The Tor Browser: mobile/android/base/widget/AnimatedHeightLayout.java@fc2d59ddac77

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this file,

     3  * You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 package org.mozilla.gecko.widget;

     7 import org.mozilla.gecko.animation.HeightChangeAnimation;

     9 import android.content.Context;

    10 import android.util.AttributeSet;

    11 import android.view.animation.Animation;

    12 import android.view.animation.DecelerateInterpolator;

    13 import android.widget.RelativeLayout;

    15 public class AnimatedHeightLayout extends RelativeLayout {

    16     private static final String LOGTAG = "GeckoAnimatedHeightLayout";

    17     private static final int ANIMATION_DURATION = 100;

    18     private boolean mAnimating = false;

    20     public AnimatedHeightLayout(Context context) {

    21         super(context, null);

    22     }

    24     public AnimatedHeightLayout(Context context, AttributeSet attrs) {

    25         super(context, attrs, 0);

    26     }

    28     public AnimatedHeightLayout(Context context, AttributeSet attrs, int defStyle) {

    29         super(context, attrs, defStyle);

    30     }

    32     @Override

    33     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

    34         int oldHeight = getMeasuredHeight();

    35         super.onMeasure(widthMeasureSpec, heightMeasureSpec);

    36         int newHeight = getMeasuredHeight();

    38         if (!mAnimating && oldHeight != 0 && oldHeight != newHeight) {

    39             mAnimating = true;

    40             setMeasuredDimension(getMeasuredWidth(), oldHeight);

    42             // Animate the difference of suggestion row height

    43             Animation anim = new HeightChangeAnimation(this, oldHeight, newHeight);

    44             anim.setDuration(ANIMATION_DURATION);

    45             anim.setInterpolator(new DecelerateInterpolator());

    46             anim.setAnimationListener(new Animation.AnimationListener() {

    47                 @Override

    48                 public void onAnimationStart(Animation animation) {}

    49                 @Override

    50                 public void onAnimationRepeat(Animation animation) {}

    51                 @Override

    52                 public void onAnimationEnd(Animation animation) {

    53                     post(new Runnable() {

    54                         @Override

    55                         public void run() {

    56                             finishAnimation();

    57                         }

    58                     });

    59                 }

    60             });

    61             startAnimation(anim);

    62         }

    63     }

    65     @Override

    66     protected void onDetachedFromWindow() {

    67         super.onDetachedFromWindow();

    68         finishAnimation();

    69     }

    71     private void finishAnimation() {

    72         if (mAnimating) {

    73             getLayoutParams().height = LayoutParams.WRAP_CONTENT;

    74             mAnimating = false;

    75         }

    76     }

    77 }

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