Digital Workshop

Hi, I would like to move some image objects via script commands.

That works fine as long as I use the real image object names:



What I want to do is using a variable instead of the real name of every single image object.
So I tried this in various ways, which are obviously wrong:



Instead of moving the object "ball" I get an error message instead.

I think the reason for this could be that the move-function does not know or recognize that the variable myobjectname is an image object.
Unfortunately I have no idea how to achieve the desired result.

I hope someone can show me how to do this right.

Thanks

I think I found a solution by myself.

You have to use "eval" to achieve this:



In this way it works as it should.

Although I am glad that it works now, I am interested in WHY this is so.
I have to admit that I do not really understand what "eval" does.

Maybe someone of the experts can explain this in simple words? That would be great!

Eval is short for evaluation and basically attempts to 'run' the string within the brackets as if it were code.

In your first post - the "ball" in inverted commas, is simply a string and means nothing more to Opus than "apples", "oranges" or "pears".

ball.move(x,y) however references an object not a string. In this case, the object is an on screen object such as an image, vector or frame.

In order, for a variable to work with move(x,y), the variable needs to reference an object. Opus includes different ways of achieving this, including FindChild(). You can also use the 'this' keyword for example:

Add the following line to an on show trigger on the ball image:


As you have discovered, eval works, but it is not necessary the safest or best way to acquire an object. Understanding that objects are probably the most important aspect of Opus and definitely HTML5 programming will help you build better applications and you'll find I've posted quite in depth responses before on the topic.

</mack>

Mack, thank you very much for your help and the explanation.

With your help I could solve the problem without using eval().
I think it works even faster this way

Great support!