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fix(navigation): make push-enter feel as grounded as pop-exit #2041

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Merged
lostf1sh merged 1 commit into from
May 18, 2026
Merged

fix(navigation): make push-enter feel as grounded as pop-exit #2041

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15 changes: 11 additions & 4 deletions app/src/main/java/com/theveloper/pixelplay/presentation/navigation/Transitions.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -14,8 +14,9 @@ import androidx.compose.ui.graphics.TransformOrigin
// cubic-bezier(0.2, 0, 0, 1.0) — fast start, smooth settle
private val EmphasizedEasing = CubicBezierEasing(0.2f, 0f, 0f, 1f)

// Decelerate for elements entering the screen
private val EmphasizedDecelerateEasing = CubicBezierEasing(0.05f, 0.7f, 0.1f, 1f)
// Decelerate for elements entering the screen — mirror of EmphasizedAccelerateEasing
// so the entry feels as weighty/grounded as the pop-exit
private val EmphasizedDecelerateEasing = CubicBezierEasing(0.2f, 0.85f, 0.7f, 1f)

// Accelerate for elements leaving the screen
private val EmphasizedAccelerateEasing = CubicBezierEasing(0.3f, 0f, 0.8f, 0.15f)
Expand All @@ -24,12 +25,18 @@ private val EmphasizedAccelerateEasing = CubicBezierEasing(0.3f, 0f, 0.8f, 0.15f
// still smooth at 0.5x (system halves it to ~225 ms).
const val TRANSITION_DURATION = 450

// Push: Enter from Right — slides in 50% of screen width
// Push: Enter from Right — slides in 50% of screen width + slight scale up (mirrors popExit's weight)
// Fade uses an accelerate-style curve so alpha stays low while slide does its work,
// then catches up at the end — prevents the "fade arrives before slide" perceptual mismatch.
fun enterTransition() = slideInHorizontally(
animationSpec = tween(TRANSITION_DURATION, easing = EmphasizedDecelerateEasing),
initialOffsetX = { (it * 0.5f).toInt() }
) + scaleIn(
animationSpec = tween(TRANSITION_DURATION, easing = EmphasizedDecelerateEasing),
initialScale = 0.92f,
transformOrigin = TransformOrigin(0.5f, 0.5f)
) + fadeIn(
animationSpec = tween(TRANSITION_DURATION / 2, easing = EmphasizedDecelerateEasing)
animationSpec = tween(TRANSITION_DURATION, easing = EmphasizedAccelerateEasing)
)

// Push: Exit to Left — recedes 25% (parallax, barely moves)
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