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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.camera.ui;
     18 
     19 import android.app.Activity;
     20 import android.content.Context;
     21 import android.content.Intent;
     22 import android.provider.MediaStore;
     23 import android.util.AttributeSet;
     24 import android.view.MotionEvent;
     25 import android.view.View;
     26 import android.view.ViewConfiguration;
     27 import android.widget.FrameLayout;
     28 
     29 import com.android.camera.app.CameraAppUI;
     30 import com.android.camera.debug.Log;
     31 import com.android.camera.util.CameraUtil;
     32 import com.android.camera.util.UsageStatistics;
     33 import com.android.camera.widget.FilmstripLayout;
     34 import com.android.camera2.R;
     35 import com.google.common.logging.eventprotos;
     36 
     37 public class MainActivityLayout extends FrameLayout {
     38 
     39     private final Log.Tag TAG = new Log.Tag("MainActivityLayout");
     40     // Only check for intercepting touch events within first 500ms
     41     private static final int SWIPE_TIME_OUT = 500;
     42 
     43     private ModeListView mModeList;
     44     private FilmstripLayout mFilmstripLayout;
     45     private boolean mCheckToIntercept;
     46     private MotionEvent mDown;
     47     private final int mSlop;
     48     private boolean mRequestToInterceptTouchEvents = false;
     49     private View mTouchReceiver = null;
     50     private final boolean mIsCaptureIntent;
     51     private CameraAppUI.NonDecorWindowSizeChangedListener mNonDecorWindowSizeChangedListener = null;
     52 
     53     // TODO: This can be removed once we come up with a new design for b/13751653.
     54     @Deprecated
     55     private boolean mSwipeEnabled = true;
     56 
     57     public MainActivityLayout(Context context, AttributeSet attrs) {
     58         super(context, attrs);
     59         mSlop = ViewConfiguration.get(context).getScaledTouchSlop();
     60 
     61         Activity activity = (Activity) context;
     62         Intent intent = activity.getIntent();
     63         String action = intent.getAction();
     64         mIsCaptureIntent = (MediaStore.ACTION_IMAGE_CAPTURE.equals(action)
     65                 || MediaStore.ACTION_IMAGE_CAPTURE_SECURE.equals(action)
     66                 || MediaStore.ACTION_VIDEO_CAPTURE.equals(action));
     67     }
     68 
     69     /**
     70      * Enables or disables the swipe for modules not supporting the new swipe
     71      * logic yet.
     72      */
     73     @Deprecated
     74     public void setSwipeEnabled(boolean enabled) {
     75         mSwipeEnabled = enabled;
     76     }
     77 
     78     @Override
     79     public boolean onInterceptTouchEvent(MotionEvent ev) {
     80         if (ev.getActionMasked() == MotionEvent.ACTION_DOWN) {
     81             mCheckToIntercept = true;
     82             mDown = MotionEvent.obtain(ev);
     83             mTouchReceiver = null;
     84             mRequestToInterceptTouchEvents = false;
     85             return false;
     86         } else if (mRequestToInterceptTouchEvents) {
     87             mRequestToInterceptTouchEvents = false;
     88             onTouchEvent(mDown);
     89             return true;
     90         } else if (ev.getActionMasked() == MotionEvent.ACTION_POINTER_DOWN) {
     91             // Do not intercept touch once child is in zoom mode
     92             mCheckToIntercept = false;
     93             return false;
     94         } else {
     95             // TODO: This can be removed once we come up with a new design for b/13751653.
     96             if (!mCheckToIntercept) {
     97                 return false;
     98             }
     99             if (ev.getEventTime() - ev.getDownTime() > SWIPE_TIME_OUT) {
    100                 return false;
    101             }
    102             if (mIsCaptureIntent || !mSwipeEnabled) {
    103                 return false;
    104             }
    105             int deltaX = (int) (ev.getX() - mDown.getX());
    106             int deltaY = (int) (ev.getY() - mDown.getY());
    107             if (ev.getActionMasked() == MotionEvent.ACTION_MOVE
    108                     && Math.abs(deltaX) > mSlop) {
    109                 // Intercept right swipe
    110                 if (deltaX >= Math.abs(deltaY) * 2) {
    111                     mTouchReceiver = mModeList;
    112                     onTouchEvent(mDown);
    113                     return true;
    114                 }
    115                 // Intercept left swipe
    116                 else if (deltaX < -Math.abs(deltaY) * 2) {
    117                     mTouchReceiver = mFilmstripLayout;
    118                     onTouchEvent(mDown);
    119                     return true;
    120                 }
    121             }
    122         }
    123         return false;
    124     }
    125 
    126     @Override
    127     public boolean onTouchEvent(MotionEvent ev) {
    128         if (mTouchReceiver != null) {
    129             mTouchReceiver.setVisibility(VISIBLE);
    130             return mTouchReceiver.dispatchTouchEvent(ev);
    131         }
    132         return false;
    133     }
    134 
    135     @Override
    136     public void onFinishInflate() {
    137         mModeList = (ModeListView) findViewById(R.id.mode_list_layout);
    138         mFilmstripLayout = (FilmstripLayout) findViewById(R.id.filmstrip_layout);
    139     }
    140 
    141     public void redirectTouchEventsTo(View touchReceiver) {
    142         if (touchReceiver == null) {
    143             Log.e(TAG, "Cannot redirect touch to a null receiver.");
    144             return;
    145         }
    146         mTouchReceiver = touchReceiver;
    147         mRequestToInterceptTouchEvents = true;
    148     }
    149 
    150     @Override
    151     public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    152         if (mNonDecorWindowSizeChangedListener != null) {
    153             mNonDecorWindowSizeChangedListener.onNonDecorWindowSizeChanged(
    154                     MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.getSize(heightMeasureSpec),
    155                     CameraUtil.getDisplayRotation(getContext()));
    156         }
    157         super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    158     }
    159 
    160     /**
    161      * Sets a listener that gets notified when the layout size is changed. This
    162      * size is the size of main activity layout. It is also the size of the window
    163      * excluding the system decor such as status bar and nav bar.
    164      */
    165     public void setNonDecorWindowSizeChangedListener(
    166             CameraAppUI.NonDecorWindowSizeChangedListener listener) {
    167         mNonDecorWindowSizeChangedListener = listener;
    168         if (mNonDecorWindowSizeChangedListener != null) {
    169             mNonDecorWindowSizeChangedListener.onNonDecorWindowSizeChanged(
    170                     getMeasuredWidth(), getMeasuredHeight(),
    171                     CameraUtil.getDisplayRotation(getContext()));
    172         }
    173     }
    174 }