/*
* Copyright 2012 - 2014 Benjamin Weiss
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package de.keyboardsurfer.android.widget.crouton;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
/** Builds the default animations for showing and hiding a {@link de.keyboardsurfer.android.widget.crouton.Crouton}. */
final class DefaultAnimationsBuilder {
private static final long DURATION = 400;
private static Animation slideInDownAnimation, slideOutUpAnimation;
private static int lastInAnimationHeight, lastOutAnimationHeight;
private DefaultAnimationsBuilder() {
/* no-op */
}
/**
* @param croutonView
* The croutonView which gets animated.
*
* @return The default Animation for a showing {@link de.keyboardsurfer.android.widget.crouton.Crouton}.
*/
static Animation buildDefaultSlideInDownAnimation(View croutonView) {
if (!areLastMeasuredInAnimationHeightAndCurrentEqual(croutonView) || (null == slideInDownAnimation)) {
slideInDownAnimation = new TranslateAnimation(
0, 0, // X: from, to
-croutonView.getMeasuredHeight(), 0 // Y: from, to
);
slideInDownAnimation.setDuration(DURATION);
setLastInAnimationHeight(croutonView.getMeasuredHeight());
}
return slideInDownAnimation;
}
/**
* @param croutonView
* The croutonView which gets animated.
*
* @return The default Animation for a hiding {@link de.keyboardsurfer.android.widget.crouton.Crouton}.
*/
static Animation buildDefaultSlideOutUpAnimation(View croutonView) {
if (!areLastMeasuredOutAnimationHeightAndCurrentEqual(croutonView) || (null == slideOutUpAnimation)) {
slideOutUpAnimation = new TranslateAnimation(
0, 0, // X: from, to
0, -croutonView.getMeasuredHeight() // Y: from, to
);
slideOutUpAnimation.setDuration(DURATION);
setLastOutAnimationHeight(croutonView.getMeasuredHeight());
}
return slideOutUpAnimation;
}
private static boolean areLastMeasuredInAnimationHeightAndCurrentEqual(View croutonView) {
return areLastMeasuredAnimationHeightAndCurrentEqual(lastInAnimationHeight, croutonView);
}
private static boolean areLastMeasuredOutAnimationHeightAndCurrentEqual(View croutonView) {
return areLastMeasuredAnimationHeightAndCurrentEqual(lastOutAnimationHeight, croutonView);
}
private static boolean areLastMeasuredAnimationHeightAndCurrentEqual(int lastHeight, View croutonView) {
return lastHeight == croutonView.getMeasuredHeight();
}
private static void setLastInAnimationHeight(int lastInAnimationHeight) {
DefaultAnimationsBuilder.lastInAnimationHeight = lastInAnimationHeight;
}
private static void setLastOutAnimationHeight(int lastOutAnimationHeight) {
DefaultAnimationsBuilder.lastOutAnimationHeight = lastOutAnimationHeight;
}
}