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      1 /*
      2  * Copyright (C) 2010 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 
     21 import com.android.camera.IconListPreference;
     22 import com.android.camera.R;
     23 import com.android.camera.Util;
     24 import com.android.camera.ui.GLListView.OnItemSelectedListener;
     25 
     26 class BasicIndicator extends AbstractIndicator {
     27     private static final int COLOR_OPTION_ITEM_HIGHLIGHT = 0xFF181818;
     28 
     29     private final ResourceTexture mIcon[];
     30     private final IconListPreference mPreference;
     31     protected int mIndex;
     32     private GLListView mPopupContent;
     33     private PreferenceAdapter mModel;
     34     private String mOverride;
     35 
     36     public BasicIndicator(Context context, IconListPreference preference) {
     37         super(context);
     38         mPreference = preference;
     39         mIcon = new ResourceTexture[preference.getLargeIconIds().length];
     40         mIndex = preference.findIndexOfValue(preference.getValue());
     41     }
     42 
     43     // Set the override and/or reload the value from preferences.
     44     private void updateContent(String override, boolean reloadValue) {
     45         if (!reloadValue && Util.equals(mOverride, override)) return;
     46         IconListPreference pref = mPreference;
     47         mOverride = override;
     48         int index = pref.findIndexOfValue(
     49                 override == null ? pref.getValue() : override);
     50         if (mIndex != index) {
     51             mIndex = index;
     52             invalidate();
     53         }
     54     }
     55 
     56     @Override
     57     public void overrideSettings(String key, String settings) {
     58         IconListPreference pref = mPreference;
     59         if (!pref.getKey().equals(key)) return;
     60         updateContent(settings, false);
     61     }
     62 
     63     @Override
     64     public void reloadPreferences() {
     65         if (mModel != null) mModel.reload();
     66         updateContent(null, true);
     67     }
     68 
     69     @Override
     70     public GLView getPopupContent() {
     71         if (mPopupContent == null) {
     72             Context context = getGLRootView().getContext();
     73             mPopupContent = new GLListView(context);
     74             mPopupContent.setHighLight(
     75                     new ColorTexture(COLOR_OPTION_ITEM_HIGHLIGHT));
     76             mPopupContent.setScroller(new NinePatchTexture(
     77                     context, R.drawable.scrollbar_handle_vertical));
     78             mModel = new PreferenceAdapter(context, mPreference);
     79             mPopupContent.setOnItemSelectedListener(new MyListener(mModel));
     80             mPopupContent.setDataModel(mModel);
     81         }
     82         mModel.overrideSettings(mOverride);
     83         return mPopupContent;
     84     }
     85 
     86     protected void onPreferenceChanged(int newIndex) {
     87         if (newIndex == mIndex) return;
     88         mIndex = newIndex;
     89         invalidate();
     90     }
     91 
     92     private class MyListener implements OnItemSelectedListener {
     93 
     94         private final PreferenceAdapter mAdapter;
     95 
     96         public MyListener(PreferenceAdapter adapter) {
     97             mAdapter = adapter;
     98         }
     99 
    100         public void onItemSelected(GLView view, int position) {
    101             mAdapter.onItemSelected(view, position);
    102             onPreferenceChanged(position - 1);
    103         }
    104     }
    105 
    106     @Override
    107     protected ResourceTexture getIcon() {
    108         int index = mIndex;
    109         if (mIcon[index] == null) {
    110             Context context = getGLRootView().getContext();
    111             mIcon[index] = new ResourceTexture(
    112                     context, mPreference.getLargeIconIds()[index]);
    113         }
    114         return mIcon[index];
    115     }
    116 }
    117