that view the new "root", you can tell ionic that the next view it's gonna be the root
$ionicHistory.nextViewOptions({ historyRoot: true });
$state.go('app.xxx');
return;
If you want to make your controllers reload after each view change
app.config(function ($stateProvider, $urlRouterProvider, $ionicConfigProvider) {
$ionicConfigProvider.views.maxCache(0);
.state(url: '/url', controller: Ctl, templateUrl: 'template.html', cache: false)
cache: false ==> solved my problem !
As pointed out by #ezain reload controllers only when its necessary. Another cleaner way of updating data when changing states rather than reloading the controller is using broadcast events and listening to such events in controllers that need to update data on views.
Example: in your login/logout functions you can do something like so:
$scope.login = function(){
//After login logic then send a broadcast
$rootScope.$broadcast("user-logged-in");
$state.go("mainPage");
};
$scope.logout = function(){
//After logout logic then send a broadcast
$rootScope.$broadcast("user-logged-out");
$state.go("mainPage");
};
Now in your mainPage controller trigger the changes in the view by using the $on function to listen to broadcast within the mainPage Controller like so:
$scope.$on("user-logged-in", function(){
//update mainPage view data here eg. $scope.username = 'John';
});
$scope.$on("user-logged-out", function(){
//update mainPage view data here eg. $scope.username = '';
});
I tried many methods, but found this method is absolutely correct:
$window.location.reload();
Hope this help others stuck for days like me with version: angular 1.5.5, ionic 1.2.4, angular-ui-router 1.0.0

How do I listen to store's refresh event?

I'm using Sencha Touch 2 and wonder how I listen to the Store's refresh event in my Ext.dataview.List? I want that my list automatically updates when there are new records in my store, so the refresh event seems to do the job for me, but how do I set up a listener?
Edit: Thanks to Anand Gupta I realized my problem isn't refreshing the list but just displaying it. So I will give you some more information and hope you can help me. I use NavigationView inside tabpanel. I have one list loading from localstorage which works just fine, if you tap disclose indicator you come to a form with a button "auto complete".
By tapping autocomplete the following method is called:
e.stopEvent();
var lastname = this.getNewUserForm().down("textfield[name=lastname]").getValue();
if(lastname!=="")
{
var complete = this.getApplication().getController("Complete");
this.getUserNav().push(complete.getView());
complete.setSearch(this.getNewUserForm().down("textfield[name=firstname]").getValue(), lastname);
}
else
{
//errormessage
}
The getView() method is a ref with auto create and the "setSearch" Message on Complete Controller simply loads the Store through jsonP Proxy:
var store = Ext.getStore("Playernames");
store.setParams({firstname:firstname, lastname:lastname});
store.load({callback: function(){
console.log(this);
}});
I added a log to see that the store is properly loaded and store is properly loaded.
Thanks for help
Ok after some more hard search I found my bug: I had a List view embedded in a Panel with an undefined layout. So I changed the layout to "fit" and it works fine.

Intercepting all clicks with AngularJS to warn user of unsaved data

I have a lengthy form customers will need to fill out. If they click a link on a page, it will navigate away from that Controller and they will lose any data they may have already input.
If I can determine the form has not yet been saved, how can I intercept any click to the links on the page so I can ask the user if they want to save their form first?
No code yet- sorry. Many thanks.
I've written an angularjs directive that you can apply to any form that will automatically watch for changes and message the user if they reload the page or navigate away. #see https://github.com/facultymatt/angular-unsavedChanges
Hopefully you find this directive useful!
sorry for the late answer but mabye someone stumbles upon this and finds it useful. I have encountered the same problem and at the beginning i tryed to use the ng-dirty class applyed to the form element but because i had some custom controls the ng-bind won't be applyed when i changed some fields.
The best way i found so far is to detect when the model is changed with the use of $locationChangeStart event.
$scope.$on('$locationChangeStart', function (event, next, current) {
//we are about to leave the page so it's time to see if the form was modified by the user
if (!$scope.isFormClean())
{
event.preventDefault();
}
});

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