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Merge pull request #753 from choi-woo-sung/companion_feature_702
add : add Medium TopBar
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...n/kotlin/io/github/droidkaigi/confsched/droidkaigiui/component/AnimatedMediumTopAppBar.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| package io.github.droidkaigi.confsched.droidkaigiui.component | ||
|
|
||
| import androidx.compose.animation.AnimatedVisibility | ||
| import androidx.compose.animation.ExitTransition | ||
| import androidx.compose.animation.fadeIn | ||
| import androidx.compose.foundation.layout.RowScope | ||
| import androidx.compose.foundation.layout.WindowInsets | ||
| import androidx.compose.foundation.layout.fillMaxWidth | ||
| import androidx.compose.foundation.layout.padding | ||
| import androidx.compose.material.icons.Icons.AutoMirrored.Filled | ||
| import androidx.compose.material.icons.automirrored.filled.ArrowBack | ||
| import androidx.compose.material3.ExperimentalMaterial3Api | ||
| import androidx.compose.material3.Icon | ||
| import androidx.compose.material3.IconButton | ||
| import androidx.compose.material3.MaterialTheme | ||
| import androidx.compose.material3.MediumTopAppBar | ||
| import androidx.compose.material3.Text | ||
| import androidx.compose.material3.TopAppBarColors | ||
| import androidx.compose.material3.TopAppBarDefaults | ||
| import androidx.compose.material3.TopAppBarScrollBehavior | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.getValue | ||
| import androidx.compose.runtime.mutableStateOf | ||
| import androidx.compose.runtime.remember | ||
| import androidx.compose.runtime.setValue | ||
| import androidx.compose.ui.Modifier | ||
| import androidx.compose.ui.draw.alpha | ||
| import androidx.compose.ui.layout.onGloballyPositioned | ||
| import androidx.compose.ui.platform.LocalDensity | ||
| import androidx.compose.ui.text.style.TextAlign | ||
| import androidx.compose.ui.unit.dp | ||
|
|
||
| @OptIn(ExperimentalMaterial3Api::class) | ||
| @Composable | ||
| fun AnimatedMediumTopAppBar( | ||
| title: String, | ||
| onBackClick: () -> Unit, | ||
| navIconContentDescription: String?, | ||
| modifier: Modifier = Modifier, | ||
| actions: @Composable RowScope.() -> Unit = {}, | ||
| windowInsets: WindowInsets = TopAppBarDefaults.windowInsets, | ||
| colors: TopAppBarColors = TopAppBarDefaults.largeTopAppBarColors().copy( | ||
| scrolledContainerColor = MaterialTheme.colorScheme.surfaceContainer, | ||
| ), | ||
| scrollBehavior: TopAppBarScrollBehavior? = null, | ||
| ) { | ||
| val density = LocalDensity.current.density | ||
| var navigationIconWidthDp by remember { mutableStateOf(0f) } | ||
| val isCenterTitle = remember(scrollBehavior?.state?.collapsedFraction) { | ||
| if (scrollBehavior == null) { | ||
| // Always left-align when scrollBehavior is not present | ||
| false | ||
| } else { | ||
| // Hide title position because it doesn't look smooth if it is displayed when collapsing | ||
| when (scrollBehavior.state.collapsedFraction) { | ||
| in 0.7f..1.0f -> true | ||
| in 0.0f..0.5f -> false | ||
| else -> null // Don't display while on the move. | ||
| } | ||
| } | ||
| } | ||
|
|
||
| MediumTopAppBar( | ||
| title = { | ||
| AnimatedVisibility( | ||
| visible = isCenterTitle != null, | ||
| enter = fadeIn(), | ||
| // No animation required as it is erased with alpha | ||
| exit = ExitTransition.None, | ||
| ) { | ||
| Text( | ||
| text = title, | ||
| modifier = Modifier.then( | ||
| when (isCenterTitle) { | ||
| true -> { | ||
| Modifier | ||
| .padding(end = navigationIconWidthDp.dp) | ||
| .fillMaxWidth() | ||
| } | ||
| false -> Modifier | ||
| null -> Modifier.alpha(0f) | ||
| }, | ||
| ), | ||
| textAlign = TextAlign.Center, | ||
| ) | ||
| } | ||
| }, | ||
| modifier = modifier, | ||
| navigationIcon = { | ||
| IconButton( | ||
| modifier = Modifier | ||
| .onGloballyPositioned { | ||
| navigationIconWidthDp = it.size.width / density | ||
| }, | ||
| onClick = onBackClick, | ||
| ) { | ||
| Icon( | ||
| imageVector = Filled.ArrowBack, | ||
| contentDescription = navIconContentDescription, | ||
| ) | ||
| } | ||
| }, | ||
| actions = actions, | ||
| windowInsets = windowInsets, | ||
| colors = colors, | ||
| scrollBehavior = scrollBehavior, | ||
| ) | ||
| } |
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