| /* |
| * Copyright (C) 2014 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.stack; |
| |
| import android.util.Log; |
| import android.view.View; |
| import android.view.ViewGroup; |
| |
| import com.android.systemui.R; |
| import com.android.systemui.statusbar.ExpandableNotificationRow; |
| import com.android.systemui.statusbar.ExpandableView; |
| |
| import java.util.List; |
| import java.util.WeakHashMap; |
| |
| /** |
| * A state of a {@link com.android.systemui.statusbar.stack.NotificationStackScrollLayout} which |
| * can be applied to a viewGroup. |
| */ |
| public class StackScrollState { |
| |
| private static final String CHILD_NOT_FOUND_TAG = "StackScrollStateNoSuchChild"; |
| |
| private final ViewGroup mHostView; |
| private WeakHashMap<ExpandableView, ExpandableViewState> mStateMap; |
| |
| public StackScrollState(ViewGroup hostView) { |
| mHostView = hostView; |
| mStateMap = new WeakHashMap<>(); |
| } |
| |
| public ViewGroup getHostView() { |
| return mHostView; |
| } |
| |
| public void resetViewStates() { |
| int numChildren = mHostView.getChildCount(); |
| for (int i = 0; i < numChildren; i++) { |
| ExpandableView child = (ExpandableView) mHostView.getChildAt(i); |
| resetViewState(child); |
| |
| // handling reset for child notifications |
| if (child instanceof ExpandableNotificationRow) { |
| ExpandableNotificationRow row = (ExpandableNotificationRow) child; |
| List<ExpandableNotificationRow> children = |
| row.getNotificationChildren(); |
| if (row.isSummaryWithChildren() && children != null) { |
| for (ExpandableNotificationRow childRow : children) { |
| resetViewState(childRow); |
| } |
| } |
| } |
| } |
| } |
| |
| private void resetViewState(ExpandableView view) { |
| ExpandableViewState viewState = mStateMap.get(view); |
| if (viewState == null) { |
| viewState = view.createNewViewState(this); |
| mStateMap.put(view, viewState); |
| } |
| // initialize with the default values of the view |
| viewState.height = view.getIntrinsicHeight(); |
| viewState.gone = view.getVisibility() == View.GONE; |
| viewState.alpha = 1f; |
| viewState.shadowAlpha = 1f; |
| viewState.notGoneIndex = -1; |
| viewState.xTranslation = view.getTranslationX(); |
| viewState.hidden = false; |
| viewState.scaleX = view.getScaleX(); |
| viewState.scaleY = view.getScaleY(); |
| viewState.inShelf = false; |
| } |
| |
| public ExpandableViewState getViewStateForView(View requestedView) { |
| return mStateMap.get(requestedView); |
| } |
| |
| public void removeViewStateForView(View child) { |
| mStateMap.remove(child); |
| } |
| |
| /** |
| * Apply the properties saved in {@link #mStateMap} to the children of the {@link #mHostView}. |
| * The properties are only applied if they effectively changed. |
| */ |
| public void apply() { |
| int numChildren = mHostView.getChildCount(); |
| for (int i = 0; i < numChildren; i++) { |
| ExpandableView child = (ExpandableView) mHostView.getChildAt(i); |
| ExpandableViewState state = mStateMap.get(child); |
| if (state == null) { |
| Log.wtf(CHILD_NOT_FOUND_TAG, "No child state was found when applying this state " + |
| "to the hostView"); |
| continue; |
| } |
| if (state.gone) { |
| continue; |
| } |
| state.applyToView(child); |
| } |
| } |
| } |