| /* |
| * Copyright (C) 2016 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 androidx.leanback.widget; |
| |
| import androidx.leanback.R; |
| import androidx.leanback.app.DetailsFragment; |
| import androidx.leanback.app.DetailsSupportFragment; |
| |
| /** |
| * Subclass of Parallax object that tracks overview row's top and bottom edge in DetailsFragment |
| * or DetailsSupportFragment. |
| * <p> |
| * It can be used for both creating cover image parallax effect and controlling video playing |
| * when transitioning to/from half/full screen. A direct use case is |
| * {@link androidx.leanback.app.DetailsFragmentBackgroundController}. |
| * </p> |
| * @see DetailsFragment#getParallax() |
| * @see androidx.leanback.app.DetailsFragmentBackgroundController |
| * @see DetailsSupportFragment#getParallax() |
| * @see androidx.leanback.app.DetailsSupportFragmentBackgroundController |
| */ |
| public class DetailsParallax extends RecyclerViewParallax { |
| final IntProperty mFrameTop; |
| final IntProperty mFrameBottom; |
| |
| public DetailsParallax() { |
| // track the top edge of details_frame of first item of adapter |
| mFrameTop = addProperty("overviewRowTop") |
| .adapterPosition(0) |
| .viewId(R.id.details_frame); |
| |
| // track the bottom edge of details_frame of first item of adapter |
| mFrameBottom = addProperty("overviewRowBottom") |
| .adapterPosition(0) |
| .viewId(R.id.details_frame) |
| .fraction(1.0f); |
| |
| } |
| |
| /** |
| * Returns the top of the details overview row. This is tracked for implementing the |
| * parallax effect. |
| */ |
| public Parallax.IntProperty getOverviewRowTop() { |
| return mFrameTop; |
| } |
| |
| /** |
| * Returns the bottom of the details overview row. This is tracked for implementing the |
| * parallax effect. |
| */ |
| public Parallax.IntProperty getOverviewRowBottom() { |
| return mFrameBottom; |
| } |
| } |