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      1 /*
      2  * Copyright (C) 2011 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.content.Context;
     20 import android.os.Handler;
     21 import android.os.Message;
     22 import android.view.MotionEvent;
     23 import android.view.View;
     24 import android.view.ViewGroup;
     25 import android.view.animation.Animation;
     26 import android.view.animation.AnimationUtils;
     27 import android.widget.ImageView;
     28 
     29 import com.android.camera.R;
     30 
     31 // This is an indicator button and pressing it opens a popup window. Ex: flash or other settings.
     32 public abstract class AbstractIndicatorButton extends RotateImageView implements
     33         PopupManager.OnOtherPopupShowedListener {
     34     @SuppressWarnings("unused")
     35     private static final String TAG = "AbstractIndicatorButton";
     36     protected Animation mFadeIn, mFadeOut;
     37     protected final int HIGHLIGHT_COLOR;
     38     protected AbstractSettingPopup mPopup;
     39     protected Handler mHandler = new MainHandler();
     40     private final int MSG_DISMISS_POPUP = 0;
     41     private IndicatorChangeListener mListener;
     42 
     43     public static interface IndicatorChangeListener {
     44         public void onShowIndicator(View view, boolean showed);
     45     }
     46 
     47     public AbstractIndicatorButton(Context context) {
     48         super(context);
     49         mFadeIn = AnimationUtils.loadAnimation(context, R.anim.setting_popup_grow_fade_in);
     50         mFadeOut = AnimationUtils.loadAnimation(context, R.anim.setting_popup_shrink_fade_out);
     51         HIGHLIGHT_COLOR = context.getResources().getColor(R.color.review_control_pressed_color);
     52         setScaleType(ImageView.ScaleType.CENTER);
     53         PopupManager.getInstance(context).setOnOtherPopupShowedListener(this);
     54         // Set the click listener to help the comprehension of the accessibility.
     55         setClickable(true);
     56     }
     57 
     58     @Override
     59     public void onOtherPopupShowed() {
     60         dismissPopup();
     61     }
     62 
     63     public void setIndicatorChangeListener(IndicatorChangeListener listener) {
     64         mListener = listener;
     65     }
     66 
     67     // Whether scene mode affects this indicator and it cannot be changed.
     68     public boolean isOverridden() {
     69         return false;
     70     }
     71 
     72     // Scene mode may override other settings like flash, white-balance, and focus.
     73     abstract public void overrideSettings(final String ... keyvalues);
     74 
     75     @Override
     76     public boolean onTouchEvent(MotionEvent ev) {
     77         if (!isEnabled()) return false;
     78 
     79         int action = ev.getAction();
     80         if (action == MotionEvent.ACTION_DOWN && !isOverridden()) {
     81             if (mPopup == null || mPopup.getVisibility() != View.VISIBLE) {
     82                 showPopup();
     83                 PopupManager.getInstance(getContext()).notifyShowPopup(this);
     84             } else {
     85                 dismissPopup();
     86             }
     87             return true;
     88         } else if (action == MotionEvent.ACTION_CANCEL) {
     89             dismissPopup();
     90             return true;
     91         }
     92         return false;
     93     }
     94 
     95     @Override
     96     public void setEnabled(boolean enabled) {
     97         // Do not enable the button if it is overridden by scene mode.
     98         if (isOverridden()) {
     99             enabled = false;
    100         }
    101 
    102         // Don't do anything if state is not changed so not to interfere with
    103         // the "highlight" state.
    104         if (isEnabled() ^ enabled) {
    105             super.setEnabled(enabled);
    106         }
    107     }
    108 
    109     @Override
    110     public void setOrientation(int orientation, boolean animation) {
    111         super.setOrientation(orientation, animation);
    112         if (mPopup != null) {
    113             mPopup.setOrientation(orientation, animation);
    114         }
    115     }
    116 
    117     abstract protected void initializePopup();
    118 
    119     private void showPopup() {
    120         setPressed(true);
    121         mHandler.removeMessages(MSG_DISMISS_POPUP);
    122         if (mPopup == null) initializePopup();
    123 
    124         mPopup.setVisibility(View.VISIBLE);
    125         mPopup.setOrientation(getDegree(), false);
    126         mPopup.clearAnimation();
    127         mPopup.startAnimation(mFadeIn);
    128         if (mListener != null) mListener.onShowIndicator(this, true);
    129     }
    130 
    131     public boolean dismissPopup() {
    132         setPressed(false);
    133         mHandler.removeMessages(MSG_DISMISS_POPUP);
    134         if (mPopup != null && mPopup.getVisibility() == View.VISIBLE) {
    135             mPopup.clearAnimation();
    136             mPopup.startAnimation(mFadeOut);
    137             mPopup.setVisibility(View.GONE);
    138             if (mListener != null) mListener.onShowIndicator(this, false);
    139             invalidate();
    140             // Indicator wheel needs to update the highlight indicator if this
    141             // is dismissed by MSG_DISMISS_POPUP.
    142             ((View) getParent()).invalidate();
    143             return true;
    144         }
    145         return false;
    146     }
    147 
    148     public AbstractSettingPopup getPopupWindow() {
    149         if (mPopup != null && mPopup.getVisibility() == View.VISIBLE) {
    150             return mPopup;
    151         } else {
    152             return null;
    153         }
    154     }
    155 
    156     public void removePopupWindow() {
    157         if (mPopup != null) {
    158             ViewGroup root = (ViewGroup) getRootView().findViewById(R.id.frame_layout);
    159             root.removeView(mPopup);
    160             mPopup = null;
    161         }
    162     }
    163 
    164     public void reloadPreference() {
    165         if (mPopup != null) mPopup.reloadPreference();
    166     }
    167 
    168     protected void dismissPopupDelayed() {
    169         if (!mHandler.hasMessages(MSG_DISMISS_POPUP)) {
    170             mHandler.sendEmptyMessage(MSG_DISMISS_POPUP);
    171         }
    172     }
    173 
    174     private class MainHandler extends Handler {
    175         @Override
    176         public void handleMessage(Message msg) {
    177             switch (msg.what) {
    178                 case MSG_DISMISS_POPUP:
    179                     dismissPopup();
    180                     break;
    181             }
    182         }
    183     }
    184 }
    185