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      1 /*
      2  * Copyright (C) 2013 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 com.android.systemui.statusbar.phone;
     18 
     19 import android.animation.Animator;
     20 import android.animation.AnimatorListenerAdapter;
     21 import android.content.Context;
     22 import android.os.ServiceManager;
     23 import android.view.MotionEvent;
     24 import android.view.View;
     25 import android.view.animation.AccelerateInterpolator;
     26 
     27 import com.android.internal.statusbar.IStatusBarService;
     28 import com.android.systemui.R;
     29 import com.android.systemui.statusbar.policy.KeyButtonView;
     30 
     31 public final class NavigationBarTransitions extends BarTransitions {
     32 
     33     private static final int CONTENT_FADE_DURATION = 200;
     34 
     35     private final NavigationBarView mView;
     36     private final IStatusBarService mBarService;
     37 
     38     private boolean mLightsOut;
     39     private boolean mVertical;
     40     private int mRequestedMode;
     41 
     42     public NavigationBarTransitions(NavigationBarView view) {
     43         super(view, R.drawable.nav_background);
     44         mView = view;
     45         mBarService = IStatusBarService.Stub.asInterface(
     46                 ServiceManager.getService(Context.STATUS_BAR_SERVICE));
     47     }
     48 
     49     public void init(boolean isVertical) {
     50         setVertical(isVertical);
     51         applyModeBackground(-1, getMode(), false /*animate*/);
     52         applyMode(getMode(), false /*animate*/, true /*force*/);
     53     }
     54 
     55     public void setVertical(boolean isVertical) {
     56         mVertical = isVertical;
     57         transitionTo(mRequestedMode, false /*animate*/);
     58     }
     59 
     60     @Override
     61     public void transitionTo(int mode, boolean animate) {
     62         mRequestedMode = mode;
     63         if (mVertical) {
     64             // translucent mode not allowed when vertical
     65             if (mode == MODE_TRANSLUCENT || mode == MODE_TRANSPARENT) {
     66                 mode = MODE_OPAQUE;
     67             } else if (mode == MODE_LIGHTS_OUT_TRANSPARENT) {
     68                 mode = MODE_LIGHTS_OUT;
     69             }
     70         }
     71         super.transitionTo(mode, animate);
     72     }
     73 
     74     @Override
     75     protected void onTransition(int oldMode, int newMode, boolean animate) {
     76         super.onTransition(oldMode, newMode, animate);
     77         applyMode(newMode, animate, false /*force*/);
     78     }
     79 
     80     private void applyMode(int mode, boolean animate, boolean force) {
     81         // apply to key buttons
     82         final float alpha = alphaForMode(mode);
     83         setKeyButtonViewQuiescentAlpha(mView.getHomeButton(), alpha, animate);
     84         setKeyButtonViewQuiescentAlpha(mView.getRecentsButton(), alpha, animate);
     85         setKeyButtonViewQuiescentAlpha(mView.getMenuButton(), alpha, animate);
     86         setKeyButtonViewQuiescentAlpha(mView.getImeSwitchButton(), alpha, animate);
     87 
     88         applyBackButtonQuiescentAlpha(mode, animate);
     89 
     90         // apply to lights out
     91         applyLightsOut(isLightsOut(mode), animate, force);
     92     }
     93 
     94     private float alphaForMode(int mode) {
     95         final boolean isOpaque = mode == MODE_OPAQUE || mode == MODE_LIGHTS_OUT;
     96         return isOpaque ? KeyButtonView.DEFAULT_QUIESCENT_ALPHA : 1f;
     97     }
     98 
     99     public void applyBackButtonQuiescentAlpha(int mode, boolean animate) {
    100         float backAlpha = 0;
    101         backAlpha = maxVisibleQuiescentAlpha(backAlpha, mView.getHomeButton());
    102         backAlpha = maxVisibleQuiescentAlpha(backAlpha, mView.getRecentsButton());
    103         backAlpha = maxVisibleQuiescentAlpha(backAlpha, mView.getMenuButton());
    104         backAlpha = maxVisibleQuiescentAlpha(backAlpha, mView.getImeSwitchButton());
    105         if (backAlpha > 0) {
    106             setKeyButtonViewQuiescentAlpha(mView.getBackButton(), backAlpha, animate);
    107         }
    108     }
    109 
    110     private static float maxVisibleQuiescentAlpha(float max, View v) {
    111         if ((v instanceof KeyButtonView) && v.isShown()) {
    112             return Math.max(max, ((KeyButtonView)v).getQuiescentAlpha());
    113         }
    114         return max;
    115     }
    116 
    117     private void setKeyButtonViewQuiescentAlpha(View button, float alpha, boolean animate) {
    118         if (button instanceof KeyButtonView) {
    119             ((KeyButtonView) button).setQuiescentAlpha(alpha, animate);
    120         }
    121     }
    122 
    123     private void applyLightsOut(boolean lightsOut, boolean animate, boolean force) {
    124         if (!force && lightsOut == mLightsOut) return;
    125 
    126         mLightsOut = lightsOut;
    127 
    128         final View navButtons = mView.getCurrentView().findViewById(R.id.nav_buttons);
    129         final View lowLights = mView.getCurrentView().findViewById(R.id.lights_out);
    130 
    131         // ok, everyone, stop it right there
    132         navButtons.animate().cancel();
    133         lowLights.animate().cancel();
    134 
    135         final float navButtonsAlpha = lightsOut ? 0f : 1f;
    136         final float lowLightsAlpha = lightsOut ? 1f : 0f;
    137 
    138         if (!animate) {
    139             navButtons.setAlpha(navButtonsAlpha);
    140             lowLights.setAlpha(lowLightsAlpha);
    141             lowLights.setVisibility(lightsOut ? View.VISIBLE : View.GONE);
    142         } else {
    143             final int duration = lightsOut ? LIGHTS_OUT_DURATION : LIGHTS_IN_DURATION;
    144             navButtons.animate()
    145                 .alpha(navButtonsAlpha)
    146                 .setDuration(duration)
    147                 .start();
    148 
    149             lowLights.setOnTouchListener(mLightsOutListener);
    150             if (lowLights.getVisibility() == View.GONE) {
    151                 lowLights.setAlpha(0f);
    152                 lowLights.setVisibility(View.VISIBLE);
    153             }
    154             lowLights.animate()
    155                 .alpha(lowLightsAlpha)
    156                 .setDuration(duration)
    157                 .setInterpolator(new AccelerateInterpolator(2.0f))
    158                 .setListener(lightsOut ? null : new AnimatorListenerAdapter() {
    159                     @Override
    160                     public void onAnimationEnd(Animator _a) {
    161                         lowLights.setVisibility(View.GONE);
    162                     }
    163                 })
    164                 .start();
    165         }
    166     }
    167 
    168     private final View.OnTouchListener mLightsOutListener = new View.OnTouchListener() {
    169         @Override
    170         public boolean onTouch(View v, MotionEvent ev) {
    171             if (ev.getAction() == MotionEvent.ACTION_DOWN) {
    172                 // even though setting the systemUI visibility below will turn these views
    173                 // on, we need them to come up faster so that they can catch this motion
    174                 // event
    175                 applyLightsOut(false, false, false);
    176 
    177                 try {
    178                     mBarService.setSystemUiVisibility(0, View.SYSTEM_UI_FLAG_LOW_PROFILE,
    179                             "LightsOutListener");
    180                 } catch (android.os.RemoteException ex) {
    181                 }
    182             }
    183             return false;
    184         }
    185     };
    186 }
    187