I wanted to move some code out of my Composable, a...

# compose

[Nat Strangerweather]

I wanted to move some code out of my Composable, as a function, to make my code generally clearer, but I have trouble referencing the drawLine method of my CanvasDrawScope as a parameter. I thought it would be a Unit, but no success. I am putting the snippet in the thread. Any ideas or is it best to keep all that code within the Composable?

[Nat Strangerweather]

fun drawDynamicGrid(
    listOfWords: List<String>,
    bitmapWidth: Float,
    bitMapHeight: Float,
drawLine: // what to put here as Type?
) {
    // Dynamic Grid
    val spacingX = 150f
    val spacingY = 70f

    var anchorX = spacingX
    var anchorY = spacingY

    while (anchorX < getWordCount(listOfWords)) {
        drawLine(
            strokeWidth = 2F, color = Color.White, start = Offset(anchorX, 0f),
            end = Offset(anchorX, bitMapHeight)
        )
        anchorX += spacingX
    }

    while (anchorY < 2) {
        drawLine(
            strokeWidth = 2F, color = Color.White, start = Offset(0f, anchorY),
            end = Offset(bitmapWidth, anchorY)
        )
        anchorY += spacingY
    }
}

[loloof64]

Maybe could you try an extension function of DrawScope ?

fun DrawScope.drawline(...) {
}

[loloof64]

Then inside the drawDynamicGrid you can call drawline .

[Nat Strangerweather]

Sounds good, many thanks!

[Nat Strangerweather]

@loloof64 I am struggling with this. The drawLine remains red. Would you please be able to have a look?

[loloof64]

Hi ! Are you calling the code from inside a Canvas or a call to Modifier.drawBehind ? If so, we may find a workaround.

[loloof64]

Then all you have to do is to simply replace DrawScope.drawline( by just drawline , in both calls to drawline .

[Nat Strangerweather]

Hi, well I am using this:

CanvasDrawScope().draw(
            Density(1.0f), LayoutDirection.Ltr, canvas,
            Size(bitmapWidth, bitMapHeight),
        ) {

[loloof64]

Are you calling the code above from inside CanvasDrawScope ? If so, you can simply call drawLine each time (without the `DrawScope.`prefix)

[Nat Strangerweather]

I was calling it from a button

[Nat Strangerweather]

not inside CanvasDrawScope

[loloof64]

Ah. Then what I said cannot work.

[Nat Strangerweather]

ah ok, in that case I'll try things differently.

[Nat Strangerweather]

Thanks for your help!

[loloof64]

No problem. Sorry for having pointed you in the wrong direction.

[Nat Strangerweather]

No, you probably didn't! 🙂