From 39d12629dbc12e4a86037b09350ec1c49ed6e2e4 Mon Sep 17 00:00:00 2001
From: Andreas Greimel <andreas@greimel.de>
Date: Thu, 9 Jan 2020 19:35:01 +0100
Subject: [PATCH] fix(picker): pick correct option at low velocities (#19660)

fixes #19659
---
 core/src/components/picker-column/picker-column.tsx | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/core/src/components/picker-column/picker-column.tsx b/core/src/components/picker-column/picker-column.tsx
index e268acf60d..7233d46cd1 100644
--- a/core/src/components/picker-column/picker-column.tsx
+++ b/core/src/components/picker-column/picker-column.tsx
@@ -313,6 +313,18 @@ export class PickerColumnCmp implements ComponentInterface {
 
     } else {
       this.y += detail.deltaY;
+
+      if (Math.abs(detail.velocityY) < 0.05) {
+        const isScrollingUp = detail.deltaY > 0;
+        const optHeightFraction = (Math.abs(this.y) % this.optHeight) / this.optHeight;
+
+        if (isScrollingUp && optHeightFraction > 0.5) {
+          this.velocity = Math.abs(this.velocity) * -1;
+        } else if (!isScrollingUp && optHeightFraction <= 0.5) {
+          this.velocity = Math.abs(this.velocity);
+        }
+      }
+
       this.decelerate();
     }
   }