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223 changes: 223 additions & 0 deletions
223
...ain/java/net/kwmt27/jetpackcomposeplayground/list/instagram/InstagramSearchListLayout2.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,223 @@ | ||
| package net.kwmt27.jetpackcomposeplayground.list.instagram | ||
|
|
||
| import android.util.Log | ||
| import androidx.compose.foundation.background | ||
| import androidx.compose.foundation.layout.Arrangement | ||
| import androidx.compose.foundation.layout.Box | ||
| import androidx.compose.foundation.layout.BoxWithConstraints | ||
| import androidx.compose.foundation.layout.Column | ||
| import androidx.compose.foundation.layout.Row | ||
| import androidx.compose.foundation.layout.fillMaxWidth | ||
| import androidx.compose.foundation.layout.size | ||
| import androidx.compose.foundation.lazy.LazyColumn | ||
| import androidx.compose.foundation.lazy.LazyListState | ||
| import androidx.compose.foundation.lazy.itemsIndexed | ||
| import androidx.compose.foundation.lazy.rememberLazyListState | ||
| import androidx.compose.material.Text | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.derivedStateOf | ||
| import androidx.compose.runtime.getValue | ||
| import androidx.compose.runtime.remember | ||
| import androidx.compose.ui.Alignment | ||
| import androidx.compose.ui.Modifier | ||
| import androidx.compose.ui.graphics.Color | ||
| import androidx.compose.ui.text.TextStyle | ||
| import androidx.compose.ui.tooling.preview.Preview | ||
| import androidx.compose.ui.unit.Dp | ||
| import androidx.compose.ui.unit.dp | ||
| import androidx.compose.ui.unit.sp | ||
| import net.kwmt27.jetpackcomposeplayground.ui.theme.JetpackComposePlayGroundTheme | ||
|
|
||
| private const val TAG = "InstagramSearchList" | ||
|
|
||
| @Composable | ||
| fun SampleInstagramSearchListLayout2() { | ||
| InstagramSearchListLayout(GridListData.createData()) | ||
| } | ||
|
|
||
| @Composable | ||
| private fun InstagramSearchListLayout( | ||
| gridListData: GridListData, | ||
| ) { | ||
| val listState = rememberLazyListState() | ||
| // OK例 | ||
| val playMovieIndex by remember { | ||
| derivedStateOf { | ||
| if (listState.firstVisibleItemScrollOffset == 0) { | ||
| listState.firstVisibleItemIndex | ||
| } else { | ||
| listState.firstVisibleItemIndex + 1 | ||
| } | ||
| } | ||
| } | ||
| BoxWithConstraints { | ||
| LazyColumn( | ||
| modifier = Modifier | ||
| .fillMaxWidth(), | ||
| verticalArrangement = Arrangement.spacedBy(1.dp), | ||
| state = listState, | ||
| ) { | ||
| itemsIndexed(gridListData.list) { index, gridRowData -> | ||
| val moviePosition = if (index % 2 == 0) { | ||
| MoviePosition.RIGHT | ||
| } else { | ||
| MoviePosition.LEFT | ||
| } | ||
| GridRowItem( | ||
| gridRowData = gridRowData, | ||
| width = maxWidth / 3, | ||
| moviePosition = moviePosition, | ||
| listState = listState, | ||
| index = index, | ||
| // // [isPlay]はスクロールの状態によって変化するため、 | ||
| // // Booleanを直接渡すと、recomposeされてしまう。 | ||
| // // そのため、関数を渡すことによりCompositionを防ぐ | ||
| isPlay = index == playMovieIndex | ||
| ) | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| @Composable | ||
| private fun GridRowItem( | ||
| gridRowData: GridRowData, | ||
| width: Dp, | ||
| moviePosition: MoviePosition, | ||
| listState: LazyListState, | ||
| index: Int, | ||
| isPlay: Boolean, | ||
| ) { | ||
| // val playMovieIndex by remember { | ||
| // derivedStateOf { | ||
| // if (listState.firstVisibleItemScrollOffset == 0) { | ||
| // listState.firstVisibleItemIndex | ||
| // } else { | ||
| // listState.firstVisibleItemIndex + 1 | ||
| // } | ||
| // } | ||
| // } | ||
| // | ||
| // val isPlay = { playMovieIndex ==index } | ||
| /** | ||
| * [item][item][ItemImage] | ||
