Button4.kt

@Composable
fun ButtonContainer(){
    val buttonBorderGradient = Brush.horizontalGradient(listOf(Color.Yellow, Color.Red))
    // remember{ } : 변경이 발생하면 뷰를 다시 그린다.
    val interactionSource = remember { MutableInteractionSource() }
    val isPressed by interactionSource.collectIsPressedAsState()
    val pressStatusTitle = if(isPressed) "버튼을 누르고 있다" else "버튼에서 손을 뗐다."
    
    Button(
        elevation = ButtonDefaults.elevation(
            defaultElevation = 10.dp,
            pressedElevation = 0.dp,
            disabledElevation = 0.dp
        ),
        enabled = true,
        shape = RoundedCornerShape(10.dp),
        border = BorderStroke(4.dp, buttonBorderGradient),
        colors = ButtonDefaults.buttonColors(
            backgroundColor = Color.Black,
            disabledBackgroundColor = Color.LightGray
        ),
        interactionSource = interactionSource,
        onClick = {
            Log.d("TAG","Button 4가 클릭 되었다.")
        }) {
        Text(text = "Button 4", color = Color.White)
    }

    Text(text = pressStatusTitle)
}