Merge "QS: Handle detail scroll properly" into nyc-dev

am: 4f620d423f

* commit '4f620d423f82dd43ed79178e0091132dd49ca2a9':
  QS: Handle detail scroll properly

Change-Id: I6c3023fc9a6053b5918a22fff9f9af577df48c43

packages/SystemUI/res/layout/qs_detail.xml

@@ -44,7 +44,7 @@
         android:layout_height="wrap_content"
         />
 
-    <ScrollView
+    <com.android.systemui.qs.NonInterceptingScrollView
         android:layout_width="match_parent"
         android:layout_height="0dp"
         android:layout_weight="1">
@@ -52,7 +52,7 @@
             android:id="@android:id/content"
             android:layout_width="match_parent"
             android:layout_height="wrap_content" />
-    </ScrollView>
+    </com.android.systemui.qs.NonInterceptingScrollView>
 
     <include layout="@layout/qs_detail_buttons" />
 

packages/SystemUI/src/com/android/systemui/qs/NonInterceptingScrollView.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the
+ * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+package com.android.systemui.qs;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.widget.ScrollView;
+
+/**
+ * ScrollView that disallows intercepting for touches that can cause scrolling.
+ */
+public class NonInterceptingScrollView extends ScrollView {
+
+    private float mInitialY;
+
+    public NonInterceptingScrollView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent ev) {
+        int action = ev.getActionMasked();
+        switch (action) {
+            case MotionEvent.ACTION_DOWN:
+                mInitialY = ev.getY();
+                break;
+            case MotionEvent.ACTION_UP:
+            case MotionEvent.ACTION_CANCEL:
+                requestDisallowInterceptTouchEvent(false);
+                break;
+            default:
+                if (canScrollVertically(ev.getY() > mInitialY ? -1 : 1)) {
+                    requestDisallowInterceptTouchEvent(true);
+                }
+                break;
+        }
+        return super.onTouchEvent(ev);
+    }
+}