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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.email.activity.setup;
     18 
     19 import android.os.Bundle;
     20 import android.preference.ListPreference;
     21 import android.preference.Preference;
     22 import android.preference.PreferenceCategory;
     23 import android.preference.Preference.OnPreferenceChangeListener;
     24 import android.preference.PreferenceFragment;
     25 import android.preference.PreferenceScreen;
     26 import android.widget.Toast;
     27 
     28 import com.android.email.Preferences;
     29 import com.android.email.R;
     30 import com.android.email.activity.UiUtilities;
     31 
     32 public class GeneralPreferences extends PreferenceFragment implements OnPreferenceChangeListener  {
     33 
     34     private static final String PREFERENCE_CATEGORY_KEY = "category_general_preferences";
     35 
     36     private static final String PREFERENCE_KEY_AUTO_ADVANCE = "auto_advance";
     37     private static final String PREFERENCE_KEY_TEXT_ZOOM = "text_zoom";
     38     private static final String PREFERENCE_KEY_REPLY_ALL = Preferences.REPLY_ALL;
     39     private static final String PREFERENCE_KEY_CLEAR_TRUSTED_SENDERS = "clear_trusted_senders";
     40 
     41     private Preferences mPreferences;
     42     private ListPreference mAutoAdvance;
     43     private ListPreference mTextZoom;
     44 
     45     CharSequence[] mSizeSummaries;
     46 
     47     @Override
     48     public void onCreate(Bundle savedInstanceState) {
     49         super.onCreate(savedInstanceState);
     50 
     51         getPreferenceManager().setSharedPreferencesName(Preferences.PREFERENCES_FILE);
     52 
     53         // Load the preferences from an XML resource
     54         addPreferencesFromResource(R.xml.general_preferences);
     55 
     56         if (UiUtilities.useTwoPane(getActivity())) {
     57             // "Reply All" should only be shown on phones
     58             PreferenceCategory pc = (PreferenceCategory) findPreference(PREFERENCE_CATEGORY_KEY);
     59             pc.removePreference(findPreference(PREFERENCE_KEY_REPLY_ALL));
     60         }
     61     }
     62 
     63     @Override
     64     public void onResume() {
     65         loadSettings();
     66         super.onResume();
     67     }
     68 
     69     @Override
     70     public boolean onPreferenceChange(Preference preference, Object newValue) {
     71         String key = preference.getKey();
     72 
     73         if (PREFERENCE_KEY_AUTO_ADVANCE.equals(key)) {
     74             mPreferences.setAutoAdvanceDirection(mAutoAdvance.findIndexOfValue((String) newValue));
     75             return true;
     76         } else if (PREFERENCE_KEY_TEXT_ZOOM.equals(key)) {
     77             mPreferences.setTextZoom(mTextZoom.findIndexOfValue((String) newValue));
     78             reloadDynamicSummaries();
     79             return true;
     80         }
     81         return false;
     82     }
     83 
     84     @Override
     85     public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
     86         if (getActivity() == null) {
     87             // Guard against monkeys.
     88             return false;
     89         }
     90 
     91         String key = preference.getKey();
     92         if (key.equals(PREFERENCE_KEY_CLEAR_TRUSTED_SENDERS)) {
     93             mPreferences.clearTrustedSenders();
     94             Toast.makeText(
     95                     getActivity(), R.string.trusted_senders_cleared, Toast.LENGTH_SHORT).show();
     96             return true;
     97         }
     98 
     99         return false;
    100     }
    101 
    102     private void loadSettings() {
    103         mPreferences = Preferences.getPreferences(getActivity());
    104         mAutoAdvance = (ListPreference) findPreference(PREFERENCE_KEY_AUTO_ADVANCE);
    105         mAutoAdvance.setValueIndex(mPreferences.getAutoAdvanceDirection());
    106         mAutoAdvance.setOnPreferenceChangeListener(this);
    107 
    108         mTextZoom = (ListPreference) findPreference(PREFERENCE_KEY_TEXT_ZOOM);
    109         mTextZoom.setValueIndex(mPreferences.getTextZoom());
    110         mTextZoom.setOnPreferenceChangeListener(this);
    111 
    112         reloadDynamicSummaries();
    113     }
    114 
    115     /**
    116      * Reload any preference summaries that are updated dynamically
    117      */
    118     private void reloadDynamicSummaries() {
    119         int textZoomIndex = mPreferences.getTextZoom();
    120         // Update summary - but only load the array once
    121         if (mSizeSummaries == null) {
    122             mSizeSummaries = getActivity().getResources()
    123                     .getTextArray(R.array.general_preference_text_zoom_summary_array);
    124         }
    125         CharSequence summary = null;
    126         if (textZoomIndex >= 0 && textZoomIndex < mSizeSummaries.length) {
    127             summary = mSizeSummaries[textZoomIndex];
    128         }
    129         mTextZoom.setSummary(summary);
    130     }
    131 }
    132