67 lines
2.5 KiB
Java
67 lines
2.5 KiB
Java
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.messaging.ui;
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import android.view.Gravity;
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import android.view.View;
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import android.view.ViewPropertyAnimator;
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import com.google.common.base.Preconditions;
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/**
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* An interface that defines how a component can be animated with an {@link SnackBar}.
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*/
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public interface SnackBarInteraction {
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/**
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* Returns the animator that will be run in reaction to the given SnackBar being shown.
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*
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* Implementations may return null here if it determines that the given SnackBar does not need
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* to animate this component.
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*/
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ViewPropertyAnimator animateOnSnackBarShow(SnackBar snackBar);
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/**
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* Returns the animator that will be run in reaction to the given SnackBar being dismissed.
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*
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* Implementations may return null here if it determines that the given SnackBar does not need
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* to animate this component.
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*/
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ViewPropertyAnimator animateOnSnackBarDismiss(SnackBar snackBar);
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/**
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* A basic implementation of {@link SnackBarInteraction} that assumes that the
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* {@link SnackBar} is always shown with {@link Gravity#BOTTOM} and that the provided View will
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* always need to be translated up to make room for the SnackBar.
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*/
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public static class BasicSnackBarInteraction implements SnackBarInteraction {
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private final View mView;
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public BasicSnackBarInteraction(final View view) {
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mView = Preconditions.checkNotNull(view);
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}
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@Override
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public ViewPropertyAnimator animateOnSnackBarShow(final SnackBar snackBar) {
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final View rootView = snackBar.getRootView();
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return mView.animate().translationY(-rootView.getMeasuredHeight());
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}
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@Override
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public ViewPropertyAnimator animateOnSnackBarDismiss(final SnackBar snackBar) {
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return mView.animate().translationY(0);
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}
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}
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} |