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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 && (mode == MODE_TRANSLUCENT || mode == MODE_TRANSPARENT)) {
     64             // translucent mode not allowed when vertical
     65             mode = MODE_OPAQUE;
     66         }
     67         super.transitionTo(mode, animate);
     68     }
     69 
     70     @Override
     71     protected void onTransition(int oldMode, int newMode, boolean animate) {
     72         super.onTransition(oldMode, newMode, animate);
     73         applyMode(newMode, animate, false /*force*/);
     74     }
     75 
     76     private void applyMode(int mode, boolean animate, boolean force) {
     77         // apply to key buttons
     78         final float alpha = alphaForMode(mode);
     79         setKeyButtonViewQuiescentAlpha(mView.getHomeButton(), alpha, animate);
     80         setKeyButtonViewQuiescentAlpha(mView.getRecentsButton(), alpha, animate);
     81         setKeyButtonViewQuiescentAlpha(mView.getMenuButton(), alpha, animate);
     82         setKeyButtonViewQuiescentAlpha(mView.getImeSwitchButton(), alpha, animate);
     83 
     84         applyBackButtonQuiescentAlpha(mode, animate);
     85 
     86         // apply to lights out
     87         applyLightsOut(mode == MODE_LIGHTS_OUT, animate, force);
     88     }
     89 
     90     private float alphaForMode(int mode) {
     91         final boolean isOpaque = mode == MODE_OPAQUE || mode == MODE_LIGHTS_OUT;
     92         return isOpaque ? KeyButtonView.DEFAULT_QUIESCENT_ALPHA : 1f;
     93     }
     94 
     95     public void applyBackButtonQuiescentAlpha(int mode, boolean animate) {
     96         float backAlpha = 0;
     97         backAlpha = maxVisibleQuiescentAlpha(backAlpha, mView.getHomeButton());
     98         backAlpha = maxVisibleQuiescentAlpha(backAlpha, mView.getRecentsButton());
     99         backAlpha = maxVisibleQuiescentAlpha(backAlpha, mView.getMenuButton());
    100         backAlpha = maxVisibleQuiescentAlpha(backAlpha, mView.getImeSwitchButton());
    101         if (backAlpha > 0) {
    102             setKeyButtonViewQuiescentAlpha(mView.getBackButton(), backAlpha, animate);
    103         }
    104     }
    105 
    106     private static float maxVisibleQuiescentAlpha(float max, View v) {
    107         if ((v instanceof KeyButtonView) && v.isShown()) {
    108             return Math.max(max, ((KeyButtonView)v).getQuiescentAlpha());
    109         }
    110         return max;
    111     }
    112 
    113     private void setKeyButtonViewQuiescentAlpha(View button, float alpha, boolean animate) {
    114         if (button instanceof KeyButtonView) {
    115             ((KeyButtonView) button).setQuiescentAlpha(alpha, animate);
    116         }
    117     }
    118 
    119     private void applyLightsOut(boolean lightsOut, boolean animate, boolean force) {
    120         if (!force && lightsOut == mLightsOut) return;
    121 
    122         mLightsOut = lightsOut;
    123 
    124         final View navButtons = mView.getCurrentView().findViewById(R.id.nav_buttons);
    125         final View lowLights = mView.getCurrentView().findViewById(R.id.lights_out);
    126 
    127         // ok, everyone, stop it right there
    128         navButtons.animate().cancel();
    129         lowLights.animate().cancel();
    130 
    131         final float navButtonsAlpha = lightsOut ? 0f : 1f;
    132         final float lowLightsAlpha = lightsOut ? 1f : 0f;
    133 
    134         if (!animate) {
    135             navButtons.setAlpha(navButtonsAlpha);
    136             lowLights.setAlpha(lowLightsAlpha);
    137             lowLights.setVisibility(lightsOut ? View.VISIBLE : View.GONE);
    138         } else {
    139             final int duration = lightsOut ? LIGHTS_OUT_DURATION : LIGHTS_IN_DURATION;
    140             navButtons.animate()
    141                 .alpha(navButtonsAlpha)
    142                 .setDuration(duration)
    143                 .start();
    144 
    145             lowLights.setOnTouchListener(mLightsOutListener);
    146             if (lowLights.getVisibility() == View.GONE) {
    147                 lowLights.setAlpha(0f);
    148                 lowLights.setVisibility(View.VISIBLE);
    149             }
    150             lowLights.animate()
    151                 .alpha(lowLightsAlpha)
    152                 .setDuration(duration)
    153                 .setInterpolator(new AccelerateInterpolator(2.0f))
    154                 .setListener(lightsOut ? null : new AnimatorListenerAdapter() {
    155                     @Override
    156                     public void onAnimationEnd(Animator _a) {
    157                         lowLights.setVisibility(View.GONE);
    158                     }
    159                 })
    160                 .start();
    161         }
    162     }
    163 
    164     private final View.OnTouchListener mLightsOutListener = new View.OnTouchListener() {
    165         @Override
    166         public boolean onTouch(View v, MotionEvent ev) {
    167             if (ev.getAction() == MotionEvent.ACTION_DOWN) {
    168                 // even though setting the systemUI visibility below will turn these views
    169                 // on, we need them to come up faster so that they can catch this motion
    170                 // event
    171                 applyLightsOut(false, false, false);
    172 
    173                 try {
    174                     mBarService.setSystemUiVisibility(0, View.SYSTEM_UI_FLAG_LOW_PROFILE);
    175                 } catch (android.os.RemoteException ex) {
    176                 }
    177             }
    178             return false;
    179         }
    180     };
    181 }
    182