How to load Rez resource dynamically?

View.findDrawableById is used to find drawables present in the active layout.

As far as I know it isn't possible to dynamically load the resource by means of a parameter.
The way I do it is with if-else or switch statements.

I must not understand the question.

A symbol is just an object type in the MonkeyC type system. You should be able to pass them around as you see fit. For example, this should work:

function dynamically_load_animation_layer(resourceId)
{
  return new WatchUi.AnimationLayer(resourceId, {:locX=>0, :locY=>0})
}

That should work just fine.

Provided you don't try to save symbols to application storage, you should be fine. Saving a symbol to app storage is a bad idea because the symbol id can change between compiles.

I think what the OP is trying to do, based on the fact that I would like to be able to do the same, is load a resource based on a setting or config or whatever that is coming from a database via API call. So, for example, if a user has their favourite colour set as "RED" that the app will load Rez.Drawables.Red, perhaps by constructing the string "Rez.Drawables.Red" and passing that in to the loadResource() method. However, as HermoT pointed out, the only way to do this is to use if-else or switch statements.

> perhaps by constructing the string "Rez.Drawables.Red" and passing that in to the loadResource() method

Yes. It is not possible to read a Symbol directly from an external source, so at some level you will have to map from an external value (setting/String//Number) to a Symbol.

Travis.ConnectIQ said:

at some level you will have to map from an external value (setting/String//Number) to a Symbol

and how do you do that? is it working also for images? I can not make it work

no, if you have resource

<drawables>
    <bitmap id="LauncherIcon" filename="launcher_icon.png" />
</drawables>

you load it

But i found out that 

2544375 said:

string = "Yellow"

symbol will be "Rez.Drawables.id_ms_"+string, so Rez.Drawables.id_ms_Yellow

As _psx_ pointed out, you can't generate a symbol from a string. You can store a symbol in a variable, and use it for an indirect lookup using square brackets. e.g. If y is a symbol variable, you can look up y in object x with x[y];

So the closest you can get to what you're looking for is something like this:

// Array which maps integers to symbols of image resources in Rez.Drawables
var imageSymbols = [
  :image_yellow, // 0
  :image_red, // 1
  :image_blue, // 2
  ...
];

var imageColor = ... // read enumerated value from somewhere (0 = yellow, 1 = red, etc.)

var image = WatchUi.loadResource(Rez.Drawables[imageSymbols[imageColor]]);

Are you sure it will run?

is :image_yellow points to Rez.Drawables.image_yellow?