【Android】Jetpack Compose 入門講座 第15回「リストのスクロール ②LazyRow」

package com.example.myapplication

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.annotation.DrawableRes
import androidx.compose.foundation.Image
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.lazy.LazyRow
import androidx.compose.foundation.lazy.items
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.material3.Text
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.layout.ContentScale
import androidx.compose.ui.res.painterResource
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import com.example.myapplication.ui.theme.MyApplicationTheme

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            MyApp()
        }
    }
}

@Composable
fun MyApp(modifier: Modifier = Modifier) {
    MyApplicationTheme {
        AnimalListRow()
    }
}

@Composable
fun AnimalListElement(
    @DrawableRes drawable: Int,
    text: String,
    modifier: Modifier = Modifier
) {
    Column(
        horizontalAlignment = Alignment.CenterHorizontally,
        modifier = modifier.padding(8.dp)
    ) {
        Image(
            painter = painterResource(id = drawable),
            contentDescription = text,
            contentScale = ContentScale.Crop,
            modifier = modifier
                .size(80.dp)
                .clip(CircleShape)
        )
        Text(
            text = text,
            modifier = modifier.padding(top = 4.dp)
        )
    }
}

private data class Animal(val drawable: Int, val text: String)
private val animalList = listOf(
    Animal(R.drawable.dog, "Dog"),
    Animal(R.drawable.cat, "Cat"),
    Animal(R.drawable.rabbit, "Rabbit"),
    Animal(R.drawable.lion, "Lion"),
    Animal(R.drawable.panda, "Panda"),
)

@Composable
fun AnimalListRow(modifier: Modifier = Modifier) {
    LazyRow {
        items(animalList) {
            AnimalListElement(drawable = it.drawable, text = it.text)
        }
    }
}

@Preview
@Composable
private fun AnimalListRowPreview() {
    MyApp()
}