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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.PreferenceGroup;
     23 import com.android.camera.R;
     24 import com.android.camera.Util;
     25 import com.android.camera.ui.GLListView.OnItemSelectedListener;
     26 
     27 public class BasicIndicator extends AbstractIndicator {
     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,
     37             PreferenceGroup group, IconListPreference preference) {
     38         super(context);
     39         mPreference = preference;
     40         mIcon = new ResourceTexture[preference.getLargeIconIds().length];
     41         mIndex = preference.findIndexOfValue(preference.getValue());
     42     }
     43 
     44     // Set the override and/or reload the value from preferences.
     45     private void updateContent(String override, boolean reloadValue) {
     46         if (!reloadValue && Util.equals(mOverride, override)) return;
     47         IconListPreference pref = mPreference;
     48         mOverride = override;
     49         int index = pref.findIndexOfValue(
     50                 override == null ? pref.getValue() : override);
     51         if (mIndex != index) {
     52             mIndex = index;
     53             invalidate();
     54         }
     55     }
     56 
     57     @Override
     58     public void overrideSettings(String key, String settings) {
     59         IconListPreference pref = mPreference;
     60         if (!pref.getKey().equals(key)) return;
     61         updateContent(settings, false);
     62     }
     63 
     64     @Override
     65     public void reloadPreferences() {
     66         if (mModel != null) mModel.reload();
     67         updateContent(null, true);
     68     }
     69 
     70     @Override
     71     public GLView getPopupContent() {
     72         if (mPopupContent == null) {
     73             Context context = getGLRootView().getContext();
     74             mPopupContent = new GLListView(context);
     75             mPopupContent.setHighLight(new NinePatchTexture(
     76                     context, R.drawable.optionitem_highlight));
     77             mPopupContent.setScroller(new NinePatchTexture(
     78                     context, R.drawable.scrollbar_handle_vertical));
     79             mModel = new PreferenceAdapter(context, mPreference);
     80             mPopupContent.setOnItemSelectedListener(new MyListener(mModel));
     81             mPopupContent.setDataModel(mModel);
     82         }
     83         mModel.overrideSettings(mOverride);
     84         return mPopupContent;
     85     }
     86 
     87     protected void onPreferenceChanged(int newIndex) {
     88         if (newIndex == mIndex) return;
     89         mIndex = newIndex;
     90         invalidate();
     91     }
     92 
     93     private class MyListener implements OnItemSelectedListener {
     94 
     95         private final PreferenceAdapter mAdapter;
     96 
     97         public MyListener(PreferenceAdapter adapter) {
     98             mAdapter = adapter;
     99         }
    100 
    101         public void onItemSelected(GLView view, int position) {
    102             mAdapter.onItemSelected(view, position);
    103             onPreferenceChanged(position - 1);
    104         }
    105     }
    106 
    107     @Override
    108     protected ResourceTexture getIcon() {
    109         int index = mIndex;
    110         if (mIcon[index] == null) {
    111             Context context = getGLRootView().getContext();
    112             mIcon[index] = new ResourceTexture(
    113                     context, mPreference.getLargeIconIds()[index]);
    114         }
    115         return mIcon[index];
    116     }
    117 }
    118