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...hub/reactivecircus/kstreamlined/android/feature/talkingkotlinepisode/component/SeekBar.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,180 @@ | ||
| package io.github.reactivecircus.kstreamlined.android.feature.talkingkotlinepisode.component | ||
|
|
||
| import androidx.compose.animation.animateColorAsState | ||
| import androidx.compose.animation.core.LinearOutSlowInEasing | ||
| import androidx.compose.animation.core.animateDpAsState | ||
| import androidx.compose.animation.core.tween | ||
| import androidx.compose.foundation.Canvas | ||
| import androidx.compose.foundation.gestures.detectDragGestures | ||
| import androidx.compose.foundation.gestures.detectTapGestures | ||
| import androidx.compose.foundation.layout.Box | ||
| import androidx.compose.foundation.layout.Row | ||
| import androidx.compose.foundation.layout.Spacer | ||
| import androidx.compose.foundation.layout.fillMaxWidth | ||
| import androidx.compose.foundation.layout.height | ||
| import androidx.compose.foundation.layout.offset | ||
| import androidx.compose.foundation.layout.padding | ||
| import androidx.compose.foundation.shape.CircleShape | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.LaunchedEffect | ||
| import androidx.compose.runtime.getValue | ||
| import androidx.compose.runtime.mutableFloatStateOf | ||
| import androidx.compose.runtime.mutableIntStateOf | ||
| import androidx.compose.runtime.mutableLongStateOf | ||
| 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.clip | ||
| import androidx.compose.ui.input.pointer.pointerInput | ||
| import androidx.compose.ui.layout.Layout | ||
| import androidx.compose.ui.platform.LocalDensity | ||
| import androidx.compose.ui.tooling.preview.PreviewLightDark | ||
| import androidx.compose.ui.unit.IntOffset | ||
| import androidx.compose.ui.unit.dp | ||
| import io.github.reactivecircus.kstreamlined.android.foundation.designsystem.component.Surface | ||
| import io.github.reactivecircus.kstreamlined.android.foundation.designsystem.component.Text | ||
| import io.github.reactivecircus.kstreamlined.android.foundation.designsystem.foundation.KSTheme | ||
| import kotlin.math.roundToInt | ||
|
|
||
| @Composable | ||
| internal fun SeekBar( | ||
| progressMillis: Long, | ||
| durationMillis: Long, | ||
| onProgressChangeFinished: (Long) -> Unit, | ||
| modifier: Modifier = Modifier, | ||
| ) { | ||
| var seeking by remember { mutableStateOf(false) } | ||
| val trackHeight by animateDpAsState( | ||
| targetValue = if (seeking) 12.dp else 4.dp, | ||
| animationSpec = tween( | ||
| durationMillis = AnimationDurationMillis, | ||
| easing = LinearOutSlowInEasing, | ||
| ), | ||
| label = "height", | ||
| ) | ||
|
|
||
| val timeLabelsOffset by animateDpAsState( | ||
| targetValue = if (seeking) 20.dp else 12.dp, | ||
| label = "offset", | ||
| animationSpec = tween( | ||
| durationMillis = AnimationDurationMillis, | ||
| easing = LinearOutSlowInEasing, | ||
| ), | ||
| ) | ||
| val timeLabelsOffsetPx = with(LocalDensity.current) { timeLabelsOffset.toPx() } | ||
|
|
||
| var fullTrackWidth by remember { mutableIntStateOf(0) } | ||
| var activeTrackWidthPx by remember { mutableFloatStateOf(0f) } | ||
| LaunchedEffect(fullTrackWidth) { | ||
| activeTrackWidthPx = (progressMillis.toFloat() / durationMillis.toFloat()) * fullTrackWidth | ||
| } | ||
|
|
||
| Box( | ||
| modifier = modifier | ||
| .height(24.dp) | ||
| .pointerInput(Unit) { | ||
| detectTapGestures( | ||
| onPress = { | ||
| seeking = true | ||
| }, | ||
| onTap = { | ||
| seeking = false | ||
| } | ||
| ) | ||
| } | ||
| .pointerInput(Unit) { | ||
| detectDragGestures( | ||
| onDragEnd = { | ||
| seeking = false | ||
| activeTrackWidthPx = activeTrackWidthPx.coerceIn(0f, size.width.toFloat()) | ||
| onProgressChangeFinished( | ||
| ((activeTrackWidthPx / size.width) * durationMillis).toLong() | ||
| ) | ||
| }, | ||
| onDragCancel = { | ||
| seeking = false | ||
| activeTrackWidthPx = activeTrackWidthPx.coerceIn(0f, size.width.toFloat()) | ||
| }, | ||
| ) { _, dragAmount -> | ||
| activeTrackWidthPx += dragAmount.x | ||
| } | ||
| }, | ||
| ) { | ||
| Layout( | ||
| { | ||
| val inactiveColor = KSTheme.colorScheme.onBackgroundVariant | ||
| val activeColor = KSTheme.colorScheme.onContainerInverse | ||
| val activeSeekingColor = KSTheme.colorScheme.onTertiary | ||
| val animatedActiveColor by animateColorAsState( | ||
| targetValue = if (seeking) activeSeekingColor else activeColor, | ||
| label = "color", | ||
| ) | ||
| Canvas( | ||
| modifier = Modifier | ||
| .fillMaxWidth() | ||
| .height(trackHeight) | ||
| ) { | ||
| drawRect( | ||
| color = inactiveColor, | ||
| size = size, | ||
| ) | ||
| drawRect( | ||
| color = animatedActiveColor, | ||
| size = size.copy(width = activeTrackWidthPx.coerceIn(0f, size.width)), | ||
| ) | ||
| } | ||
| }, | ||
| modifier = Modifier | ||
| .fillMaxWidth() | ||
| .clip(CircleShape) | ||
| ) { measurables, constraints -> | ||
| val trackPlaceable = measurables.first().measure(constraints) | ||
| fullTrackWidth = trackPlaceable.width | ||
| layout(trackPlaceable.width, trackPlaceable.height) { | ||
| trackPlaceable.placeRelative(0, 0) | ||
| } | ||
| } | ||
|
|
||
| Row( | ||
| modifier = Modifier.offset { | ||
| IntOffset(0, timeLabelsOffsetPx.roundToInt()) | ||
| } | ||
| ) { | ||
| Text( | ||
| text = "24:03", | ||
| style = KSTheme.typography.labelSmall, | ||
| color = KSTheme.colorScheme.onTertiaryVariant, | ||
| ) | ||
|
|
||
| Spacer(modifier = Modifier.weight(1f)) | ||
|
|
||
| Text( | ||
| text = "-32:36", | ||
| style = KSTheme.typography.labelSmall, | ||
| color = KSTheme.colorScheme.onTertiaryVariant, | ||
| ) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| private const val AnimationDurationMillis = 400 | ||
|
|
||
| @Composable | ||
| @PreviewLightDark | ||
| private fun PreviewSeekBar() { | ||
| KSTheme { | ||
| Surface( | ||
| color = KSTheme.colorScheme.tertiary | ||
| ) { | ||
| @Suppress("MagicNumber") | ||
| var progressMillis by remember { mutableLongStateOf(1200_000L) } | ||
| SeekBar( | ||
| modifier = Modifier.padding(8.dp), | ||
| progressMillis = progressMillis, | ||
| durationMillis = 3000_000L, | ||
| onProgressChangeFinished = { progressMillis = it }, | ||
| ) | ||
| } | ||
| } | ||
| } |