From 1fc9640e388d11ac0fdc10a2a936b1f55cae4c15 Mon Sep 17 00:00:00 2001
From: areumwoo <ar.woo@fastfive.co.kr>
Date: Mon, 2 Mar 2026 16:27:04 +0900
Subject: [PATCH] =?UTF-8?q?Gradient=20=EC=8A=AC=EB=9D=BC=EC=9D=B4=EB=8D=94?=
 =?UTF-8?q?=20=EA=B3=84=EC=82=B0=20=EB=A1=9C=EC=A7=81=20=EC=88=98=EC=A0=95?=
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---
 .../ui/screens/home/dcd/DcdSettingPopup.kt     |  2 +-
 .../ui/screens/home/dcd/GradientSlider.kt      | 18 +++++++++++++++---
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/app/src/main/java/com/laseroptek/raman/ui/screens/home/dcd/DcdSettingPopup.kt b/app/src/main/java/com/laseroptek/raman/ui/screens/home/dcd/DcdSettingPopup.kt
index 359e05f..5bd631c 100644
--- a/app/src/main/java/com/laseroptek/raman/ui/screens/home/dcd/DcdSettingPopup.kt
+++ b/app/src/main/java/com/laseroptek/raman/ui/screens/home/dcd/DcdSettingPopup.kt
@@ -334,7 +334,7 @@ fun DcdSettingPopup(
                         modifier = Modifier
                             .fillMaxHeight()
                             .size(40.px.dp, 210.px.dp),
-                        chargeRate = gasChargeRate.toInt()
+                        chargeRate = gasChargeRate
                     )
 
                     // Icon
diff --git a/app/src/main/java/com/laseroptek/raman/ui/screens/home/dcd/GradientSlider.kt b/app/src/main/java/com/laseroptek/raman/ui/screens/home/dcd/GradientSlider.kt
index 3250621..4babb62 100644
--- a/app/src/main/java/com/laseroptek/raman/ui/screens/home/dcd/GradientSlider.kt
+++ b/app/src/main/java/com/laseroptek/raman/ui/screens/home/dcd/GradientSlider.kt
@@ -28,14 +28,26 @@ import com.laseroptek.raman.ui.screens.main.MainViewModel
 import com.laseroptek.raman.utils.DefaultDispatcherProvider
 import com.laseroptek.raman.utils.ext.px
 import timber.log.Timber
+import kotlin.math.abs
+import kotlin.math.ceil
 
 
 @Composable
 fun GradientSlider(
     modifier: Modifier = Modifier,
-    chargeRate: Int = 0, // Value from (0 .. 100)
+    chargeRate: Float = 0f,
 ) {
-    val chargeIndex = ((chargeRate.coerceIn(0, 100) + 4) / 5).toInt()   // 0..19
+    val normalizedRate = chargeRate.coerceIn(0f, 100f)
+    val bucket = normalizedRate / 5f
+    val remainder = normalizedRate % 5f
+    val isExactMultiple = abs(remainder) < 0.0001f
+
+    val chargeIndex = when {
+        normalizedRate == 0f -> -1
+        isExactMultiple -> (bucket - 1f).toInt().coerceAtLeast(-1)
+        else -> (ceil(bucket.toDouble()).toInt() - 1)
+    }.coerceIn(-1, 19)
+
     Timber.d("chargeRate: $chargeRate, chargeIndex: $chargeIndex")
 
     Box(
@@ -103,6 +115,6 @@ fun GradientSliderPreview(
         //mainViewModel = mainViewModel
         modifier = Modifier
             .size(40.px.dp, 210.px.dp),
-        chargeRate =  20
+        chargeRate = 20f
     )
 }