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Merge pull request #87 from snuhcs-course/feat/guide-screen
Feat/guide-screen
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frontend/app/src/main/java/com/example/speechbuddy/compose/utils/GuideScreen.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,241 @@ | ||
| package com.example.speechbuddy.compose.utils | ||
|
|
||
| import androidx.compose.foundation.ExperimentalFoundationApi | ||
| import androidx.compose.foundation.Image | ||
| import androidx.compose.foundation.background | ||
| import androidx.compose.foundation.clickable | ||
| import androidx.compose.foundation.layout.Arrangement | ||
| import androidx.compose.foundation.layout.Box | ||
| import androidx.compose.foundation.layout.Column | ||
| import androidx.compose.foundation.layout.PaddingValues | ||
| import androidx.compose.foundation.layout.Spacer | ||
| import androidx.compose.foundation.layout.aspectRatio | ||
| import androidx.compose.foundation.layout.fillMaxHeight | ||
| import androidx.compose.foundation.layout.fillMaxSize | ||
| import androidx.compose.foundation.layout.fillMaxWidth | ||
| import androidx.compose.foundation.layout.height | ||
| import androidx.compose.foundation.layout.size | ||
| import androidx.compose.foundation.layout.width | ||
| import androidx.compose.foundation.lazy.LazyListScope | ||
| import androidx.compose.foundation.lazy.LazyRow | ||
| import androidx.compose.foundation.lazy.rememberLazyListState | ||
| import androidx.compose.foundation.pager.HorizontalPager | ||
| import androidx.compose.foundation.pager.PagerState | ||
| import androidx.compose.foundation.pager.rememberPagerState | ||
| import androidx.compose.foundation.shape.CircleShape | ||
| 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.runtime.rememberCoroutineScope | ||
| import androidx.compose.ui.Alignment | ||
| import androidx.compose.ui.Modifier | ||
| import androidx.compose.ui.draw.clip | ||
| import androidx.compose.ui.graphics.Color | ||
| import androidx.compose.ui.graphics.Shape | ||
| import androidx.compose.ui.graphics.graphicsLayer | ||
| import androidx.compose.ui.platform.LocalDensity | ||
| import androidx.compose.ui.res.painterResource | ||
| import androidx.compose.ui.res.stringResource | ||
| import androidx.compose.ui.unit.Dp | ||
| import androidx.compose.ui.unit.dp | ||
| import androidx.compose.ui.window.Dialog | ||
| import androidx.compose.ui.window.DialogProperties | ||
| import com.example.speechbuddy.R | ||
| import kotlinx.coroutines.launch | ||
|
|
||
| val pages = listOf<@Composable () -> Unit>( | ||
| { | ||
| GuideScreenPage( | ||
| imageId = R.drawable.bottom_navigation_bar_description, | ||
| contentDescriptionId = R.string.guide_screen_bottom_navigation_bar | ||
| ) | ||
| }, | ||
| { | ||
| GuideScreenPage( | ||
| imageId = R.drawable.symbol_selection_screen_description, | ||
| contentDescriptionId = R.string.guide_screen_symbol_selection_screen | ||
| ) | ||
| }, | ||
| { | ||
| GuideScreenPage( | ||
| imageId = R.drawable.text_to_speech_screen_description, | ||
| contentDescriptionId = R.string.guide_screen_text_to_speech_screen | ||
| ) | ||
| }, | ||
| { | ||
| GuideScreenPage( | ||
| imageId = R.drawable.symbol_creation_screen_description, | ||
| contentDescriptionId = R.string.guide_screen_symbol_creation_screen | ||
| ) | ||
| } | ||
| ) | ||
| val pageSize: Int = pages.size | ||
|
|
||
| @Composable | ||
| fun GuideScreenPage( | ||
| imageId: Int, | ||
| contentDescriptionId: Int | ||
| ) { | ||
| Column( | ||
| modifier = Modifier | ||
| .fillMaxSize(), | ||
| verticalArrangement = Arrangement.Center | ||
| ) { | ||
| Image( | ||
| painter = painterResource(id = imageId), | ||
| contentDescription = stringResource(id = contentDescriptionId), | ||
| modifier = Modifier | ||
| .fillMaxWidth() | ||
| .aspectRatio(10f / 19f) // image width-height ratio | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| @Composable | ||
| fun GuideScreen( | ||
| onDismissRequest: () -> Unit | ||
| ) { | ||
| Dialog( | ||
