Merge "Improved expansion logic of NotificationStackScroller"

packages/SystemUI/src/com/android/systemui/ExpandHelper.java

@@ -108,7 +108,7 @@ public class ExpandHelper implements Gefingerpoken, OnClickListener {
 
     private int mGravity;
 
-    private View mScrollView;
+    private ScrollAdapter mScrollAdapter;
 
     private OnScaleGestureListener mScaleGestureListener
             = new ScaleGestureDetector.SimpleOnScaleGestureListener() {
@@ -301,8 +301,8 @@ public class ExpandHelper implements Gefingerpoken, OnClickListener {
         mGravity = gravity;
     }
 
-    public void setScrollView(View scrollView) {
-        mScrollView = scrollView;
+    public void setScrollAdapter(ScrollAdapter adapter) {
+        mScrollAdapter = adapter;
     }
 
     private float calculateGlow(float target, float actual) {
@@ -384,7 +384,7 @@ public class ExpandHelper implements Gefingerpoken, OnClickListener {
                 }
                 return true;
             }
-            if (mScrollView != null && mScrollView.getScrollY() > 0) {
+            if (mScrollAdapter != null && !mScrollAdapter.isScrolledToTop()) {
                 return false;
             }
             // Now look for other gestures
@@ -407,7 +407,7 @@ public class ExpandHelper implements Gefingerpoken, OnClickListener {
             }
 
             case MotionEvent.ACTION_DOWN:
-                mWatchingForPull = isInside(mScrollView, x, y);
+                mWatchingForPull = isInside(mScrollAdapter.getHostView(), x, y);
                 mLastMotionY = y;
                 break;
 
@@ -608,5 +608,19 @@ public class ExpandHelper implements Gefingerpoken, OnClickListener {
         }
         mVibrator.vibrate(duration, AudioManager.STREAM_SYSTEM);
     }
+
+    public interface ScrollAdapter {
+
+        /**
+         * @return Whether the view returned by {@link #getHostView()} is scrolled to the top
+         * and can therefore be expanded by a single finger drag
+         */
+        public boolean isScrolledToTop();
+
+        /**
+         * @return The view in which the scrolling is performed
+         */
+        public View getHostView();
+    }
 }
 

packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java

@@ -1483,7 +1483,7 @@ public class PhoneStatusBar extends BaseStatusBar implements DemoMode {
         }
 
         mExpandedVisible = true;
-        if(!ENABLE_NOTIFICATION_STACK) {
+        if (!ENABLE_NOTIFICATION_STACK) {
             ((NotificationRowLayout) mPile).setLayoutTransitionsEnabled(true);
         }
         if (mNavigationBarView != null)
@@ -1777,7 +1777,7 @@ public class PhoneStatusBar extends BaseStatusBar implements DemoMode {
         }
 
         mExpandedVisible = false;
-        if(!ENABLE_NOTIFICATION_STACK) {
+        if (!ENABLE_NOTIFICATION_STACK) {
             ((NotificationRowLayout) mPile).setLayoutTransitionsEnabled(false);
         }
         if (mNavigationBarView != null)
@@ -2477,7 +2477,7 @@ public class PhoneStatusBar extends BaseStatusBar implements DemoMode {
                         int totalDelay = 0;
 
 
-                        if(!ENABLE_NOTIFICATION_STACK) {
+                        if (!ENABLE_NOTIFICATION_STACK) {
                             // Set the shade-animating state to avoid doing other work during
                             // all of these animations. In particular, avoid layout and
                             // redrawing when collapsing the shade.

packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarWindowView.java

@@ -27,11 +27,11 @@ import android.view.View;
 import android.view.ViewGroup;
 import android.view.ViewRootImpl;
 import android.widget.FrameLayout;
-import android.widget.ScrollView;
 
 import com.android.systemui.ExpandHelper;
 import com.android.systemui.R;
 import com.android.systemui.statusbar.BaseStatusBar;
+import com.android.systemui.statusbar.stack.NotificationStackScrollLayout;
 
 
 public class StatusBarWindowView extends FrameLayout
@@ -42,7 +42,7 @@ public class StatusBarWindowView extends FrameLayout
     private ExpandHelper mExpandHelper;
     private ViewGroup latestItems;
     private NotificationPanelView mNotificationPanel;
-    private ScrollView mScrollView;
+    private View mNotificationScroller;
 
     PhoneStatusBar mService;
 
@@ -56,19 +56,37 @@ public class StatusBarWindowView extends FrameLayout
     protected void onAttachedToWindow () {
         super.onAttachedToWindow();
 
+        ExpandHelper.ScrollAdapter scrollAdapter;
         if (BaseStatusBar.ENABLE_NOTIFICATION_STACK) {
-            latestItems = (ViewGroup) findViewById(R.id.notification_stack_scroller);
+            NotificationStackScrollLayout stackScrollLayout =
+                    (NotificationStackScrollLayout) findViewById(R.id.notification_stack_scroller);
+
+            // ScrollView and notification container are unified in a single view now.
+            latestItems = stackScrollLayout;
+            scrollAdapter = stackScrollLayout;
+            mNotificationScroller = stackScrollLayout;
         } else {
             latestItems = (ViewGroup) findViewById(R.id.latestItems);
+            mNotificationScroller = findViewById(R.id.scroll);
+            scrollAdapter = new ExpandHelper.ScrollAdapter() {
+                @Override
+                public boolean isScrolledToTop() {
+                    return mNotificationScroller.getScrollY() == 0;
+                }
+
+                @Override
+                public View getHostView() {
+                    return mNotificationScroller;
+                }
+            };
         }
-        mScrollView = (ScrollView) findViewById(R.id.scroll);
         mNotificationPanel = (NotificationPanelView) findViewById(R.id.notification_panel);
         int minHeight = getResources().getDimensionPixelSize(R.dimen.notification_row_min_height);
         int maxHeight = getResources().getDimensionPixelSize(R.dimen.notification_row_max_height);
         mExpandHelper = new ExpandHelper(getContext(), (ExpandHelper.Callback) latestItems,
                 minHeight, maxHeight);
         mExpandHelper.setEventSource(this);
-        mExpandHelper.setScrollView(mScrollView);
+        mExpandHelper.setScrollAdapter(scrollAdapter);
 
         // We really need to be able to animate while window animations are going on
         // so that activities may be started asynchronously from panel animations
@@ -94,7 +112,8 @@ public class StatusBarWindowView extends FrameLayout
     @Override
     public boolean onInterceptTouchEvent(MotionEvent ev) {
         boolean intercept = false;
-        if (mNotificationPanel.isFullyExpanded() && mScrollView.getVisibility() == View.VISIBLE) {
+        if (mNotificationPanel.isFullyExpanded()
+                && mNotificationScroller.getVisibility() == View.VISIBLE) {
             intercept = mExpandHelper.onInterceptTouchEvent(ev);
         }
         if (!intercept) {

packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java

@@ -42,7 +42,7 @@ import com.android.systemui.statusbar.ExpandableNotificationRow;
  * A layout which handles a dynamic amount of notifications and presents them in a scrollable stack.
  */
 public class NotificationStackScrollLayout extends ViewGroup
-        implements SwipeHelper.Callback, ExpandHelper.Callback {
+        implements SwipeHelper.Callback, ExpandHelper.Callback, ExpandHelper.ScrollAdapter {
 
     private static final String TAG = "NotificationStackScrollLayout";
     private static final boolean DEBUG = false;
@@ -813,4 +813,14 @@ public class NotificationStackScrollLayout extends ViewGroup
             mSwipeHelper.removeLongPressCallback();
         }
     }
+
+    @Override
+    public boolean isScrolledToTop() {
+        return mOwnScrollY == 0;
+    }
+
+    @Override
+    public View getHostView() {
+        return this;
+    }
 }