What is the alternative for

dragGestureFilter

with

startDragImmediately = true

since it was deprecated?

You could do something like this: https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:compose/[…]roidx/compose/ui/demos/gestures/RawDragGestureDetectorDemo.kt

Thanks a lot for the information, I have it working now. It looks like this:

.pointerInput(Unit) {
    fun updateColor(position: Offset) {
        TODO()
    }
    forEachGesture {
        awaitPointerEventScope {
            val down = awaitFirstDown(requireUnconsumed = false)
            updateColor(down.position)
            down.consumeAllChanges()
            drag(down.id) { change ->
                updateColor(change.position)
                change.consumeAllChanges()
            }
        }
    }
}

Consuming the down event prevents it from being read by other gesture detectors. If you don't have to worry about gesture disambiguation, then consuming the down is a good idea. If you had a button under it, you would see the ripple on the press if you didn't consume the down. Most gesture detectors have to worry about disambiguation and don't consume the down because they aren't sure if they will be the one acting. You're doing it right. When you consume a pointer input, you're essentially telling all the other gesture detectors, "Hands off, this gesture is mine."

I understand now, thanks for the very detailed explanation, George.