1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License 15 */ 16 17 package com.android.systemui.statusbar.phone; 18 19 /** 20 * Panel and QS expansion callbacks. 21 */ 22 public interface PanelExpansionListener { 23 /** 24 * Invoked whenever the notification panel expansion changes, at every animation frame. 25 * This is the main expansion that happens when the user is swiping up to dismiss the 26 * lock screen. 27 * 28 * @param expansion 0 when collapsed, 1 when expanded. 29 * @param tracking {@code true} when the user is actively dragging the panel. 30 */ onPanelExpansionChanged(float expansion, boolean tracking)31 void onPanelExpansionChanged(float expansion, boolean tracking); 32 33 /** 34 * Invoked whenever the QS expansion changes, at every animation frame. 35 * @param expansion 0 when collapsed, 1 when expanded. 36 */ onQsExpansionChanged(float expansion)37 default void onQsExpansionChanged(float expansion) {}; 38 } 39