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      1 /*
      2  * Copyright 2018 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package androidx.browser.browseractions;
     18 
     19 import android.animation.Animator;
     20 import android.animation.AnimatorListenerAdapter;
     21 import android.app.Dialog;
     22 import android.content.Context;
     23 import android.graphics.Color;
     24 import android.graphics.drawable.ColorDrawable;
     25 import android.view.MotionEvent;
     26 import android.view.View;
     27 import android.view.Window;
     28 
     29 import androidx.interpolator.view.animation.LinearOutSlowInInterpolator;
     30 
     31 /**
     32  * The dialog class showing the context menu and ensures proper animation is played upon calling
     33  * {@link #show()} and {@link #dismiss()}.
     34  */
     35 class BrowserActionsFallbackMenuDialog extends Dialog {
     36     private static final long ENTER_ANIMATION_DURATION_MS = 250;
     37     // Exit animation duration should be set to 60% of the enter animation duration.
     38     private static final long EXIT_ANIMATION_DURATION_MS = 150;
     39     private final View mContentView;
     40 
     41     BrowserActionsFallbackMenuDialog(Context context, View contentView) {
     42         super(context);
     43         mContentView = contentView;
     44     }
     45 
     46     @Override
     47     public void show() {
     48         Window dialogWindow = getWindow();
     49         dialogWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
     50         startAnimation(true);
     51         super.show();
     52     }
     53 
     54     @Override
     55     public boolean onTouchEvent(MotionEvent event) {
     56         if (event.getAction() == MotionEvent.ACTION_DOWN) {
     57             dismiss();
     58             return true;
     59         }
     60         return false;
     61     }
     62 
     63     @Override
     64     public void dismiss() {
     65         startAnimation(false);
     66     }
     67 
     68     private void startAnimation(final boolean isEnterAnimation) {
     69         float from = isEnterAnimation ? 0f : 1f;
     70         float to = isEnterAnimation ? 1f : 0f;
     71         long duration = isEnterAnimation ? ENTER_ANIMATION_DURATION_MS : EXIT_ANIMATION_DURATION_MS;
     72         mContentView.setScaleX(from);
     73         mContentView.setScaleY(from);
     74 
     75         mContentView.animate()
     76                 .scaleX(to)
     77                 .scaleY(to)
     78                 .setDuration(duration)
     79                 .setInterpolator(new LinearOutSlowInInterpolator())
     80                 .setListener(new AnimatorListenerAdapter() {
     81                     @Override
     82                     public void onAnimationEnd(Animator animation) {
     83                         if (!isEnterAnimation) {
     84                             BrowserActionsFallbackMenuDialog.super.dismiss();
     85                         }
     86                     }
     87                 })
     88                 .start();
     89     }
     90 }
     91