Controlling Model Item Opacity Using Toggle Button

You would need to tie the 'pressed' event to the opacity of the model-item. You can use an application parameter and a simple javascript function to achieve this.

I ran a small test to confirm this would work. I created an app parameter called 'OpacityMI' and bound it to the model item opacity. in Home.JS I added this function:

$scope.changeOpacity = function(){
 
 $scope.app.params.OpacityMI = .5;
};

I then called this function on the 'Pressed' event for the toggle button and was able to see the opacity change.