| onDismissRequest = onDismissRequest, | ||
| properties = DialogProperties( | ||
| usePlatformDefaultWidth = false // Allow custom width | ||
| ) | ||
| ) { | ||
| GuideScreenPageList() | ||
| } | ||
| } | ||
|
|
||
| @OptIn(ExperimentalFoundationApi::class) | ||
| @Composable | ||
| private fun GuideScreenPageList() { | ||
| Column( | ||
| modifier = Modifier | ||
| .fillMaxWidth(0.85f), | ||
| verticalArrangement = Arrangement.Center, | ||
| horizontalAlignment = Alignment.CenterHorizontally | ||
| ) { | ||
| val pagerState = rememberPagerState( | ||
| initialPage = 0, | ||
| initialPageOffsetFraction = 0f | ||
| ) { | ||
| pageSize | ||
| } | ||
| val coroutineScope = rememberCoroutineScope() | ||
|
|
||
| HorizontalPager( | ||
| state = pagerState, | ||
| verticalAlignment = Alignment.CenterVertically | ||
| ) { page -> | ||
| Box( | ||
| modifier = Modifier | ||
| .fillMaxHeight(0.85f) | ||
| .fillMaxWidth(), | ||
| contentAlignment = Alignment.Center | ||
| ) { | ||
| pages[page]() | ||
| } | ||
| } | ||
|
|
||
| Spacer(modifier = Modifier.height(25.dp)) | ||
|
|
||
| PagerIndicator(pagerState = pagerState) { | ||
| coroutineScope.launch { | ||
| pagerState.scrollToPage(it) | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| @OptIn(ExperimentalFoundationApi::class) | ||
| @Composable | ||
| fun PagerIndicator( | ||
| modifier: Modifier = Modifier, | ||
| pagerState: PagerState, | ||
| indicatorCount: Int = pageSize, | ||
| indicatorSize: Dp = 16.dp, | ||
| indicatorShape: Shape = CircleShape, | ||
| space: Dp = 8.dp, | ||
| activeColor: Color = Color(0xffEC407A), | ||
| inActiveColor: Color = Color.LightGray, | ||
| onClick: ((Int) -> Unit)? = null | ||
| ) { | ||
|
|
||
| val listState = rememberLazyListState() | ||
|
|
||
| val totalWidth: Dp = indicatorSize * indicatorCount + space * (indicatorCount - 1) | ||
| val widthInPx = LocalDensity.current.run { indicatorSize.toPx() } | ||
|
|
||
| val currentItem by remember { | ||
| derivedStateOf { | ||
| pagerState.currentPage | ||
| } | ||
| } | ||
|
|
||
| val itemCount = pagerState.pageCount | ||
|
|
||
| LaunchedEffect(key1 = currentItem) { | ||
| val viewportSize = listState.layoutInfo.viewportSize | ||
| listState.animateScrollToItem( | ||
| currentItem, | ||
| (widthInPx / 2 - viewportSize.width / 2).toInt() | ||
| ) | ||
| } | ||
|
|
||
| LazyRow( | ||
| modifier = modifier.width(totalWidth), | ||
| state = listState, | ||
| contentPadding = PaddingValues(vertical = space), | ||
| horizontalArrangement = Arrangement.spacedBy(space), | ||
| userScrollEnabled = false | ||
| ) { | ||
| indicatorItems( | ||
| itemCount, | ||
| currentItem, | ||
| indicatorShape, | ||
| activeColor, | ||
| inActiveColor, | ||
| indicatorSize, | ||
| onClick | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| private fun LazyListScope.indicatorItems( | ||
| itemCount: Int, | ||
| currentItem: Int, | ||
| indicatorShape: Shape, | ||
| activeColor: Color, | ||
| inActiveColor: Color, | ||
| indicatorSize: Dp, | ||
| onClick: ((Int) -> Unit)? | ||
| ) { | ||
| items(itemCount) { index -> | ||
|
|
||
| val isSelected = (index == currentItem) | ||
|
|
||
| Box( | ||
| modifier = Modifier | ||
| .graphicsLayer { | ||
| val scale = 1f | ||
| scaleX = scale | ||
| scaleY = scale | ||
| } | ||
| .clip(indicatorShape) | ||
| .size(indicatorSize) | ||
| .background( | ||
| if (isSelected) activeColor else inActiveColor, | ||
| indicatorShape | ||
| ) | ||
| .then( | ||
| if (onClick != null) { | ||
| Modifier | ||
| .clickable { | ||
| onClick.invoke(index) | ||
| } | ||
| } else Modifier | ||
| ) | ||
| ) | ||
| } | ||
| } |
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frontend/app/src/main/res/drawable/bottom_navigation_bar_description.png
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frontend/app/src/main/res/drawable/symbol_creation_screen_description.png
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frontend/app/src/main/res/drawable/text_to_speech_screen_description.png
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