| * [item][item] --- | ||
| */ | ||
| val itemImageDataList: List<List<ItemData>> = gridRowData.list.take(4).chunked(2) | ||
| val itemMovieData = gridRowData.list.last() | ||
|
|
||
| Row( | ||
| horizontalArrangement = Arrangement.spacedBy(1.dp), | ||
| ) { | ||
| if (moviePosition == MoviePosition.LEFT) { | ||
| ItemMovie(itemMovieData, width, isPlay) | ||
| // ItemMovie(itemMovieData, width, listState, index) | ||
| } | ||
| GridItemImages(itemImageDataList, width) | ||
|
|
||
| if (moviePosition == MoviePosition.RIGHT) { | ||
| ItemMovie(itemMovieData, width, isPlay) | ||
| // ItemMovie(itemMovieData, width, listState, index) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| @Composable | ||
| private fun GridItemImages( | ||
| itemImageDataList: List<List<ItemData>>, | ||
| width: Dp, | ||
| ) { | ||
| Column( | ||
| verticalArrangement = Arrangement.spacedBy(1.dp) | ||
| ) { | ||
| itemImageDataList.forEach { itemImageData -> | ||
| Row( | ||
| horizontalArrangement = Arrangement.spacedBy(1.dp) | ||
| ) { | ||
| itemImageData.forEach { itemData -> | ||
| ItemImage(itemData, width) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| @Composable | ||
| private fun ItemImage(item: ItemData, width: Dp) { | ||
| Box( | ||
| modifier = Modifier | ||
| .size(width = width, height = width) | ||
| .background(color = Color.Gray), | ||
| contentAlignment = Alignment.Center | ||
| ) { | ||
| Text( | ||
| text = "${item.id} 画像", | ||
| style = TextStyle(fontSize = 20.sp, color = Color.White) | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| @Composable | ||
| private fun ItemMovie(item: ItemData, width: Dp, isPlay: Boolean) { | ||
| Log.d(TAG, "ItemMovie: id=${item.id}, isPlay=${isPlay}") | ||
| val color = if (isPlay) Color.Green else Color.Red | ||
| Column( | ||
| modifier = Modifier | ||
| .size(width = width, height = width * 2 + 1.dp) | ||
| .background(color = color), | ||
| verticalArrangement = Arrangement.Center, | ||
| horizontalAlignment = Alignment.CenterHorizontally | ||
| ) { | ||
| Text( | ||
| text = "${item.id} 動画", | ||
| style = TextStyle(fontSize = 20.sp, color = Color.White) | ||
| ) | ||
| val text = if (isPlay) "Playing" else "Stop" | ||
| Text( | ||
| text = text, | ||
| style = TextStyle(fontSize = 20.sp, color = Color.White) | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| @Composable | ||
| private fun ItemMovie(item: ItemData, width: Dp, listState: LazyListState, index: Int) { | ||
| val isPlay by remember { | ||
| derivedStateOf { | ||
| val firstVisibleItemIndex = if (listState.firstVisibleItemScrollOffset == 0) { | ||
| listState.firstVisibleItemIndex | ||
| } else { | ||
| listState.firstVisibleItemIndex + 1 | ||
| } | ||
| firstVisibleItemIndex == index | ||
| } | ||
| } | ||
|
|
||
| Log.d(TAG, "ItemMovie: id=${item.id}, isPlay=${isPlay}") | ||
| val color = if (isPlay) Color.Green else Color.Red | ||
| Column( | ||
| modifier = Modifier | ||
| .size(width = width, height = width * 2 + 1.dp) | ||
| .background(color = color), | ||
| verticalArrangement = Arrangement.Center, | ||
| horizontalAlignment = Alignment.CenterHorizontally | ||
| ) { | ||
| Text( | ||
| text = "${item.id} 動画", | ||
| style = TextStyle(fontSize = 20.sp, color = Color.White) | ||
| ) | ||
| val text = if (isPlay) "Playing" else "Stop" | ||
| Text( | ||
| text = text, | ||
| style = TextStyle(fontSize = 20.sp, color = Color.White) | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| @Preview(showBackground = true, device = "spec:width=320dp,height=640dp") | ||
| @Composable | ||
| private fun PreviewInstagramSearchList2() { | ||
| JetpackComposePlayGroundTheme { | ||
| SampleInstagramSearchListLayout2() | ||
| } | ||
| } |
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