mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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117 lines
4.4 KiB
Java
117 lines
4.4 KiB
Java
/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.gecko.home;
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import org.mozilla.gecko.R;
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import org.mozilla.gecko.animation.BounceAnimator;
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import org.mozilla.gecko.animation.BounceAnimator.Attributes;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.support.v4.view.PagerTabStrip;
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import android.util.AttributeSet;
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import android.view.View;
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import android.view.ViewTreeObserver;
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import com.nineoldandroids.animation.AnimatorSet;
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import com.nineoldandroids.animation.ObjectAnimator;
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import com.nineoldandroids.animation.ValueAnimator;
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import com.nineoldandroids.view.ViewHelper;
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/**
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* HomePagerTabStrip is a custom implementation of PagerTabStrip
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* that exposes XML attributes for the public methods.
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*/
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class HomePagerTabStrip extends PagerTabStrip {
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private static final String LOGTAG = "PagerTabStrip";
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private static final int ANIMATION_DELAY_MS = 250;
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private static final int ALPHA_MS = 10;
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private static final int BOUNCE1_MS = 350;
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private static final int BOUNCE2_MS = 200;
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private static final int BOUNCE3_MS = 100;
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private static final int BOUNCE4_MS = 100;
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private static final int INIT_OFFSET = 100;
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public HomePagerTabStrip(Context context) {
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super(context);
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}
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public HomePagerTabStrip(Context context, AttributeSet attrs) {
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super(context, attrs);
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TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.HomePagerTabStrip);
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int color = a.getColor(R.styleable.HomePagerTabStrip_tabIndicatorColor, 0x00);
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a.recycle();
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setTabIndicatorColor(color);
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getViewTreeObserver().addOnPreDrawListener(new PreDrawListener());
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}
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@Override
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public int getPaddingBottom() {
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// PagerTabStrip enforces a minimum bottom padding of 6dp which causes
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// misalignments when using 'center_vertical' gravity. Force padding bottom
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// to 0dp so that children are properly centered.
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return 0;
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}
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private void animateTitles() {
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final View prevTextView = getChildAt(0);
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final View nextTextView = getChildAt(getChildCount() - 1);
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if (prevTextView == null || nextTextView == null) {
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return;
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}
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// Set up initial values for the views that will be animated.
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ViewHelper.setTranslationX(prevTextView, -INIT_OFFSET);
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ViewHelper.setAlpha(prevTextView, 0);
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ViewHelper.setTranslationX(nextTextView, INIT_OFFSET);
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ViewHelper.setAlpha(nextTextView, 0);
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// Alpha animations.
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final ValueAnimator alpha1 = ObjectAnimator.ofFloat(prevTextView, "alpha", 1);
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final ValueAnimator alpha2 = ObjectAnimator.ofFloat(nextTextView, "alpha", 1);
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final AnimatorSet alphaAnimatorSet = new AnimatorSet();
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alphaAnimatorSet.playTogether(alpha1, alpha2);
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alphaAnimatorSet.setStartDelay(ANIMATION_DELAY_MS);
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alphaAnimatorSet.setDuration(ALPHA_MS);
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// Bounce animation.
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final float bounceDistance = getWidth()/100f; // Hack: TextFields still have 0 width here.
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final BounceAnimator prevBounceAnimator = new BounceAnimator(prevTextView, "translationX");
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prevBounceAnimator.queue(new Attributes(bounceDistance, BOUNCE1_MS));
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prevBounceAnimator.queue(new Attributes(-bounceDistance/4, BOUNCE2_MS));
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prevBounceAnimator.queue(new Attributes(0, BOUNCE4_MS));
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prevBounceAnimator.setStartDelay(ANIMATION_DELAY_MS);
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final BounceAnimator nextBounceAnimator = new BounceAnimator(nextTextView, "translationX");
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nextBounceAnimator.queue(new Attributes(-bounceDistance, BOUNCE1_MS));
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nextBounceAnimator.queue(new Attributes(bounceDistance/4, BOUNCE2_MS));
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nextBounceAnimator.queue(new Attributes(0, BOUNCE4_MS));
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nextBounceAnimator.setStartDelay(ANIMATION_DELAY_MS);
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// Start animations.
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alphaAnimatorSet.start();
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prevBounceAnimator.start();
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nextBounceAnimator.start();
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}
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private class PreDrawListener implements ViewTreeObserver.OnPreDrawListener {
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@Override
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public boolean onPreDraw() {
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animateTitles();
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getViewTreeObserver().removeOnPreDrawListener(this);
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return true;
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}
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}
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}
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