Fix intercept logic in NotificationPanelView.

We need to make sure that we only block the disallow intercept
request when interacting with the ScrollView. In the past, we also
blocked the disallow intercept request for the brightness slider, for
example.

Bug: 15169261
Change-Id: I02dd1e399a527509d631fdde54249d57748b20f2

2 files changed, 19 insertions, 3 deletions

diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java
index fe7546d..50ea4bc 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelView.java
@@ -353,10 +353,12 @@ public class NotificationPanelView extends PanelView implements
     @Override
     public void requestDisallowInterceptTouchEvent(boolean disallowIntercept) {
 
-        // Block request so we can still intercept the scrolling when QS is expanded.
-        if (!mQsExpanded) {
-            super.requestDisallowInterceptTouchEvent(disallowIntercept);
+        // Block request when interacting with the scroll view so we can still intercept the
+        // scrolling when QS is expanded.
+        if (mScrollView.isDispatchingTouchEvent()) {
+            return;
         }
+        super.requestDisallowInterceptTouchEvent(disallowIntercept);
     }
 
     private void flingWithCurrentVelocity() {
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/ObservableScrollView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/ObservableScrollView.java
index ba0b66e..c4e61d0 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/ObservableScrollView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/ObservableScrollView.java
@@ -18,6 +18,7 @@ package com.android.systemui.statusbar.phone;
 
 import android.content.Context;
 import android.util.AttributeSet;
+import android.view.MotionEvent;
 import android.view.View;
 import android.widget.ScrollView;
 
@@ -28,6 +29,7 @@ public class ObservableScrollView extends ScrollView {
 
     private Listener mListener;
     private int mLastOverscrollAmount;
+    private boolean mDispatchingTouchEvent;
 
     public ObservableScrollView(Context context, AttributeSet attrs) {
         super(context, attrs);
@@ -41,6 +43,10 @@ public class ObservableScrollView extends ScrollView {
         return getScrollY() == getMaxScrollY();
     }
 
+    public boolean isDispatchingTouchEvent() {
+        return mDispatchingTouchEvent;
+    }
+
     private int getMaxScrollY() {
         int scrollRange = 0;
         if (getChildCount() > 0) {
@@ -52,6 +58,14 @@ public class ObservableScrollView extends ScrollView {
     }
 
     @Override
+    public boolean dispatchTouchEvent(MotionEvent ev) {
+        mDispatchingTouchEvent = true;
+        boolean result = super.dispatchTouchEvent(ev);
+        mDispatchingTouchEvent = false;
+        return result;
+    }
+
+    @Override
     protected void onScrollChanged(int l, int t, int oldl, int oldt) {
         super.onScrollChanged(l, t, oldl, oldt);
         if (mListener != null) {