| /* |
| * Copyright (C) 2017 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.statusbar.notification; |
| |
| import android.view.View; |
| import android.view.ViewGroup; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.systemui.statusbar.ExpandableNotificationRow; |
| |
| /** |
| * An observer that listens to the above shelf state and can notify listeners |
| */ |
| public class AboveShelfObserver implements AboveShelfChangedListener { |
| |
| private final ViewGroup mHostLayout; |
| private boolean mHasViewsAboveShelf = false; |
| private HasViewAboveShelfChangedListener mListener; |
| |
| public AboveShelfObserver(ViewGroup hostLayout) { |
| mHostLayout = hostLayout; |
| } |
| |
| public void setListener(HasViewAboveShelfChangedListener listener) { |
| mListener = listener; |
| } |
| |
| @Override |
| public void onAboveShelfStateChanged(boolean aboveShelf) { |
| boolean hasViewsAboveShelf = aboveShelf; |
| if (!hasViewsAboveShelf && mHostLayout != null) { |
| int n = mHostLayout.getChildCount(); |
| for (int i = 0; i < n; i++) { |
| View child = mHostLayout.getChildAt(i); |
| if (child instanceof ExpandableNotificationRow) { |
| if (((ExpandableNotificationRow) child).isAboveShelf()) { |
| hasViewsAboveShelf = true; |
| break; |
| } |
| } |
| } |
| } |
| if (mHasViewsAboveShelf != hasViewsAboveShelf) { |
| mHasViewsAboveShelf = hasViewsAboveShelf; |
| if (mListener != null) { |
| mListener.onHasViewsAboveShelfChanged(hasViewsAboveShelf); |
| } |
| } |
| } |
| |
| @VisibleForTesting |
| boolean hasViewsAboveShelf() { |
| return mHasViewsAboveShelf; |
| } |
| |
| public interface HasViewAboveShelfChangedListener { |
| void onHasViewsAboveShelfChanged(boolean hasViewsAboveShelf); |
| } |
| } |