Post by JimBoReee in Lil Programming Questions

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I want to use a slider in X card to copy # canvas image in Y then paste it in X canvas. Here's the code:

on change val do
   if me.value = #
      X.paste[deck.Y.widget.#.copy[]]
   end
end

But it doesn't work when I chage the slider value. Am I doing something wrong?

Internet Janitor2 days ago

"#" is not a valid Lil identifier; it is used in Lil scripts to indicate a comment, which ignores the remainder of the line. Lil identifiers are described in the Lil Reference Manual as follows:

Variable and function names may contain any alphanumeric characters (as well as ? and _), but must not start with a digit.

If you give a widget a name which is not a valid identifier, it will not be automatically available as a local variable, but it can be accessed by name from the card's ".widgets" dictionary:

card.widgets["#"]

Your description of what you're trying to do is inconsistent and unclear. If the idea is to- for example- index into images stored in a rich-text field named Y and paste the image corresponding to the value of the slider ("me") onto a canvas named X, you could use something like:

on change val do
 X.paste[Y.images[val]]
end

JimBoReee2 days ago (1 edit)

I'm using a slider to switch between images that I want to copy from one set of canvases into a single canvas. I'm not using a ritch text field.

Internet Janitor2 days ago (1 edit)

Presuming the canvases are on the same card and have a naming convention like "c1", "c2", "c3", "c4" and the slider is set to an integer range between 0 and 3 you could write something like

on change val do
 canvases:c1,c2,c3,c4
 X.paste[canvases[val].copy[]]
end

JimBoReee2 days ago

I ended up using a field anyways, lol.

That said, I got a new question, how do I script a button to add or subtract from the existing value of the slider?

Internet Janitor2 days ago(+1)

Presuming a slider named "slider1", you could give a button a script like

on click do
 slider1.value:slider1.value + 1
end

This situation is very similar to one of the examples in The Decker Guided Tour and one of the examples in the introductory primer in the Lil Reference Manual.

JimBoReee2 days ago(+1)

Thank you.

itch.io

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