1 /* 2 * Copyright (C) 2025 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.wallpaper.picker.customization.ui.util 18 19 import androidx.constraintlayout.motion.widget.MotionLayout 20 import androidx.constraintlayout.motion.widget.MotionLayout.TransitionListener 21 22 interface EmptyTransitionListener : TransitionListener { onTransitionStartednull23 override fun onTransitionStarted(motionLayout: MotionLayout?, startId: Int, endId: Int) { 24 // Do nothing intended 25 } 26 onTransitionChangenull27 override fun onTransitionChange( 28 motionLayout: MotionLayout?, 29 startId: Int, 30 endId: Int, 31 progress: Float, 32 ) { 33 // Do nothing intended 34 } 35 onTransitionCompletednull36 override fun onTransitionCompleted(motionLayout: MotionLayout?, currentId: Int) { 37 // Do nothing intended 38 } 39 onTransitionTriggernull40 override fun onTransitionTrigger( 41 motionLayout: MotionLayout?, 42 triggerId: Int, 43 positive: Boolean, 44 progress: Float, 45 ) { 46 // Do nothing intended 47 } 48 } 49