84 lines
3.2 KiB
Java
84 lines
3.2 KiB
Java
/*
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* Copyright 2012 - 2013 Benjamin Weiss
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* Copyright 2012 Neofonie Mobile GmbH
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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 de.keyboardsurfer.android.widget.crouton;
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import android.view.View;
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import android.view.animation.Animation;
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import android.view.animation.TranslateAnimation;
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/** Builds the default animations for showing and hiding a {@link Crouton}. */
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final class DefaultAnimationsBuilder {
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private static final long DURATION = 400;
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private static Animation slideInDownAnimation, slideOutUpAnimation;
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private static int lastInAnimationHeight, lastOutAnimationHeight;
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private DefaultAnimationsBuilder() {
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/* no-op */
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}
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private static boolean areLastMeasuredAnimationHeightAndCurrentEqual(final int lastHeight, final View croutonView) {
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return lastHeight == croutonView.getMeasuredHeight();
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}
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private static boolean areLastMeasuredInAnimationHeightAndCurrentEqual(final View croutonView) {
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return areLastMeasuredAnimationHeightAndCurrentEqual(lastInAnimationHeight, croutonView);
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}
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private static boolean areLastMeasuredOutAnimationHeightAndCurrentEqual(final View croutonView) {
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return areLastMeasuredAnimationHeightAndCurrentEqual(lastOutAnimationHeight, croutonView);
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}
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private static void setLastInAnimationHeight(final int lastInAnimationHeight) {
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DefaultAnimationsBuilder.lastInAnimationHeight = lastInAnimationHeight;
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}
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private static void setLastOutAnimationHeight(final int lastOutAnimationHeight) {
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DefaultAnimationsBuilder.lastOutAnimationHeight = lastOutAnimationHeight;
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}
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/**
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* @param croutonView The croutonView which gets animated.
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* @return The default Animation for a showing {@link Crouton}.
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*/
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static Animation buildDefaultSlideInDownAnimation(final View croutonView) {
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if (!areLastMeasuredInAnimationHeightAndCurrentEqual(croutonView) || null == slideInDownAnimation) {
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slideInDownAnimation = new TranslateAnimation(0, 0, // X: from, to
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-croutonView.getMeasuredHeight(), 0 // Y: from, to
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);
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slideInDownAnimation.setDuration(DURATION);
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setLastInAnimationHeight(croutonView.getMeasuredHeight());
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}
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return slideInDownAnimation;
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}
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/**
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* @param croutonView The croutonView which gets animated.
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* @return The default Animation for a hiding {@link Crouton}.
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*/
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static Animation buildDefaultSlideOutUpAnimation(final View croutonView) {
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if (!areLastMeasuredOutAnimationHeightAndCurrentEqual(croutonView) || null == slideOutUpAnimation) {
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slideOutUpAnimation = new TranslateAnimation(0, 0, // X: from, to
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0, -croutonView.getMeasuredHeight() // Y: from, to
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);
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slideOutUpAnimation.setDuration(DURATION);
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setLastOutAnimationHeight(croutonView.getMeasuredHeight());
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}
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return slideOutUpAnimation;
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}
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}
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