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      1 /*
      2  * Copyright (C) 2014 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.camera.burst;
     18 
     19 import android.content.Context;
     20 import android.graphics.SurfaceTexture;
     21 import android.view.Surface;
     22 import android.widget.Toast;
     23 
     24 import com.android.camera.app.OrientationManager.DeviceOrientation;
     25 import com.android.camera.one.OneCamera.Facing;
     26 import com.android.camera.session.CaptureSession;
     27 
     28 /**
     29  * A simple decorator for a {@link BurstFacade} that shows toasts for when a
     30  * burst starts or stops.
     31  * <p>
     32  * This class can simply be removed once we have proper UI for this.
     33  */
     34 public class ToastingBurstFacadeDecorator implements BurstFacade {
     35 
     36     /** Shows burst-related toasts to the user. */
     37     public static class BurstToaster {
     38         private final Context mContext;
     39 
     40         public BurstToaster(Context context) {
     41             mContext = context;
     42         }
     43 
     44         public void showToastBurstStarted() {
     45             Toast.makeText(mContext, MSG_BURST_STARTED, Toast.LENGTH_SHORT).show();
     46         }
     47 
     48         public void showToastBurstStopped() {
     49             Toast.makeText(mContext, MSG_BURST_STOPPED, Toast.LENGTH_SHORT).show();
     50         }
     51     }
     52 
     53     private static final String MSG_BURST_STARTED =
     54             "Keep capture button pressed for duration of burst.";
     55     private static final String MSG_BURST_STOPPED =
     56             "Burst stopped. Please wait a few seconds for the results to appear.";
     57 
     58     private final BurstFacade mBurstFacade;
     59     private final BurstToaster mToaster;
     60 
     61     /**
     62      * Initialize the toasting burst facade decorator.
     63      *
     64      * @param facadeToDecorate the facade to decorate.
     65      * @param toaster the toaster to use to show toasts about the burst status.
     66      */
     67     public ToastingBurstFacadeDecorator(BurstFacade facadeToDecorate, BurstToaster toaster) {
     68         mBurstFacade = facadeToDecorate;
     69         mToaster = toaster;
     70     }
     71 
     72     @Override
     73     public void startBurst(CaptureSession.CaptureSessionCreator captureSessionCreator,
     74             DeviceOrientation deviceOrientation, Facing cameraFacing, int imageOrientationDegrees) {
     75         mToaster.showToastBurstStarted();
     76         mBurstFacade.startBurst(captureSessionCreator, deviceOrientation, cameraFacing,
     77                 imageOrientationDegrees);
     78     }
     79 
     80 
     81     @Override
     82     public boolean stopBurst() {
     83         boolean burstStopped = mBurstFacade.stopBurst();
     84 
     85         // Only show the toast if a burst was actually stopped.
     86         if (burstStopped) {
     87             mToaster.showToastBurstStopped();
     88         }
     89         return burstStopped;
     90     }
     91 
     92     @Override
     93     public void initialize(SurfaceTexture surfaceTexture) {
     94         mBurstFacade.initialize(surfaceTexture);
     95     }
     96 
     97     @Override
     98     public void release() {
     99         mBurstFacade.release();
    100     }
    101 
    102     @Override
    103     public Surface getInputSurface() {
    104         return mBurstFacade.getInputSurface();
    105     }
    106 
    107     @Override
    108     public void setBurstTaker(BurstTaker burstTaker) {
    109         mBurstFacade.setBurstTaker(burstTaker);
    110     }
    111 }
    112