From be1b38c30b4383a332e8b0ff297d636789287d99 Mon Sep 17 00:00:00 2001
From: rightnao <rightnao@google.com>
Date: Tue, 17 May 2022 18:45:41 -0400
Subject: [PATCH] [BottomSheet] Exposing bottom sheet hide friction with
 get/set methods.

PiperOrigin-RevId: 449334214
---
 .../bottomsheet/BottomSheetBehavior.java      | 26 ++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/lib/java/com/google/android/material/bottomsheet/BottomSheetBehavior.java b/lib/java/com/google/android/material/bottomsheet/BottomSheetBehavior.java
index e152fd18f6a..f4097dd6c9b 100644
--- a/lib/java/com/google/android/material/bottomsheet/BottomSheetBehavior.java
+++ b/lib/java/com/google/android/material/bottomsheet/BottomSheetBehavior.java
@@ -292,6 +292,8 @@ void onLayout(@NonNull View bottomSheet) {}
 
   private boolean nestedScrolled;
 
+  private float hideFriction = HIDE_FRICTION;
+
   private int childHeight;
   int parentWidth;
   int parentHeight;
@@ -1144,6 +1146,28 @@ public int getSaveFlags() {
     return this.saveFlags;
   }
 
+  /**
+   * Sets the friction coefficient to hide the bottom sheet, or set it to the next closest
+   * expanded state.
+   *
+   * @param hideFriction The friction coefficient that determines the swipe velocity needed to
+   *  hide or set the bottom sheet to the closest expanded state.
+   */
+  public void setHideFriction(float hideFriction) {
+    this.hideFriction = hideFriction;
+  }
+
+  /**
+   * Gets the friction coefficient to hide the bottom sheet, or set it to the next closest
+   * expanded state.
+   *
+   * @return The friction coefficient that determines the swipe velocity needed to hide or set the
+   *  bottom sheet to the closest expanded state.
+   */
+  public float getHideFriction() {
+    return this.hideFriction;
+  }
+
   /**
    * Sets a callback to be notified of bottom sheet events.
    *
@@ -1393,7 +1417,7 @@ boolean shouldHide(@NonNull View child, float yvel) {
       return false;
     }
     int peek = calculatePeekHeight();
-    final float newTop = child.getTop() + yvel * HIDE_FRICTION;
+    final float newTop = child.getTop() + yvel * hideFriction;
     return Math.abs(newTop - collapsedOffset) / (float) peek > HIDE_THRESHOLD;
   }