What is the limitation of "Application Parameters"?

Hi, Samuel

Thanks you for replying.

Frankly speaking, the question has been simplified.

It is a Thing on Thingworx which has 80 properties (boolean) need to be presented in Vuforia Studio.

Rather than binding 80 Widgets in Vuforia Studio with 80 properties on Thingworx. (update every 3sec)

I use Thingworx Service to generate a JSON (name: allStatus), than bind the allStatus to Vuforia Studio.

If allStatus  binds  to a Application Parameters:

>>> [object object] (type: string)

If allStatus  binds  to a Vuforia Studio Label Widget:

>>> everything works

In other words, I can get the job done with a Widget, just wondering if it is feasible without Widget.

Best Regards,

ClarK

In some cases, you can adapt the value or check it using the JSON.parse() or JSON.stringify() in the filter section of the binding.

example in the filter:

return JSON.parse(value);

as it was mentioned in the post :https://community.ptc.com/t5/Vuforia-Studio/How-to-use-List-in-ThingWorx-Studio/m-p/522911#M497

In some case when you are not sure what the value is  - in this case you use some construct like (redudnat check):

return JSON.parse(JSON.stringify(value));

converting first to string and then back to object hoping that this will check/ fix the syntax - of course this should be tested in the particular situation - e.g. 

$scope.app.params["ItemList"] = "";
 $scope.app.params["ItemList"] = JSON.parse(JSON.stringify(obj));//check

as metioned in https://community.ptc.com/t5/Vuforia-Studio/How-to-create-2D-3D-components-using-Javascript-from-a-array-of/m-p/662936

... or 

return angular.fromJson(value);

as mentioned in: https://community.ptc.com/t5/Vuforia-Studio/Can-t-use-more-than-one-sequence-animation-in-a-single/m-p/518235#M2355

Yes , I could reproduce this issue. Strange. I think this seem to be related that there is some delay when the JSON service is called so that when the parameter is initilized . For example when I test the following:

In this case the issue could be reproduced but  when some times later we click a button (button JS Box will call test() ) This  will set the data to the  parameter - then this works fine. Following sample code:

$scope.test=function() {
console.warn($scope.app.params['TESTJSON']);
 $scope.setWidgetProp('textArea-1','text',$scope.app.params['TESTJSON']);
}

So now when we click the button ->  data is passed fine to the applicaiton  parameter test and the parameter has also binding to the widget and the value is passed correctly form the parameter to the widget. Therefore I susspect that this is some issue  based on service delay where the value is not converted and passed  correctly 

So if you want to set a parameter with a JSON data which comes form TWX service -> the following workaround could be use /one possible option :

// this function will set the data to the parameter
// the function is called after the view is entered
$scope.init=function() {
 let result=$scope.app.mdl['TestRepository'].svc['testJson'].data;
 console.warn(result)
 $scope.app.params['TESTJSON']=JSON.stringify(result);
 $scope.$applyAsync();
};
//event which will call the function with a delay on start
$scope.$on('$ionicView.afterEnter', function() {
 
 $timeout(() => {
 $scope.init();
 },500)
})
// this will set manually the value form parameter to widget
$scope.test=function() {
console.warn($scope.app.params['TESTJSON']);
 $scope.setWidgetProp('textArea-1','text',$scope.app.params['TESTJSON']);
}
})

Here the values are set with some delay