/* * 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.wallpaper.picker; import androidx.annotation.Nullable; /** * Interface for a class which presents (in UI) a collection of wallpapers. */ public interface WallpapersUiContainer { /** * Notifies the container that wallpapers are ready to display. */ void onWallpapersReady(); /** * Returns the {@link CategorySelectorFragment} used by this container to display wallpaper * categories, or {@code null} if none is available. */ @Nullable CategorySelectorFragment getCategorySelectorFragment(); /** * Notifies the container that categories have been fetched. */ void doneFetchingCategories(); }