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feat: add spring-bounce and title-fade animations on task completion #124

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feat: add spring-bounce and title-fade animations on task completion #124

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26 changes: 24 additions & 2 deletions ...rc/main/java/com/vishal2376/snaptick/presentation/home_screen/components/TaskComponent.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,9 @@ package com.vishal2376.snaptick.presentation.home_screen.components

import androidx.compose.animation.core.Animatable
import androidx.compose.animation.core.FastOutSlowInEasing
import androidx.compose.animation.core.Spring
import androidx.compose.animation.core.animateFloatAsState
import androidx.compose.animation.core.spring
import androidx.compose.animation.core.tween
import androidx.compose.ui.platform.LocalDensity
import kotlinx.coroutines.coroutineScope
Expand Down Expand Up @@ -76,6 +79,22 @@ fun TaskComponent(
// Optimistic flip on tap; resets when upstream task id or isCompleted lands.
var localCompleted by remember(task.id, task.isCompleted) { mutableStateOf(task.isCompleted) }

// Spring-bounce on the check icon: 0 → 1 when first completed, 1 → 0 when unchecked.
val checkScale by animateFloatAsState(
targetValue = if (localCompleted) 1f else 0f,
animationSpec = spring(
dampingRatio = Spring.DampingRatioMediumBouncy,
stiffness = Spring.StiffnessMedium
),
label = "checkScale"
)
// Fade title slightly when done so it reads as "resolved".
val titleAlpha by animateFloatAsState(
targetValue = if (localCompleted) 0.45f else 1f,
animationSpec = tween(durationMillis = 300),
label = "titleAlpha"
)

// Onboarding-style entrance: 28dp slide-up + fade, FastOutSlowInEasing,
// matching WelcomePage.Staggered exactly. Caller signals scroll-in via a
// negative animDelay so we snap to final state instead of running the tween;
Expand Down Expand Up @@ -155,7 +174,9 @@ fun TaskComponent(
painter = painterResource(id = R.drawable.ic_check_circle),
contentDescription = null,
tint = if (isSystemInDarkTheme()) LightGreen else DarkGreen,
modifier = Modifier.size(20.dp)
modifier = Modifier
.size(20.dp)
.graphicsLayer { scaleX = checkScale; scaleY = checkScale }
)
} else {
Box(
Expand All @@ -182,7 +203,8 @@ fun TaskComponent(
Text(
modifier = Modifier
.fillMaxWidth()
.basicMarquee(delayMillis = 1000),
.basicMarquee(delayMillis = 1000)
.graphicsLayer { alpha = titleAlpha },
text = task.title,
style = taskTextStyle,
fontWeight = FontWeight.Bold,
Expand Down