What's the best way to bind a color to the backgro...

# tornadofx

[camdenorrb]

What's the best way to bind a color to the background of a view?

[Ruckus]

You can't, as the view can have any number of backgrounds, and the backgrounds can be any paint, not just colors.

[Ruckus]

You could instead create a separate color property and bind both the background and your other property to it.

[Ruckus]

(Though I admit that's easier said than done. It's probably easier to add a listener to the original property that updates the background of the view on change)

[camdenorrb]

Yeah, but how would I change the color at that point?

[Ruckus]

What do you mean?

[camdenorrb]

@Ruckus "updates the background of the view on change"

[camdenorrb]

How would that look

[Ruckus]

Something like this:

colorProperty.addListener { _, _, new ->
    node.background = Background(BackgroundFill(new, null, null))
}

[camdenorrb]

Yikes

[Ruckus]

It's a bit ugly due to the issues with background I mentioned above. I think we may have a helper so you could instead use

node.background = new?.asBackground()

But I don't remember for sure.

[camdenorrb]

What extension is that for?

[camdenorrb]

Like what class

[Ruckus]

I believe it's an extension on Paint (so it works on colors), but I don't remember for sure. I'd have to look it up.

[camdenorrb]

Appears to be a thing :3

[Ruckus]

I actually have a "converting binding" I've used in the past for this very purpose, but it was a bit of a hack, so I don't want to add it to TornadoFX. It allowed you to use

backgroundProperty.bindBidirectional(colorProperty, ColorBackgroundConverter)

[camdenorrb]

Oooo

[camdenorrb]

A bit too specific tho

[camdenorrb]

Actually, nah that's kinda cool

[Ruckus]

You can create any converter you want and bind any two properties.

[camdenorrb]

Ok =^-^=, thank you for your time ❤️