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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.settings;
     18 
     19 import com.android.systemui.R;
     20 
     21 import android.app.Dialog;
     22 import android.content.Context;
     23 import android.content.res.Resources;
     24 import android.os.Bundle;
     25 import android.os.Handler;
     26 import android.util.Log;
     27 import android.view.Window;
     28 import android.view.WindowManager;
     29 import android.widget.ImageView;
     30 
     31 import java.lang.Runnable;
     32 
     33 /** A dialog that provides controls for adjusting the screen brightness. */
     34 public class BrightnessDialog extends Dialog implements
     35         BrightnessController.BrightnessStateChangeCallback {
     36 
     37     private static final String TAG = "BrightnessDialog";
     38     private static final boolean DEBUG = false;
     39 
     40     protected Handler mHandler = new Handler();
     41 
     42     private BrightnessController mBrightnessController;
     43     private final int mBrightnessDialogLongTimeout;
     44     private final int mBrightnessDialogShortTimeout;
     45 
     46     private final Runnable mDismissDialogRunnable = new Runnable() {
     47         public void run() {
     48             if (BrightnessDialog.this.isShowing()) {
     49                 BrightnessDialog.this.dismiss();
     50             }
     51         };
     52     };
     53 
     54 
     55     public BrightnessDialog(Context ctx) {
     56         super(ctx);
     57         Resources r = ctx.getResources();
     58         mBrightnessDialogLongTimeout =
     59                 r.getInteger(R.integer.quick_settings_brightness_dialog_long_timeout);
     60         mBrightnessDialogShortTimeout =
     61                 r.getInteger(R.integer.quick_settings_brightness_dialog_short_timeout);
     62     }
     63 
     64 
     65     /**
     66      * Create the brightness dialog and any resources that are used for the
     67      * entire lifetime of the dialog.
     68      */
     69     @Override
     70     public void onCreate(Bundle savedInstanceState) {
     71         super.onCreate(savedInstanceState);
     72         Window window = getWindow();
     73         window.setType(WindowManager.LayoutParams.TYPE_VOLUME_OVERLAY);
     74         window.getAttributes().privateFlags |=
     75                 WindowManager.LayoutParams.PRIVATE_FLAG_SHOW_FOR_ALL_USERS;
     76         window.clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);
     77         window.requestFeature(Window.FEATURE_NO_TITLE);
     78 
     79         setContentView(R.layout.quick_settings_brightness_dialog);
     80         setCanceledOnTouchOutside(true);
     81     }
     82 
     83 
     84     @Override
     85     protected void onStart() {
     86         super.onStart();
     87         mBrightnessController = new BrightnessController(getContext(),
     88                 (ImageView) findViewById(R.id.brightness_icon),
     89                 (ToggleSlider) findViewById(R.id.brightness_slider));
     90         dismissBrightnessDialog(mBrightnessDialogLongTimeout);
     91         mBrightnessController.addStateChangedCallback(this);
     92     }
     93 
     94     @Override
     95     protected void onStop() {
     96         super.onStop();
     97         mBrightnessController.unregisterCallbacks();
     98         removeAllBrightnessDialogCallbacks();
     99     }
    100 
    101     public void onBrightnessLevelChanged() {
    102         dismissBrightnessDialog(mBrightnessDialogShortTimeout);
    103     }
    104 
    105     private void dismissBrightnessDialog(int timeout) {
    106         removeAllBrightnessDialogCallbacks();
    107         mHandler.postDelayed(mDismissDialogRunnable, timeout);
    108     }
    109 
    110     private void removeAllBrightnessDialogCallbacks() {
    111         mHandler.removeCallbacks(mDismissDialogRunnable);
    112     }
    113 
    114 }
    115