1 /* 2 * Copyright (C) 2015 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 package com.android.messaging.ui; 17 18 import android.view.Gravity; 19 import android.view.View; 20 import android.view.ViewPropertyAnimator; 21 22 import com.google.common.base.Preconditions; 23 24 /** 25 * An interface that defines how a component can be animated with an {@link SnackBar}. 26 */ 27 public interface SnackBarInteraction { 28 /** 29 * Returns the animator that will be run in reaction to the given SnackBar being shown. 30 * 31 * Implementations may return null here if it determines that the given SnackBar does not need 32 * to animate this component. 33 */ animateOnSnackBarShow(SnackBar snackBar)34 ViewPropertyAnimator animateOnSnackBarShow(SnackBar snackBar); 35 36 /** 37 * Returns the animator that will be run in reaction to the given SnackBar being dismissed. 38 * 39 * Implementations may return null here if it determines that the given SnackBar does not need 40 * to animate this component. 41 */ animateOnSnackBarDismiss(SnackBar snackBar)42 ViewPropertyAnimator animateOnSnackBarDismiss(SnackBar snackBar); 43 44 /** 45 * A basic implementation of {@link SnackBarInteraction} that assumes that the 46 * {@link SnackBar} is always shown with {@link Gravity#BOTTOM} and that the provided View will 47 * always need to be translated up to make room for the SnackBar. 48 */ 49 public static class BasicSnackBarInteraction implements SnackBarInteraction { 50 private final View mView; 51 BasicSnackBarInteraction(final View view)52 public BasicSnackBarInteraction(final View view) { 53 mView = Preconditions.checkNotNull(view); 54 } 55 56 @Override animateOnSnackBarShow(final SnackBar snackBar)57 public ViewPropertyAnimator animateOnSnackBarShow(final SnackBar snackBar) { 58 final View rootView = snackBar.getRootView(); 59 return mView.animate().translationY(-rootView.getMeasuredHeight()); 60 } 61 62 @Override animateOnSnackBarDismiss(final SnackBar snackBar)63 public ViewPropertyAnimator animateOnSnackBarDismiss(final SnackBar snackBar) { 64 return mView.animate().translationY(0); 65 } 66 } 67 }