使用1.0.0-beta04，您可以使用Canvas中的**pointerInput修改器，通过detectDragGestures**函数控制拖动手势，保存Offset并将其应用于drawRect的topLeft参数中。

var offsetX by remember { mutableStateOf(0f) }
var offsetY by remember { mutableStateOf(0f) }

Canvas(modifier = Modifier.fillMaxSize()
        .pointerInput(Unit) {
            detectDragGestures { change, dragAmount ->
                change.consumeAllChanges()
                offsetX += dragAmount.x
                offsetY += dragAmount.y
            }
        }
    ){
    val canvasQuadrantSize = size / 2F
    drawRect(
        topLeft = Offset(offsetX,offsetY),
        color = Color.Green,
        size = canvasQuadrantSize
    )
}