From 3a9be3a6c6a688d81f6ccc513accbb9825aaa3be Mon Sep 17 00:00:00 2001
From: Mill Chen <millchen@google.com>
Date: Mon, 21 Jun 2021 16:47:03 +0800
Subject: [PATCH] Disable scrolling behavior for collapsing toolbar

We intended to make subsetting pages disable the scrolling behavior
within the collapsing toolbar area. The collapsing toolbar is still
able to be expanded/collapsed depending on the content of page.

Fix: 191614437
Fix: 189003332
Test: manual test
Cannot scroll/drag with the collapsing toolbar area

Change-Id: Ifa545a1720c64be742f85b34188516eb9c6683df
---
 .../CollapsingToolbarBaseActivity.java        | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/packages/SettingsLib/CollapsingToolbarBaseActivity/src/com/android/settingslib/collapsingtoolbar/CollapsingToolbarBaseActivity.java b/packages/SettingsLib/CollapsingToolbarBaseActivity/src/com/android/settingslib/collapsingtoolbar/CollapsingToolbarBaseActivity.java
index e6ca2e0d10c83..4ae120ae286d9 100644
--- a/packages/SettingsLib/CollapsingToolbarBaseActivity/src/com/android/settingslib/collapsingtoolbar/CollapsingToolbarBaseActivity.java
+++ b/packages/SettingsLib/CollapsingToolbarBaseActivity/src/com/android/settingslib/collapsingtoolbar/CollapsingToolbarBaseActivity.java
@@ -23,8 +23,11 @@ import android.view.View;
 import android.view.ViewGroup;
 import android.widget.Toolbar;
 
+import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.coordinatorlayout.widget.CoordinatorLayout;
 
+import com.google.android.material.appbar.AppBarLayout;
 import com.google.android.material.appbar.CollapsingToolbarLayout;
 import com.google.android.material.resources.TextAppearanceConfig;
 
@@ -35,6 +38,7 @@ import com.google.android.material.resources.TextAppearanceConfig;
 public class CollapsingToolbarBaseActivity extends SettingsTransitionActivity {
 
     private CollapsingToolbarLayout mCollapsingToolbarLayout;
+    private AppBarLayout mAppBarLayout;
 
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
@@ -43,6 +47,8 @@ public class CollapsingToolbarBaseActivity extends SettingsTransitionActivity {
         TextAppearanceConfig.setShouldLoadFontSynchronously(true);
         super.setContentView(R.layout.collapsing_toolbar_base_layout);
         mCollapsingToolbarLayout = findViewById(R.id.collapsing_toolbar);
+        mAppBarLayout = findViewById(R.id.app_bar);
+        disableCollapsingToolbarLayoutScrollingBehavior();
 
         final Toolbar toolbar = findViewById(R.id.action_bar);
         setActionBar(toolbar);
@@ -107,4 +113,18 @@ public class CollapsingToolbarBaseActivity extends SettingsTransitionActivity {
     public CollapsingToolbarLayout getCollapsingToolbarLayout() {
         return mCollapsingToolbarLayout;
     }
+
+    private void disableCollapsingToolbarLayoutScrollingBehavior() {
+        final CoordinatorLayout.LayoutParams params =
+                (CoordinatorLayout.LayoutParams) mAppBarLayout.getLayoutParams();
+        final AppBarLayout.Behavior behavior = new AppBarLayout.Behavior();
+        behavior.setDragCallback(
+                new AppBarLayout.Behavior.DragCallback() {
+                    @Override
+                    public boolean canDrag(@NonNull AppBarLayout appBarLayout) {
+                        return false;
+                    }
+                });
+        params.setBehavior(behavior);
+    }
 }