michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.widget;
michael@0: 
michael@0: import org.mozilla.gecko.animation.HeightChangeAnimation;
michael@0: 
michael@0: import android.content.Context;
michael@0: import android.util.AttributeSet;
michael@0: import android.view.animation.Animation;
michael@0: import android.view.animation.DecelerateInterpolator;
michael@0: import android.widget.RelativeLayout;
michael@0: 
michael@0: public class AnimatedHeightLayout extends RelativeLayout {
michael@0:     private static final String LOGTAG = "GeckoAnimatedHeightLayout";
michael@0:     private static final int ANIMATION_DURATION = 100;
michael@0:     private boolean mAnimating = false;
michael@0: 
michael@0:     public AnimatedHeightLayout(Context context) {
michael@0:         super(context, null);
michael@0:     }
michael@0: 
michael@0:     public AnimatedHeightLayout(Context context, AttributeSet attrs) {
michael@0:         super(context, attrs, 0);
michael@0:     }
michael@0: 
michael@0:     public AnimatedHeightLayout(Context context, AttributeSet attrs, int defStyle) {
michael@0:         super(context, attrs, defStyle);
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
michael@0:         int oldHeight = getMeasuredHeight();
michael@0:         super.onMeasure(widthMeasureSpec, heightMeasureSpec);
michael@0:         int newHeight = getMeasuredHeight();
michael@0: 
michael@0:         if (!mAnimating && oldHeight != 0 && oldHeight != newHeight) {
michael@0:             mAnimating = true;
michael@0:             setMeasuredDimension(getMeasuredWidth(), oldHeight);
michael@0: 
michael@0:             // Animate the difference of suggestion row height
michael@0:             Animation anim = new HeightChangeAnimation(this, oldHeight, newHeight);
michael@0:             anim.setDuration(ANIMATION_DURATION);
michael@0:             anim.setInterpolator(new DecelerateInterpolator());
michael@0:             anim.setAnimationListener(new Animation.AnimationListener() {
michael@0:                 @Override
michael@0:                 public void onAnimationStart(Animation animation) {}
michael@0:                 @Override
michael@0:                 public void onAnimationRepeat(Animation animation) {}
michael@0:                 @Override
michael@0:                 public void onAnimationEnd(Animation animation) {
michael@0:                     post(new Runnable() {
michael@0:                         @Override
michael@0:                         public void run() {
michael@0:                             finishAnimation();
michael@0:                         }
michael@0:                     });
michael@0:                 }
michael@0:             });
michael@0:             startAnimation(anim);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     protected void onDetachedFromWindow() {
michael@0:         super.onDetachedFromWindow();
michael@0:         finishAnimation();
michael@0:     }
michael@0: 
michael@0:     private void finishAnimation() {
michael@0:         if (mAnimating) {
michael@0:             getLayoutParams().height = LayoutParams.WRAP_CONTENT;
michael@0:             mAnimating = false;
michael@0:         }
michael@0:     }
michael@0: }