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build: remove viewpagerdotsindicator module (#3936)
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119 changes: 119 additions & 0 deletions
119
commons/src/main/java/org/dhis2/commons/ui/PagerIndicator.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,119 @@ | ||
| package org.dhis2.commons.ui | ||
|
|
||
| import androidx.compose.animation.core.animateDpAsState | ||
| import androidx.compose.foundation.ExperimentalFoundationApi | ||
| import androidx.compose.foundation.background | ||
| import androidx.compose.foundation.layout.Arrangement | ||
| import androidx.compose.foundation.layout.Box | ||
| import androidx.compose.foundation.layout.Column | ||
| import androidx.compose.foundation.layout.fillMaxSize | ||
| import androidx.compose.foundation.layout.height | ||
| import androidx.compose.foundation.layout.padding | ||
| import androidx.compose.foundation.layout.size | ||
| import androidx.compose.foundation.layout.width | ||
| import androidx.compose.foundation.lazy.LazyListState | ||
| import androidx.compose.foundation.lazy.LazyRow | ||
| import androidx.compose.foundation.lazy.rememberLazyListState | ||
| import androidx.compose.foundation.pager.HorizontalPager | ||
| import androidx.compose.foundation.pager.rememberPagerState | ||
| import androidx.compose.foundation.shape.CircleShape | ||
| import androidx.compose.material3.Text | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.LaunchedEffect | ||
| 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.tooling.preview.Preview | ||
| import androidx.compose.ui.unit.dp | ||
| import kotlin.math.max | ||
|
|
||
| @OptIn(ExperimentalFoundationApi::class) | ||
| @Preview(showBackground = true, backgroundColor = 0xFFFFFFFF) | ||
| @Composable | ||
| fun PagerIndicatorScreen() { | ||
| Column( | ||
| modifier = Modifier.fillMaxSize(), | ||
| horizontalAlignment = Alignment.CenterHorizontally, | ||
| ) { | ||
| val pageCount = 2 | ||
| val pagerState = rememberPagerState( | ||
| pageCount = { pageCount }, | ||
| ) | ||
| HorizontalPager( | ||
| state = pagerState, | ||
| modifier = Modifier | ||
| .fillMaxSize() | ||
| .weight(1f), | ||
| ) { | ||
| Box( | ||
| modifier = Modifier | ||
| .fillMaxSize(), | ||
| contentAlignment = Alignment.Center, | ||
| ) { | ||
| Text(text = "Page $it") | ||
| } | ||
| } | ||
| PagerIndicator( | ||
| pageCount = pageCount, | ||
| currentPage = pagerState.currentPage, | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| @Composable | ||
| fun PagerIndicator( | ||
| indicatorScrollState: LazyListState = rememberLazyListState(), | ||
| pageCount: Int, | ||
| currentPage: Int, | ||
| dotIndicatorColor: Color = Color.DarkGray, | ||
| ) { | ||
| LaunchedEffect(key1 = currentPage) { | ||
| val size = indicatorScrollState.layoutInfo.visibleItemsInfo.size | ||
| val lastVisibleIndex = | ||
| indicatorScrollState.layoutInfo.visibleItemsInfo.lastOrNull()?.index ?: 0 | ||
| val firstVisibleItemIndex = indicatorScrollState.firstVisibleItemIndex | ||
|
|
||
| if (currentPage > lastVisibleIndex - 1) { | ||
| indicatorScrollState.animateScrollToItem(currentPage - size + 2) | ||
| } else if (currentPage <= firstVisibleItemIndex + 1) { | ||
| indicatorScrollState.animateScrollToItem(max(currentPage - 1, 0)) | ||
| } | ||
| } | ||
|
|
||
| LazyRow( | ||
| state = indicatorScrollState, | ||
| modifier = Modifier | ||
| .height(50.dp) | ||
| .width(((6 + 16) * 2 + 3 * (10 + 16)).dp), // I'm hard computing it to simplify | ||
| horizontalArrangement = Arrangement.Center, | ||
| verticalAlignment = Alignment.CenterVertically, | ||
| ) { | ||
| repeat(pageCount) { iteration -> | ||
| val color = if (currentPage == iteration) dotIndicatorColor else Color.LightGray | ||
| item(key = "item$iteration") { | ||
| val firstVisibleIndex by remember { derivedStateOf { indicatorScrollState.firstVisibleItemIndex } } | ||
| val lastVisibleIndex = | ||
| indicatorScrollState.layoutInfo.visibleItemsInfo.lastOrNull()?.index ?: 0 | ||
| val size by animateDpAsState( | ||
| targetValue = when (iteration) { | ||
| currentPage -> 10.dp | ||
| in firstVisibleIndex + 1..<lastVisibleIndex -> 10.dp | ||
| else -> 6.dp | ||
| }, | ||
| label = "PagerIndicatorDotSizeAnimation", | ||
| ) | ||
| Box( | ||
| modifier = Modifier | ||
| .padding(all = 8.dp) | ||
| .background(color = color, CircleShape) | ||
| .size( | ||
| size, | ||
| ), | ||
| ) | ||
| } | ||
| } | ||
| } | ||
| } |
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