Fix occasional jank when going to QS.

We change the listening state of the QS panel before the user
actually navigates there and when the animations are probably
not running (after expanding the panel).

Change-Id: Iad48b3459e7db09c423f6983a9fec17ec0088050

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

@@ -50,6 +50,7 @@ public class QSPanel extends ViewGroup {
     private int mPanelPaddingBottom;
     private int mDualTileUnderlap;
     private boolean mExpanded;
+    private boolean mListening;
 
     private TileRecord mDetailRecord;
     private Callback mCallback;
@@ -100,9 +101,14 @@ public class QSPanel extends ViewGroup {
         if (!mExpanded) {
             showDetail(false /*show*/, mDetailRecord);
         }
+    }
+
+    public void setListening(boolean listening) {
+        if (mListening == listening) return;
+        mListening = listening;
         for (TileRecord r : mRecords) {
-            r.tile.setListening(mExpanded);
-            if (mExpanded) {
+            r.tile.setListening(mListening);
+            if (mListening) {
                 r.tile.refreshState();
             }
         }

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

@@ -35,6 +35,7 @@ import android.widget.LinearLayout;
 import android.widget.TextView;
 
 import com.android.systemui.R;
+import com.android.systemui.qs.QSPanel;
 import com.android.systemui.statusbar.ExpandableView;
 import com.android.systemui.statusbar.FlingAnimationUtils;
 import com.android.systemui.statusbar.GestureRecorder;
@@ -61,7 +62,7 @@ public class NotificationPanelView extends PanelView implements
     private KeyguardPageSwipeHelper mPageSwiper;
     private StatusBarHeaderView mHeader;
     private View mQsContainer;
-    private View mQsPanel;
+    private QSPanel mQsPanel;
     private View mKeyguardStatusView;
     private ObservableScrollView mScrollView;
     private TextView mClockView;
@@ -136,7 +137,7 @@ public class NotificationPanelView extends PanelView implements
         mHeader.setOverlayParent(this);
         mKeyguardStatusView = findViewById(R.id.keyguard_status_view);
         mQsContainer = findViewById(R.id.quick_settings_container);
-        mQsPanel = findViewById(R.id.quick_settings_panel);
+        mQsPanel = (QSPanel) findViewById(R.id.quick_settings_panel);
         mClockView = (TextView) findViewById(R.id.clock_view);
         mScrollView = (ObservableScrollView) findViewById(R.id.scroll_view);
         mScrollView.setListener(this);
@@ -873,6 +874,20 @@ public class NotificationPanelView extends PanelView implements
         super.onExpandingFinished();
         mNotificationStackScroller.onExpansionStopped();
         mIsExpanding = false;
+        if (mExpandedHeight == 0f) {
+            mHeader.setListening(false);
+            mQsPanel.setListening(false);
+        } else {
+            mHeader.setListening(true);
+            mQsPanel.setListening(true);
+        }
+    }
+
+    @Override
+    public void instantExpand() {
+        super.instantExpand();
+        mHeader.setListening(true);
+        mQsPanel.setListening(true);
     }
 
     @Override

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

@@ -45,6 +45,7 @@ public class StatusBarHeaderView extends RelativeLayout implements View.OnClickL
     private static final float EXPANSION_RUBBERBAND_FACTOR = 0.35f;
 
     private boolean mExpanded;
+    private boolean mListening;
     private boolean mOverscrolled;
     private boolean mKeyguardShowing;
 
@@ -145,6 +146,14 @@ public class StatusBarHeaderView extends RelativeLayout implements View.OnClickL
         return mExpandedHeight;
     }
 
+    public void setListening(boolean listening) {
+        if (listening == mListening) {
+            return;
+        }
+        mListening = listening;
+        updateBrightnessControllerState();
+    }
+
     public void setExpanded(boolean expanded, boolean overscrolled) {
         boolean changed = expanded != mExpanded;
         boolean overscrollChanged = overscrolled != mOverscrolled;
@@ -154,7 +163,6 @@ public class StatusBarHeaderView extends RelativeLayout implements View.OnClickL
             updateHeights();
             updateVisibilities();
             updateSystemIconsLayoutParams();
-            updateBrightnessControllerState();
             updateZTranslation();
             updateClickTargets();
             updateWidth();
@@ -254,7 +262,7 @@ public class StatusBarHeaderView extends RelativeLayout implements View.OnClickL
     }
 
     private void updateBrightnessControllerState() {
-        if (mExpanded) {
+        if (mListening) {
             mBrightnessController.registerCallbacks();
         } else {
             mBrightnessController.unregisterCallbacks();