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kotlinlang

Do we have something for when we want to use one value for Preview and another one for Build?

You can provide any params you want for @previews

```class BaseDimensions  {
    companion object {
//        TODO("The commented lines should be used for real devices and their replacements are there to use Compose Preview")
        private const val testingWidth = 1440
        private const val testingDensity = 3.5f
//        private val displayMetrics = Common.appContext.resources.displayMetrics
        internal const val boardSize = 9
        private const val tilePaddingLeftRight = 4
        val tileSize =
//            (((displayMetrics.widthPixels / displayMetrics.density) - ((boardSize + 1) * tilePaddingLeftRight)) / boardSize).dp
            (((testingWidth / testingDensity) - ((boardSize + 1) * tilePaddingLeftRight)) / boardSize).dp
    }
}```
Here, when using preview, appContext wasn’t provided yet, so, if I’m not using regular builds, I need to comment everything and provide temporary values, which is kind of unpractical the way I’m doing

I was hoping for something like if(Compose) X else Y

If the state of your composables is properly hoistable, there is no reason for such a conditional. Moreover, such a conditional would inevitably lead to your previews that do not correctly demonstrate the expected/proper usage/behavior of your composables. The lack of such a conditional is very intentional, as it encourages you to more properly design your composable.

True about the proper expected behavior. Problem is that I'm dinamicaly sitting up my composables and I need window width. I tried other methods which ended in a messy ping ponging of updates a re-renders. The cleanest wya I found to dinamicaly draw my board was to previwsly know my screen width.

Problem with this is thst I need context. I found a method with a provider but the way this is initialized probably makes it not available when preview tries to use it and then I have a null.

This values yes are unriliable but they allow me to test the app without running it on a device every time.

If anyone would be interested <https://github.com/cicerohellmann/viking/blob/main/app/src/main/java/de/cicerohellmann/viking/BaseDimensions.kt|https://github.com/cicerohellmann/viking/blob/main/app/src/main/java/de/cicerohellmann/viking/BaseDimensions.kt>